Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 744)

716 Multi-Service IronWare Routing Configuration Guide
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Configuring IPv6 specific address family route parameters
NOTE
The route map must be configured before you can use the route map as a parameter with the
default-information-originate command.
To use a route map to configure the device to advertise a default route to Level 1, enter commands
such as the following at the Global CONFIG level:
Brocade(config)# route-map default_level1 permit 1
Brocade(config-routemap default_level1)# set level level-1
Brocade(config-routemap default_level1)# router isis
Brocade(config-isis-router)# address-family ipv6 unicast
Brocade(config-isis-router-ipv6u)# default-information-originate route-map
default_level1
These commands configure a route map to set the default advertisement level to Level 1 only.
Syntax: [no] route-map map-name permit | deny sequence-number
Syntax: [no] set level level-1 | level-1-2 | level-2
For this use of a route map, use the permit option and do not specify a match statement. Specify a
set statement to set the level to one of the following:
• level-1 – Level 1 only.
• level-1-2 – Level 1 and Level 2.
• level-2 – Level 2 only (default).
Changing the administrative distance for IPv6 IS-IS
When the device has paths from multiple routing protocols to the same destination, it compares
the administrative distances of the paths and selects the path with the lowest administrative
distance to place in the IPv6 route table.
For example, if the device has a path from RIPng, from OSPFv3, and IPv6 IS-IS to the same
destination, and all the paths are using their protocols’ default administrative distances, the device
selects the OSPFv3 path, because that path has a lower administrative distance than the RIPng
and IPv6 IS-IS paths.
Here are the default IPv6 administrative distances on the device:
• Directly connected – 0 (this value is not configurable)
• Static – 1 (applies to all static routes, including default routes)
• EBGP – 20
• OSPFv3 – 110
• IPv6 IS-IS – 115
• RIPng – 120
• IBGP – 200
• Local BGP – 200
• Unknown – 255 (the device will not use this route)
Lower administrative distances are preferred over higher distances. For example, if the device
receives routes for the same network from IPv6 IS-IS and from RIPng, it will prefer the IPv6 IS-IS
route by default.