Field	Description
current state	Current physical state of an interface
Line protocol current state	Current state of the network layer protocol
Internet Address	IP address of an interface followed by: l Primary: Identifies a primary IP address, or l Sub: Identifies a secondary IP address.
Broadcast address	Broadcast address of the subnet attached to an interface
The Maximum Transmit Unit	Maximum transmission units on an interface
input packets : 0, bytes : 0, multicasts : 0 output packets : 0, bytes : 0, multicasts : 0	Unicast packets, bytes, and multicast packets received on an interface Unicast packets, bytes, and multicast packets sent on an interface
ARP packet input number: 0 Request packet: 0 Reply packet: 0 Unknown packet: 0	Total number of ARP packets received on an interface, including l ARP request packets l ARP reply packets l Unknown packets
TTL invalid packet number	Number of TTL-invalid packets received on an interface
ICMP packet input number: 0 Echo reply: 0 Unreachable: 0 Source quench: 0 Routing redirect: 0 Echo request: 0 Router advert: 0 Router solicit: 0 Time exceed: 0 IP header bad: 0 Timestamp request: 0 Timestamp reply: 0 Information request: 0 Information reply: 0 Netmask request: 0 Netmask reply: 0 Unknown type: 0	Total number of ICMP packets received on an interface, including the following packets: l Echo reply packet l Unreachable packets l Source quench packets l Routing redirect packets l Echo request packets l Router advertisement packets l Router solicitation packets l Time exceeded packets l IP header bad packets l Timestamp request packets l Timestamp reply packets l Information request packets l Information reply packets l Netmask request packets l Netmask reply packets l Unknown type packets
DHCP packet deal mode	DHCP packet processing mode. This field appears on a DHCP-supporting device and can be one of the following values: l global: The DHCP server with the global address pool is enabled on the interface. l relay: The DHCP relay agent is enabled on the interface.

1.1.2 display ip interface brief

Syntax

display ip interface brief [ interface-type [ interface-number ] ]

View

Any view

Parameters

interface-type: Interface type.

interface-number: Interface number.

Description

Use the display ip interface brief command to display brief information about a specified or all layer 3 interfaces.

Without the interface type and interface number specified, the information about all layer 3 interfaces is displayed; with only the interface type specified, the information about all layer 3 interfaces of the specified type is displayed; with both the interface type and interface number specified, only the information about the specified interface is displayed.

Related commands: display ip interface.

Examples

# Display brief information about VLAN-interface 1.

<Sysname> display ip interface brief vlan-interface 1

*down: administratively down

(s): spoofing

Interface Physical Protocol IP Address

Vlan-interface1 up up 1.1.1.1

Table 1-2 Description on fields of the display ip interface brief command

Field	Description
*down	The interface is administratively shut down with the shutdown command.
(s)	Spoofing attribute of the interface. It indicates that an interface whose network layer protocol is displayed up may have no link present or the link is set up only on demand.
Interface	Interface name
Physical	Physical state of interface
Protocol	Network layer protocol state of interface
IP Address	IP address of interface (If no IP address is configured, “unassigned” is displayed.)

1.1.3 ip address

Syntax

ip address ip-address { mask | mask-length } [ sub ]

undo ip address [ ip-address { mask | mask-length } [ sub ] ]

View

Interface view

Parameters

ip-address: IP address of interface, in dotted decimal notation.

mask: Subnet mask in dotted decimal notation.

mask-length: Subnet mask length, the number of consecutive ones in the mask.

sub: Secondary IP address for the interface.

Description

Use the ip address command to assign an IP address and mask to the interface.

Use the undo ip address command to remove all IP addresses.

Use the undo ip address ip-address { mask | mask-length } command to remove the primary IP address.

Use the undo ip address ip-address { mask | mask-length } sub command to remove a secondary IP address.

By default, no IP address is assigned to any interface.

When assigning IP addresses to an interface, consider the following:

l You can assign only one primary IP address to an interface.

l The primary and secondary IP addresses can be located in the same network segment.

l Before removing the primary IP address, remove all secondary IP addresses.

l You cannot assign a secondary IP address to the interface that has been configured to obtain an IP address through BOOTP or DHCP.

Related commands: display ip interface.

Examples

# Assign VLAN-interface 1 a primary IP address and a secondary IP address, with subnet masks being 255.255.255.0.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface1] ip address 129.12.0.1 255.255.255.0

[Sysname-Vlan-interface1] ip address 202.38.160.1 255.255.255.0 sub

Chapter 2 IP Performance Configuration Commands

2.1 IP Performance Configuration Commands

2.1.1 display fib

Syntax

display fib [ | { begin | include | exclude } string | acl acl-number | ip-prefix ip-prefix-name ]

View

Any view

Parameters

| { begin | include | exclude } string: Displays FIB information in the buffer related to the specified string according to a regular expression.

l The begin keyword specifies to display from the first FIB entry that contains the specified string.

l The include keyword specifies to display only the FIB entries that include the specified string.

l The exclude keyword specifies to display only the FIB entries that do not include the specified string.

l The string argument is a case-sensitive string, containing 1 to 256 characters.

acl acl-number: Displays FIB information matching a specified ACL numbered from 2000 to 2999.

ip-prefix ip-prefix-name: Displays FIB information matching a specified IP prefix list, a string of 1 to 19 characters.

Description

Use the display fib command to display FIB forward information. If no parameters are specified, all FIB information will be displayed.

Examples

# Display all FIB information.

<Sysname> display fib

FIB Table:

Total number of Routes : 4

Flag:

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

R:Reject L:Generated by ARP or ESIS

Destination/Mask Nexthop Flag TimeStamp Interface Token

10.2.0.0/16 0.0.0.0 U t[1150900568] Vlan1 invalid

10.2.1.1/32 127.0.0.1 HU t[1150900568] InLoop0 invalid

127.0.0.0/8 127.0.0.1 U t[1150623094] InLoop0 invalid

127.0.0.1/32 127.0.0.1 HU t[1150623094] InLoop0 invalid

Table 2-1 Description on the fields of the display fib command

Field	Description
Total number of Routes	Total number of routes in the FIB table
Destination/Mask	Destination address/length of mask
Nexthop	Address of next hop
Flag	Flags of routes: l “U”—Usable route l “G”—Gateway route l “H”—Host route l “B”—Blackhole route l “D”—Dynamic route l “S”—Static route l “R”—Refused route l “L”—Route generated by ARP or ESIS
TimeStamp	Time stamp
Interface	Forward interface
Token	LSP index number

# Display FIB information passing ACL 2000

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule permit source 10.2.0.0 0.0.255.255

[Sysname-acl-basic-2000] display fib acl 2000

Route entry matched by access-list 2000:

Summary counts: 2

Flag:

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

R:Reject L:Generated by ARP or ESIS

Destination/Mask Nexthop Flag TimeStamp Interface Token

10.2.0.0/16 0.0.0.0 U t[1150900568] Vlan1 invalid

10.2.1.1/32 127.0.0.1 HU t[1150900568] InLoop0 invalid

# Display all entries that contain the string 127 and start from the first one.

<Sysname> display fib | begin 127

Flag:

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

R:Reject L:Generated by ARP or ESIS

Destination/Mask Nexthop Flag TimeStamp Interface Token

10.2.1.1/32 127.0.0.1 HU t[1150900568] InLoop0 invalid

127.0.0.0/8 127.0.0.1 U t[1150623094] InLoop0 invalid

127.0.0.1/32 127.0.0.1 HU t[1150623094] InLoop0 invalid

# Display FIB information passing the IP prefix list abc0

<Sysname> system-view

[Sysname] ip ip-prefix abc0 permit 10.2.0.0 16

[Sysname] display fib ip-prefix abc0

Route Entry matched by prefix-list abc0:

Summary count: 1

Flag:

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

R:Reject L:Generated by ARP or ESIS

Destination/Mask Nexthop Flag TimeStamp Interface Token

10.2.0.0/16 0.0.0.0 U t[1150900568] Vlan1 invalid

2.1.2 display fib ip-address

Syntax

display fib ip-address1 [ { mask1 | mask-length1 } [ ip-address2 { mask2 | mask-length2 } | longer ] | longer ]

View

Any view

Parameters

ip-address1, ip-address2: Destination IP address, in dotted decimal notation. ip-address1 and ip-address2 together determine an address range for the FIB entries to be displayed.

mask1, mask2: IP address mask.

mask-length1, mask-length2: Length of IP address mask.

longer: Displays FIB entries that match the specified address/mask and have masks longer than or equal to the mask that a user enters. If no masks are specified, FIB entries that match the natural network address and have the masks longer than or equal to the natural mask will be displayed.

Description

Use the display fib ip-address command to display FIB entries that match the specified destination IP address.

Examples

# Display the FIB entries that match the natural network of 10.1.0.0 and have the masks longer than or equal to the natural mask.

<Sysname> display fib 10.1.0.0 longer

Route Entry Count: 2

Flag:

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

R:Reject L:Generated by ARP or ESIS

Destination/Mask Nexthop Flag TimeStamp Interface Token

10.0.0.0/8 0.0.0.0 U t[1141140133] Vlan1 invalid

10.1.1.1/32 127.0.0.1 HU t[1141140133] InLoop0 invalid

For description about the above output, refer to Table 2-1.

2.1.3 display fib statistics

Syntax

display fib statistics

View

Any view

Parameters

None

Description

Use the display fib statistics command to display statistics about the FIB entries.

Examples

# View statistics about the FIB entries.

<Sysname> display fib statistics

Route Entry Count : 2

Table 2-2 Description on the fields of the display fib statistics command

Field	Description
Route Entry Count	Number of FIB entries

2.1.4 display icmp statistics

Syntax

display icmp statistics

View

Any view

Parameters

None

Description

Use the display icmp statistics command to display ICMP statistics.

Related commands: display ip interface, reset ip statistics.

Examples

# Display ICMP statistics.

<Sysname> display icmp statistics

Input: bad formats 0 bad checksum 0

echo 5 destination unreachable 0

source quench 0 redirects 0

echo reply 10 parameter problem 0

timestamp 0 information request 0

mask requests 0 mask replies 0

time exceeded 0

Output:echo 10 destination unreachable 0

source quench 0 redirects 0

echo reply 5 parameter problem 0

timestamp 0 information reply 0

mask requests 0 mask replies 0

time exceeded 0

Table 2-3 Description on the fields of the display icmp statistics command

Field	Description
bad formats	Number of input wrong format packets
bad checksum	Number of input wrong checksum packets
echo	Number of input/output echo packets
destination unreachable	Number of input/output destination unreachable packets
source quench	Number of input/output source quench packets
redirects	Number of input/output redirection packets
echo reply	Number of input/output replies
parameter problem	Number of input/output parameter problem packets
timestamp	Number of input/output time stamp packets
information request	Number of input information request packets
mask requests	Number of input/output mask requests
mask replies	Number of input/output mask replies
information reply	Number of output information reply packets
time exceeded	Number of input/output expiration packets

2.1.5 display ip socket

Syntax

display ip socket [ socktype sock-type ] [ task-id socket-id ]

View

Any view

Parameters

socktype sock-type: Displays the socket information of this type. The sock type is in the range 1 to 3, corresponding to TCP, UDP and raw IP respectively.

task-id: Displays the socket information of this task. Task ID is in the range 1 to 100.

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

Description

Use the display ip socket command to display socket information.

Examples

# Display all socket information.

<Sysname> display ip socket

SOCK_STREAM:

Task = VTYD(60), socketid = 1, Proto = 6,

LA = 0.0.0.0:23, FA = 0.0.0.0:0,

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

socket option = SO_ACCEPTCONN SO_KEEPALIVE SO_REUSEPORT SO_SENDVPNID(3073) SO_SETKEEPALIVE,

socket state = SS_PRIV SS_ASYNC

Task = HTTP(58), socketid = 1, Proto = 6,

LA = 0.0.0.0:80, FA = 0.0.0.0:0,

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

socket option = SO_ACCEPTCONN SO_REUSEPORT,

socket state = SS_PRIV SS_NBIO

Task = VTYD(60), socketid = 3, Proto = 6,

LA = 192.168.0.152:23, FA = 192.168.0.208:1099,

sndbuf = 8192, rcvbuf = 8192, sb_cc = 483, rb_cc = 0,

socket option = SO_KEEPALIVE SO_OOBINLINE SO_REUSEPORT SO_SENDVPNID(0) SO_SETKEEPALIVE,

socket state = SS_ISCONNECTED SS_PRIV SS_ASYNC

SOCK_DGRAM:

Task = AGNT(29), socketid = 1, Proto = 17,

LA = 0.0.0.0:161, FA = 0.0.0.0:0,

sndbuf = 9216, rcvbuf = 41600, sb_cc = 0, rb_cc = 0,

socket option = SO_UDPCHECKSUM SO_SENDVPNID(3073),

socket state = SS_PRIV SS_NBIO SS_ASYNC

Task = ROUT(86), socketid = 3, Proto = 17,

LA = 0.0.0.0:520, FA = 0.0.0.0:0,

sndbuf = 1024, rcvbuf = 256000, sb_cc = 0, rb_cc = 0,

socket option = SO_BROADCAST SO_REUSEPORT SO_UDPCHECKSUM SO_SETSRCADDR SO_SENDVPNID(0),

socket state = SS_PRIV SS_ASYNC

Task = RDSO(75), socketid = 1, Proto = 17,

LA = 0.0.0.0:1024, FA = 0.0.0.0:0,

sndbuf = 9216, rcvbuf = 41600, sb_cc = 0, rb_cc = 0,

socket option = SO_UDPCHECKSUM,

socket state = SS_PRIV

Task = TRAP(71), socketid = 1, Proto = 17,

LA = 0.0.0.0:1025, FA = 0.0.0.0:0,

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

socket option = SO_UDPCHECKSUM,

socket state = SS_PRIV

Task = RDSO(75), socketid = 2, Proto = 17,

LA = 0.0.0.0:1812, FA = 0.0.0.0:0,

sndbuf = 9216, rcvbuf = 41600, sb_cc = 0, rb_cc = 0,

socket option = SO_UDPCHECKSUM,

socket state = SS_PRIV

SOCK_RAW:

Task = ROUT(86), socketid = 2, Proto = 65,

LA = 0.0.0.0, FA = 0.0.0.0,

sndbuf = 32767, rcvbuf = 256000, sb_cc = 0, rb_cc = 0,

socket option = 0,

socket state = SS_PRIV SS_NBIO SS_ASYNC

Task = ROUT(86), socketid = 1, Proto = 2,

LA = 0.0.0.0, FA = 0.0.0.0,

sndbuf = 32767, rcvbuf = 256000, sb_cc = 0, rb_cc = 0,

socket option = SO_SENDVPNID(0) SO_RCVVPNID(0),

socket state = SS_PRIV SS_NBIO SS_ASYNC

Table 2-4 Description on the fields of the display ip socket command

Field	Description
SOCK_STREAM	TCP socket
SOCK_DGRAM	UDP socket
SOCK_RAW	raw IP socket
Task	Task number
socketid	Socket ID
Proto	Protocol number of the socket
LA	Local address and local port number
FA	Remote address and remote port number
sndbuf	sending buffer size of the socket
rcvbuf	receiving buffer size of the socket
sb_cc	Current data size in the sending buffer (It is available only for TCP that can buffer data)
rb_cc	Data size currently in the receiving buffer
socket option	Socket option
socket state	Socket state

2.1.6 display ip statistics

Syntax

display ip statistics

View

Any view

Parameters

None

Description

Use the display ip statistics command to display statistics of IP packets.

Related commands: display ip interface, reset ip statistics.

Examples

# Display statistics of IP packets.

<Sysname> display ip statistics

Input: sum 7120 local 112

bad protocol 0 bad format 0

bad checksum 0 bad options 0

Output: forwarding 0 local 27

dropped 0 no route 2

compress fails 0

Fragment:input 0 output 0

dropped 0

fragmented 0 couldn't fragment 0

Reassembling:sum 0 timeouts 0

Table 2-5 Description on the fields of the display ip statistics command

Field		Description
Input:	sum	Total number of packets received
	local	Total number of packets with destination being local
	bad protocol	Total number of unknown protocol packets
	bad format	Total number of packets with incorrect format
	bad checksum	Total number of packets with incorrect checksum
	bad options	Total number of packets with incorrect option
Output:	forwarding	Total number of packets forwarded
	local	Total number of packets sent from the local
	dropped	Total number of packets discarded
	no route	Total number of packets for which no route is available
	compress fails	Total number of packets failed to compress
Fragment:	input	Total number of fragments received
	output	Total number of fragments sent
	dropped	Total number of fragments dropped
	fragmented	Total number of packets successfully fragmented
	couldn't fragment	Total number of packets that failed to be fragmented
Reassembling	sum	Total number of packets reassembled
Reassembling	timeouts	Total number of reassembly timeout fragments

2.1.7 display tcp statistics

Syntax

display tcp statistics

View

Any view

Parameters

None

Description

Use the display tcp statistics command to display statistics of TCP traffic.

Related commands: display tcp status, reset tcp statistics.

Examples

# Display statistics of TCP traffic.

<Sysname> display tcp statistics

Received packets:

Total: 753

packets in sequence: 412 (11032 bytes)

window probe packets: 0, window update packets: 0

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

duplicate packets: 4 (88 bytes), partially duplicate packets: 5 (7 bytes)

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

packets of data after window: 0 (0 bytes)

packets received after close: 0

ACK packets: 481 (8776 bytes)

duplicate ACK packets: 7, too much ACK packets: 0

Sent packets:

Total: 665

urgent packets: 0

control packets: 5 (including 1 RST)

window probe packets: 0, window update packets: 2

data packets: 618 (8770 bytes) data packets retransmitted: 0 (0 bytes)

ACK-only packets: 40 (28 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 2-6 Description on the fields of the display tcp statistics command

Field		Description
Received packets:	Total	Total number of packets received
	packets in sequence	Number of packets arriving in sequence
	window probe packets	Number of window probe packets received
	window update packets	Number of window update packets received
	checksum error	Number of checksum error packets received
	offset error	Number of offset error packets received
	short error	Number of received packets with length being too small
	duplicate packets	Number of completely duplicate packets received
	partially duplicate packets	Number of partially duplicate packets received
	out-of-order packets	Number of out-of-order packets received
	packets of data after window	Number of packets outside the receiving window
	packets received after close	Number of packets that arrived after connection is closed
	ACK packets	Number of ACK packets received
	duplicate ACK packets	Number of duplicate ACK packets received
	too much ACK packets	Number of ACK packets for data unsent
Sent packets:	Total	Total number of packets sent
	urgent packets	Number of urgent packets sent
	control packets	Number of control packets sent
	window probe packets	Number of window probe packets sent; in the brackets are resent packets
	window update packets	Number of window update packets sent
	data packets	Number of data packets sent
	data packets retransmitted	Number of data packets retransmitted
	ACK-only packets	Number of ACK packets sent; in brackets are delayed ACK packets
Retransmitted timeout		Number of retransmission timer timeouts
connections dropped in retransmitted timeout		Number of connections broken due to retransmission timeouts
Keepalive timeout		Number of keepalive timer timeouts
keepalive probe		Number of keepalive probe packets sent
Keepalive timeout, so connections disconnected		Number of connections broken due to timeout of keepalive timer
Initiated connections		Number of connections initiated
accepted connections		Number of connections accepted
established connections		Number of connections established
Closed connections		Number of connections closed; in brackets are connections closed accidentally (before receiving SYN from the peer) and connections closed initiatively (after receiving SYN from the peer)
Packets dropped with MD5 authentication		Number of packets dropped with MD5 authentication
Packets permitted with MD5 authentication		Number of packets permitted with MD5 authentication

2.1.8 display tcp status

Syntax

display tcp status

View

Any view

Parameters

None

Description

Use the display tcp status command to display status of all TCP connection for monitoring TCP connections.

Examples

# Display status of all TCP connections

<Sysname> display tcp status

*: TCP MD5 Connection

TCPCB Local Add:port Foreign Add:port State

03e37dc4 0.0.0.0:4001 0.0.0.0:0 Listening

04217174 100.0.0.204:23 100.0.0.253:65508 Established

Table 2-7 Description on the fields of the display tcp status command

Field	Description
*	If the status information of a TCP connection contains *, the TCP adopts the MD5 algorithm for authentication.
TCPCB	TCP control block
Local Add:port	Local IP address and port number
Foreign Add:port	Remote IP address and port number
State	State of the TCP connection

2.1.9 display udp statistics

Syntax

display udp statistics

View

Any view

Parameters

None

Description

Use the display udp statistics command to display statistics of UDP packets.

Related commands: reset udp statistics.

Examples

# Display statistics of UDP packets.

<Sysname> display udp 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 2-8 Description on the fields of the display udp statistics command

Field		Description
Received packets:	Total	Total number of UDP packets received
	checksum error	Total number of packets with incorrect checksum
	shorter than header	Number of packets with data shorter than head
	data length larger than packet	Number of packets with data longer than packet
	unicast(no socket on port)	Number of unicast packets with no socket on port
	broadcast/multicast(no socket on port)	Number of broadcast/multicast packets without socket on port
	not delivered, input socket full	Number of packets not delivered to upper layer due to socket buffer being full
	input packets missing pcb cache	Number of packets without matching PCB cache
Sent packets:	Total	Total number of UDP packets sent

2.1.10 ip forward-broadcast (interface view)

Syntax

ip forward-broadcast [ acl acl-number ]

undo ip forward-broadcast

View

Interface view

Parameters

acl acl-number: Number of an ACL from 2000 to 3999. From 2000 to 2999 are numbers for basic ACLs, and from 3000 to 3999 are numbers for advanced ACLs. Only directed broadcasts permitted by the ACL can be forwarded.

Description

Use the ip forward-broadcast command to enable the interface to forward directed broadcasts.

Use the undo ip forward-broadcast command to disable an interface from forwarding directed broadcasts.

By default, an interface is disabled from forwarding directed broadcasts.

Examples

# Allow VLAN-interface 2 to forward directed broadcasts permitted by ACL 2001.

<Sysname> system-view

[Sysname] interface vlan-interface 2

[Sysname-Vlan-interface2] ip forward-broadcast acl 2001

2.1.11 ip forward-broadcast (system view)

Syntax

ip forward-broadcast

undo ip forward-broadcast

View

System view

Parameters

None

Description

Use the ip forward-broadcast command to enable the device to receive directed broadcasts.

Use the undo ip forward-broadcast command to disable the device from receiving directed broadcasts.

By default, the feature is disabled from receiving directed broadcasts.

Examples

# Enable the device to receive directed broadcasts.

<Sysname> system-view

[Sysname] ip forward-broadcast

2.1.12 ip redirects enable

Syntax

ip redirects enable

undo ip redirects

View

System view

Parameters

None

Description

Use the ip redirects enable command to enable sending ICMP redirection packets.

Use the undo ip redirects command to disable sending ICMP redirection packets.

This feature is enabled by default.

Examples

# Disable sending ICMP redirection packets.

<Sysname> system-view

[Sysname] undo ip redirects

The function is disabled!

2.1.13 ip ttl-expires enable

Syntax

ip ttl-expires enable

undo ip ttl-expires

View

System view

Parameters

None

Description

Use the ip ttl-expires enable command to enable the sending of ICMP timeout packets.

Use the undo ip ttl-expires command to disable sending ICMP timeout packets.

Sending ICMP timeout packets is enabled by default.

If the feature is disabled, the device will not send TTL timeout ICMP packets, but still send “reassembly timeout” ICMP packets.

Examples

# Disable sending ICMP timeout packets.

<Sysname> system-view

[Sysname] undo ip ttl-expires

The function is disabled!

2.1.14 ip unreachables enable

Syntax

ip unreachables enable

undo ip unreachables

View

System view

Parameters

None

Description

Use the ip unreachables enable command to enable the sending of ICMP destination unreachable packets.

Use the undo ip unreachables command to disable sending ICMP destination unreachable packets.

Sending ICMP destination unreachable packets is enabled by default.

If the feature is disabled, the device will not send network unreachable and source route failure ICMP packets, but still send other destination unreachable ICMP packets.

Examples

# Disable sending ICMP destination unreachable packets.

<Sysname> system-view

[Sysname] undo ip unreachables

The function is disabled!

2.1.15 reset ip statistics

Syntax

reset ip statistics

View

User view

Parameters

None

Description

Use the reset ip statistics command to clear statistics of IP packets.

Related commands: display ip interface, display ip statistics.

Examples

# Clear statistics of IP packets.

<Sysname> reset ip statistics

2.1.16 reset tcp statistics

Syntax

reset tcp statistics

View

User view

Parameters

None

Description

Use the reset tcp statistics command to clear statistics of TCP traffic.

Related commands: display tcp statistics.

Examples

# Display statistics of TCP traffic.

<Sysname> reset tcp statistics

2.1.17 reset udp statistics

Syntax

reset udp statistics

View

User view

Parameters

None

Description

Use the reset udp statistics command to clear statistics of UDP traffic.

Examples

# Display statistics of UDP traffic.

<Sysname> reset udp statistics

2.1.18 tcp timer fin-timeout

Syntax

tcp timer fin-timeout time-value

undo tcp timer fin-timeout

View

System view

Parameters

time-value: Length of the TCP finwait timer in seconds, ranging from 76 to 3,600.

Description

Use the tcp timer fin-timeout command to configure the length of the TCP finwait timer.

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

By default, the length of the TCP finwait timer is 675 seconds.

Note that the actual length of the finwait timer is determined by the following formula:

Actual length of the finwait timer = (Configured length of the finwait timer – 75) + configured length of the synwait timer

Related commands: tcp timer syn-timeout, tcp window.

Examples

# Set the length of the TCP finwait timer to 800 seconds.

<Sysname> system-view

[Sysname] tcp timer fin-timeout 800

2.1.19 tcp timer syn-timeout

Syntax

tcp timer syn-timeout time-value

undo tcp timer syn-timeout

View

System view

Parameters

time-value: Length of the TCP finwait timer in seconds, ranging from 2 to 600.

Description

Use the tcp timer syn-timeout command to configure the length of the TCP synwait timer.

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

By default, the length of the TCP synwait timer is 75 seconds.

Related commands: tcp timer fin-timeout, tcp window.

Examples

# Set the length of the TCP synwait timer to 80 seconds.

<Sysname> system-view

[Sysname] tcp timer syn-timeout 80

2.1.20 tcp window

Syntax

tcp window window-size

undo tcp window

View

System view

Parameters

window-size: Receiving/sending buffer size of TCP connection in KB, ranging from 1 to 32.

Description

Use the tcp window command to configure the receiving/sending buffer size of TCP connection.

Use the undo tcp window command to restore the default.

The TCP receiving/sending buffer is 8 KB by default.

Related commands: tcp timer fin-timeout, tcp timer syn-timeout.

Examples

# Configure the receiving/sending buffer of TCP connection as 3 KB.

<Sysname> system-view

[Sysname] tcp window 3

H3C S5500-EI Series Switches Command Manual-Release 2102(V1.01)

1.1.1 display ip interface

2.1.6 display ip statistics

2.1.10 ip forward-broadcast (interface view)

2.1.11 ip forward-broadcast (system view)

2.1.15 reset ip statistics

2.1.16 reset tcp statistics

2.1.18 tcp timer fin-timeout

2.1.19 tcp timer syn-timeout

2.1.20 tcp window

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