Configuring RIP NSR
Network requirements
As shown in Figure 12, Switch A, Switch B, and Switch S all run RIPv2.
Enable RIP NSR on Switch S to ensure correct routing when an active/standby switchover occurs on Switch S.
Figure 12: Network diagram
Configuration procedure
Configure IP addresses and subnet masks for interfaces on the switches. (Details not shown.)
Configure RIPv2 on the switches to ensure the following: (Details not shown.)
Switch A, Switch B, and Switch S can communicate with each other at Layer 3.
Dynamic route update can be implemented among them with RIPv2.
Enable RIP NSR on Switch S.
<SwitchS> system-view [SwitchS] rip 100 [SwitchS-rip-100] non-stop-routing [SwitchS-rip-100] quit
Verifying the configuration
# Perform an active/standby switchover on Switch S.
[SwitchS] placement reoptimize Predicted changes to the placement Program Current location New location --------------------------------------------------------------------- lb 0/0 0/0 lsm 0/0 0/0 slsp 0/0 0/0 rib6 0/0 0/0 routepolicy 0/0 0/0 rib 0/0 0/0 staticroute6 0/0 0/0 staticroute 0/0 0/0 eviisis 0/0 0/0 ospf 0/0 1/0 Continue? [y/n]:y Re-optimization of the placement start. You will be notified on completion Re-optimization of the placement complete. Use 'display placement' to view the new placement
# Display neighbor information and route information on Switch A.
[SwitchA] display rip 1 neighbor
Neighbor Address: 12.12.12.2
Interface : Vlan-interface200
Version : RIPv2 Last update: 00h00m13s
Relay nbr : No BFD session: None
Bad packets: 0 Bad routes : 0
[SwitchA] display rip 1 route
Route Flags: R - RIP, T - TRIP
P - Permanent, A - Aging, S - Suppressed, G - Garbage-collect
D - Direct, O - Optimal, F - Flush to RIB
----------------------------------------------------------------------------
Peer 12.12.12.2 on Vlan-interface200
Destination/Mask Nexthop Cost Tag Flags Sec
14.0.0.0/8 12.12.12.2 1 0 RAOF 16
44.0.0.0/8 12.12.12.2 2 0 RAOF 16
Local route
Destination/Mask Nexthop Cost Tag Flags Sec
12.12.12.0/24 0.0.0.0 0 0 RDOF -
22.22.22.22/32 0.0.0.0 0 0 RDOF -
# Display neighbor information and route information on Switch B.
[SwitchB] display rip 1 neighbor
Neighbor Address: 14.14.14.2
Interface : Vlan-interface200
Version : RIPv2 Last update: 00h00m32s
Relay nbr : No BFD session: None
Bad packets: 0 Bad routes : 0
[SwitchB] display rip 1 route
Route Flags: R - RIP, T - TRIP
P - Permanent, A - Aging, S - Suppressed, G - Garbage-collect
D - Direct, O - Optimal, F - Flush to RIB
----------------------------------------------------------------------------
Peer 14.14.14.2 on Vlan-interface200
Destination/Mask Nexthop Cost Tag Flags Sec
12.0.0.0/8 14.14.14.2 1 0 RAOF 1
22.0.0.0/8 14.14.14.2 2 0 RAOF 1
Local route
Destination/Mask Nexthop Cost Tag Flags Sec
44.44.44.44/32 0.0.0.0 0 0 RDOF -
14.14.14.0/24 0.0.0.0 0 0 RDOF -
The output shows that the neighbor and route information on Switch A and Switch B keep unchanged during the active/standby switchover on Switch S. The traffic from Switch A to Switch B has not been impacted.