Configuring Bfd For Ospf; Establishing The Configuration Task - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing

4.9 Configuring BFD for OSPF

After BFD for OSPF is enabled, when a link fails, the switch rapidly detects the failure, notifies
the OSPF process or interface of the fault, and instructs OSPF to recalculate routes. This speeds
up OSPF network convergence.

4.9.1 Establishing the Configuration Task

Before configuring BFD for OSPF, familiarize yourself with the applicable environment,
complete the pre-configuration tasks, and obtain the data required for the configuration. This
will help you complete the configuration task quickly and efficiently.
Applicable Environment
OSPF enables the switch to periodically send Hello packets to a neighboring switch for fault
detection. Detecting a fault takes more than 1s. As technologies develop, voice, video, and other
VOD services are widely used. These services are quite sensitive to packet loss and delays. When
traffic is transmitted at gigabit rates, long-time fault detection will cause packet loss. This cannot
meet high reliability requirements of the carrier-class network.
BFD for OSPF is introduced to resolve this problem. After BFD for OSPF is configured in a
specified process or on a specified interface, the link status can be rapidly detected and fault
detection can be completed in milliseconds. This speeds up OSPF convergence when the link
status changes.
Pre-configuration Tasks
Before configuring BFD for OSPF, complete the following task:
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l
Data Preparation
To configure BFD for OSPF, you need the following data.
No.
1
2
3
Issue 01 (2012-03-15)
Configuring IP addresses for interfaces to ensure that neighboring switches are reachable
at the network layer
Configuring Basic OSPF Functions
Data
Number of the OSPF process to be enabled with BFD for OSPF
Type and number of the interface to be enabled with BFD for OSPF
(Optional) Values of BFD session parameters
NOTE
The default parameter values are recommended.
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