H3C Technologies H3C S12500-X Series Switches - Manual (Page 185)

171
BkLabel: NULL BkNextHop: N/A
Tunnel ID: Invalid Interface: Vlan-interface11
BkTunnel ID: Invalid BkInterface: N/A
The output shows that Switch A and Switch B communicate through VLAN-interface 11.
297B
IS-IS FRR configuration example
572B
Network requirements
As shown in
1051H
Figure 45 , Switch S, Switch A, and Switch D belong to the same IS-IS routing domain.
Configure IS-IS FRR so that when the Link A fails, traffic can be switched to Link B immediately.
Figure 45 Network diagram
573B
Configuration procedure
1. Configure IP addresses and subnet masks for interfaces on the switches. (Details not shown.)
2. Configure IS-IS on the switches to make sure Switch A, Switch D, and Switch S can communicate
with each other at Layer 3. (Details not shown.)
3. Configure IS-IS FRR:
Enable IS-IS FRR to automatically calculate a backup next hop, or designate a backup next hop by
using a referenced routing policy.
{
(Method 1.) Enable IS-IS FRR to automatically calculate a backup next hop:
# Configure Switch S.
system-view
[SwitchS] bfd echo-source-ip 1.1.1.1
[SwitchS] isis 1
[SwitchS-isis-1] fast-reroute auto
[SwitchS-isis-1] quit
# Configure Switch D.
system-view
[SwitchD] bfd echo-source-ip 4.4.4.4
[SwitchD] isis 1
[SwitchD-isis-1] fast-reroute auto
[SwitchD-isis-1] quit
{
(Method 2.) Enable IS-IS FRR to designate a backup next hop by using a referenced routing
policy:
# Configure Switch S.
system-view
[SwitchS] bfd echo-source-ip 1.1.1.1
Switch S Switch D
Switch A
Loop 0
1.1.1.1/32
Vla
n-i
nt1
00
12
.12
.12
.1/
24
Vlan-int200
13.13.13.1/24 Vlan-int200
13.13.13.2/24
Vla
n-i
nt1
00
12
.12
.12
.2/
24
Vla
n-in
t10
1
24.2
4.2
4.2
/24
Vla
n-in
t10
1
24.2
4.2
4.4
/24
Loop 0
4.4.4.4/32
Link A
Link B