Ospf Frr Configuration Example - HP FlexFabric 12900E Series Configuration Manual

Flags: 0x1008c
Label: NULL
BkLabel: NULL
Tunnel ID: Invalid
BkTunnel ID: Invalid
FtnIndex: 0x0
Connector: N/A
The output shows that Switch A communicates with Switch B through VLAN-interface 11.

OSPF FRR configuration example

Network requirements
As shown in
Configure OSPF FRR so that when the link between Switch A and Switch B fails, traffic is
immediately switched to Link B.
Figure 34 Network diagram
Loop0
Switch A
Table 10 Interface and IP address assignment
Device
Switch A
Switch A
Switch A
Switch B
Switch B
Switch B
Switch C
Switch C
Configuration procedure
1. Configure IP addresses and subnet masks for interfaces on the switches. (Details not shown.)
2. Configure OSPF on the switches to ensure that Switch A, Switch B, and Switch C can
communicate with each other at the network layer. (Details not shown.)
3. Configure OSPF FRR to automatically calculate the backup next hop:
You can enable OSPF FRR to either calculate a backup next hop by using the LFA algorithm, or
specify a backup next hop by using a routing policy.
(Method 1.) Enable OSPF FRR to calculate the backup next hop by using the LFA algorithm:

# Configure Switch A.
OrigNextHop: 10.1.1.100
RealNextHop: 10.1.1.100
BkNextHop: N/A
Interface: Vlan-interface11
BkInterface: N/A
TrafficIndex: N/A
Figure 34, Switch A, Switch B, and Switch C reside in the same OSPF domain.
Switch C
Vlan-int200
Interface
Vlan-int100
Vlan-int200
Loop0
Vlan-int101
Vlan-int200
Loop0
Vlan-int100
Vlan-int101
Link B
Link A
Vlan-int200
129
Loop0
Switch B
IP address
12.12.12.1/24
13.13.13.1/24
1.1.1.1/32
24.24.24.4/24
13.13.13.2/24
4.4.4.4/32
12.12.12.2/24
24.24.24.2/24