Cisco Catalyst 3560-X Command Reference Manual page 331

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Catalyst 3750-X and 3560-X Switch Cisco IOS Commands

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If the packet was directly received from the client, the server performs this same matching, but it uses

all the IPv6 addresses configured on the incoming interface when performing the match. Once again, the

server selects the longest prefix match.

The rapid-commit keyword enables the use of the two-message exchange.

If the preference keyword is configured with a value other than 0, the server adds a preference option

to carry the preference value for the advertise messages. This action affects the selection of a server by

the client. Any advertise message that does not include a preference option is considered to have a

preference value of 0. If the client receives an advertise message with a preference value of 255, the

client immediately sends a request message to the server from which the message was received.

If the allow-hint keyword is specified, the server allocates a valid client-suggested address in the solicit

and request messages. The prefix address is valid if it is in the associated local prefix address pool and

it is not assigned to a device. If the allow-hint keyword is not specified, the server ignores the client hint,

and an address is allocated from the free list in the pool.

The DHCPv6 client, server, and relay functions are mutually exclusive on an interface. When one of

these functions is already enabled and you try to configure a different function on the same interface, the

switch returns one of these messages:

Interface is in DHCP client mode

Interface is in DHCP server mode

Interface is in DHCP relay mode

This example enables DHCPv6 for the pool named testgroup:

Switch(config-if)# ipv6 dhcp server testgroup

ipv6 dhcp pool

show ipv6 dhcp

manuals search engine

Configures a DHCPv6 pool and enters DHCPv6 pool configuration mode.

Displays DHCPv6 interface information.

Catalyst 3750-X and 3560-X Switch Command Reference

ipv6 dhcp server

Catalyst 3750-x