H3C Technologies H3C S12500 Series Switches - Manual (Page 137)

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OSPF 100: Start Flush Stale ASE + NSSA LSAs
OSPF 100: End Flush Stale ASE + NSSA LSAs
Switch A completes GR with the help of Switch B.
OSPF NSR configuration example
Network requirements
As shown in Figure 48 , Switch S, Switch A, and Switch B belong to the same OSPF routing domain.
Enable OSPF NSR on Switch S to ensure correct routing when an active/standby switchover occurs on
Switch S.
Figure 48 Network diagram
Configuration procedure
1. Configure IP addresses and subnet masks for interfaces on the switches. (Details not shown.)
2. Configure OSPF on the switches to make sure that Switch S, Switch A, and Switch B can
communicate with each other at Layer 3 and dynamic route update can be implemented among
them with OSPF. (Details not shown.)
3. Enable OSPF NSR on Switch S.
<SwitchS> system-view
[SwitchS] ospf non-stop-routing
4. Verify the configuration:
After Switch S establishes neighbor relationships with Switch A and Switch B, they start to
exchange routing information. After network convergence, perform an active/standby switchover
on Switch S. During the switchover period, use the display ospf peer command to check the
neighbor relationship between Switch A and Switch S and between Switch B and Switch S; use the
display ospf routing command to check if there are routes from Switch A to the loopback interface
on Switch B and from Switch B to the loopback interface on Switch A.
# Perform an active/standby switchover on Switch S.
[SwitchS] slave switchover enable
[SwitchS] slave switchover
Caution!!! Confirm to switch slave to master? [Y/N]:y
# Display OSPF neighbors and routes on Switch A.
<SwitchA> display ospf peer
OSPF Process 1 with Router ID 192.168.1.40
Neighbor Brief Information
Area: 0.0.0.0
Router ID Address Pri Dead-Time Interface State
192.168.1.41 12.12.12.2 1 40 Vlan100 Full/BDR
<SwitchA> display ospf routing