H3C Technologies H3C S10500 Series Switches - Manual (Page 142)

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Figure 48 Network diagram for OSPF FRR configuration
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
Configuration procedure
1. Configure IP addresses for the interfaces on each switch and configure OSPF.
Follow Figure 48 to configure the IP address and subnet mask of each interface on the switches. (Details
not shown)
Configure OSPF on the switches, ensuring that Switch S, Switch A, and Switch D can communicate with
each other at Layer 3. (Details not shown)
2. Configure OSPF FRR.
You can enable OSPF FRR to either automatically calculate a backup next hop, or to designate a backup
next hop by using a routing policy.
Method I: Enable OSPF FRR to automatically calculate the backup next hop.
# Configure Switch S.
<SwitchS> system-view
[SwitchS] bfd echo-source-ip 1.1.1.1
[SwitchS] ospf 1
[SwitchS-ospf-1] fast-reroute auto
[SwitchS-ospf-1] quit
# Configure Switch D.
<SwitchD> system-view
[SwitchD] bfd echo-source-ip 4.4.4.4
[SwitchD] ospf 1
[SwitchD-ospf-1] fast-reroute auto
[SwitchD-ospf-1] quit
Method II: Enable OSPF FRR to designate a backup next hop by using a routing policy.
# Configure Switch S.
<SwitchS> system-view
[SwitchS] bfd echo-source-ip 1.1.1.1
[SwitchS] ip ip-prefix abc index 10 permit 4.4.4.4 32
[SwitchS] route-policy frr permit node 10
[SwitchS-route-policy] if-match ip-prefix abc
[SwitchS-route-policy] apply fast-reroute backup-interface vlan-interface 100
backup-nexthop 12.12.12.2
[SwitchS-route-policy] quit
[SwitchS] ospf 1
[SwitchS-ospf-1] fast-reroute route-policy frr
[SwitchS-ospf-1] quit