Command Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches Chapter 5 BGP Configuration Commands
5-10
half-life-unreachable: Specifies a half-life for suppressed routes from 1 to 45 minutes.
By default, the value is 15 minutes.
reuse: Specifies a reuse threshold value for suppressed routes from 1 to 20000. A
suppressed route whose penalty value decreases under the value is reused. By default,
the reuse value is 750.
suppress: Specifies a suppression threshold from 1 to 20000. The route with a penalty
value higher than the threshold is suppressed. The default value is 2000.
ceiling: Specifies a ceiling penalty value from 1001 to 20000. The value must be bigger
than the suppress value. By default, the value is 16000.
route-policy-name: Routing policy name, a string of 1 to 19 characters.
half-life-reachable, half-life-unreachable, reuse, suppress and ceiling are mutually
dependent. Once any one is configured, all the others should also be specified
accordingly.
Description
Use the dampening command to enable BGP route dampening and/or configure
dampening parameters.
Use the undo dampening command to disable route dampening.
By default, no route dampening is configured.
The command dampens only EBGP routes rather than IBGP routes.
Related commands: reset bgp dampening, reset bgp flap-info, display bgp
routing-table dampened, display bgp routing-table dampening parameter and
display bgp routing-table flap-info.
Examples
# In BGP view, configure BGP route dampening.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] dampening 15 15 1000 2000 10000
5.1.12 default ipv4-unicast
Syntax
default ipv4-unicast
undo default ipv4-unicast
View
BGP view
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