3Com MSR 50 Series Configuration Manual page 907

Configuration procedure
1 Configure IP addresses for interfaces (omitted)
2 Configure IS-IS
# Configure Router A
<RouterA> system-view
[RouterA] isis 1
[RouterA-isis-1] is-level level-1
[RouterA-isis-1] network-entity 10.0000.0000.0001.00
[RouterA-isis-1] quit
[RouterA] interface serial 2/0
[RouterA-Serial2/0] isis enable 1
[RouterA-Serial2/0] quit
# Configure Router B
<RouterB> system-view
[RouterB] isis 1
[RouterB-isis-1] is-level level-1
[RouterB-isis-1] network-entity 10.0000.0000.0002.00
[RouterB-isis-1] quit
[RouterB] interface serial 2/0
[RouterB-Serial2/0] isis enable 1
[RouterB-Serial2/0] quit
# Configure Router C.
<RouterC> system-view
[RouterC] isis 1
[RouterC-isis-1] network-entity 10.0000.0000.0003.00
[RouterC-isis-1] quit
[RouterC] interface serial 2/0
[RouterC-Serial2/0] isis enable 1
[RouterC-Serial2/0] quit
[RouterC] interface serial 2/1
[RouterC-Serial2/1] isis enable 1
[RouterC-Serial2/1] quit
[RouterC] interface serial 2/2
[RouterC-Serial2/2] isis enable 1
[RouterC-Serial2/2] quit
# Configure Router D
<RouterD> system-view
[RouterD] isis 1
[RouterD-isis-1] is-level level-2
[RouterD-isis-1] network-entity 20.0000.0000.0004.00
[RouterD-isis-1] quit
[RouterD] interface ethernet 1/0
[RouterD-Ethernet1/0] isis enable 1
[RouterD-Ethernet1/0] quit
[RouterD] interface serial 2/0
[RouterD-Serial2/0] ip address 192.168.0.2 255.255.255.0
[RouterD-Serial2/0] isis enable 1
[RouterD-Serial2/0] quit
IS-IS Configuration Example 907