Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 750)

722 Multi-Service IronWare Routing Configuration Guide
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Configuring IPv6 specific address family route parameters
NOTE
The device automatically redistributes Level 1 routes into Level 2 routes, even if you do not enable
redistribution.
For example, to redistribute all IPv6 IS-IS routes from Level 2 into Level 1, enter the following
command at the IPv6 IS-IS unicast address family configuration level.
Brocade(config-isis-router-ipv6u)# redistribute isis level-2 into level-1
The device automatically redistributes Level-1 routes into Level 2.
Syntax: [no] redistribute isis level-1 into level-2 | level-2 into level-1 [prefix-list name]
The level-1 into level-2 | level-2 into level-1 parameter specifies the direction of the redistribution:
• level-1 into level-2 – Redistributes Level 1 routes into Level 2. This is the default.
• level-2 into level-1 – Redistributes Level 2 routes into Level 1.
The optional prefix-list name parameter allows you to specify the IPv6 prefixes that you want
redistributed from Level 1 into Level 2 and from Level 2 into Level 1. Specify the name of the IPv6
prefix list that contains the desired prefixes.
For example, to redistribute the IPv6 prefix 2001:db8::/32 from Level 2 into Level 1, enter
commands such as the following.
Brocade(config)# ipv6 prefix-list routesfor2001 permit 2001:db8::/32
Brocade(config)# router isis
Brocade(config-isis-router)# address-family ipv6 unicast
Brocade(config-isis-router-ipv6u)# redistribute isis level-2 into level-1
prefix-list routesfor2001
Disabling and re-enabling IPv6 protocol-support
consistency checks
As discussed in “IPv6 IS-IS single-topology mode” on page 710, an IS-IS single topology must be
configured to run the same set of network protocols (IPv4 IS-IS only, IPv6 IS-IS only, or both IPv4
IS-IS and IPv6 IS-IS).
By default, IS-IS performs consistency checks on hello packets. If a hello packet does not have the
same configured network protocols, IS-IS rejects the packet. For example, a hello packet from a
router running IPv4 and IPv6 IS-IS will be rejected by a router running either IPv4 IS-IS only or IPv6
IS-IS only, and the two routers will not become adjacent.
To allow two routers running different sets of network protocols to form an adjacency, enter the
following command at the IPv6 IS-IS unicast address family configuration level.
Brocade(config-isis-router-ipv6u)# no adjacency-check
This command disables the IPv6 IS-IS consistency check.
Syntax: [no] adjacency-check
To re-enable the consistency check, enter the following command at the IPv6 IS-IS unicast address
family configuration level.
Brocade(config-isis-router-ipv6u)# adjacency-check