Accton Technology ES4626 - Manual (Page 533)

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Usage Guide: Abundant route update due to unstable route could be reduced with route
dampening technology, of which the algorithm is lay penalty on the route when the route
fluctuates, and when penalty exceeds the restrain border this route will no longer be
advertised. The penalty value will be reduced by time by the half-life index regulation if
the route keeps stable and finally be advertised again when the penalty falls below the
border or the restrain time exceeds the maximum restrain time. This command is for
enabling/disabling the route dampening and configuring its parameters
Example: Switch(config-router)# bgp dampening
13.8.3.16 bgp default
Command: bgp default {ipv4-unicast|local-preference <0-4294967295>}
no bgp default {ipv4-unicast|local-preference [<0-4294967295>]}
Function: Set the BGP defaults, the “no bgp default {ipv4-unicast|local-preference
[<0-4294967295>]} ” command cancels this configuration
Parameter:<0-4294967295> : Default local priority
Default:
The IPv4 unicast is default enabled when BGP is enabled. The default priority
is 100.
Command Mode: BGP route mode .
Usage Guide: IPv4 unicast address-family is default enabled in BGP. Cancel this setting
with no bgp default ipv4-unicast command so to not enable this address-family in default.
Default local priority can be configured through bgp default local-preference command.
Example:
Configure on 10.1.1.66
Switch(config)#router bgp 200
Switch(config-router)# bgp default local-preference 500
13.8.3.17 bgp deterministic-med
Command: bgp deterministic-med
no bgp deterministic-med
Function:
Use the best MED for the same prefix in the AS to compare with other AS.
The “no bgp deterministic-med” cancels this configuration
Parameter: None
Default: Not configured
Command Mode: BGP route mode.
Usage Guide: Normally if same prefix routes from several paths, each path will be
compared. With this configuration, the system will only use the path with the smallest
MED in the AS (when other main attributes equal) to compare with other AS. After the
best one is elected, select the path among AS with no regard to MED value.