Brocade Communications Systems FastIron SX 1600, Configuration Manual, Page: 173 / 593

The max-range-value parameter specifies the maximum number of seconds allowed between sending unsolicited multicast router
advertisements from the interface. This number can be between 4 - 1800 seconds and must be greater than the min-range-value x
1.33. The default is 600 seconds.
The ipv6 nd ra-lifetime number is a value between 0 - 9000 seconds. To restore the router lifetime value of 1800 seconds, use the no
form of the command.
The ipv6 nd ra-hop-limit number is a value from 0 - 255. The default is 64.
NOTE
By default, router advertisements will always have the MTU option. To suppress the MTU option, use the following command at
the Interface level of the CLI:
ipv6 nd suppress-mtu-option .
Prefixes advertised in IPv6 router advertisement messages
By default, router advertisement messages include prefixes configured as addresses on router interfaces using the ipv6 address
command. You can use the ipv6 nd prefix-advertisement command to control exactly which prefixes are included in router
advertisement messages. Along with which prefixes the router advertisement messages contain, you can also specify the following
parameters:
• Valid lifetime --(Mandatory) The time interval (in seconds) in which the specified prefix is advertised as valid. The default is
2592000 seconds (30 days). When the timer expires, the prefix is no longer considered to be valid.
• Preferred lifetime --(Mandatory) The time interval (in seconds) in which the specified prefix is advertised as preferred. The
default is 604800 seconds (7 days). When the timer expires, the prefix is no longer considered to be preferred.
• Onlink flag --(Optional) If this flag is set, the specified prefix is assigned to the link upon which it is advertised. Nodes sending
traffic to addresses that contain the specified prefix consider the destination to be reachable on the local link.
• Autoconfiguration flag --(Optional) If this flag is set, the stateless auto configuration feature can use the specified prefix in the
automatic configuration of 128-bit IPv6 addresses for hosts on the local link, provided the specified prefix is aggregatable, as
specified in RFC 2374.
For example, to advertise the prefix 2001:DB8:a487:7365::/64 in router advertisement messages sent out on Ethernet interface 1/3/1
with a valid lifetime of 1000 seconds, a preferred lifetime of 800 seconds, and the Onlink and Autoconfig flags set, enter the following
commands.
device(config)#interface ethernet 1/3/1
device(config-if-e1000-1/3/1)#ipv6 nd prefix-advertisement 2001:DB8:a487:7365::/64 1000 800 onlink
autoconfig
Syntax: [no] ipv6 nd prefix-advertisement ipv6-prefix / prefix-length valid-lifetime preferred-lifetime [ autoconfig ] [ onlink ]
You must specify the ipv6-prefix parameter in hexadecimal using 16-bit values between colons as documented in RFC 2373.
You must specify the prefix-length parameter as a decimal value. A slash mark (/) must follow the ipv6-prefix parameter and precede the
prefix-length parameter.
The valid lifetime and preferred lifetime is a numerical value between 0 - 4294967295 seconds. The default valid lifetime is 2592000
seconds (30 days), while the default preferred lifetime is 604800 seconds (7 days).
To remove a prefix from the router advertisement messages sent from a particular interface, use the no form of this command.
IPv6 neighbor discovery configuration
FastIron Ethernet Switch Layer 3 Routing
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