RP/0/0/CPU0:XR1#sh route isis | i 3.3.3.3
i L2 3.3.3.3/32 [115/30] via 20.6.19.6, 00:29:27, GigabitEthernet0/1/0/0.619
RP/0/0/CPU0:XR1#sh route isis | i 4.4.4.4
i L2 4.4.4.4/32 [115/20] via 20.6.19.6, 00:29:36, GigabitEthernet0/1/0/0.619
i L2 3.3.3.3/32 [115/30] via 20.6.19.6, 00:29:27, GigabitEthernet0/1/0/0.619
RP/0/0/CPU0:XR1#sh route isis | i 4.4.4.4
i L2 4.4.4.4/32 [115/20] via 20.6.19.6, 00:29:36, GigabitEthernet0/1/0/0.619
Step 1: Create Route Policy
=====================
RP/0/0/CPU0:XR1#sh run route-policy ISIS
route-policy ISIS
if destination in (3.3.3.3/32, 4.4.4.4/32) then
pass
endif
end-policy
!
route-policy ISIS
if destination in (3.3.3.3/32, 4.4.4.4/32) then
pass
endif
end-policy
!
Step 2: Map The Policy To ISIS Process
==============================
RP/0/0/CPU0:XR1#sh run router isis
router isis 1
net 49.1920.0000.0000.0019.00
address-family ipv4 unicast
propagate level 2 into level 1 route-policy ISIS
!
interface Loopback0
passive
circuit-type level-2-only
address-family ipv4 unicast
!
!
interface GigabitEthernet0/1/0/0.519
circuit-type level-2-only
address-family ipv4 unicast
!
!
interface GigabitEthernet0/1/0/0.619
circuit-type level-2-only
address-family ipv4 unicast
!
!
interface POS0/6/0/0
circuit-type level-1
address-family ipv4 unicast
!
!
!
router isis 1
net 49.1920.0000.0000.0019.00
address-family ipv4 unicast
propagate level 2 into level 1 route-policy ISIS
!
interface Loopback0
passive
circuit-type level-2-only
address-family ipv4 unicast
!
!
interface GigabitEthernet0/1/0/0.519
circuit-type level-2-only
address-family ipv4 unicast
!
!
interface GigabitEthernet0/1/0/0.619
circuit-type level-2-only
address-family ipv4 unicast
!
!
interface POS0/6/0/0
circuit-type level-1
address-family ipv4 unicast
!
!
!
Verification
=========
Before on XR2
===========
RP/0/3/CPU0:XR2#sh ip route isis
i*L1 0.0.0.0/0 [115/10] via 10.19.20.19, 00:23:22, POS0/7/0/0
After on XR2
i*L1 0.0.0.0/0 [115/10] via 10.19.20.19, 00:23:22, POS0/7/0/0
After on XR2
==========
RP/0/3/CPU0:XR2#sh ip route isis
i*L1 0.0.0.0/0 [115/10] via 10.19.20.19, 00:23:46, POS0/7/0/0
i ia 3.3.3.3/32 [115/40] via 10.19.20.19, 00:00:05, POS0/7/0/0
i ia 4.4.4.4/32 [115/30] via 10.19.20.19, 00:00:05, POS0/7/0/0
Other Relevant Configuration
======================
RP/0/3/CPU0:XR2#sh run router isis
router isis 1
is-type level-1
net 49.1920.0000.0000.0020.00
interface Loopback0
passive
address-family ipv4 unicast
!
!
interface POS0/7/0/0
address-family ipv4 unicast
!
!
!
router isis 1
is-type level-1
net 49.1920.0000.0000.0020.00
interface Loopback0
passive
address-family ipv4 unicast
!
!
interface POS0/7/0/0
address-family ipv4 unicast
!
!
!
Deepak Arora
Evil CCIE
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