Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 745)

Multi-Service IronWare Routing Configuration Guide 717
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Configuring IPv6 specific address family route parameters
To change the administrative distance for IPv6 IS-IS routes, enter the following command at the
IPv6 IS-IS unicast address family configuration level:
Brocade(config-isis-router-ipv6u)# distance 100
Syntax: [no] distance number
This command changes the administrative distance for all IPv6 IS-IS routes to 100.
The number parameter specifies the administrative distance. You can specify a value from 1 –
255. (Routes with a distance value of 255 are not installed in the routing table.) The default for
IPv6 IS-IS is 115.
Configuring summary prefixes
You can configure summary prefixes to aggregate IPv6 IS-IS route information. Summary prefixes
can enhance performance by reducing the size of the Link State database, reducing the amount of
data a router needs to send to its neighbors, and reducing the CPU cycles used for IPv6 IS-IS.
When you configure a summary prefix, the prefix applies only to Level-2 routes by default. You can
specify Level-1 only, Level-2 only, or Level-1 and Level-2 when you configure the prefix.
For example, to configure a summary prefix of 2001:db8::/32 to be advertised to Level-1 routes
only, enter the following command at the IPv6 IS-IS unicast address family configuration level:
Brocade(config-isis-router-ipv6u)# summary-prefix 2001:db8::/32 level-1
Syntax: [no] summary-prefix ipv6-prefix/prefix-length [level-1 | level-1-2 | level-2-only]
The ipv6-prefix/prefix-length parameter specifies the aggregate address. 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 level-1 | level-1-2 | level-2-only parameter specifies the route types to which the aggregate
route applies. The default is level-2-only.
Redistributing routes into IPv6 IS-IS
To redistribute routes into IPv6 IS-IS, you can perform the following configuration tasks:
• Change the default redistribution metric (optional).
• Configure the redistribution of a particular route type into IPv6 IS-IS (mandatory).
The device can redistribute routes from the following route sources into IPv6 IS-IS:
• BGP4+.
• RIPng.
• OSPFv3.
• Static IPv6 routes.
• IPv6 routes learned from directly connected networks.
The device can also can redistribute Level-1 IPv6 IS-IS routes into Level-2 IPv6 IS-IS routes, and
Level-2 IPv6 IS-IS routes into Level-1 IPv6 IS-IS routes.