Brocade BigIron RX Series Configuration Guide - Manual (Page 1261)

BigIron RX Series Configuration Guide 1183
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Configuring IPv6 neighbor discovery
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Disabling or reenabling ICMP redirect messages
You can disable or re-enable the sending of ICMP redirect messages by a router. By default, a
router can send an ICMP redirect message to a neighboring host to inform it of a better first-hop
router on a path to a destination. No further configuration is required to enable the sending of
ICMP redirect messages. (For more information about how ICMP redirect messages are
implemented for IPv6, refer to
“Configuring IPv6 neighbor discovery” on page 1183.)
For example, to disable the sending of ICMP redirect messages on Ethernet interface 3/1, enter
the following commands.
BigIron RX(config)# interface ethernet 3/1
BigIron RX(config-if-e100-3/1)# no ipv6 redirects
Syntax: [no] ipv6 redirects
To re-enable the sending of ICMP redirect messages on Ethernet interface 3/1, enter the following
commands.
BigIron RX(config)# interface ethernet 3/1
BigIron RX(config-if-e100-3/1)# ipv6 redirects
Use the show ipv6 interface <interface> <port-number> command to verify that the sending of
ICMP redirect messages is enabled on a particular interface.
Configuring IPv6 neighbor discovery
The neighbor discovery feature for IPv6 uses IPv6 ICMP messages to do the following:
• 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:
• Interval between router advertisement messages.
• Value that indicates a router is advertised as a default router (for use by all nodes on a
given link).
• Prefixes advertised in router advertisement messages.
• Flags for host stateful autoconfiguration.