R1(config)#router isis
R1(config-router)#net 49.000a.0000.0000.0001.00
R1(config-router)#is-type level-1
R1(config-router)#exit

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 10.1.13.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#ip router isis
R1(config-if)#end

R2(config-router)#net 49.000a.0000.0000.0002.00
R2(config-router)#is-type level-1
R2(config-router)#exit

R2(config)#int fa0/0
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-if)#exit

R2(config)#int lo0
R2(config-if)#ip add 2.2.2.2
R2(config-if)#ip add 2.2.2.2 255.255.255.0
R2(config-if)#ip router isis
R2(config-if)#end

R3(config)#router isis
R3(config-router)#net 49.000a.0000.0000.0003.00
R3(config-router)#is-type level-1-2
R3(config-router)#exit

R3(config)#int fa1/0
R3(config-if)#ip add 10.1.13.3 255.255.255.0
R3(config-if)#no shut
R3(config-if)#ip router isis
R3(config-if)#exit
R3(config)#int fa2/0
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)#
R3(config)#int fa0/0
R3(config-if)#ip add 10.1.34.3 255.255.255.0
R3(config-if)#no shut
R3(config-if)#ip router isis
R3(config-if)#end

R3(config)#int lo0
R3(config-if)#ip add 3.3.3.3 255.255.255.0
R3(config-if)#no shut
R3(config-if)#ip router isis
R3(config-if)#end

R4(config)#router isis
R4(config-router)#net 49.000b.0000.0000.0004.00
R4(config-router)#is-type level-1-2
R4(config-router)#exit

R4(config)#int fa0/0
R4(config-if)#ip add 10.1.34.4 255.255.255.0
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)#int fa2/0
R4(config-if)#ip add 10.1.46.4 255.255.255.0
R4(config-if)#no shut
R4(config-if)#ip router isis
R4(config-if)#end
R4(config)#int lo0
R4(config-if)#ip add 4.4.4.4 255.255.255.0
R4(config-if)#no shut
R4(config-if)#ip router isis
R4(config-if)#end

R5(config)#router isis
R5(config-router)#net 49.000b.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)#no shut
R5(config-if)#ip router isis
R5(config-if)#exit
R5(config)#int fa0/0
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)#end

R6(config)#router isis
R6(config-router)#net 49.000b.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)#no shut
R6(config-if)#ip router isis
R6(config-if)#exit
R6(config)#int fa0/0
R6(config-if)#ip add 10.1.46.6 255.255.255.0
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
R3             L1   Fa0/0     10.1.13.3       UP    7        R3.01             

R2#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id
R3             L1   Fa0/0     10.1.23.3       UP    6        R3.02       

R3#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id
R4             L2   Fa0/0     10.1.34.4       UP    7        R4.01             
R2             L1   Fa2/0     10.1.23.2       UP    22       R3.02             
R1             L1   Fa1/0     10.1.13.1       UP    27       R3.01 

R4#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id
R5             L1   Fa1/0     10.1.45.5       UP    7        R5.02             
R6             L1   Fa2/0     10.1.46.6       UP    9        R6.02             
R3             L2   Fa0/0     10.1.34.3       UP    29       R4.01             

R5#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id
R4             L1   Fa0/0     10.1.45.4       UP    24       R5.02  

R6#sh isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id
R4             L1   Fa0/0     10.1.46.4       UP    29       R6.02          

R1#sho isis topology

IS-IS paths to level-1 routers
System Id            Metric     Next-Hop             Interface   SNPA
R1                   --
R2                   20         R3                   Fa0/0       cc03.0a04.0010
R3                   10         R3                   Fa0/0       cc03.0a04.0010

R1#sho ip route isis
     2.0.0.0/24 is subnetted, 1 subnets
i L1    2.2.2.0 [115/30] via 10.1.13.3, FastEthernet0/0
     3.0.0.0/24 is subnetted, 1 subnets
i L1    3.3.3.0 [115/20] via 10.1.13.3, FastEthernet0/0
     10.0.0.0/24 is subnetted, 3 subnets
i L1    10.1.23.0 [115/20] via 10.1.13.3, FastEthernet0/0
i L1    10.1.34.0 [115/20] via 10.1.13.3, FastEthernet0/0
i*L1 0.0.0.0/0 [115/10] via 10.1.13.3, FastEthernet0/0

R2#sho ip route isis
     1.0.0.0/24 is subnetted, 1 subnets
i L1    1.1.1.0 [115/30] via 10.1.23.3, FastEthernet0/0
     3.0.0.0/24 is subnetted, 1 subnets
i L1    3.3.3.0 [115/20] via 10.1.23.3, FastEthernet0/0
     10.0.0.0/24 is subnetted, 3 subnets
i L1    10.1.13.0 [115/20] via 10.1.23.3, FastEthernet0/0
i L1    10.1.34.0 [115/20] via 10.1.23.3, FastEthernet0/0
i*L1 0.0.0.0/0 [115/10] via 10.1.23.3, FastEthernet0/0

R3#sho isis topology

IS-IS paths to level-1 routers
System Id            Metric     Next-Hop             Interface   SNPA
R1                   10         R1                   Fa1/0       cc01.0a00.0000
R2                   10         R2                   Fa2/0       cc02.0a02.0000
R3                   --

IS-IS paths to level-2 routers
System Id            Metric     Next-Hop             Interface   SNPA
R3                   --
R4                   10         R4                   Fa0/0       cc04.0a07.0000

R3#sho ip route isis
     1.0.0.0/24 is subnetted, 1 subnets
i L1    1.1.1.0 [115/20] via 10.1.13.1, FastEthernet1/0
     2.0.0.0/24 is subnetted, 1 subnets
i L1    2.2.2.0 [115/20] via 10.1.23.2, FastEthernet2/0
     4.0.0.0/24 is subnetted, 1 subnets
i L2    4.4.4.0 [115/20] via 10.1.34.4, FastEthernet0/0
     5.0.0.0/24 is subnetted, 1 subnets
i L2    5.5.5.0 [115/30] via 10.1.34.4, FastEthernet0/0
     6.0.0.0/24 is subnetted, 1 subnets
i L2    6.6.6.0 [115/30] via 10.1.34.4, FastEthernet0/0
     10.0.0.0/24 is subnetted, 5 subnets
i L2    10.1.46.0 [115/20] via 10.1.34.4, FastEthernet0/0
i L2    10.1.45.0 [115/20] via 10.1.34.4, FastEthernet0/0

R4#sho isis topology

IS-IS paths to level-1 routers
System Id            Metric     Next-Hop             Interface   SNPA
R4                   --
R5                   10         R5                   Fa1/0       cc05.0a09.0000
R6                   10         R6                   Fa2/0       cc06.0a0b.0000

IS-IS paths to level-2 routers
System Id            Metric     Next-Hop             Interface   SNPA
R3                   10         R3                   Fa0/0       cc03.0a04.0000
R4                   --

R4#sh ip route isis
     1.0.0.0/24 is subnetted, 1 subnets
i L2    1.1.1.0 [115/30] via 10.1.34.3, FastEthernet0/0
     2.0.0.0/24 is subnetted, 1 subnets
i L2    2.2.2.0 [115/30] via 10.1.34.3, FastEthernet0/0
     3.0.0.0/24 is subnetted, 1 subnets
i L2    3.3.3.0 [115/20] via 10.1.34.3, FastEthernet0/0
     5.0.0.0/24 is subnetted, 1 subnets
i L1    5.5.5.0 [115/20] via 10.1.45.5, FastEthernet1/0
     6.0.0.0/24 is subnetted, 1 subnets
i L1    6.6.6.0 [115/20] via 10.1.46.6, FastEthernet2/0
     10.0.0.0/24 is subnetted, 5 subnets
i L2    10.1.13.0 [115/20] via 10.1.34.3, FastEthernet0/0
i L2    10.1.23.0 [115/20] via 10.1.34.3, FastEthernet0/0

R5#sho isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id
R4             L1   Fa0/0     10.1.45.4       UP    24       R5.02             
R5#sho ip route isis
     4.0.0.0/24 is subnetted, 1 subnets
i L1    4.4.4.0 [115/20] via 10.1.45.4, FastEthernet0/0
     6.0.0.0/24 is subnetted, 1 subnets
i L1    6.6.6.0 [115/30] via 10.1.45.4, FastEthernet0/0
     10.0.0.0/24 is subnetted, 3 subnets
i L1    10.1.46.0 [115/20] via 10.1.45.4, FastEthernet0/0
i L1    10.1.34.0 [115/20] via 10.1.45.4, FastEthernet0/0
i*L1 0.0.0.0/0 [115/10] via 10.1.45.4, FastEthernet0/0

R6#sh ip route isis
     4.0.0.0/24 is subnetted, 1 subnets
i L1    4.4.4.0 [115/20] via 10.1.46.4, FastEthernet0/0
     5.0.0.0/24 is subnetted, 1 subnets
i L1    5.5.5.0 [115/30] via 10.1.46.4, FastEthernet0/0
     10.0.0.0/24 is subnetted, 3 subnets
i L1    10.1.45.0 [115/20] via 10.1.46.4, FastEthernet0/0
i L1    10.1.34.0 [115/20] via 10.1.46.4, FastEthernet0/0
i*L1 0.0.0.0/0 [115/10] via 10.1.46.4, FastEthernet0/0

R6#ping 1.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/32/44 ms

R1#ping 4.4.4.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/44/56 ms
R1#ping 5.5.5.5

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.5, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 20/49/92 ms

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 = 48/62/72 ms

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