R1#
R1#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        10.0.0.0/24 is directly connected, FastEthernet0/0
L        10.0.0.1/32 is directly connected, FastEthernet0/0
      11.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        11.0.0.0/24 is directly connected, FastEthernet0/1
L        11.0.0.1/32 is directly connected, FastEthernet0/1
      12.0.0.0/24 is subnetted, 1 subnets
i L2     12.0.0.0 [115/20] via 11.0.0.6, 00:18:22, FastEthernet0/1
      13.0.0.0/24 is subnetted, 1 subnets
i L2     13.0.0.0 [115/20] via 11.0.0.6, 00:18:22, FastEthernet0/1
      172.16.0.0/24 is subnetted, 1 subnets
i L2     172.16.0.0 [115/20] via 11.0.0.6, 00:18:32, FastEthernet0/1
      172.17.0.0/24 is subnetted, 1 subnets
i L2     172.17.0.0 [115/20] via 11.0.0.6, 00:17:45, FastEthernet0/1
      172.18.0.0/24 is subnetted, 1 subnets
i L2     172.18.0.0 [115/20] via 11.0.0.6, 00:18:22, FastEthernet0/1
i L2  192.168.0.0/24 [115/20] via 10.0.0.2, 00:18:22, FastEthernet0/0
i L2  192.168.1.0/24 [115/30] via 10.0.0.2, 00:18:22, FastEthernet0/0
i L2  192.168.2.0/24 [115/20] via 10.0.0.2, 00:18:22, FastEthernet0/0
R1#
R1#sh isis topology


IS-IS TID 0 paths to level-2 routers
System Id            Metric     Next-Hop             Interface   SNPA
R1                   --
R2                   10         R2                   Fa0/0       ca01.0486.0008
R6                   10         R6                   Fa0/1       ca05.0486.0008
R1#
R1#sh isis neighbors

System Id      Type Interface   IP Address      State Holdtime Circuit Id
R2             L2   Fa0/0       10.0.0.2        UP    7        R2.01
R6             L2   Fa0/1       11.0.0.6        UP    9        R6.01
R1#