Step 3
Run:
peer
{
group-name
|
ipv6-address
}
tracking
[
delay
delay-time
]
BGP4+ tracking is enabled for the specified peer.
By default, BGP4+ tracking is disabled.
A proper value of
delay-time
can ensure network stability when a peer is detected unreachable.
l
If
delay-time
is set to 0, BGP immediately tears down the connection between the local device
and its peer after the peer is detected unreachable.
l
If IGP route flapping occurs and
delay-time
for an IBGP peer is set to 0, the peer relationship
between the local device and the peer alternates between Up and Down. Therefore,
delay-
time
for an IBGP peer should be set to a value greater than the actual IGP route convergence
time.
l
When BGP neighbors successfully perform the GR negotiation, the active/standby
switchover occurs on the BGP neighbors, to prevent the failure of GR,
delay-time
should be
set to a value greater than GR period. If
delay-time
is set to be smaller than the GR period,
the connection between the local device and the BGP peer will be torn down, which leads to
the failure of GR.
----End
8.7.3 Checking the Configuration
After BGP4+ tracking is configured, you can check the configuration of BGP4+ tracking by
viewing detailed information about the BGP peer or peer group.
Prerequisite
All BGP4+ tracking configurations are complete.
Checking the Configuration
Run the following commands to check the previous configuration.
l
Run the
display bgp
ipv6 peer
[ [
ipv6-address
]
verbose
] command to check information
about the BGP4+ peer.
l
Run the
display bgp
ipv6 group
[
group-name
] command to check information about the
BGP4+ peer group.
8.8 Configuring BGP4+ Route Dampening
By configuring BGP4+ route dampening, you can suppress unstable BGP4+ routes.
8.8.1 Establishing the Configuration Task
Before configuring BGP4+ route dampening, familiarize yourself with the applicable
environment, complete the pre-configuration tasks, and obtain the required data. This can help
you complete the configuration task quickly and accurately.
S6700 Series Ethernet Switches
Configuration Guide - IP Routing
8 BGP4+ Configuration
Issue 01 (2012-03-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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