Brocade ICX 6650 Administration Guide 135
53-1002600-01
IPv6 neighbor discovery configuration 5
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
Syntax: [no] ipv6 nd suppress-ra