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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#