Brocade Communications Systems 6650 manual IPv6 neighbor discovery configuration

IPv6 neighbor discovery configuration 5

Enabling IPv6 ICMP redirect messages

NOTE

This feature is supported only with the IPv6 Layer 3 PROM and the full Layer 3 image.

You can enable a Layer 3 switch to send an IPv6 ICMP redirect message to a neighboring host to inform it of a better first-hop router on a path to a destination. By default, the sending of IPv6 ICMP redirect messages by a Layer 3 switch is disabled. (For more information about how ICMP redirect messages are implemented for IPv6, refer to “IPv6 neighbor discovery configuration” on

page 129.)

NOTE

This feature is supported on Virtual Ethernet (VE) interfaces only.

For example, to enable the sending of IPv6 ICMP redirect messages on VE 2, enter the following commands.

Brocade(config)#interface ve2

Brocade(config-vif-2)#ipv6 redirects

To disable the sending of IPv6 ICMP redirect messages after it has been enabled on VE 2, enter the following commands.

Brocade(config)#interface ve2

Brocade(config-vif-2)#no ipv6 redirects

Syntax: [no] ipv6 redirects

Use the show ipv6 interface command to verify that the sending of IPv6 ICMP redirect messages is enabled on a particular interface.

IPv6 neighbor discovery configuration

The neighbor discovery feature for IPv6 uses IPv6 ICMP messages to do the following tasks:

•Determine the link-layer address of a neighbor on the same link.

•Verify that a neighbor is reachable.

•Track neighbor routers.

An IPv6 host is required to listen for and recognize the following addresses that identify itself:

•Link-local address.

•Assigned unicast address.

•Loopback address.

•All-nodes multicast address.

•Solicited-node multicast address.

•Multicast address to all other groups to which it belongs. You can adjust the following IPv6 neighbor discovery features:

•Neighbor solicitation messages for duplicate address detection.

•Router advertisement messages:

Brocade ICX 6650 Administration Guide	129
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