R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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OSPF 100 deleted GR wait timer.
OSPF 100 deleted GR Interval timer.
OSPF 100 GR Completed for OSPF Router
OSPF 100 notified RM that OSPF process left GR.
RM notified that all protocol left GR.
OSPF 100 started flushing STALE LSA after all protocol left GR.
OSPF 100: Flush Stale Area LSAs
OSPF 100: Start Flush Stale ASE + NSSA LSAs
OSPF 100: End Flush Stale ASE + NSSA LSAs
Router A completes GR with the help of Router B.
Configuring OSPF NSR
Network requirements
As shown in Figure 30, Router S, Router A, and Router B belong to the same OSPF routing domain.
Enable OSPF NSR on Router S to ensure correct routing when an active/standby switchover occurs on
Router S. Router S is an HSR6802, HSR6804, or HSR6808 router.
Figure 30 Network diagram
Configuration procedure
1. Configure IP addresses for the interfaces on each router and configure OSPF:
Follow Figure 30 to c
onfigure the IP address and subnet mask of each interface on the routers.
(Details not shown.)
Configure OSPF on the routers, ensuring that Router S, Router A, and Router B can communicate
with each other at Layer 3 and dynamic route update can be implemented among them with OSPF.
(Details not shown.)
2. Configure OSPF NSR:
# Enable OSPF NSR on Router S.
<RouterS> system-view
[RouterS] ospf non-stop-routing
3. Verify the configuration:
After Router S establishes neighbor relationships with Router A and Router B, they start to
exchange routing information. After network convergence, perform an active/standby switchover
on Router S. During the switchover period, use the display ospf peer command to check the
neighbor relationships between Router A and Router S and between Router B and Router S; use the
display ospf routing command to check if there are routes from Router A to the loopback interface
on Router B and from Router B to the loopback interface on Router A.
# Perform an active/standby switchover on Router S.
[RouterS] slave switchover enable
[RouterS] slave switchover
Caution!!! Confirm to switch slave to master? [Y/N]:y