ISIS BASIC

R1(config)#

router isis

 net 49.0001.0000.0000.0001.00

 is-type level-1

R1(config)#int lo0

R1(config-if)#ip add 1.1.1.1 255.255.255.0

R1(config-if)#ip router isis

R1(config-if)#exit

R1(config)#int fa0/0

R1(config-if)#ip add 10.1.12.1 255.255.255.0

R1(config-if)#no shut

R1(config-if)#ip router isis

R2(config)#router isis

R2(config-router)#net 49.0001.0000.0000.0002.00

R2(config-router)#is-type level-1

R2(config-router)#exit

R2(config)#int lo0

R2(config-if)#ip add

R2(config-if)#ip add 2.2.2.2 255.255.255.0

R2(config-if)#ip router isis

R2(config-if)#exit

R2(config)#int fa0/0

R2(config-if)#ip add 10.1.12.2 255.255.255.0

R2(config-if)#no shut

R2(config-if)#ip router isis

R2(config-if)#exit

R2(config)#int fa1/0

R2(config-if)#ip add 10.1.23.2 255.255.255.0

R2(config-if)#no shut

R2(config-if)#ip router isis

R2(config-if)#exit

R2(config)#int fa2/0

R2(config-if)#ip add 10.1.24.2 255.255.255.0

R2(config-if)#no shut

R2(config-if)#ip router isis

R3(config)#router isis

R3(config-router)#net 49.0001.0000.0000.0003.00

R3(config-router)#is-type level-1

R3(config-router)#exit

R3(config)#int lo0

R3(config-if)#ip add 3.3.3.3 255.255.255.0

R3(config-if)#ip router isis

R3(config-if)#exit

R3(config)#int fa0/0

R3(config-if)#ip add 10.1.23.3 255.255.255.0

R3(config-if)#no shut

R3(config-if)#ip router isis

R3(config-if)#exit

R3(config)#int fa1/0

R3(config-if)#ip add 10.1.35.3 255.255.255.0

R3(config-if)#no shut

R3(config-if)#ip router isis

R3(config-if)#exit

R4(config)#router isis

R4(config-router)#net 49.0001.0000.0000.0004.00

R4(config-router)#is-type level-1

R4(config-router)#exit

R4(config)#int lo0

R4(config-if)#ip add 4.4.4.4 255.255.255.0

R4(config-if)#ip router isis

R4(config-if)#exit

R4(config)#int fa0/0

R4(config-if)#ip add 10.1.24.4 255.255.255.0 

R4(config-if)#no shut

R4(config-if)#ip router isis

R4(config-if)#exit

R4(config)#int fa1/0

R4(config-if)#ip add 10.1.45.4 255.255.255.0

R4(config-if)#no shut

R4(config-if)#ip router isis

R4(config-if)#exit

R4(config)#end

R5(config)#router isis

R5(config-router)#net 49.0001.0000.0000.0005.00

R5(config-router)#is-type level-1

R5(config-router)#exit

R5(config)#int lo0

R5(config-if)#ip add 5.5.5.5 255.255.255.0

R5(config-if)#ip router isis

R5(config-if)#exit

R5(config)#int fa0/0

R5(config-if)#ip add 10.1.35.5 255.255.255.0

R5(config-if)#no shut

R5(config-if)#ip router isis

R5(config-if)#exit

R5(config)#int fa1/0

R5(config-if)#ip add 10.1.45.5 255.255.255.0

R5(config-if)#no shut

R5(config-if)#ip router isis

R5(config-if)#exit

R5(config)#int fa2/0

R5(config-if)#ip add 10.1.56.5 255.255.255.0

R5(config-if)#no shut

R5(config-if)#ip router isis

R5(config-if)#end

R6(config)#router isis

R6(config-router)#net 49.0001.0000.0000.0006.00

R6(config-router)#is-type level-1

R6(config-router)#exit

R6(config)#int lo0

R6(config-if)#ip add 6.6.6.6 255.255.255.0  

R6(config-if)#ip router isis

R6(config-if)#exit

R6(config)#int fa0/0

R6(config-if)#ip add 10.1.56.6 255.255.255.0

R6(config-if)#no shut

R6(config-if)#ip router isis

R6(config-if)#end

R1#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id

R2             L1   Fa0/0     10.1.12.2       UP    9        R2.02       

R2#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id

R4             L1   Fa2/0     10.1.24.4       UP    9        R4.02             

R3             L1   Fa1/0     10.1.23.3       UP    6        R3.02             

R1             L1   Fa0/0     10.1.12.1       UP    28       R2.02    

R3#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id

R5             L1   Fa1/0     10.1.35.5       UP    9        R5.02              

R2             L1   Fa0/0     10.1.23.2       UP    29       R3.02     

R4#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id

R5             L1   Fa1/0     10.1.45.5       UP    8        R5.03             

R2             L1   Fa0/0     10.1.24.2       UP    24       R4.02     

R5#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id

R6             L1   Fa2/0     10.1.56.6       UP    9        R6.02             

R4             L1   Fa1/0     10.1.45.4       UP    28       R5.03             

R3             L1   Fa0/0     10.1.35.3       UP    22       R5.02

R6#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id

R5             L1   Fa0/0     10.1.56.5       UP    25       R6.02     

R1#sho isis topology

IS-IS paths to level-1 routers

System Id            Metric     Next-Hop             Interface   SNPA

R1                   --

R2                   10         R2                   Fa0/0       cc02.012e.0000

R3                   20         R2                   Fa0/0       cc02.012e.0000

R4                   20         R2                   Fa0/0       cc02.012e.0000

R5                   30         R2                   Fa0/0       cc02.012e.0000

R6                   40         R2                   Fa0/0       cc02.012e.0000

R2#sho isis topology

IS-IS paths to level-1 routers

System Id            Metric     Next-Hop             Interface   SNPA

R1                   10         R1                   Fa0/0       cc01.012c.0000

R2                   --

R3                   10         R3                   Fa1/0       cc03.0130.0000

R4                   10         R4                   Fa2/0       cc04.0132.0000

R5                   20         R3                   Fa1/0       cc03.0130.0000

                                R4                   Fa2/0       cc04.0132.0000

R6                   30         R3                   Fa1/0       cc03.0130.0000

                                R4                   Fa2/0       cc04.0132.0000       

R3#sho isis topology

IS-IS paths to level-1 routers

System Id            Metric     Next-Hop             Interface   SNPA

R1                   20         R2                   Fa0/0       cc02.012e.0010

R2                   10         R2                   Fa0/0       cc02.012e.0010

R3                   --

R4                   20         R2                   Fa0/0       cc02.012e.0010

                                R5                   Fa1/0       cc05.0135.0000

R5                   10         R5                   Fa1/0       cc05.0135.0000

R6                   20         R5                   Fa1/0       cc05.0135.0000

R4#sho isis topology

IS-IS paths to level-1 routers

System Id            Metric     Next-Hop             Interface   SNPA

R1                   20         R2                   Fa0/0       cc02.012e.0020

R2                   10         R2                   Fa0/0       cc02.012e.0020

R3                   20         R2                   Fa0/0       cc02.012e.0020

                                R5                   Fa1/0       cc05.0135.0010

R4                   --

R5                   10         R5                   Fa1/0       cc05.0135.0010

R6                   20         R5                   Fa1/0       cc05.0135.0010

R5#sh isis topology

IS-IS paths to level-1 routers

System Id            Metric     Next-Hop             Interface   SNPA

R1                   30         R3                   Fa0/0       cc03.0130.0010

                                R4                   Fa1/0       cc04.0132.0010

R2                   20         R3                   Fa0/0       cc03.0130.0010

                                R4                   Fa1/0       cc04.0132.0010

R3                   10         R3                   Fa0/0       cc03.0130.0010

R4                   10         R4                   Fa1/0       cc04.0132.0010

R5                   --

R6                   10         R6                   Fa2/0       cc06.0136.0000

R6#sho isis topology

IS-IS paths to level-1 routers

System Id            Metric     Next-Hop             Interface   SNPA

R1                   40         R5                   Fa0/0       cc05.0135.0020

R2                   30         R5                   Fa0/0       cc05.0135.0020

R3                   20         R5                   Fa0/0       cc05.0135.0020

R4                   20         R5                   Fa0/0       cc05.0135.0020

R5                   10         R5                   Fa0/0       cc05.0135.0020

R6                   --

R1#sho ip route isis

     2.0.0.0/24 is subnetted, 1 subnets

i L1    2.2.2.0 [115/20] via 10.1.12.2, FastEthernet0/0

     3.0.0.0/24 is subnetted, 1 subnets

i L1    3.3.3.0 [115/30] via 10.1.12.2, FastEthernet0/0

     4.0.0.0/24 is subnetted, 1 subnets

i L1    4.4.4.0 [115/30] via 10.1.12.2, FastEthernet0/0

     5.0.0.0/24 is subnetted, 1 subnets

i L1    5.5.5.0 [115/40] via 10.1.12.2, FastEthernet0/0

     6.0.0.0/24 is subnetted, 1 subnets

i L1    6.6.6.0 [115/50] via 10.1.12.2, FastEthernet0/0

     10.0.0.0/24 is subnetted, 6 subnets

i L1    10.1.24.0 [115/20] via 10.1.12.2, FastEthernet0/0

i L1    10.1.23.0 [115/20] via 10.1.12.2, FastEthernet0/0

i L1    10.1.45.0 [115/30] via 10.1.12.2, FastEthernet0/0

i L1    10.1.35.0 [115/30] via 10.1.12.2, FastEthernet0/0

i L1    10.1.56.0 [115/40] via 10.1.12.2, FastEthernet0/0

R1#ping 6.6.6.6

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 6.6.6.6, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 72/86/104 ms