H3C Technologies H3C S5560 Series Switches - Manual (Page 144)

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Figure 32 Network diagram
Table 10 Interface and IP address assignment
Device Interface IP address
Switch A Vlan-int100 12.12.12.1/24
Switch A Vlan-int200 13.13.13.1/24
Switch A Loop0 1.1.1.1/32
Switch B Vlan-int101 24.24.24.4/24
Switch B Vlan-int200 13.13.13.2/24
Switch B Loop0 4.4.4.4/32
Switch C Vlan-int100 12.12.12.2/24
Switch C Vlan-int101 24.24.24.2/24
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.
<SwitchA> system-view
[SwitchA] bfd echo-source-ip 2.2.2.2
[SwitchA] ospf 1
[SwitchA-ospf-1] fast-reroute lfa
[SwitchA-ospf-1] quit
# Configure Switch B.
<SwitchB> system-view
[SwitchB] bfd echo-source-ip 3.3.3.3
[SwitchB] ospf 1
[SwitchB-ospf-1] fast-reroute lfa
[SwitchB-ospf-1] quit
{
(Method 2.) Enable OSPF FRR to designate a backup next hop by using a routing policy.
# Configure Switch A.
Switch A Switch B
Switch C
Loop0
Vla
n-i
nt1
00
Vlan-int200 Vlan-int200
Vla
n-i
nt1
00
Vla
n-in
t10
1
Vla
n-in
t10
1
Loop0
Link A
Link B