Dell Force10 C150 Configuration Manual page 261

To set dampening parameters via a route map, use the following command in CONFIGURATION
ROUTE-MAP mode:
Command Syntax
set dampening
half-life reuse
suppress max-suppress-time
To view a count of dampened routes, history routes and penalized routes when route dampening is enabled,
look at the seventh line of the
Figure 10-32. Command example: show ip bgp summary
FTOS>show ip bgp summary
BGP router identifier 10.114.8.131, local AS number 65515
BGP table version is 855562, main routing table version 780266
122836 network entrie(s) and 221664 paths using 29697640 bytes of memory
34298 BGP path attribute entrie(s) using 1920688 bytes of memory
29577 BGP AS-PATH entrie(s) using 1384403 bytes of memory
184 BGP community entrie(s) using 7616 bytes of memory
Dampening enabled. 0 history paths, 0 dampened paths, 0 penalized paths
Neighbor
10.114.8.34
10.114.8.33
FTOS>
To view which routes are dampened (non-active), use the
EXEC Privilege mode.
Command Mode
CONFIG-ROUTE-MAP
show ip bgp
AS MsgRcvd MsgSent
18508 82883 79977
18508 117265 25069
Purpose
Enter the following optional parameters to
configure route dampening parameters:
•
half-life
which the Penalty is decreased. After the router
assigns a Penalty of 1024 to a route, the
Penalty is decreased by half after the half-life
period expires.
• reuse range: 1 to 20000. This number is
compared to the flapping route's Penalty value.
If the Penalty value is less than the reuse value,
the flapping route is once again advertised (or
no longer suppressed). (Default: 750)
•
suppress
compared to the flapping route's Penalty value.
If the Penalty value is greater than the suppress
value, the flapping route is no longer
advertised (that is, it is suppressed). (Default:
2000.)
•
max-suppress-time
maximum number of minutes a route can be
suppressed. The default is four times the
half-life value. (Default: 60 minutes.)
summary command output
TblVer InQ OutQ Up/Down
780266 0 2 00:38:51
780266 0 20 00:38:50
show ip bgp dampened-routes
range: 1 to 45. Number of minutes after
(
Default: 15 minutes)
range: 1 to 20000. This number is
range: 1 to 255. The
(Figure 10-32).
Dampening
Information
State/PfxRcd
118904
102759
command in
Border Gateway Protocol IPv4 (BGPv4) | 261