Ospf Nsr Configuration Example - HP 6125XLG Layer 3 - Ip Routing Configuration Manual

OSPF 100 deleted GR Interval timer.
*Oct 21 15:29:30:912 2011 SwitchA OSPF/7/DEBUG:
OSPF 100 deleted GR wait timer.
%Oct 21 15:29:30:920 2011 SwitchA OSPF/5/OSPF_NBR_CHG: OSPF 100 Neighbor
192.1.1.2(Vlan-interface100) from Full to Down.
%Oct 21 15:29:30:921 2011 SwitchA OSPF/5/OSPF_NBR_CHG: OSPF 100 Neighbor
192.1.1.3(Vlan-interface100) from Full to Down.
%Oct 21 15:29:33:815 2011 SwitchA OSPF/5/OSPF_NBR_CHG: OSPF 100 Neighbor
192.1.1.3(Vlan-interface100) from Loading to Full.
%Oct 21 15:29:35:578 2011 SwitchA OSPF/5/OSPF_NBR_CHG: OSPF 100 Neighbor
192.1.1.2(Vlan-interface100) from Loading to Full.
The output shows that Switch A completes GR.

OSPF NSR configuration example

Network requirements
As shown in
Enable OSPF NSR on Switch S to ensure correct routing when an active/standby switchover occurs on
Switch S.
Figure 30 Network diagram
Loop 0
22.22.22.22/32
Switch A
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 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 100
[SwitchS-ospf-100] non-stop-routing
[SwitchS-ospf-100] quit
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 verify the
neighbor relationship between Switch A and Switch S and between Switch B and Switch S; use the
display ospf routing command to verify 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] placement reoptimize
Predicted changes to the placement
Program
Figure 30, Switch S, Switch A, and Switch B belong to the same OSPF routing domain.
Vlan-int100
12.12.12.1/24
Vlan-int100
12.12.12.2/24
Switch S
Vlan-int200
14.14.14.1/24
Vlan-int200
14.14.14.2/24
Current location
117
Loop 0
44.44.44.44/32
Switch B
New location