R3102-R3103-HP 6600/HSR6600 Routers Layer 3 - IP Routing Configuration Guide

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GR requires the cooperation of neighboring devices to recover routing information during the
active/standby switchover period. NSR does not require that, and is more popular in practice.
IMPORTANT:
Do not configure OSPF NSR on a device acting as GR Restarter.
To enable OSPF NSR:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable OSPF NSR.
ospf non-stop-routing By default, OSPF NSR is disabled.
Configuring BFD for OSPF
Bidirectional forwarding detection (BFD) provides a single mechanism to quickly detect and monitor the
connectivity of links between OSPF neighbors, reducing network convergence time. For more information
about BFD, see High Availability Configuration Guide.
OSPF supports the following BFD detection methods:
• Control packet bidirectional detection, which requires BFD configuration to be made on both OSPF
routers on the link.
• Echo packet single-hop detection, which requires BFD configuration to be made on one OSPF router
on the link.
Configuring control packet bidirectional detection
Both ends of a BFD session must be on the same network segment and in the same area. One network
segment can only belong to one area.
To enable BFD control packet bidirectional detection on an OSPF interface:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable an OSPF process and enter OSPF
view.
ospf [ process-id | router-id router-id |
vpn-instance vpn-instance-name ] *
N/A
3. Specify a network to enable the interface
attached to the network to run the OSPF
process in the area.
network ip-address wildcard-mask N/A
4. Exit to system view.
quit N/A
5. Enter interface view.
interface interface-type
interface-number
N/A
6. Enable BFD control packet bidirectional
detection on the interface.
ospf bfd enable
Not enabled by
default.