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Implementing IS-IS on Cisco IOS XR Software
Configuration Examples for Implementing IS-IS on Cisco IOS XR Software
RC-123
Cisco IOS XR Routing Configuration Guide
address-family ipv4 unicast
!
address-family ipv6 unicast
!
exit
!
interface POS0/3/0/0
ipv4 address 10.0.1.3 255.255.255.0
ipv6 address 2001::1/64
Configuring Multitopology IS-IS for IPv6: Example
The following example shows multitopology IS-IS being configured in IPv6. You need not enable IS-IS
for IPv6 globally on the router.
router isis isp
net 49.0000.0000.0001.00
interface POS0/3/0/0
address-family ipv6 unicast
metric-style wide level 1
exit
!
interface POS0/3/0/0
ipv6 address 2001::1/64
Redistributing IS-IS Routes Between Multiple Instances: Example
The following example shows the attached bit being set for a Level 1 instance. This example shows the
other Level 1 routers in the area being informed that this router is a suitable candidate to get from the
area to the backbone. The Level 1 instance is also propagating routes to the Level 2 instance using
redistribution. Note that the administrative distance is explicitly configured higher on the Level 2
instance to ensure that Level 1 routes are preferred.
router isis 1
is-type level-2-only
net 49.0001.0001.0001.0001.00
address-family ipv4 unicast
distance 116
redistribute isis 2 level 2
!
interface POS0/3/0/0
address-family ipv4 unicast
!
!
router isis 2
is-type level-1
net 49.0002.0001.0001.0002.00
address-family ipv4 unicast
set-attached-bit
!
interface POS0/1/0/0
address-family ipv4 unicast