acl6 acl6-number: Displays the IPv6 FIB entries permitted by a specific ACL. The ACL number is in the range of 2000 to 2999. If the specified ACL does not exist, this command displays all IPv6 FIB entries.

ipv6-prefix ipv6-prefix-name: Displays the IPv6 FIB entries matching a specific prefix list. The ipv6-prefix-name argument is a case-sensitive string of 1 to 19 characters. If the specified prefix list does not exist, this command displays all IPv6 FIB entries.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

The device looks up a matching IPv6 FIB entry for forwarding an IPv6 packet.

Examples

# Display all IPv6 FIB entries.

<Sysname> display ipv6 fib

FIB Table:

Total number of Routes : 1

Flag:

U:Useable G:Gateway H:Host B:Blackhole D:Dynamic S:Static

Destination: ::1 PrefixLength : 128

NextHop : ::1 Flag : UH

Label : NULL Token : 0

Interface : InLoopBack0

Table 1 Command output

Field	Description
Total number of Routes	Total number of routes in the FIB.
Destination	Destination address.
PrefixLength	Prefix length of the destination address.
NextHop	Next hop.
Flag	Route flag: · U—Usable route. · G—Gateway route. · H—Host route. · B—Black hole route. · D—Dynamic route. · S—Static route.
Label	Label.
Token	Label switched path index number.
Interface	Outgoing interface.

display ipv6 fib ipv6-address

Use display ipv6 fib ipv6-address to display the IPv6 FIB entry of the specified destination IPv6 address.

Syntax

display ipv6 fib ipv6-address [ prefix-length ] [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

ipv6-address: Destination IPv6 address.

prefix-length: Prefix length of the destination IPv6 address, in the range of 0 to 128.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

If you do not specify the prefix-length argument, this command displays the IPv6 FIB entry that most closely matches the destination IPv6 address.

If you specify the prefix-length argument, this command displays the IPv6 FIB entry that exactly matches the specified destination IPv6 address and prefix length.

Examples

# Display the IPv6 FIB entry that most closely matches the destination IPv6 address.

<Sysname> display ipv6 fib ::1

FIB Table:

Total number of Routes : 1

Flag:

U:Useable G:Gateway H:Host B:Blackhole D:Dynamic S:Static

Destination: ::1 PrefixLength : 128

NextHop : ::1 Flag : UH

Label : Null Token : Invalid

Interface : InLoopBack0

Table 2 Command output

Field	Description
Total number of Routes	Total number of routes in the FIB.
Destination	Destination address.
PrefixLength	Prefix length of the destination address.
NextHop	Next hop.
Flag	Route flag: · U—Usable route. · G—Gateway route. · H—Host route. · B—Black hole route. · D—Dynamic route. · S—Static route.
Label	Label.
Token	Label switched path index number.
Interface	Outgoing interface.

display ipv6 interface

Use display ipv6 interface to display IPv6 information about an interface.

Syntax

display ipv6 interface [ interface-type [ interface-number ] ] [ brief ] [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

interface-type: Interface type.

interface-number: Interface number.

brief: Displays brief IPv6 information about an interface.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

If you do not specify interface-type interface-number, this command displays IPv6 information about all interfaces.

If you specify only interface-type, this command displays IPv6 information about the interfaces of the specified type.

If you specify interface-type interface-number, this command displays IPv6 information about the specified interface. If you also specify the brief keyword, this command displays brief IPv6 information about the interface.

Examples

# Display IPv6 information about VLAN-interface 2.

<Sysname> display ipv6 interface vlan-interface 2

Vlan-interface2 current state :UP

Line protocol current state :UP

IPv6 is enabled, link-local address is FE80::1234:56FF:FE65:4322

Global unicast address(es):

2001::1, subnet is 2001::/64

10::1234:56FF:FE65:4322, subnet is 10::/64 [AUTOCFG]

[valid lifetime 4641s/preferred lifetime 4637s]

Joined group address(es):

FF02::1:FF00:1

FF02::1:FF65:4322

FF02::2

FF02::1

MTU is 1500 bytes

ND DAD is enabled, number of DAD attempts: 1

ND reachable time is 30000 milliseconds

ND retransmit interval is 1000 milliseconds

Hosts use stateless autoconfig for addresses

IPv6 Packet statistics:

InReceives: 0

InTooShorts: 0

InTruncatedPkts: 0

InHopLimitExceeds: 0

InBadHeaders: 0

InBadOptions: 0

ReasmReqds: 0

ReasmOKs: 0

InFragDrops: 0

InFragTimeouts: 0

OutFragFails: 0

InUnknownProtos: 0

InDelivers: 0

OutRequests: 0

OutForwDatagrams: 0

InNoRoutes: 0

InTooBigErrors: 0

OutFragOKs: 0

OutFragCreates: 0

InMcastPkts: 0

InMcastNotMembers: 0

OutMcastPkts: 0

InAddrErrors: 0

InDiscards: 0

OutDiscards: 0

Table 3 Command output (on a switch)

Field	Description
Vlan-interface2 current state	Physical state of the interface: · Administratively DOWN—The VLAN interface has been shut down with the shutdown command. · DOWN—The VLAN interface is administratively up but its physical state is down. No ports in the VLAN are up due to a connection or link failure. · UP—The administrative and physical states of the VLAN interface are both up.
Line protocol current state	Link layer protocol state of the interface: · DOWN—The link layer protocol state of the VLAN interface is down. · UP—The link layer protocol state of the VLAN interface is up.
IPv6 is enabled	IPv6 packet forwarding state of the interface. IPv6 packet forwarding is enabled in the example. After an IPv6 address is configured for an interface, IPv6 is automatically enabled on it.
link-local address	Link-local address configured for the interface.
Global unicast address(es)	Global unicast addresses configured for the interface.
valid lifetime	Valid lifetime of the global unicast address obtained through stateless autoconfiguration.
preferred lifetime	Preferred lifetime of the global unicast address obtained through stateless autoconfiguration.
Joined group address(es)	Addresses of multicast groups that the interface has joined.
MTU	Maximum transmission unit of the interface.
ND DAD is enabled, number of DAD attempts	Whether Duplicate Address Detection (DAD) is enabled. In this example, DAD is enabled. · If DAD is enabled, the number of attempts to send a Neighbor Solicitation (NS) message for DAD (configured with the ipv6 nd dad attempts command) is also displayed. · If DAD is disabled, ND DAD is disabled is displayed. (You can disable DAD by setting the number of attempts to send an NS message for DAD to 0.)
ND reachable time	Time that a neighboring node is considered reachable after reachability has been confirmed.
ND retransmit interval	Interval for retransmitting an NS message.
Hosts use stateless autoconfig for addresses	Hosts obtain IPv6 addresses through stateless autoconfiguration.
InReceives	All IPv6 packets received by the interface, including error packets.
InTooShorts	Received IPv6 packets that are too short, with a length less than 40 bytes, for example.
InTruncatedPkts	Received IPv6 packets with a length less than that specified in the packets.
InHopLimitExceeds	Received IPv6 packets with a hop count exceeding the limit.
InBadHeaders	Received IPv6 packets with incorrect basic headers.
InBadOptions	Received IPv6 packets with incorrect extension headers.
ReasmReqds	Received IPv6 fragments.
ReasmOKs	Number of reassembled packets rather than the number of fragments.
InFragDrops	IPv6 fragments discarded because of certain errors.
InFragTimeouts	IPv6 fragments discarded because the interval for which they had stayed in the system buffer exceeded the specified period.
OutFragFails	Packets that failed to be fragmented on the outbound interface.
InUnknownProtos	Received IPv6 packets with unknown or unsupported protocol type.
InDelivers	Received IPv6 packets that were delivered to application layer protocols (such as ICMPv6, TCP, and UDP).
OutRequests	Local IPv6 packets sent by IPv6 application protocols.
OutForwDatagrams	Packets forwarded by the outbound interface.
InNoRoutes	IPv6 packets that were discarded because no matched route can be found.
InTooBigErrors	IPv6 packets that were discarded because they exceeded the Path MTU.
OutFragOKs	Packets that were fragmented on the outbound interface.
OutFragCreates	Number of fragmented packets on the outbound interface.
InMcastPkts	IPv6 multicast packets received on the interface.
InMcastNotMembers	Incoming IPv6 multicast packets that were discarded because the interface is not in the corresponding multicast group.
OutMcastPkts	IPv6 multicast packets sent by the interface.
InAddrErrors	IPv6 packets that were discarded due to invalid destination addresses.
InDiscards	Received IPv6 packets that were discarded due to resource problems rather than packet content errors.
OutDiscards	Sent packets that were discarded due to resource problems rather than packet content errors.

# Display brief IPv6 information about all interfaces.

<Sysname> display ipv6 interface brief

*down: administratively down

(s): spoofing

Interface Physical Protocol IPv6 Address

Vlan-interface1 down down Unassigned

Vlan-interface2 up up 2001::1

Vlan-interface100 up down Unassigned

Table 4 Command output

Field	Description
*down: administratively down	The interface has been shut down with the shutdown command.
(s): spoofing	Spoofing attribute of the interface. The link protocol state of the interface is up, but the link is an on-demand link or does not exist.
Interface	Name of the interface.
Physical	Physical state of the interface: · *down—The VLAN interface is administratively shut down by the shutdown command. · down—The VLAN interface is administratively up but its physical state is down. No port in the VLAN is up due to a connection or link failure. · up—The administrative and physical states of the VLAN interface are both up.
Protocol	Link layer protocol state of the interface: · down—The network layer protocol state of the VLAN interface is down. · up—The network layer protocol state of the VLAN interface is up.
IPv6 Address	IPv6 address of the interface. Only the first configured IPv6 address is displayed. If no address is configured for the interface, Unassigned is displayed.

display ipv6 neighbors

Use display ipv6 neighbors to display neighbor information.

Syntax

display ipv6 neighbors { ipv6-address | all | dynamic | interface interface-type interface-number | static | vlan vlan-id } [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

ipv6-address: IPv6 address whose neighbor information is to be displayed.

all: Displays information about all neighbors, including neighbors acquired dynamically and configured statically on the public network and all private networks.

dynamic: Displays information about all neighbors acquired dynamically.

static: Displays information about all neighbors configured statically.

interface interface-type interface-number: Displays information about the neighbors of a specific interface.

vlan vlan-id: Displays information about the neighbors of a specific VLAN. The value range for the VLAN ID is 1 to 4094.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

You can use the reset ipv6 neighbors command to clear specific IPv6 neighbor information.

Examples

# Display all neighbor information.

<Sysname> display ipv6 neighbors all

Type: S-Static D-Dynamic

IPv6 Address Link-layer VID Interface State T Age

FE80::200:5EFF:FE32:B800 0000-5e32-b800 N/A XGE1/0/1 REACH S -

Table 5 Command output

Field	Description
IPv6 Address	IPv6 address of a neighbor.
Link-layer	Link layer address (MAC address) of a neighbor.
VID	VLAN to which the interface connected with a neighbor belongs.
Interface	Interface connected with a neighbor.
State	State of a neighbor: · INCMP—The address is being resolved. The link layer address of the neighbor is unknown. · REACH—The neighbor is reachable. · STALE—The reachability of the neighbor is unknown. The device does not verify the reachability any longer unless data is sent to the neighbor. · DELAY—The reachability of the neighbor is unknown. The device sends an NS message after a delay. · PROBE—The reachability of the neighbor is unknown. The device sends an NS message to verify the reachability of the neighbor.
Type	Type of neighbor information: · S—static configuration. · D—dynamic acquisition.
Age	For a static entry, a hyphen (-) is displayed. For a dynamic entry, the reachable time (in seconds) elapsed is displayed, and if it is never reachable, a pound (#) is displayed (for a neighbor acquired dynamically).

Related commands

· ipv6 neighbor

· reset ipv6 neighbors

display ipv6 neighbors count

Use display ipv6 neighbors count to display the total number of neighbor entries satisfying the specified condition.

Syntax

display ipv6 neighbors { all | dynamic | interface interface-type interface-number | static | vlan vlan-id } count [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

all: Displays the total number of all neighbor entries, including neighbor entries acquired dynamically and configured statically.

dynamic: Displays the total number of neighbor entries acquired dynamically.

static: Displays the total number of neighbor entries configured statically.

interface interface-type interface-number: Displays the total number of neighbor entries of a specific interface.

vlan vlan-id: Displays the total number of neighbor entries of a specific VLAN. The value range for the VLAN ID is 1 to 4094.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Examples

# Display the total number of neighbor entries acquired dynamically.

<Sysname> display ipv6 neighbors dynamic count

Total dynamic entry(ies): 2

display ipv6 pathmtu

Use display ipv6 pathmtu to display the IPv6 path MTU information.

Syntax

display ipv6 pathmtu { ipv6-address | all | dynamic | static } [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

ipv6-address: Destination IPv6 address for which the path MTU information is to be displayed.

all: Displays all path MTU information on the public network.

dynamic: Displays all dynamic path MTU information.

static: Displays all static path MTU information.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Examples

# Display all path MTU information.

<Sysname> display ipv6 pathmtu all

IPv6 Destination Address ZoneID PathMTU Age Type

fe80::12 0 1300 40 Dynamic

2222::3 0 1280 -- Static

Table 6 Command output

Field	Description
IPv6 Destination Address	Destination IPv6 address.
ZoneID	VPN index. If the information is for the public network, this field displays 0.
PathMTU	Path MTU value on the network path to an IPv6 address.
Age	Time for a path MTU to live. For a static path MTU, two hyphens (--) are displayed.
Type	The path MTU is dynamically negotiated or statically configured.

display ipv6 prefix

Use display ipv6 prefix to display information about IPv6 prefixes, including dynamic and static prefixes.

Syntax

display ipv6 prefix [ prefix-number ] [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

prefix-number: Specifies the ID of an IPv6 prefix, in the range of 1 to 1024. If you do not specify this argument, the command displays information about all IPv6 prefixes.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

Static IPv6 prefixes are created with the ipv6 prefix command.

Dynamic IPv6 prefixes are generated with a specific ID based on the prefix that is obtained from the DHCPv6 server. For more information, see the ipv6 dhcp client pd command.

Examples

# Display information about all IPv6 prefixes.

<Sysname> display ipv6 prefix

Number Prefix Type

1 1::/16 Static

2 ABCD:77D8::/32 Dynamic

# Display information about the IPv6 prefix with the specified ID.

<Sysname> display ipv6 prefix 1

Number: 1

Type : Dynamic

Prefix: ABCD:77D8::/32

Preferred lifetime 90 sec, valid lifetime 120 sec

Table 7 Command output

Field	Description
Number	Prefix ID.
Type	Prefix type: · Static—Static IPv6 prefix. · Dynamic—Dynamic IPv6 prefix.
Prefix	Prefix and its length. Not-available indicates that no prefix is obtained.
Preferred lifetime	Preferred lifetime in seconds. For a static IPv6 prefix, this field is not displayed.
valid lifetime	Valid lifetime in seconds. For a static IPv6 prefix, this field is not displayed.

display ipv6 socket

Use display ipv6 socket to display socket information.

Syntax

display ipv6 socket [ socktype socket-type ] [ task-id socket-id ] [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

socktype socket-type: Displays socket information about this type. The socket type is in the range of 1 to 3. The value 1 represents a TCP socket, 2 a UDP socket, and 3 a raw socket.

task-id: Displays socket information about the task. The value range for the task-id argument is 1 to 150.

socket-id: Displays information about the socket. The socket ID is in the range of 0 to 3072.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

If you do not specify any parameter, this command displays information about all the sockets.

If you specify only the socket type, the command displays information about sockets of the specified type.

If you specify the socket type, task ID, and socket ID, the command displays information about the specified socket.

Examples

# Display information about all sockets.

<Sysname> display ipv6 socket

SOCK_STREAM:

Task = VTYD(14), socketid = 4, Proto = 6,

LA = ::->22, FA = ::->0,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 0, rb_cc = 0,

socket option = SO_ACCEPTCONN SO_REUSEPORT SO_SENDVPNID,

socket state = SS_PRIV SS_ASYNC

Task = VTYD(14), socketid = 3, Proto = 6,

LA = ::->23, FA = ::->0,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 0, rb_cc = 0,

socket option = SO_ACCEPTCONN SO_REUSEPORT SO_SENDVPNID,

socket state = SS_PRIV SS_ASYNC

SOCK_DGRAM:

Task = AGNT(51), socketid = 2, Proto = 17,

LA = ::->161, FA = ::->0,

sndbuf = 9216, rcvbuf = 42080, sb_cc = 0, rb_cc = 0,

socket option = SO_REUSEPORT,

socket state = SS_PRIV SS_NBIO SS_ASYNC

Task = TRAP(52), socketid = 2, Proto = 17,

LA = ::->1024, FA = ::->0,

sndbuf = 9216, rcvbuf = 42080, sb_cc = 0, rb_cc = 0,

socket option =,

socket state = SS_PRIV

SOCK_RAW:

Task = ROUT(86), socketid = 5, Proto = 89,

LA = ::, FA = ::,

sndbuf = 262144, rcvbuf = 262144, sb_cc = 0, rb_cc = 0,

socket option = SO_REUSEADDR,

socket state = SS_PRIV SS_ASYNC

Table 8 Command output

Field	Description
SOCK_STREAM	TCP socket.
SOCK_DGRAM	UDP socket.
SOCK_RAW	Raw IP socket.
Task	Task name and ID of the created socket.
socketid	ID assigned by the kernel to the created socket.
Proto	Protocol type, for example, 6 indicates TCP and 17 indicates UDP.
LA	Local address and local port number.
FA	Remote address and remote port number.
sndbuf	Size of the send buffer.
rcvbuf	Size of the receive buffer.
sb_cc	Number of bytes sent by the send buffer.
rb_cc	Number of bytes received by the receive buffer.
socket option	Socket option set by the application: · SO_ACCEPTCONN—Detects connection request at the server end. · SO_REUSEADDR—Allows for reuse of a local address. · SO_REUSEPORT—Allows for reuse of a local port. · SO_SENDVPNID—Enables sending of the VPN ID.
socket state	State of the socket.

display ipv6 statistics

Use display ipv6 statistics to display statistics of IPv6 packets and ICMPv6 packets.

Syntax

display ipv6 statistics [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

You can use the reset ipv6 statistics command to clear all IPv6 and ICMPv6 packet statistics.

Examples

# Display the statistics of IPv6 packets and ICMPv6 packets.

<Sysname> display ipv6 statistics

IPv6 Protocol:

Sent packets:

Total: 0

Local sent out: 0 forwarded: 0

raw packets: 0 discarded: 0

routing failed: 0 fragments: 0

fragments failed: 0

Received packets:

Total: 0

local host: 0 hopcount exceeded: 0

format error: 0 option error: 0

protocol error: 0 fragments: 0

reassembled: 0 reassembly failed: 0

reassembly timeout: 0

ICMPv6 protocol:

Sent packets:

Total: 0

unreached: 0 too big: 0

hopcount exceeded: 0 reassembly timeout: 0

parameter problem: 0

echo request: 0 echo replied: 0

neighbor solicit: 0 neighbor advert: 0

router solicit: 0 router advert: 0

redirected: 0 router renumbering: 0

Send failed:

ratelimited: 0 other errors: 0

Received packets:

Total: 0

checksum error: 0 too short: 0

bad code: 0

unreached: 0 too big: 0

hopcount exceeded: 0 reassembly timeout: 0

parameter problem: 0 unknown error type: 0

echo request: 0 echo replied: 0

neighbor solicit: 0 neighbor advert: 0

router solicit: 0 router advert: 0

redirected: 0 router renumbering: 0

unknown info type: 0

Deliver failed:

bad length: 0 ratelimited: 0

Table 9 Command output

Field	Description
IPv6 Protocol	Statistics of IPv6 packets.
Sent packets	Statistics of sent IPv6 packets: · Total—Total number of packets sent and forwarded locally. · local sent out—Number of packets sent locally. · forwarded—Number of forwarded packets. · raw packets—Number of packets sent through raw socket. · discarded—Number of discarded packets. · routing failed—Number of packets failing to be routed. · fragments—Number of sent fragment packets. · fragments failed—Number of fragments failing to be sent.
Received packets	Statistics of received IPv6 packets: · Total—Total number of received packets. · local host—Number of packets received locally. · hopcount exceeded—Number of packets exceeding the hop limit. · format error—Number of packets in an incorrect format. · option error—Number of packets with incorrect options. · protocol error—Number of packets with incorrect protocol. · fragments—Number of received fragment packets. · reassembled—Number of reassembled packets. · reassembly failed—Number of packets failing to be reassembled. · reassembly timeout—Number of packets whose reassembly times out.
ICMPv6 protocol	Statistics of ICMPv6 packets.
Sent packets	Statistics of sent ICMPv6 packets: · Total—Total number of sent packets. · unreached—Number of Destination Unreachable packets. · too big—Number of Packet Too Big packets. · hopcount exceeded—Number of Hop Limit Exceeded packets. · reassembly timeout—Number of Fragment Reassembly Time Exceeded packets. · parameter problem—Number of Parameter Problem packets. · echo request—Number of Echo Request packets. · echo replied—Number of Echo Reply packets. · neighbor solicit—Number of neighbor solicitation packets. · neighbor advert—Number of neighbor advertisement packets. · router solicit—Number of router solicitation packets. · router advert—Number of router advertisement packets. · redirected—Number of Redirect packets. · router renumbering—Number of router renumber (RR) packets. · send failed Total number of packets failed to send. · ratelimited—Number of packets failing to be sent due to rate limitation. · other errors—Number of packets with other errors.
Received packets	Statistics of received ICMPv6 packets: · Total—Total number of received packets. · checksum error—Number of packets with checksum errors. · too short—Number of too small packets. · bad code—Number of packets with error codes. · unreached—Number of Destination Unreachable packets. · too big—Number of Packet Too Big packets. · hopcount exceeded—Number of Hop Limit Exceeded packets. · reassembly timeout—Number of Fragment Reassembly Times Exceeded packets. · parameter problem—Number of Parameter Problem packets. · unknown error type—Number of packets with unknown errors. · echo request—Number of Echo Request packets. · echo replied—Number of Echo Reply packets. · neighbor solicit—Number of neighbor solicitation messages. · neighbor advert—Number of neighbor advertisement packets. · router solicit—Number of router solicitation packets. · router advert—Number of router advertisement packets. · redirected—Number of Redirect packets. · router renumbering—Number of RR packets. · unknown info type—Number of unknown type of packets. · deliver failed—Total number of packets failed to receive. · bad length—Number of packets with an incorrect size. · ratelimited—Number of packets failed to receive due to rate limitation.

display tcp ipv6 statistics

Use display tcp ipv6 statistics to display IPv6 TCP connection statistics.

Syntax

display tcp ipv6 statistics [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

You can use the reset tcp ipv6 statistics command to clear statistics of all IPv6 TCP packets.

Examples

# Display the statistics of IPv6 TCP connections.

<Sysname> display tcp ipv6 statistics

Received packets:

Total: 0

packets in sequence: 0 (0 bytes)

window probe packets: 0, window update packets: 0

checksum error: 0, offset error: 0, short error: 0

duplicate packets: 0 (0 bytes), partially duplicate packets: 0 (0 bytes)

out-of-order packets: 0 (0 bytes)

packets with data after window: 0 (0 bytes)

packets after close: 0

ACK packets: 0 (0 bytes)

duplicate ACK packets: 0, too much ACK packets: 0

Sent packets:

Total: 0

urgent packets: 0

control packets: 0 (including 0 RST)

window probe packets: 0, window update packets: 0

data packets: 0 (0 bytes) data packets retransmitted: 0 (0 bytes)

ACK only packets: 0 (0 delayed)

Retransmitted timeout: 0, connections dropped in retransmitted timeout: 0

Keepalive timeout: 0, keepalive probe: 0, Keepalive timeout, so connections disconnected : 0

Initiated connections: 0, accepted connections: 0, established connections: 0

Closed connections: 0 (dropped: 0, initiated dropped: 0)

Packets dropped with MD5 authentication: 0

Packets permitted with MD5 authentication: 0

Table 10 Command output

Field	Description
Received packets	Statistics of received packets: · Total—Total number of received packets. · packets in sequence—Number of packets received in sequence. · window probe packets—Number of window probe packets. · window update packets—Number of window size update packets. · checksum error—Number of packets with checksum errors. · offset error—Number of packets with offset errors. · short error—Number of packets whose total length is less than that specified by the packet header. · duplicate packets—Number of duplicate packets. · partially duplicate packets—Number of partially duplicate packets. · out-of-order packets—Number of out-of-order packets. · packets with data after window—Number of packets exceeding the size of the receiving window. · packets after close—Number of packets received after the connection is closed. · ACK packets—Number of ACK packets. · duplicate ACK packets—Number of duplicate ACK packets. · too much ACK packets—Number of excessive ACK packets.
Sent packets	Statistics of sent packets: · Total—Total number of packets. · urgent packets—Number of packets containing an urgent indicator. · control packets—Number of control packets. · window probe packets—Number of window probe packets. · window update packets—Number of window update packets. · data packets—Number of data packets. · data packets retransmitted—Number of retransmitted packets. · ACK only packets—Number of ACK packets.
Retransmitted timeout	Number of packets whose retransmission times out.
connections dropped in retransmitted timeout	Number of connections dropped because of retransmission timeout.
Keepalive timeout	Number of keepalive timeouts.
keepalive probe	Number of keepalive probes.
Keepalive timeout, so connections disconnected	Number of connections dropped because of keepalive response timeout.
Initiated connections	Number of initiated connections.
accepted connections	Number of accepted connections.
established connections	Number of established connections.
Closed connections	Number of closed connections.
dropped	Number of dropped connections (after SYN is received from the peer).
initiated dropped	Number of initiated but dropped connections (before SYN is received from the peer).
Packets dropped with MD5 authentication	Number of packets that fail the MD5 authentication and are dropped.
Packets permitted with MD5 authentication	Number of packets that pass the MD5 authentication.

display tcp ipv6 status

Use display tcp ipv6 status to display the IPv6 TCP connection status, including the IPv6 TCP control block address, local and peer IPv6 addresses, and status of the IPv6 TCP connection.

Syntax

display tcp ipv6 status [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Examples

# Display the IPv6 TCP connection status.

<Sysname> display tcp ipv6 status

*: TCP6 MD5 Connection

TCP6CB Local Address Foreign Address State

045d8074 ::->21 ::->0 Listening

Table 11 Command output

Field	Description
*: TCP6 MD5 Connection	The asterisk (*) indicates that the TCP6 connection is secured with MD5 authentication.
TCP6CB	IPv6 TCP control block address (in hexadecimal).
Local Address	Local IPv6 address.
Foreign Address	Remote IPv6 address.
State	IPv6 TCP connection status: · Closed. · Listening. · Syn_Sent. · Syn_Rcvd. · Established. · Close_Wait. · Fin_Wait1. · Closing. · Last_Ack. · Fin_Wait2. · Time_Wait.

display udp ipv6 statistics

Use display udp ipv6 statistics to display the statistics of IPv6 UDP packets.

Syntax

display udp ipv6 statistics [ | { begin | exclude | include } regular-expression ]

Views

Any view

Default command level

1: Monitor level

Parameters

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Usage guidelines

You can use the reset udp ipv6 statistics command to clear the statistics of all IPv6 UDP packets.

Examples

# Display the statistics of IPv6 UDP packets.

<Sysname> display udp ipv6 statistics

Received packets:

Total: 0

checksum error: 0

shorter than header: 0, data length larger than packet: 0

unicast(no socket on port): 0

broadcast/multicast(no socket on port): 0

not delivered, input socket full: 0

input packets missing pcb cache: 0

Sent packets:

Total: 0

Table 12 Command output

Field	Description
Total	Total number of received/sent packets.
checksum error	Total number of packets with a checksum error.
shorter than header	Total number of IPv6 UDP packets whose total length is less than that specified by the packet header.
data length larger than packet	Total number of packets whose data length exceeds that specified by the packet header.
unicast(no socket on port)	Total number of received unicast packets without any socket.
broadcast/multicast(no socket on port)	Total number of received broadcast/multicast packets without any socket.
not delivered, input socket full	Number of packets not handled because the receive buffer is full.
input packet missing pcb cache	Number of packets that fail to match the protocol control block cache.

ipv6

Use ipv6 to enable IPv6.

Use undo ipv6 to disable IPv6.

Syntax

ipv6

undo ipv6

Default

IPv6 is disabled.

Views

System view

Default command level

2: System level

Examples

# Enable IPv6.

<Sysname> system-view

[Sysname] ipv6

ipv6 address

Use ipv6 address to configure an IPv6 global unicast address for an interface.

Use undo ipv6 address to remove the IPv6 address from the interface.

Syntax

ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length }

undo ipv6 address [ ipv6-address prefix-length | ipv6-address/prefix-length ]

Default

No global unicast address is configured for an interface.

Views

Interface view

Default command level

2: System level

Parameters

ipv6-address: Specifies the IPv6 address.

prefix-length: Specifies the Prefix length of the IPv6 address, in the range of 1 to 128.

Usage guidelines

Except for the link-local address automatically obtained and the link-local address generated through stateless autoconfiguration, all IPv6 addresses are removed from the interface if the undo ipv6 address command is executed without any parameter specified.

Examples

# Set the IPv6 global unicast address of VLAN-interface 100 to 2001::1 with prefix length 64.

Method 1:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1/64

Method 2:

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1 64

ipv6 address prefix-number

Use ipv6 address prefix-number to apply a prefix to generate an IPv6 address. The IPv6 address of an interface comprises the specified prefix, sub-prefix bit, and host bit.

Use undo ipv6 address prefix-number to remove an IPv6 address generated with an applied prefix.

Syntax

ipv6 address prefix-number sub-prefix/prefix-length

undo ipv6 address prefix-number

Default

No prefix is applied for IPv6 address generation on an interface.

Views

Interface view

Default command level

2: System level

Parameters

prefix-number: Specifies an IPv6 prefix by its ID in the range of 1 to 1024.

sub-prefix/prefix-length: Specifies the sub-prefix bit and host bit for an IPv6 address, and specifies the prefix length. The value range for prefix length is 1 to 128.

Usage guidelines

A maximum of one IPv6 address can be generated with the applied IPv6 prefix for an interface. You cannot execute the ipv6 address prefix-number command multiple times on the interface to modify the prefix.

Examples

# Create IPv6 prefix AAAA::/16 and assign ID 1 to the prefix. Apply the prefix to VLAN-interface 100 to generate an IPv6 address, set sub-prefix bit and host bit to BBBB:CCCC:DDDD::10, and the prefix length to 32. The generated address for the interface is AAAA:CCCC:DDDD::10/32.

<Sysname> system-view

[Sysname] ipv6 prefix 1 AAAA::/16

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 1 BBBB:CCCC:DDDD::10/32

ipv6 address anycast

Use ipv6 address anycast to configure an IPv6 anycast address for an interface.

Use undo ipv6 address anycast to remove the IPv6 anycast address from the interface.

Syntax

ipv6 address ipv6-address/prefix-length anycast

undo ipv6 address ipv6-address/prefix-length anycast

Default

No IPv6 anycast address is configured for an interface.

Views

Interface view

Default command level

2: System level

Parameters

ipv6-address/prefix-length: Specifies an IPv6 anycast address and its prefix length. The value range for prefix length is 1 to 128.

Examples

# Set the IPv6 anycast address of VLAN-interface 100 to 2001::1 with prefix length 64.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1/64 anycast

ipv6 address auto link-local

Use ipv6 address auto link-local to automatically generate a link-local address for an interface.

Use undo ipv6 address auto link-local to remove the automatically generated link-local address for the interface.

Syntax

ipv6 address auto link-local

undo ipv6 address auto link-local

Default

No link-local address is configured on an interface, and a link-local address is automatically generated after an IPv6 global unicast address is configured for the interface.

Views

Interface view

Default command level

2: System level

Usage guidelines

After an IPv6 global unicast address is configured for an interface, a link-local address is generated automatically. The automatically generated link-local address is the same as the one generated by using the ipv6 address auto link-local command.

The undo ipv6 address auto link-local command can only remove the link-local addresses generated through the ipv6 address auto link-local command. After the undo ipv6 address auto link-local command is used on an interface that has an IPv6 global unicast address configured, the interface still has a link-local address. If the interface has no IPv6 global unicast address configured, it has no link-local address.

Manual assignment takes precedence over automatic generation. If you first adopt automatic generation and then manual assignment, the manually assigned link-local address overwrites the automatically generated address. If you first use manual assignment and then automatic generation, the automatically generated link-local address does not take effect and the link-local address of an interface is still the manually assigned address. If you delete the manually assigned address, the automatically generated link-local address becomes effective. For more information about manual assignment of an IPv6 link-local address, see the ipv6 address link-local command.

Examples

# Configure VLAN-interface 100 to automatically generate a link-local address.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address auto link-local

ipv6 address eui-64

Use ipv6 address eui-64 to configure an EUI-64 IPv6 address for an interface.

Use undo ipv6 address eui-64 to remove the configured EUI-64 IPv6 address for the interface.

Syntax

ipv6 address ipv6-address/prefix-length eui-64

undo ipv6 address ipv6-address/prefix-length eui-64

Default

No EUI-64 IPv6 address is configured for an interface.

Views

Interface view

Default command level

2: System level

Parameters

ipv6-address/prefix-length: IPv6 address and IPv6 prefix length. The ipv6-address and prefix-length arguments jointly specify the prefix of an EUI-64 IPv6 address.

Usage guidelines

An EUI-64 IPv6 address is generated based on the specified prefix and the automatically generated interface identifier, and can be displayed by using the display ipv6 interface command.

The prefix length of an EUI-64 IPv6 address cannot be greater than 64.

Examples

# Configure an EUI-64 IPv6 address for VLAN-interface 100. The prefix length of the address is the same as that of 2001::1/64, and the interface ID is generated based on the MAC address of the device.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address 2001::1/64 eui-64

ipv6 address link-local

Use ipv6 address link-local to configure a link-local address for the interface.

Use undo ipv6 address link-local to remove the configured link-local address for the interface.

Syntax

ipv6 address ipv6-address link-local

undo ipv6 address ipv6-address link-local

Views

Interface view

Default command level

2: System level

Parameters

ipv6-address: IPv6 link-local address. The first 10 bits of an address must be 1111111010 (binary). The first group of hexadecimals in the address must be in the range of FE80 to FEBF.

Usage guidelines

Manual assignment takes precedence over automatic generation. If you first adopt automatic generation and then manual assignment, the manually assigned link-local address overwrites the automatically generated one. If you first adopt manual assignment and then automatic generation, the automatically generated link-local address does not take effect and the link-local address of an interface is still the manually assigned one. If you delete the manually assigned address, the automatically generated link-local address becomes effective. For information about automatic generation of an IPv6 link-local address, see the ipv6 address auto link-local command.

Examples

# Configure a link-local address for VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 address fe80::1 link-local

ipv6 fib-loadbalance-type hash-based

Use ipv6 fib-loadbalance-type hash-based to enable load sharing based on the HASH algorithm for packet forwarding.

Use undo ipv6 fib-loadbalance-type hash-based to restore the default.

Syntax

ipv6 fib-loadbalance-type hash-based

undo ipv6 fib-loadbalance-type hash-based

Default

Load sharing based on polling is adopted. ECMP routes are used in turn to forward packets.

Views

System view

Default command level

2: System level

Examples

# Enable load sharing based on the HASH algorithm for packet forwarding.

<Sysname> system-view

[Sysname] ipv6 fib-loadbalance-type hash-based

ipv6 hoplimit-expires enable

Use ipv6 hoplimit-expires enable to enable sending ICMPv6 Time Exceeded messages.

Use undo ipv6 hoplimit-expires to disable sending ICMPv6 Time Exceeded messages.

Syntax

ipv6 hoplimit-expires enable

undo ipv6 hoplimit-expires

Default

Sending ICMPv6 Time Exceeded messages is enabled.

Views

System view

Default command level

2: System level

Usage guidelines

After you disable sending ICMPv6 Time Exceeded messages, the device still sends Fragment Reassembly Time Exceeded messages.

Examples

# Disable sending ICMPv6 Time Exceeded messages.

<Sysname> system-view

[Sysname] undo ipv6 hoplimit-expires

ipv6 icmp-error

Use ipv6 icmp-error to configure the size and update interval of the token bucket.

Use undo ipv6 icmp-error to restore the defaults.

Syntax

ipv6 icmp-error { bucket bucket-size | ratelimit interval } *

undo ipv6 icmp-error

Default

The size is 10 and the update interval is 100 milliseconds. A maximum of 10 ICMPv6 error messages can be sent within 100 milliseconds.

Views

System view

Default command level

2: System level

Parameters

bucket bucket-size: Specifies the number of tokens in the token bucket, in the range of 1 to 200.

ratelimit interval: Specifies the update interval of the token bucket in milliseconds, in the range of 0 to 2147483647. The update interval of 0 indicates that the number of ICMPv6 error messages sent is not restricted.

Examples

# Set the capacity of the token bucket to 50 and the update interval to 100 milliseconds.

<Sysname> system-view

[Sysname] ipv6 icmp-error bucket 50 ratelimit 100

ipv6 icmpv6 multicast-echo-reply enable

Use ipv6 icmpv6 multicast-echo-reply enable to enable replying to multicast echo requests.

Use undo ipv6 icmpv6 multicast-echo-reply to disable replying to multicast echo requests.

Syntax

ipv6 icmpv6 multicast-echo-reply enable

undo ipv6 icmpv6 multicast-echo-reply

Default

The device is disabled from replying to multicast echo requests.

Views

System view

Default command level

2: System level

Examples

# Enable replying to multicast echo requests.

<Sysname> system-view

[Sysname] ipv6 icmpv6 multicast-echo-reply enable

ipv6 nd autoconfig managed-address-flag

Use ipv6 nd autoconfig managed-address-flag to set the managed address configuration (M) flag to 1 so that the host can acquire an IPv6 address through stateful autoconfiguration (for example, from a DHCP server).

Use undo ipv6 nd autoconfig managed-address-flag to restore the default.

Syntax

ipv6 nd autoconfig managed-address-flag

undo ipv6 nd autoconfig managed-address-flag

Default

The M flag is set to 0 so that the host can acquire an IPv6 address through stateless autoconfiguration.

Views

Interface view

Default command level

2: System level

Examples

# Configure the host to acquire an IPv6 address through stateful autoconfiguration.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd autoconfig managed-address-flag

ipv6 nd autoconfig other-flag

Use ipv6 nd autoconfig other-flag to set the other stateful configuration flag (O) to 1 so that the host can acquire information other than IPv6 address through stateful autoconfiguration (for example, from a DHCP server).

Use undo ipv6 nd autoconfig other-flag to restore the default.

Syntax

ipv6 nd autoconfig other-flag

undo ipv6 nd autoconfig other-flag

Default

The O flag is set to 0 so that the host can acquire other information through stateless autoconfiguration.

Views

Interface view

Default command level

2: System level

Examples

# Configure the host to acquire information other than IPv6 address through stateless autoconfiguration.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] undo ipv6 nd autoconfig other-flag

ipv6 nd dad attempts

Use ipv6 nd dad attempts to configure the number of attempts to send an NS message for DAD.

Use undo ipv6 nd dad attempts to restore the default.

Syntax

ipv6 nd dad attempts value

undo ipv6 nd dad attempts

Default

The number of attempts to send an NS message for DAD is 1.

Views

Interface view

Default command level

2: System level

Parameters

value: Number of attempts to send an NS message for DAD, in the range of 0 to 600. The default value is 1. To disable DAD, set the value to 0.

Examples

# Set the number of attempts to send an NS message for DAD to 20.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd dad attempts 20

Related commands

display ipv6 interface

ipv6 nd hop-limit

Use ipv6 nd hop-limit to configure the hop limit advertised by the device.

Use undo ipv6 nd hop-limit to restore the default hop limit.

Syntax

ipv6 nd hop-limit value

undo ipv6 nd hop-limit

Default

The hop limit advertised by the device is 64.

Views

System view

Default command level

2: System level

Parameters

value: Specifies the number of hops, in the range of 0 to 255. When it is set to 0, the Hop Limit field in RA messages sent by the device is 0. The number of hops is determined by the requesting device itself.

Examples

# Set the hop limit advertised by the device to 100.

<Sysname> system-view

[Sysname] ipv6 nd hop-limit 100

ipv6 nd ns retrans-timer

Use ipv6 nd ns retrans-timer to set the interval for retransmitting an NS message. The local interface retransmits an NS message at intervals of this value. The Retrans Timer field in RA messages sent by the local interface is equal to this value.

Use undo ipv6 nd ns retrans-timer to restore the default.

Syntax

ipv6 nd ns retrans-timer value

undo ipv6 nd ns retrans-timer

Default

The local interface sends NS messages at an interval of 1000 millisecond and the Retrans Timer field in the RA messages sent is 0, so the interval for retransmitting an NS message is determined by the receiving device.

Views

Interface view

Default command level

2: System level

Parameters

value: Interval for retransmitting an NS message in milliseconds, in the range of 1000 to 4294967295.

Examples

# Specify VLAN-interface 100 to retransmit NS messages at intervals of 10000 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ns retrans-timer 10000

Related commands

display ipv6 interface

ipv6 nd nud reachable-time

Use ipv6 nd nud reachable-time to configure the neighbor reachable time on an interface. This time value serves as not only the neighbor reachable time on the local interface, but also the value of the Reachable Time field in RA messages sent by the local interface.

Use undo ipv6 nd nud reachable-time to restore the default.

Syntax

ipv6 nd nud reachable-time value

undo ipv6 nd nud reachable-time

Default

The neighbor reachable time on the local interface is 30000 milliseconds and the value of the Reachable Time field in RA messages is 0, so the reachable time is determined by the receiving device.

Views

Interface view

Default command level

2: System level

Parameters

value: Neighbor reachable time in milliseconds, in the range of 1 to 3600000.

Examples

# Set the neighbor reachable time on VLAN-interface 100 to 10,000 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd nud reachable-time 10000

Related commands

display ipv6 interface

ipv6 nd ra halt

Use ipv6 nd ra halt to enable RA message suppression.

Use undo ipv6 nd ra halt to disable RA message suppression.

Syntax

ipv6 nd ra halt

undo ipv6 nd ra halt

Default

RA messages are suppressed.

Views

Interface view

Default command level

2: System level

Examples

# Suppress RA messages on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra halt

ipv6 nd ra interval

Use ipv6 nd ra interval to set the maximum and minimum intervals for advertising RA messages. The device advertises RA messages at intervals that are a random value between the maximum interval and the minimum interval.

Use undo ipv6 nd ra interval to restore the default.

Syntax

ipv6 nd ra interval max-interval-value min-interval-value

undo ipv6 nd ra interval

Default

The maximum interval between RA messages is 600 seconds, and the minimum interval is 200 seconds.

Views

Interface view

Default command level

2: System level

Parameters

max-interval-value: Maximum interval for advertising RA messages in seconds, in the range of 4 to 1800.

min-interval-value: Minimum interval for advertising RA messages in seconds, in the range of 3 to 1350.

Usage guidelines

The minimum interval should be three-fourths of the maximum interval or less.

The maximum interval for sending RA messages should be less than or equal to the router lifetime in RA messages.

Examples

# Set the maximum interval for advertising RA messages to 1000 seconds and the minimum interval to 700 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra interval 1000 700

ipv6 nd ra no-advlinkmtu

Use ipv6 nd ra no-advlinkmtu to turn off the MTU option in RA messages.

Use undo ipv6 nd ra no-advlinkmtu to restore the default.

Syntax

ipv6 nd ra no-advlinkmtu

undo ipv6 nd ra no-advlinkmtu

Default

RA messages contain the MTU option.

Views

Interface view

Default command level

2: System level

Examples

# Turn off the MTU option in RA messages on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra no-advlinkmtu

ipv6 nd ra prefix

Use ipv6 nd ra prefix to configure the prefix information in RA messages.

Use undo ipv6 nd ra prefix to remove the prefix information from RA messages.

Syntax

ipv6 nd ra prefix { ipv6-prefix prefix-length | ipv6-prefix/prefix-length } valid-lifetime preferred-lifetime [ no-autoconfig | off-link ] *

undo ipv6 nd ra prefix { ipv6-prefix | ipv6-prefix/prefix-length }

Default

No prefix information is configured in RA messages, and the IPv6 address of the interface sending RA messages is used as the prefix information with a valid lifetime of 2592000 seconds (30 days) and a preferred lifetime of 604800 seconds (7 days).

Views

Interface view

Default command level

2: System level

Parameters

ipv6-prefix: IPv6 prefix.

prefix-length: Prefix length of the IPv6 address.

valid-lifetime: Valid lifetime of a prefix in seconds, in the range of 0 to 4294967295.

preferred-lifetime: Preferred lifetime of a prefix used for stateless autoconfiguration in seconds, in the range of 0 to 4294967295.

no-autoconfig: Excludes the prefix from stateless autoconfiguration. If this keyword is not provided, the prefix is used for stateless autoconfiguration.

off-link: Indicates that the address with the prefix is not directly reachable on the link. If this keyword is not provided, the address with the prefix is directly reachable on the link.

Examples

# Configure the prefix information about RA messages on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra prefix 2001:10::100/64 100 10

ipv6 nd ra router-lifetime

Use ipv6 nd ra router-lifetime to configure the router lifetime in RA messages.

Use undo ipv6 nd ra router-lifetime to restore the default.

Syntax

ipv6 nd ra router-lifetime value

undo ipv6 nd ra router-lifetime

Default

The router lifetime in RA messages is 1800 seconds.

Views

Interface view

Default command level

2: System level

Parameters

value: Router lifetime in seconds, in the range of 0 to 9000. When the value is 0, the device does not serve as the default router.

Usage guidelines

The router lifetime in RA messages should be greater than or equal to the advertising interval.

Examples

# Set the router lifetime in RA messages on VLAN-interface 100 to 1000 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 nd ra router-lifetime 1000

ipv6 neighbor

Use ipv6 neighbor to configure a static neighbor entry.

Use undo ipv6 neighbor to remove a static neighbor entry.

Syntax

ipv6 neighbor ipv6-address mac-address { vlan-id port-type port-number | interface interface-type interface-number }

undo ipv6 neighbor ipv6-address interface-type interface-number

undo ipv6 neighbor ipv6-address mac-address { vlan-id port-type port-number | interface interface-type interface-number }

Views

System view

Default command level

2: System level

Parameters

ipv6-address: IPv6 address of the static neighbor entry.

mac-address: MAC address of the static neighbor entry (48 bits long in the format of H-H-H).

vlan-id: VLAN ID of the static neighbor entry, in the range of 1 to 4094.

port-type port-number: Type and number of a Layer 2 port of the static neighbor entry.

interface interface-type interface-number: Type and number of a Layer 3 interface of the static neighbor entry.

Usage guidelines

You can use a Layer 3 VLAN interface or a Layer 2 port in the VLAN to configure a static neighbor entry.

· If the first method is used, the neighbor entry is in INCMP state. After the device obtains the corresponding Layer 2 port information, the neighbor entry goes into REACH state.

· If the second method is used, the corresponding VLAN interface must exist and the port specified by port-type port-number must belong to the VLAN specified by vlan-id. After the static neighbor entry is configured, the device associates the VLAN interface with the IPv6 address to uniquely identify the static neighbor entry and the entry is in REACH state.

To remove a static neighbor entry, specify the VLAN interface and the neighbor address.

Examples

# Configure a static neighbor entry for Layer 2 port Ten-GigabitEthernet 1/0/1 of VLAN 100.

<Sysname> system-view

[Sysname] ipv6 neighbor 2000::1 fe-e0-89 100 Ten-GigabitEthernet 1/0/1

Related commands

display ipv6 neighbors

ipv6 neighbor stale-aging

Use ipv6 neighbor stale-aging to set the aging timer for ND entries in stale state.

Use undo ipv6 neighbor stale-aging to restore the default.

Syntax

ipv6 neighbor stale-aging aging-time

undo ipv6 neighbor stale-aging

Default

The aging timer for ND entries in stale state is four hours.

Views

System view

Default command level

2: System level

Parameters

aging-time: Specifies the aging timer for ND entries in stale state. The value range is 1 to 24 hours.

Examples

# Set the aging timer for ND entries in stale state to two hours.

<Sysname> system-view

[Sysname] ipv6 neighbor stale-aging 2

ipv6 neighbors max-learning-num

Use ipv6 neighbors max-learning-num to set the maximum number of dynamic neighbor entries that can be learned by the interface.

Use undo ipv6 neighbors max-learning-num to restore the default.

Syntax

ipv6 neighbors max-learning-num number

undo ipv6 neighbors max-learning-num

Default

A Layer 2 interface does not limit the number of dynamic neighbor entries that can be learned. The maximum number of dynamic neighbor entries that a Layer 3 interface can learn varies with devices. For more information, see About the H3C Access Controllers Command References.

Views

Interface view

Default command level

2: System level

Parameters

number: Specifies the maximum number of dynamic neighbor entries that can be learned by the interface. The value range varies with devices. For more information, see About the H3C Access Controllers Command References.

Examples

# Set the maximum number of dynamic neighbor entries that can be learned by VLAN-interface 100 to 10.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] ipv6 neighbors max-learning-num 10

ipv6 pathmtu

Use ipv6 pathmtu to configure a static path MTU for a specific IPv6 address.

Use undo ipv6 pathmtu to remove the path MTU configuration for a specific IPv6 address.

Syntax

ipv6 pathmtu ipv6-address [ value ]

undo ipv6 pathmtu ipv6-address

Default

No static path MTU is configured.

Views

System view

Default command level

2: System level

Parameters

ipv6-address: IPv6 address.

value: Path MTU of a specific IPv6 address in bytes. The value range is 1280 to 10000, and the default is 1500.

Examples

# Configure a static path MTU for a specific IPv6 address.

<Sysname> system-view

[Sysname] ipv6 pathmtu fe80::12 1300

ipv6 pathmtu age

Use ipv6 pathmtu age to configure the aging time for a dynamic path MTU.

Use undo ipv6 pathmtu age to restore the default.

Syntax

ipv6 pathmtu age age-time

undo ipv6 pathmtu age

Default

The aging time is 10 minutes.

Views

System view

Default command level

2: System level

Parameters

age-time: Aging time for path MTU in minutes, in the range of 10 to 100.

Usage guidelines

The aging time is invalid for a static path MTU.

Examples

# Set the aging time for a dynamic path MTU to 40 minutes.

<Sysname> system-view

[Sysname] ipv6 pathmtu age 40

Related commands

display ipv6 pathmtu

ipv6 prefix

Use ipv6 prefix to create a static IPv6 prefix.

Use undo ipv6 prefix to remove the specified static IPv6 prefix.

Syntax

ipv6 prefix prefix-number ipv6-prefix/prefix-length

undo ipv6 prefix prefix-number

Default

No static IPv6 prefix is specified.

Views

System view

Default command level

2: System level

Parameters

prefix-number: Specifies a prefix ID in the range of 1 to 1024.

ipv6-prefix/prefix-length: Specifies a prefix and the prefix length. The value range for the prefix-length argument is 1 to 128.

Usage guidelines

You cannot execute the ipv6 prefix command to modify an existing static prefix.

When a DHCPv6 client obtains an IPv6 prefix from a DHCP server, the IPv6 prefix is dynamically generated. You cannot modify or remove the dynamically generated prefix.

The prefix IDs of a static IPv6 prefix and a dynamical IPv6 prefix cannot be the same.

Examples

# Create static IPv6 prefix 2001:0410::/32 with prefix ID 1.

<Sysname> system-view

[Sysname] ipv6 prefix 1 2001:0410::/32

Related commands

display ipv6 prefix

ipv6 redirects enable

Use ipv6 redirects enable to enable sending ICMPv6 redirect messages.

Use undo ipv6 redirects to disable sending ICMPv6 redirect messages.

Syntax

ipv6 redirects enable

undo ipv6 redirects

Default

Sending ICMPv6 redirect messages is disabled.

Views

System view

Default command level

System level

Examples

# Enable sending ICMPv6 redirect messages.

<Sysname> system-view

[Sysname] ipv6 redirects enable

ipv6 unreachables enable

Use ipv6 unreachables enable to enable sending ICMPv6 destination unreachable messages.

Use undo ipv6 unreachables to disable sending ICMPv6 destination unreachable messages.

Syntax

ipv6 unreachables enable

undo ipv6 unreachables

Default

Sending ICMPv6 destination unreachable messages is disabled.

Views

System view

Default command level

2: System level

Examples

# Enable sending ICMPv6 destination unreachable messages.

<Sysname> system-view

[Sysname] ipv6 unreachables enable

reset ipv6 neighbors

Use reset ipv6 neighbors to clear IPv6 neighbor information.

Syntax

reset ipv6 neighbors { all | dynamic | interface interface-type interface-number | static }

Views

User view

Default command level

2: System level

Parameters

all: Clears static and dynamic neighbor information on all interfaces.

dynamic: Clears dynamic neighbor information on all interfaces.

interface interface-type interface-number: Clears dynamic neighbor information on a specific interface.

static: Clears static neighbor information on all interfaces.

Usage guidelines

You can use the display ipv6 neighbors command to display the current IPv6 neighbor information.

Examples

# Clear neighbor information on all interfaces.

<Sysname> reset ipv6 neighbors all

% Info: This will delete all the entries. Continue? [Y/N]: y

# Clear dynamic neighbor information on all interfaces.

<Sysname> reset ipv6 neighbors dynamic

% Info: This will delete all the dynamic entries. Continue? [Y/N]: y

reset ipv6 pathmtu

Use reset ipv6 pathmtu to clear path MTU information.

Syntax

reset ipv6 pathmtu { all | static | dynamic }

Views

User view

Default command level

2: System level

Parameters

all: Clears all path MTUs.

static: Clears all static path MTUs.

dynamic: Clears all dynamic path MTUs.

Examples

# Clear all path MTUs.

<Sysname> reset ipv6 pathmtu all

reset ipv6 statistics

Use reset ipv6 statistics to clear the statistics of IPv6 packets and ICMPv6 packets.

Syntax

reset ipv6 statistics

Views

User view

Default command level

1: Monitor level

Parameters

None

Usage guidelines

You can use the display ipv6 statistics command to display the statistics of IPv6 and ICMPv6 packets.

Examples

# Clear the statistics of IPv6 packets and ICMPv6 packets.

<Sysname> reset ipv6 statistics

reset tcp ipv6 statistics

Use reset tcp ipv6 statistics to clear the statistics of all IPv6 TCP connections.

Syntax

reset tcp ipv6 statistics

Views

User view

Default command level

1: Monitor level

Usage guidelines

You can use the display tcp ipv6 statistics command to display the statistics of IPv6 TCP connections.

Examples

# Clear the statistics of all IPv6 TCP connections.

<Sysname> reset tcp ipv6 statistics

reset udp ipv6 statistics

Use reset udp ipv6 statistics to clear the statistics of all IPv6 UDP packets.

Syntax

reset udp ipv6 statistics

Views

User view

Default command level

1: Monitor level

Usage guidelines

You can use the display udp ipv6 statistics command to display the statistics of IPv6 UDP packets.

Examples

# Clear the statistics of all IPv6 UDP packets.

<Sysname> reset udp ipv6 statistics

tcp ipv6 timer fin-timeout

Use tcp ipv6 timer fin-timeout to set the finwait timer for IPv6 TCP connections.

Use undo tcp ipv6 timer fin-timeout to restore the default.

Syntax

tcp ipv6 timer fin-timeout wait-time

undo tcp ipv6 timer fin-timeout

Default

The finwait timer is 675 seconds.

Views

System view

Default command level

2: System level

Parameters

wait-time: Sets the finwait timer for IPv6 TCP connections in seconds, in the range of 76 to 3600.

Examples

# Set the finwait timer of IPv6 TCP connections to 800 seconds.

<Sysname> system-view

[Sysname] tcp ipv6 timer fin-timeout 800

tcp ipv6 timer syn-timeout

Use tcp ipv6 timer syn-timeout to set the synwait timer for IPv6 TCP connections

Use undo tcp ipv6 timer syn-timeout to restore the default.

Syntax

tcp ipv6 timer syn-timeout wait-time

undo tcp ipv6 timer syn-timeout

Default

The synwait timer of IPv6 TCP connections is 75 seconds.

Views

System view

Default command level

2: System level

Parameters

wait-time: Sets the synwait timer for IPv6 TCP connections in seconds, in the range of 2 to 600.

Examples

# Set the synwait timer of IPv6 TCP connections to 100 seconds.

<Sysname> system-view

[Sysname] tcp ipv6 timer syn-timeout 100

tcp ipv6 window

Use tcp ipv6 window to set the size of the IPv6 TCP send/receive buffer.

Use undo tcp ipv6 window to restore the default.

Syntax

tcp ipv6 window size

undo tcp ipv6 window

Default

The size of the IPv6 TCP send/receive buffer is 8 KB.

Views

System view

Default command level

2: System level

Parameters

size: Size of the IPv6 TCP send/receive buffer in KB, in the range of 1 to 32.

Examples

# Set the size of the IPv6 TCP send/receive buffer to 4 KB.

<Sysname> system-view

[Sysname] tcp ipv6 window 4

04-Layer 3 Command Reference

ipv6 nd ra interval

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