Dis Election Configuration Example - HP 6125XLG Layer 3 - Ip Routing Configuration Manual

10.1.1.0/24
10.1.2.0/24
172.16.0.0/16
Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set
[SwitchD] display isis route
IPv4 Destination
-------------------------------------------------------------------------------
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 Rib, L-Advertised in LSPs, U-Up/Down Bit Set
The output shows that the routing table of Level- 1 switches contains a default route with the next hop as
the Level- 1 -2 switch. The routing table of Level-2 switch contains both routing information of Level- 1 and
Level-2.

DIS election configuration example

Network requirements
As shown in
Switch A and Switch B are Level- 1 -2 switches, Switch C is a Level- 1 switch, and Switch D is a Level-2 switch.
Change the DIS priority of Switch A to make it elected as the Level- 1 -2 DIS router.
Figure 41 Network diagram
10
10
20
Route information for IS-IS(1)
------------------------------
Level-2 IPv4 Forwarding Table
-----------------------------
IntCost
10
20
20
10
Figure 41, Switches A, B, C, and D reside in IS-IS area 10 on a broadcast network (Ethernet).
NULL Vlan100
NULL Vlan200
NULL Vlan300
ExtCost ExitInterface
NULL Vlan300
NULL Vlan300
NULL Vlan300
NULL Vlan100
160
Direct D/L/-
Direct D/L/-
192.168.0.2 R/-/-
NextHop Flags
Direct D/L/-
192.168.0.1 R/-/-
192.168.0.1 R/-/-
Direct D/L/-