Dis Selection Configuration - 3Com MSR 50 Series Configuration Manual

910 C 57: IS-IS C
HAPTER ONFIGURATION
DIS Selection
Configuration
192.168.0.0/24
10.1.1.0/24
10.1.2.0/24
172.16.0.0/16
Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set
Network requirements
As shown in Figure 267, on a broadcast network (Ethernet), Router A, Router B,
Router C and Router D reside in IS-IS area 10. Router A and Router B are Level-1-2
routers, Router C is a Level-1 router, and Router D is a Level-2 router.
Change the DIS priority of Router A to make it selected as the Level-1-2 DIS router.
Network diagram
Figure 267 Network diagram for DIS selection configuration
Router A
L1/L2
Eth1/0
10 .1.1.1/24
Eth1/0
10.1.1.3/24
Router C
L1
Configuration procedure
1 Configure an IP address for each interface (omitted)
2 Enable IS-IS
# Configure Router A.
<RouterA> system-view
[RouterA] isis 1
[RouterA-isis-1] network-entity 10.0000.0000.0001.00
[RouterA-isis-1] quit
[RouterA] interface ethernet 1/0
[RouterA-Ethernet1/0] isis enable 1
[RouterA-Ethernet1/0] quit
# Configure Router B.
<RouterB> system-view
[RouterB] isis 1
[RouterB-isis-1] network-entity 10.0000.0000.0002.00
[RouterB-isis-1] quit
10 NULL S2/0
20 NULL S2/0
20 NULL S2/0
10 NULL Eth1/0
Router B
L1/L2
Eth1/0
10.1.1.2/24
Eth1/0
10 .1.1.4/24
Router D
L2
Direct R/L/-
192.168.0.1 R/-/-
192.168.0.1 R/-/-
Direct R/L/-