Data Preparation
To configure the BGP next hop delayed response, you need the following data.
No. Data
1 Delay in responding to changes of the next hop
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
bgp as-number
The BGP view is displayed.
Step 3 Run:
nexthop recursive-lookup delay [ delay-time ]
A delay in responding to a next hop change is set.
The default delay time is 5 seconds.
NOTE
BGP route convergence depends on IGP route convergence. If IGP route convergence is quick, the default
delay time does not need to be changed. If IGP route convergence is slow, setting a delay time longer than
IGP route convergence time is recommended.
----End
Checking the Configuration
After configuring the BGP next hop delayed response, you can run the following command to
check the previous configuration.
l Run the display current-configuration configuration bgp | include nexthop recursive-
lookup delay command to view information about the delay in responding to a next hop
change.
7.17 Configuring BFD for BGP
BFD for BGP speeds up fault detection and therefore increases the route convergence speed.
Applicable Environment
As technologies develop, voice and video services are widely applied. These services are quite
sensitive to the packet loss and delay.BGP periodically sends Keepalive packets to its peers to
detect the status of its peers. The detection mechanism, however, takes more than one second.
When the data transmission rate reaches the level of Gbit/s, such slow detection will cause a
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 7 BGP Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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