Configuration of the ISIS link state routing protocol used by the ISP

Features: Faster convergence speed, high stability, scalability default measures are 10

NSAP address is equivalent to the Router-id in OSPF is the only one! Get zone path via LSP]

Network-entity format: area = 49.0001, System ID = AAAA.BBBB.CCCC, Nsel = 00

Area: is a variable-length section with a range of 1-13 bytes.

System ID: Is the unique identifier of the IS or ES in the zone, which is 6 bytes in total, and can be converted using a MAC address or an IP address.

Nsel:service identifier, a total of one byte. (00 indicates in IP environment)

Afi=49 is a private address space, similar to a private IP address

r1>en

R1#conf T

R1 (config) #inter loop 0 configuration loop back port

R1 (config-if) #ip address 1.1.1.1 255.255.255.255

R1 (config-if) #no shut

R1 (config-if) #inter f0/0 Physical Address

R1 (config-if) #ip address 192.168.12.1 255.255.255.0

R1 (config-if) #no shut

R1 (config-if) #end

R1 (config) #router ISIS

R1 (config-router) #net 49.0001.0001.0001.0001.00 ISIS Net Address

R1 (Config-router) #ex

R1 (config) #inter f0/0 run ISIS protocol

R1 (config-if) #ip Router ISIS

R1 (config-if) #inter Loop 0

R1 (config-if) #ip Router ISIS

R1 (config-if) #end

R1#show ISIS neighbors view ISIS neighbor relationship found 2 optimizations

System ID Type Interface IP address state holdtime circuit ID

R2 L1 fa0/0 192.168.12.2 up 8 R2.01

R2 L2 fa0/0 192.168.12.2 up 8 R2.01

R1#conf T

R1 (config) #router ISIS

R1 (config-router) #is-type level-1 Change the type to 1

R1 (Config-router) #end

R1#show ISI Neighbors

System ID Type Interface IP address state holdtime circuit ID

R1#show ISI Neighbors

System ID Type Interface IP address state holdtime circuit ID found only one.

R2 L1 fa0/0 192.168.12.2 up 9 R2.01