536 | Intermediate System to Intermediate System
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Figure 23-10.  IS-IS Sample Configuration
Router 1
R1(conf)#interface Loopback 0
R1(conf-if-lo-0)#ip address 192.168.1.1/24
R1(conf-if-lo-0)#ipv6 address 2001:db8:9999:1::/48
R1(conf-if-lo-0)#ip router isis 9999
R1(conf-if-lo-0)#no shutdown
R1(conf-if-lo-0)#router isis 9999
R1(conf-router_isis)#is-type level-1
R1(conf-router_isis)#net FF.F101.0002.0C00.1111.00
R1(conf-router_isis)#ipv6 route 2001:db8:9999:2::/128 2001:db8:1021:2::
R1(conf)#ipv6 route 2001:db8:9999:3::/128 2001:db8:1022:3::
R1(conf)#ip route 192.168.1.2/32 10.0.12.2
R1(conf)#ip route 192.168.1.3/32 10.0.13.3
R1(conf)#interface GigabitEthernet 1/21
R1(conf-if-gi-1/21)#ip address 10.0.12.1/24
R1(conf-if-gi-1/21)#ipv6 address 2001:db8:1022:1::/48
R1(conf-if-gi-1/21)#isis circuit-type level-1
R1(conf-if-gi-1/21)#isis network point-to-point
R1(conf-if-gi-1/21)#ip router isis 9999
R1(conf-if-gi-1/21)#no shutdown
R1(conf-if-gi-1/21)#interface GigabitEthernet 1/34
R1(conf-if-gi-1/34)# ip address 10.0.13.1/24
R1(conf-if-gi-1/34)#ipv6 address 2001:db8:1021:1::/48
R1(conf-if-gi-1/34)#ip router isis 9999
R1(conf-if-gi-1/34)#no shutdown
R1(conf-if-gi-1/34)#end
R1#show ip route
Codes: C - connected, S - static, R - RIP,
       B - BGP, IN - internal BGP, EX - external BGP,LO - Locally Originated,
       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, L1 - IS-IS level-1,
       L2 - IS-IS level-2, IA - IS-IS inter area, * - candidate default,
       > - non-active route, + - summary route
Gateway of last resort is not set
       Destination        Gateway                      Dist/Metric Last Change
       -----------        -------                      ----------- -----------
  C    10.0.12.0/24       Direct, Gi 1/21                      0/0    00:00:57
  C    192.168.1.0/24     Direct, Lo 0                         0/0    00:04:19
  S    192.168.1.2/32     via 10.0.12.2, Gi 1/21               1/0    00:00:57
R1#show isis data
IS-IS Level-1 Link State Database
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
R1.00-00          * 0x0000000F   0x3A6C        1176              0/0/0
R1.02-00          * 0x00000002   0x90AC        1076              0/0/0
R1.03-00          * 0x00000002   0x67C3        1176              0/0/0
R2.00-00            0x0000000C   0x5418        1183              0/0/0
R2.00-00            0x00000009   0x1E39        1183              0/0/0
R2.03-00            0x00000002   0x589D        1180              0/0/0
R1#show isis neigh
System Id      Interface State     Type Priority Uptime            Circuit Id
R2             Gi 1/21   Up        L1    64      00:02:28          R1.02
R2             Gi 1/34   Up        L1    64      00:00:42          R1.03
R1#