pool-number: Displays information about the DHCPv6 address pool specified by the pool number, which ranges from 1 to 128. If no pool number is specified, all DHCPv6 address pool information is displayed.

|: 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.

Description

Use the display ipv6 dhcp pool command to display DHCPv6 address pool information.

Examples

# Display information about DHCPv6 address pool 1.

<Sysname> display ipv6 dhcp pool 1

Pool: 1

Network: 3FFE:501:FFFF:100::/64

Preferred lifetime 604800, valid lifetime 2592000

Static bindings:

DUID: 0003000100E0FC000001

IAID: 0x3F

Prefix: 3FFE:501:FFFF:100::/64

Preferred lifetime 604800, valid lifetime 2592000

DUID: 0003000100E0FC000002

IAID: 0x30

Address: 3FFE:501:FFFF:100::2345/64

Preferred lifetime 604800, valid lifetime 2592000

Prefix pool: 1

Preferred lifetime 201600, valid lifetime 864000

DNS server addresses:

2::2

2::3

Domain name:

aaa.com

SIP server addresses:

5::1

SIP server domain names:

bbb.com

DS-Lite address:

3::6

Table 1 Output description

Field	Description
Pool	DHCPv6 address pool number
Network	IPv6 subnet for dynamic IPv6 address assignment
preferred lifetime	Preferred lifetime of the prefix, in seconds
valid lifetime	Valid lifetime of the prefix, in seconds
Static bindings	Static IPv6 address or prefix information configured in the address pool. If no static prefix is configured, this field is not displayed.
DUID	Client DUID
IAID	Client IAID. If the IAID is not configured, this field displays "Not configured".
Prefix	IPv6 address prefix
Address	Static IPv6 address
Prefix pool	Prefix pool referenced by the address pool. If no referenced prefix pool is specified, this field displays "Not configured".
DNS server addresses	DNS server address. If no DNS server address is configured, this field is not displayed.
SIP server addresses	SIP server address. If no SIP server address is configured, this field is not displayed.
SIP server domain names	Domain name of the SIP server. If no domain name of the SIP server is configured, this field is not displayed.
DS-Lite address	AFTR address. If no AFTR address is configured, this field is not displayed.

display ipv6 dhcp prefix-pool

Syntax

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

View

Any view

Default level

1: Monitor level

Parameters

prefix-pool-number: Displays details about the prefix pool specified by the prefix pool number, in the range of 1 to 128. If no prefix pool number is specified, the brief information of all prefix pools is displayed.

|: 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.

Description

Use the display ipv6 dhcp prefix-pool command to display prefix pool information.

Examples

# Display brief information about all prefix pools.

<Sysname> display ipv6 dhcp prefix-pool

Prefix-pool Prefix Available In-use Static

1 5::/64 64 0 0

# Display details about prefix pool 1.

<Sysname> display ipv6 dhcp prefix-pool 1

Prefix: 5::/64

Assigned length: 70

Total prefix number: 64

Available: 64

In-use: 0

Static: 0

Table 2 Output description

Field	Description
Prefix-pool	Prefix pool number
Prefix	Prefix contained in the prefix pool
Available	Number of idle prefixes
In-use	Number of assigned prefixes
Static	Number of static prefixes
Assigned length	Length of prefixes to be assigned
Total prefix number	Total number of prefixes

display ipv6 dhcp server

Syntax

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

View

Any view

Default level

1: Monitor level

Parameters

interface interface-type interface-number: Displays the DHCPv6 server information of the interface specified by interface type and number. If no interface is specified, the DHCPv6 server information of all interfaces is displayed.

|: 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.

Description

Use the display ipv6 dhcp server command to display DHCPv6 server information.

Examples

# Display the DHCPv6 server information of all interfaces.

<Sysname> display ipv6 dhcp server

DHCPv6 server status: Enabled

Interface Pool

Vlan-interface2 1

Vlan-interface3 2

# Display the DHCPv6 server information on the specified interface.

<Sysname> display ipv6 dhcp server interface vlan-interface 2

Using pool: 1

Preference value: 0

Allow-hint: Enabled

Rapid-commit: Disabled

Table 3 Output description

Field	Description
DHCPv6 server status	DHCPv6 server status, which can be "Enabled" or "Disabled".
Interface	Interface on which the DHCPv6 server is enabled
Pool	Address pool applied to the interface The value 0 indicates that no address pool is applied to the interface. The DHCPv6 server searches all address pools and selects one address pool to assign a prefix or an address to the client.
Using pool	Address pool applied to the interface. If no address pool is applied, this field is not displayed.
Preference value	Server priority in the DHCPv6 Advertise message. The value ranges from 0 to 255. The bigger the value is, the higher priority the server has.
Allow-hint	Whether desired address/prefix assignment is enabled
Rapid-commit	Whether rapid address/prefix assignment is enabled

display ipv6 dhcp server conflict

Syntax

display ipv6 dhcp server conflict { address ipv6-address | all | pool pool-number } [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

address ipv6-address: Displays the conflict information of a specified IPv6 address.

all: Displays all IPv6 address conflict information.

pool pool-number: Displays the IPv6 address conflict information of the DHCPv6 address pool specified by the pool number which ranges from 1 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.

Description

Use the display ipv6 dhcp server conflict command to display IPv6 address conflict information.

Related commands: reset ipv6 dhcp server conflict.

Examples

# Display all IPv6 address conflict information.

<Sysname> display ipv6 dhcp server conflict all

Address Detect time

1:2::1 Nov 23 2010 16:37:08

1:2::2 Nov 23 2010 16:37:08

1:2::3 Nov 23 2010 16:37:08

1:2::4 Nov 23 2010 16:37:08

--- total 4 entries ---

Table 4 Output description

Field	Description
Address	IPv6 address that conflicted with another IPv6 address
Detect time	Time when the conflict was detected

display ipv6 dhcp server expired

Syntax

display ipv6 dhcp server expired { address ipv6-address | all | pool pool-number } [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

address ipv6-address: Displays information about an expired IPv6 address.

all: Displays information about all expired IPv6 addresses.

pool pool-number: Displays information about expired IPv6 addresses in the address pool specified by the pool number which ranges from 1 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.

Description

Use the display ipv6 dhcp server expired command to display information about expired IPv6 addresses.

Examples

# Display information about all expired IPv6 addresses.

<Sysname> display ipv6 dhcp server expired all

Address Client ID Expiration time

1:2::4 00010006498D332 Nov 23 2010 16:12:43

2000102030405

1:2::3 00010006498D332 Nov 23 2010 16:12:43

2000102030405

1:2::2 00010006498D332 Nov 23 2010 16:12:43

2000102030405

1:2::1 00010006498D332 Nov 23 2010 16:12:43

2000102030405

--- total 4 entries ---

Table 5 Output description

Field	Description
Address	Expired IPv6 address
Client ID	Client DUID bound to the expired IPv6 address
Expiration time	Time when the lease expired

display ipv6 dhcp server ip-in-use

Syntax

display ipv6 dhcp server ip-in-use { address ipv6-address | all | pool pool-number } [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

address ipv6-address: Displays the binding information of a specified IPv6 address.

all: Displays all IPv6 address binding information.

pool pool-number: Displays the IPv6 address binding information of the address pool specified by the pool number which ranges from 1 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.

Description

Use the display ipv6 dhcp server ip-in-use command to display IPv6 address binding information.

Related commands: reset ipv6 dhcp server ip-in-use.

Examples

# Display all IPv6 address binding information.

<Sysname> display ipv6 dhcp server ip-in-use all

Total number = 4

Address Type Pool Expiration time

2:1::1 Auto(O) 1 Jul 10 2011 19:45:01

3:1::2 Static(C) 1 Jan 1 2011 11:11:11

1:1::2 Static(F) 2 Not-available

1:2::1f1 Static(O) 3 Oct 9 2011 09:23:31

# Display IPv6 address binding information of address pool 1.

<Sysname> display ipv6 dhcp server ip-in-use pool 1

Total number = 2

Address Type Pool Expiration time

2:1::1 Auto(O) 1 Jul 10 2011 22:22:22

3:1::2 Static(C) 1 Jan 1 2011 11:11:11

# Display the binding information of IPv6 address 2:1::1.

<Sysname> display ipv6 dhcp server ip-in-use address 2:1::1

Pool: 1

Client: FE80::C800:CFF0:FE18:0

Type: Auto(O)

DUID: 00030001CA000C180000

IAID: 0x30001

Address: 2:1::1

Preferred lifetime 400, valid lifetime 500

Expires at Jul 10 2011 09:45:01 (288 seconds left)

Table 6 Output description

Field	Description
Total number	Total number of IPv6 address bindings
Address	Assigned IPv6 address
Type	Type of an IPv6 address binding: · Static(F)—Free static binding, indicating the static address has not been assigned to the client. · Static(O)—Offered static binding. If the server replies with an Advertise message to the client during the four-step message exchange, the server sets the type of the static binding configured for the client to Static(O). · Static(C)—Committed static binding, indicating the static IPv6 address has been assigned to the client in a Reply message. · Auto(O)—Offered dynamic binding. If the server selects a dynamic IPv6 address and replies with an Advertise message to the client during the four-step message exchange, the server sets the type of the dynamic IPv6 address binding to Auto(O). · Auto(C)—Committed dynamic binding, indicating the dynamic IPv6 address has been assigned to the client in a Reply message.
Pool	Address pool to which the binding belongs
Expiration time	Time when the lease of an IPv6 address expires. If the lease expires after the year 2100, this field displays “after 2100.” For a free static binding, this field displays “Not-available.”
Client	Link-local address of a DHCPv6 client. For a free static binding, this field displays null.
DUID	Client DUID
IAID	Client IAID. For a free static binding without IAID specified, this field displays null.
Expires at	Time when the lease of an IPv6 address expires. If the lease expires after the year 2100, this field displays “Expires after 2100.”

display ipv6 dhcp server pd-in-use

Syntax

display ipv6 dhcp server pd-in-use { all | pool pool-number | prefix prefix/prefix-len | prefix-pool prefix-pool-number } [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

all: Displays all IPv6 prefix binding information.

pool pool-number: Displays the prefix binding information of the DHCPv6 address pool specified by the pool number, which ranges from 1 to 128.

prefix prefix/prefix-len: Displays the binding information of the specified prefix. The prefix/prefix-len indicates the IPv6 prefix and prefix length. The value of the prefix length ranges from 1 to 128.

prefix-pool prefix-pool-number: Displays the prefix binding information of the prefix pool specified by the prefix pool number, which ranges from 1 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.

Description

Use the display ipv6 dhcp server pd-in-use command to display IPv6 prefix binding information.

The binding information generated for static prefixes is not displayed when you display the prefix binding information of a specific prefix pool.

Examples

# Display all IPv6 prefix binding information.

<Sysname> display ipv6 dhcp server pd-in-use all

Total number = 3

Prefix Type Pool Expiration time

2:1::/24 Auto(O) 1 Jul 10 2011 19:45:01

1:1::/64 Static(F) 2 Not-available

1:2::/64 Static(O) 3 Oct 9 2011 09:23:31

# Display the prefix binding information of the specified DHCPv6 address pool.

<Sysname> display ipv6 dhcp server pd-in-use pool 1

Total number = 2

Prefix Type Pool Expiration time

2:1::/24 Auto(O) 1 Jul 10 2011 22:22:22

3:1::/64 Static(C) 1 Jan 1 2011 11:11:11

# Display the prefix binding information of the specified prefix pool.

<Sysname> display ipv6 dhcp server pd-in-use prefix-pool 1

Total number = 1

Prefix Type Pool Expiration time

2:1:1:2::/64 Auto(C) 2 Jan 1 2011 14:45:56

# Display the prefix binding information of the specified prefix.

<Sysname> display ipv6 dhcp server pd-in-use prefix 2:1::3/24

Pool: 1

Prefix pool: 1

Client: FE80::C800:CFF:FE18:0

Type: Auto(O)

DUID: 00030001CA000C180000

IAID: 0x30001

Prefix: 2:1::/24

Preferred lifetime 400, valid lifetime 500

Expires at Jul 10 2011 09:45:01 (288 seconds left)

Table 7 Output description

Field	Description
Total number	Total number of prefix bindings
Prefix	Assigned IPv6 prefix
Type	Type of a prefix binding: · Static(F)—Free static binding, indicating the static prefix has not been assigned to the client. · Static(O)—Offered static binding. If the server replies with an Advertise message to the client during the four-step message exchange, the server sets the type of the static binding configured for the client to Static(O). · Static(C)—Committed static binding, indicating the static IPv6 prefix has been assigned to the client in a Reply message. · Auto(O)—Offered dynamic binding. If the server selects a dynamic IPv6 prefix and replies with an Advertise message to the client during the four-step message exchange, the server sets the type of the dynamic IPv6 prefix binding to Auto(O). · Auto(C)—Committed dynamic binding, indicating the dynamic IPv6 prefix has been assigned to the client in a Reply message.
Pool	Address pool to which the prefix binding belongs
Expiration time	Time when the prefix lease expires. If the lease expires after the year 2100, this field displays "after 2100." For a free static binding, this field displays "Not-available."
Prefix Pool	Prefix pool to which the prefix binding belongs. For a free static binding, this field displays null.
Client	IPv6 address of the DHCPv6 client. For a free static binding, this field displays null.
DUID	Client DUID
IAID	Client IAID. For a free static binding without IAID configured, this field displays null.
preferred lifetime	Preferred lifetime of the prefix, in seconds.
valid lifetime	Valid lifetime of the prefix, in seconds.
Expires at	Time when the prefix lease expires. If the lease expires after the year 2100, this field displays "Expires after 2100."

display ipv6 dhcp server statistics

Syntax

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

View

Any view

Default 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.

Description

Use the display ipv6 dhcp server statistics command to display packet statistics on the DHCPv6 server.

Examples

# Display packet statistics on the DHCPv6 server.

<Sysname> display ipv6 dhcp server statistics

Packets received : 0

SOLICIT : 0

REQUEST : 0

CONFIRM : 0

RENEW : 0

REBIND : 0

RELEASE : 0

DECLINE : 0

INFORMATION-REQUEST: 0

RELAY-FORWARD : 0

Packets dropped : 0

Packets sent : 0

ADVERTISE : 0

RECONFIGURE : 0

REPLY : 0

RELAY-REPLY : 0

Table 8 Output description

Field	Description
Packets received	Number of messages received by the DHCPv6 server. The message types include: · SOLICIT · REQUEST · CONFIRM · RENEW · REBIND · RELEASE · DECLINE · INFORMATION-REQUEST · RELAY-FORWARD
Packets dropped	Number of packets discarded
Packets sent	Number of messages sent out from the DHCPv6 server. The message types include: · ADVERTISE · RECONFIGURE · REPLY · RELAY-REPLY

dns-server

Syntax

dns-server ipv6-address

undo dns-server ipv6-address

View

DHCPv6 address pool view

Default level

2: System level

Parameters

ipv6-address: IPv6 address of a DNS server.

Description

Use the dns-server command to specify a DNS server for the client.

Use the undo dns-server command to remove the specified DNS server.

No DNS server address is specified by default.

Note the following:

· You can configure multiple DNS server addresses by using the dns-server command repeatedly.

· You can configure up to eight DNS servers in an address pool.

· The precedence of the specified DNS servers depends on the configuration sequence. The formerly specified DNS server takes precedence over the latter one.

Examples

# Specify the DNS server address to be assigned to the client as 2:2::3.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] dns-server 2:2::3

domain-name

Syntax

domain-name domain-name

undo domain-name

View

DHCPv6 address pool view

Default level

2: System level

Parameters

domain-name: Domain name, a string of 1 to 50 characters.

Description

Use the domain-name command to configure the domain name for the client.

Use the undo domain-name command to remove the configuration.

By default, no domain name is configured for the client.

Note the following:

· You can configure only one domain name in an address pool.

· If you repeatedly use the domain-name command, the latest configuration will overwrite the previous one.

Examples

# Configure the domain name to be assigned to the client as aaa.com.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] domain-name aaa.com

ds-lite address

Syntax

ds-lite address ipv6-address

undo ds-lite address

View

DHCPv6 address pool view

Default level

2: System level

Parameters

ipv6-address: IPv6 address of the Address Family Transition Router (AFTR).

Description

Use the ds-lite address command to specify the address of the AFTR.

Use the undo ds-lite address command to delete the address of the AFTR.

The address of the AFTR is not specified by default.

When you configure a DS-lite tunnel, the Customer Premises Equipment (CPE) sends a DHCPv6 request to obtain the address of the AFTR. Upon receiving the request, the DHCPv6 server sends the address of the AFTR to the CPE. For more information about the DS-lite tunnel, see Layer 3—IP Services Configuration Guide.

You can specify only one AFTR address for an address pool. The latest setting overrides the previous one.

Examples

# Specify the AFTR address as 2::1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] ds-lite address 2::1

network

Network

network network-address/prefix-length [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ]

undo network

View

DHCPv6 address pool view

Default level

2: System level

Parameters

network-address/prefix-length: IPv6 subnet for dynamic assignment. network-address is the IPv6 address and prefix-length is the prefix length. The prefix length ranges from 1 to 128.

preferred-lifetime preferred-lifetime: Specifies the preferred lifetime for IPv6 addresses assigned from the subnet. The value ranges from 60 to 4,294,967,295 seconds and defaults to 604,800 seconds (seven days).

valid-lifetime valid-lifetime: Specifies the valid lifetime for IPv6 addresses assigned from the subnet. The value ranges from 60 to 4,294,967,295 seconds and defaults to 2,592,000 seconds (30 days). The valid lifetime cannot be shorter than the preferred lifetime.

Description

Use the network command to specify an IPv6 subnet in a DHCPv6 address pool for dynamic address assignment.

Use the undo network command to remove an IPv6 subnet from a DHCPv6 address pool.

By default, no IPv6 subnet is configured for dynamic address assignment.

Note the following:

· Only one subnet can be specified in an address pool. If you use the network command repeatedly in a DHCPv6 address pool, the new configuration overwrites the previous one. If the new configuration has the same subnet as but different preferred lifetime and valid lifetime from the previous configuration, the new preferred lifetime and valid lifetime are effective only to the IPv6 addresses not assigned to DHCPv6 clients.

· You cannot use the network command to configure the same subnet in different address pools.

· The network command cannot be used to specify a subnet where all the addresses are link-local or multicast addresses. The network command can be used to specify a subnet where some of the addresses are link-local or multicast addresses, but these addresses are not assignable.

Related commands: display ipv6 dhcp pool.

Examples

# Specify IPv6 subnet 3ffe:501:ffff:100::/64 in DHCPv6 address pool 1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] network 3ffe:501:ffff:100::/64

ipv6 dhcp pool

Syntax

ipv6 dhcp pool pool-number

undo ipv6 dhcp pool pool-number

View

System view

Default level

2: System level

Parameters

pool-number: Address pool number, in the range of 1 to 128.

Description

Use the ipv6 dhcp pool command to create a DHCPv6 address pool and enter DHCPv6 address pool view, or enter DHCPv6 address pool view if the specified address pool already exists.

Use the undo ipv6 dhcp pool command to remove the address pool.

No DHCPv6 address pool is configured by default.

Examples

# Create DHCPv6 address pool 1 and enter its view.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1]

ipv6 dhcp prefix-pool

Syntax

ipv6 dhcp prefix-pool prefix-pool-number prefix prefix/prefix-len assign-len assign-len

undo ipv6 dhcp prefix-pool prefix-pool-number

View

System view

Default level

2: System level

Parameters

prefix-pool-number: Prefix pool number, in the range of 1 to 128.

prefix prefix/prefix-len: Specifies the prefix contained in the specified prefix pool. The prefix indicates the IPv6 prefix. The prefix-len indicates the prefix length, in the range of 1 to 128.

assign-len assign-len: Specifies the length of the prefix assigned. The value ranges from 1 to 128. The assign-len must be higher than or equal to the prefix-len, and the difference between them must be less than or equal to 16.

Description

Use the ipv6 dhcp prefix-pool command to create a prefix pool and specify the prefix and the length of the prefix assigned.

Use the undo ipv6 dhcp prefix-pool command to remove the prefix pool.

No prefix pool is configured by default.

Note the following:

· The prefix ranges of the prefix pools cannot overlap.

· You cannot modify an existing prefix pool.

· Removing a prefix pool will clear all prefix bindings assigned from the prefix pool.

Examples

# Create prefix pool 1 that contains the prefix 2001:0410::/32 and specify the length of prefixes to be assigned as 42. Prefix pool 1 can assign 1024 prefixes in the range of 2001:0410::/42 to 2001:0410:FFC0::/42.

<Sysname> system-view

[Sysname] ipv6 dhcp prefix-pool 1 prefix 2001:0410::/32 assign-len 42

ipv6 dhcp server

Syntax

ipv6 dhcp server [ allow-hint | apply pool pool-number | preference preference-value | rapid-commit ] *

undo ipv6 dhcp server

View

Interface view

Default level

2: System level

Parameters

allow-hint: Configure the server to support desired address and prefix assignment. If this keyword is not specified, the server does not support assignment of desired addresses and prefixes.

apply pool pool-number: Applies an address pool to the interface. The pool number ranges from 1 to 128. If this option is specified, the DHCPv6 server assigns an IPv6 address or prefix from the address pool applied on the interface to the client. If not, the server searches all DHCPv6 address pools to assign an appropriate one to the client.

preference preference-value: Specifies the server priority in Advertise messages, in the range of 0 to 255. The default value is 0. A higher value indicates a higher priority.

rapid-commit: Configure the server to support rapid prefix assignment. If this keyword is not specified, the server does not support rapid address and prefix assignment.

Description

Use the ipv6 dhcp server command to enable the DHCPv6 server on the interface.

Use the undo ipv6 dhcp server command to remove the configuration.

By default, the DHCPv6 server is not enabled on an interface.

Upon receiving a request, the interface enabled with the DHCPv6 server selects an IPv6 address or a prefix from the address pool and assigns it to the client.

CAUTION:

You can configure the ipv6 dhcp server apply pool command only on Ethernet interface cards, rather than base cards and subcards. Fore more information about Ethernet interface cards, base cards, and subards, see the appendixes in S9500E Installation Guide.

With the allow-hint keyword specified, the server assigns the desired address or prefix to the requesting client. If the desired address or prefix is not included in the assignable address pool of the interface, or is already assigned to another client, the server ignores the desired address or prefix and assigns the client an address or a prefix from the free addresses or prefixes.

Note the following:

· An interface cannot serve as a DHCPv6 server and DHCPv6 relay agent at the same time. It is not recommended that you enable the DHCPv6 server and DHCPv6 client on the same interface.

· Only one address pool can be applied to an interface.

· You can apply a non-existing address pool to an interface. However, the server cannot assign any address, prefix, or other configuration information from the address pool until the address pool is created.

· You cannot modify the address pool applied to an interface or parameters such as the server priority by using the ipv6 dhcp server command. To do so, you must disable the DHCPv6 server on the interface first.

Examples

# Apply prefix pool 1 to VLAN-interface 2, configure the server to support desired prefix assignment and rapid prefix assignment, and set the highest priority of 255.

<Sysname> system-view

[Sysname] interface vlan-interface 2

[Sysname-Vlan-interface2] ipv6 dhcp server apply pool 1 allow-hint preference 255 rapid-commit

ipv6 dhcp server enable

Syntax

ipv6 dhcp server enable

undo ipv6 dhcp server enable

View

System view

Default level

2: System level

Parameters

None

Description

Use the ipv6 dhcp server enable command to enable the DHCPv6 server.

Use the undo ipv6 dhcp server enable command to disable the DHCPv6 server.

By default, the DHCPv6 server is disabled.

Other DHCPv6 server related configuration is effective only when the DHCPv6 server is enabled.

Examples

# Enable the DHCPv6 server.

<Sysname> system-view

[Sysname] ipv6 dhcp server enable

prefix-pool

Syntax

prefix-pool prefix-pool-number [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ]

undo prefix-pool

View

DHCPv6 address pool view

Default level

2: System level

Parameters

prefix-pool-number: Prefix pool number, in the range of 1 to 128.

preferred-lifetime preferred-lifetime: Specifies the preferred lifetime of prefixes to be assigned. The value ranges from 60 to 4294967295, in seconds. The default value is 604800 seconds (seven days).

valid-lifetime valid-lifetime: Specifies the valid lifetime of the prefixes to be assigned. The value ranges from 60 to 4294967295, in seconds. The default value is 2592000 seconds (30 days). The valid lifetime must be greater than or equal to the preferred lifetime.

Description

Use the prefix-pool command to apply a prefix pool to the DHCPv6 address pool, so that the DHCPv6 server can dynamically select a prefix from the prefix pool and assign it to the client.

Use the undo prefix-pool command to remove the configuration.

No prefix pool is referenced by an address pool by default.

Note the following:

· Only one prefix pool can be referenced by an address pool.

· A non-existing prefix pool can be referenced by an address pool. However, no prefix is available in the prefix pool for dynamic prefix assignment until the prefix pool is created.

· You cannot modify the prefix pool referenced by an address pool, or the preferred lifetime or valid lifetime by using the prefix-pool command. You need to remove the configuration before you can have another prefix pool referenced by the address pool, or modify the preferred lifetime and valid lifetime.

Examples

# Apply prefix pool 1 to address pool 1, and use the default preferred lifetime and valid lifetime.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] prefix-pool 1

# Apply prefix pool 1 to address pool 1, and set the valid lifetime to three days, the preferred lifetime to one day.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] prefix-pool 1 preferred-lifetime 86400 valid-lifetime 259200

reset ipv6 dhcp server conflict

Syntax

reset ipv6 dhcp server conflict { address ipv6-address | all | pool pool-number }

View

User view

Default level

2: System level

Parameters

address ipv6-address: Clears conflict information of a specified IPv6 address.

all: Clears all IPv6 address conflict information.

pool pool-number: Clears IPv6 address conflict information for the address pool specified by the pool number.

Description

Use the reset ipv6 dhcp server conflict command clear IPv6 address conflict information.

Related commands: display ipv6 dhcp server conflict.

Examples

# Clear all IPv6 address conflict information.

<Sysname> reset ipv6 dhcp server conflict all

reset ipv6 dhcp server ip-in-use

Syntax

reset ipv6 dhcp server ip-in-use { address ipv6-address | all | pool pool-number }

View

User view

Default level

2: System level

Parameters

address ipv6-address: Clears the binding information of a specified IPv6 address.

all: Clears all IPv6 address binding information.

pool pool-number: Clears IPv6 address binding information for the address pool specified by the pool number.

Description

Use the reset ipv6 dhcp server ip-in-use command to clear IPv6 address binding information.

This command only clears offered and committed static bindings but not free static bindings.

This command changes offered and committed static bindings to free static bindings.

Related commands: display ipv6 dhcp server ip-in-use.

Examples

# Clear all IPv6 address binding information.

<Sysname> reset ipv6 dhcp server ip-in-use all

# Clear IPv6 address binding information of address pool 1.

<Sysname> reset ipv6 dhcp server ip-in-use pool 1

# Clear the binding information of IPv6 address 2001:0:0:1::1.

<Sysname> reset ipv6 dhcp server ip-in-use address 2001:0:0:1::1

reset ipv6 dhcp server pd-in-use

Syntax

reset ipv6 dhcp server pd-in-use { all | pool pool-number | prefix prefix/prefix-len }

View

User view

Default level

2: System level

Parameters

all: Clears all IPv6 prefix binding information.

pool pool-number: Clears the IPv6 prefix binding information of the address pool specified by the pool number. The pool number ranges from 1 to 128.

prefix prefix/prefix-len: Clears the binding information of the specified IPv6 prefix. The prefix/prefix-len indicates the IPv6 prefix and prefix length. The value prefix length ranges from 1 to 128.

Description

Use the reset ipv6 dhcp server pd-in-use command to clear IPv6 prefix binding information.

This command only clears offered and committed static bindings but not free static bindings.

This command changes offered and committed static bindings to free static bindings.

Examples

# Clear all IPv6 prefix binding information.

<Sysname> reset ipv6 dhcp server pd-in-use all

# Clear the IPv6 prefix binding information of address pool 1.

<Sysname> reset ipv6 dhcp server pd-in-use pool 1

# Clear the binding information of IPv6 prefix 2001:0:0:1::/64.

<Sysname> reset ipv6 dhcp server pd-in-use prefix 2001:0:0:1::/64

reset ipv6 dhcp server statistics

Syntax

reset ipv6 dhcp server statistics

View

User view

Default level

1: Monitor level

Parameters

None

Description

Use the reset ipv6 dhcp server statistics command to remove packet statistics on the DHCPv6 server.

Examples

# Clear packet statistics on the DHCPv6 server.

<Sysname> reset ipv6 dhcp server statistics

sip-server

Syntax

sip-server { address ipv6-address | domain-name domain-name }

undo sip-server { address ipv6-address | domain-name domain-name }

View

DHCPv6 address pool view

Default level

2: System level

Parameters

address ipv6-address: Specifies the IPv6 address of a SIP server.

domain-name domain-name: Specifies the domain name of a SIP server. The domain name is a string of 1 to 50 characters.

Description

Use the sip-server command to configure the IPv6 address or domain name of a SIP server for the client.

Use the undo sip-server command to remove the configuration.

No SIP server address or domain name is specified by default.

Note the following:

· You can configure up to eight SIP server addresses and eight SIP server domain names in an address pool. The priorities of the specified SIP servers depend on the configuration sequence. The formerly specified SIP server takes precedence over the latter one.

· If you repeatedly use the sip-server command, the latest configuration will not overwrite the previous one.

Examples

# Specify the SIP server address as 2:2::4 for the client.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] sip-server address 2:2::4

# Specify the domain name of the SIP server as bbb.com for the client.

[Sysname-dhcp6-pool-1] sip-server domain-name bbb.com

static-bind address

Syntax

static-bind address ipv6-address/addr-prefix-length duid duid [ iaid iaid ] [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ]

undo static-bind address ipv6-address/addr-prefix-length

View

DHCPv6 address pool view

Default level

2: System level

Parameters

ipv6-address/addr-prefix-length: Static IPv6 address and prefix length. The prefix length ranges from 1 to 128.

duid duid: Specifies a client DUID. The value is an even hexadecimal number, in the range of 2 to 256.

iaid iaid: Specifies a client IAID. The value is a hexadecimal number in the range of 0 to FFFFFFFF. If no IAID is specified, the server does not match against the client IAID during address assignment.

preferred-lifetime preferred-lifetime: Specifies the preferred lifetime of the static IPv6 address. The value ranges from 60 to 4,294,967,295 seconds and defaults to 604,800 seconds (seven days).

valid-lifetime valid-lifetime: Specifies the valid lifetime of the static IPv6 address. The value ranges from 60 to 4,294,967,295 seconds and defaults to 2,592,000 seconds (30 days). The valid lifetime cannot be shorter than the preferred lifetime.

Description

Use the static-bind address command to configure a static IPv6 address binding in an address pool.

Use the undo static-bind address command to remove a static IPv6 address binding.

By default, no static IPv6 address binding is configured in an address pool.

Note the following:

· You can configure multiple static IPv6 address bindings by using the static-bind address command repeatedly.

· An IPv6 address can be bound to only one DHCPv6 client. You cannot use the static-bind address command to modify the DUID, IAID, preferred lifetime and valid lifetime of a static IPv6 address binding. To do so, you must remove the static binding first.

Related commands: display ipv6 dhcp pool.

Examples

# In address pool 1, bind static address 2001:0410::2/35 to the client with DUID 00030001CA0006A400 and IAID A1A1A1A1, and use the default settings of the preferred lifetime and valid lifetime.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] static-bind address 2001:0410::2/35 duid 00030001CA0006A400 iaid

static-bind prefix

Syntax

static-bind prefix prefix/prefix-len duid duid [ iaid iaid ] [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ]

undo static-bind prefix prefix/prefix-len

View

DHCPv6 address pool view

Default level

2: System level

Parameters

prefix/prefix-len: Static prefix and prefix length. The prefix length ranges from 1 to 128.

duid duid: Specifies a client DUID. The value is an even hexadecimal number, in the range of 2 to 256.

iaid iaid: Specifies a client IAID. The value is a hexadecimal number in the range of 0 to FFFFFFFF. If no IAID is specified, the server does not match against the client IAID for prefix assignment.

preferred-lifetime preferred-lifetime: Specifies the preferred lifetime of the prefix to be assigned. The value ranges from 60 to 4294967295, in seconds. The default value is 604800 seconds (seven days).

valid-lifetime valid-lifetime: Specifies the valid lifetime of the prefix to be assigned. The value ranges from 60 to 4294967295, in seconds. The default value is 2592000 seconds (30 days). The valid lifetime must be greater than or equal to the preferred lifetime.

Description

Use the static-bind prefix command to configure a static prefix.

Use the undo static-bind prefix command to remove a static prefix.

No static prefix is configured by default.

An IPv6 prefix can be bound to only one DHCPv6 client. You cannot use the static-bind prefix command to modify the DUID, IAID, preferred lifetime, and valid lifetime of an existing static IPv6 prefix binding. To do so, you must remove the static IPv6 prefix binding first.

Related commands: display ipv6 dhcp pool.

Examples

# In address pool 1, bind static prefix 2001:0410::/35 to the client with DUID 00030001CA0006A400 and IAID A1A1A1A1, and set the preferred lifetime to one day, and the valid lifetime to three days.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] static-bind prefix 2001:0410::/35 duid 00030001CA0006A400 iaid A1A1A1A1 preferred-lifetime 86400 valid-lifetime 259200

DHCPv6 relay agent configuration commands

display ipv6 dhcp relay server-address

Syntax

display ipv6 dhcp relay server-address { all | interface interface-type interface-number } [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

all: Displays all DHCPv6 server address information.

interface interface-type interface-number: Displays DHCPv6 server address information of the specified 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.

Description

Use the display ipv6 dhcp relay server-address command to display information about DHCPv6 server addresses specified on the DHCPv6 relay agent.

Examples

# Display all the DHCPv6 server address information.

<Sysname> display ipv6 dhcp relay server-address all

Interface: Vlan2

Server address(es) Output Interface

1::1

FF02::1:2 Vlan4

Interface: Vlan3

Server address(es) Output Interface

1::1

FF02::1:2 Vlan4

# Display DHCPv6 server address information of VLAN-interface 2.

<Sysname> display ipv6 dhcp relay server-address interface vlan-interface 2

Interface: Vlan2

Server address(es) Output Interface

1::1

FF02::1:2 Vlan4

Table 9 Output description

Field	Description
Interface	Interface that serves as the DHCPv6 relay agent
Server address(es)	DHCPv6 server address(es) specified on the interface
Output Interface	Outgoing interface of DHCPv6 packets

display ipv6 dhcp relay statistics

Syntax

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

View

Any view

Default 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.

Description

Use the display ipv6 dhcp relay statistics command to display packet statistics on the DHCPv6 relay agent.

Related commands: reset ipv6 dhcp relay statistics.

Examples

# Display packet statistics on the DHCPv6 relay agent.

<Sysname> display ipv6 dhcp relay statistics

Packets dropped : 4

Error : 4

Excess of rate limit : 0

Packets received : 14

SOLICIT : 0

REQUEST : 0

CONFIRM : 0

RENEW : 0

REBIND : 0

RELEASE : 0

DECLINE : 0

INFORMATION-REQUEST : 7

RELAY-FORWARD : 0

RELAY-REPLY : 7

Packets sent : 14

ADVERTISE : 0

RECONFIGURE : 0

REPLY : 7

RELAY-FORWARD : 7

RELAY-REPLY : 0

Table 10 Output description

Field	Description
Packets dropped	Number of discarded packets
Error	Number of discarded error packets
Excess of rate limit	Number of packets discarded due to excess of rate limit
Packets received	Number of received packets
SOLICIT	Number of received solicit packets
REQUEST	Number of received request packets
CONFIRM	Number of received confirm packets
RENEW	Number of received renew packets
REBIND	Number of received rebind packets
RELEASE	Number of received release packets
DECLINE	Number of received decline packets
INFORMATION-REQUEST	Number of received information request packets
RELAY-FORWARD	Number of received relay-forward packets
RELAY-REPLY	Number of received relay-reply packets
Packets sent	Number of sent packets
ADVERTISE	Number of sent advertise packets
RECONFIGURE	Number of sent reconfigure packets
REPLY	Number of sent reply packets
RELAY-FORWARD	Number of sent Relay-forward packets
RELAY-REPLY	Number of sent Relay-reply packets

ipv6 dhcp relay server-address

Syntax

ipv6 dhcp relay server-address ipv6-address [ interface interface-type interface-number ]

undo ipv6 dhcp relay server-address ipv6-address [ interface interface-type interface-number ]

View

Interface view

Default level

2: System level

Parameters

ipv6-address: IPv6 address of the DHCPv6 server.

interface interface-type interface-number: Specifies an outgoing interface for DHCPv6 packets.

Description

Use the ipv6 dhcp relay server-address command to enable DHCPv6 relay agent on the interface and specify a DHCPv6 server.

Use the undo ipv6 dhcp relay server-address command to remove the DHCPv6 server from the interface.

By default, DHCPv6 relay agent is disabled and no DHCPv6 server is specified on the interface.

Upon receiving a request from a DHCPv6 client, the interface that operates as a DHCPv6 relay agent encapsulates the request into a Relay-forward message and forwards the message to the specified DHCPv6 server, which then assigns an IPv6 address and other configuration parameters to the DHCPv6 client.

Note the following:

· Executing the ipv6 dhcp relay server-address command repeatedly can specify multiple DHCPv6 servers, and up to eight DHCP servers can be specified for an interface. After receiving requests from DHCPv6 clients, the DHCPv6 relay agent forwards the requests to all the specified DHCPv6 servers.

· If the DHCPv6 server address is a link-local address or link-scoped multicast address on the local link, you must specify an outgoing interface. If no outgoing interface is specified, DHCPv6 packets may fail to be forwarded to the DHCPv6 server.

· After you remove all the specified DHCPv6 servers from an interface with the undo ipv6 dhcp relay server-address command, DHCPv6 relay agent is disabled on the interface.

· An interface cannot serve as a DHCPv6 client and DHCPv6 relay agent at the same time.

Related commands: display ipv6 dhcp relay server-address.

Examples

# Enable DHCPv6 relay agent on VLAN-interface 2, and specify the DHCPv6 server address as 2001:1::3.

<Sysname> system-view

[Sysname] interface vlan-interface 2

[Sysname-Vlan-interface2] ipv6 dhcp relay server-address 2001:1::3

reset ipv6 dhcp relay statistics

Syntax

reset ipv6 dhcp relay statistics

View

User view

Default level

1: Monitor level

Parameters

None

Description

Use the reset ipv6 dhcp relay statistics command to clear packets statistics on the DHCPv6 relay agent.

After this command is executed, the packets statistics is displayed as 0 when you use the display ipv6 dhcp relay statistics command.

Related commands: display ipv6 dhcp relay statistics.

Examples

# Clear packet statistics on the DHCPv6 relay agent.

<Sysname> reset ipv6 dhcp relay statistics

DHCPv6 snooping configuration commands

display ipv6 dhcp snooping trust

Syntax

display ipv6 dhcp snooping trust [ | { begin | exclude | include } regular-expression ]

View

Any view

Default 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.

Description

Use the display ipv6 dhcp snooping trust command to display DHCPv6 snooping trusted ports.

Examples

# Display DHCPv6 snooping trusted ports.

<Sysname> display ipv6 dhcp snooping trust

Trusted ports include:

GigabitEthernet3/0/1

GigabitEthernet3/0/2

display ipv6 dhcp snooping user-binding

Syntax

display ipv6 dhcp snooping user-binding { ipv6-address | dynamic } [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

ipv6-address: Displays DHCPv6 snooping entries of the specified IPv6 address.

dynamic: Displays all DHCPv6 snooping 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.

Description

Use the display ipv6 dhcp snooping user-binding command to display DHCPv6 snooping entries.

Examples

# Display all DHCPv6 snooping entries.

<Sysname> display ipv6 dhcp snooping user-binding dynamic

IPv6 Address MAC Address Lease VLAN Interface

============================== ============== ========== ==== ==================

2::1 00e0-fc00-0006 286 1 GigabitEthernet3/0/1

--- 1 DHCPv6 snooping item(s) found ---

Table 11 Output description

Field	Description
IPv6 Address	IPv6 address in the DHCPv6 snooping entry
MAC Address	MAC address in the DHCPv6 snooping entry
Lease	Remaining lease of the DHCPv6 snooping entry, in seconds.
VLAN	VLAN to which the interface belongs
Interface	Interface through which the DHCPv6 client is connected

ipv6 dhcp snooping enable

Syntax

ipv6 dhcp snooping enable

undo ipv6 dhcp snooping enable

View

System view

Default level

2: System level

Parameters

None

Description

Use the ipv6 dhcp snooping enable command to enable DHCPv6 snooping globally.

Use the undo ipv6 dhcp snooping enable command to disable DHCPv6 snooping globally.

By default, global DHCPv6 snooping is disabled.

After DHCPv6 snooping is enabled in system view, the DHCPv6 snooping device discards DHCPv6 reply messages received by an untrusted port if any, and does not record DHCPv6 entries.

Examples

# Enable DHCPv6 snooping globally.

<Sysname> system-view

[Sysname] ipv6 dhcp snooping enable

ipv6 dhcp snooping max-learning-num

Syntax

ipv6 dhcp snooping max-learning-num number

undo ipv6 dhcp snooping max-learning-num

View

Layer 2 Ethernet interface view, Layer 2 aggregate interface view

Default level

2: System level

Parameters

number: Maximum number of DHCPv6 snooping entries an interface can learn, in the range of 0 to 8192.

Description

Use the ipv6 dhcp snooping max-learning-num command to configure the maximum number of DHCPv6 snooping entries an interface can learn.

Use the undo ipv6 dhcp snooping max-learning-num command to restore the default.

By default, the number of DHCPv6 snooping entries learned by an interface is not limited.

Examples

# Set the maximum number of DHCPv6 snooping entries Layer 2 Ethernet interface GigabitEthernet 3/0/1 can learn to 1000.

<Sysname> system-view

[Sysname] interface gigabitethernet 3/0/1

[Sysname-GigabitEthernet3/0/1] ipv6 dhcp snooping max-learning-num 1000

ipv6 dhcp snooping trust

Syntax

ipv6 dhcp snooping trust

undo ipv6 dhcp snooping trust

View

Layer 2 Ethernet interface view, Layer 2 aggregate interface view

Default level

2: System level

Parameters

None

Description

Use the ipv6 dhcp snooping trust command to configure a DHCPv6 trusted port.

Use the undo ipv6 dhcp snooping trust command to restore the default.

By default, all interfaces of a switch with DHCPv6 snooping enabled globally are untrusted ports.

After DHCPv6 snooping is enabled, to make sure that DHCPv6 clients can obtain IPv6 addresses from an authorized DHCPv6 server, you need to configure the port that connects to the authorized DHCPv6 server as a trusted port.

Examples

# Configure Ethernet interface GigabitEthernet 3/0/1 as a trusted port.

<Sysname> system-view

[Sysname] interface gigabitethernet 3/0/1

[Sysname-GigabitEthernet3/0/1] ipv6 dhcp snooping trust

ipv6 dhcp snooping vlan enable

Syntax

ipv6 dhcp snooping vlan enable

undo ipv6 dhcp snooping vlan enable

View

VLAN view

Default level

2: System level

Parameters

None

Description

Use the ipv6 dhcp snooping vlan enable command to enable DHCPv6 snooping for a specific VLAN.

Use the undo ipv6 dhcp snooping vlan enable command to restore the default.

By default, DHCPv6 snooping is disabled for a VLAN.

After DHCPv6 snooping is enabled globally and then enabled for a VLAN, the DHCPv6 snooping device records DHCPv6 snooping entries according to the DHCPv6 packets received in the VLAN. Meanwhile, upon receiving a DHCPv6 request from a client in the VLAN, the switch forwards the packet through trusted ports rather than any untrusted port in the VLAN, thus reducing network traffic.

Examples

# Enable DHCPv6 snooping for VLAN 2.

<Sysname> system-view

[Sysname] vlan 2

[Sysname-vlan2] ipv6 dhcp snooping vlan enable

reset ipv6 dhcp snooping user-binding

Syntax

reset ipv6 dhcp snooping user-binding { ipv6-address | dynamic }

View

User view

Default level

2: System level

Parameters

ipv6-address: Clears DHCPv6 snooping entries of the specified IPv6 address.

dynamic: Clears all DHCPv6 snooping entries.

Description

Use the reset ipv6 dhcp snooping user-binding command to clear DHCPv6 snooping entries.

Examples

# Clear all DHCPv6 snooping entries.

<Sysname> reset ipv6 dhcp snooping user-binding dynamic

06-Layer 3 - IP Services Command Reference

DHCPv6 configuration commands

DHCPv6 common configuration commands

display ipv6 dhcp duid

DHCPv6 server configuration commands

domain-name

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