Syntax no ipv6 nd suppress-ra | Brocade Communications Systems 6650

IPv6 neighbor discovery configuration

Setting flags in IPv6 router advertisement messages

An IPv6 router advertisement message can include the following flags:

•Managed Address Configuration—This flag indicates to hosts on a local link if they should use the stateful autoconfiguration feature to get IPv6 addresses for their interfaces. If the flag is set, the hosts use stateful autoconfiguration to get addresses as well as non-IPv6-address information. If the flag is not set, the hosts do not use stateful autoconfiguration to get addresses and if the hosts can get non-IPv6-address information from stateful autoconfiguration is determined by the setting of the Other Stateful Configuration flag.

•Other Stateful Configuration—This flag indicates to hosts on a local link if they can get non-IPv6 address autoconfiguration information. If the flag is set, the hosts can use stateful autoconfiguration to get non-IPv6-address information.

NOTE

When determining if hosts can use stateful autoconfiguration to get non-IPv6-address information, a set Managed Address Configuration flag overrides an unset Other Stateful Configuration flag. In this situation, the hosts can obtain nonaddress information. However, if the Managed Address Configuration flag is not set and the Other Stateful Configuration flag is set, then the setting of the Other Stateful Configuration flag is used.

By default, the Managed Address Configuration and Other Stateful Configuration flags are not set in router advertisement messages. For example, to set these flags in router advertisement messages sent from Ethernet interface 1/1/1, enter the following commands.

Brocade(config)#interface ethernet 1/1/1

Brocade(config-if-e10000-1/1/1)#ipv6 nd managed-config-flag

Brocade(config-if-e10000-1/1/1)#ipv6 nd other-config-flag

Syntax: [no] ipv6 nd managed-config-flag

Syntax: [no] ipv6 nd other-config-flag

To remove either flag from router advertisement messages sent on an interface, use the no form of the respective command.

Enabling and disabling IPv6 router advertisements

If IPv6 unicast routing is enabled on an Ethernet interface, by default, this interface sends IPv6 router advertisement messages. However, by default, non-LAN interface types, for example, tunnel interfaces, do not send router advertisement messages.

To disable the sending of router advertisement messages on an Ethernet interface, enter commands such as the following.

Brocade(config)#interface ethernet 1/1/1

Brocade(config-if-e10000-1/1/1)#ipv6 nd suppress-ra

To enable the sending of router advertisement messages on a tunnel interface, enter commands such as the following.

Brocade(config)#interface tunnel 1

Brocade(config-tnif-1)#no ipv6 nd suppress-ra