D-Link DXS-3600-16S Manual page 76

Command Default Level
Usage Guideline
Example
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#router bgp 65534
DXS-3600-32S(config-router)#bgp aggregate-next-hop-check
DXS-3600-32S(config-router)#
7-6 bgp always-compare-med
This command is used to enable the comparison of the Multi Exit Discriminator (MED) for paths from neighbors in
different autonomous systems. Use the no form of this command to disallow the comparison.
bgp always-compare-med
no bgp always-compare-med
Parameters
Default
Command Mode
Command Default Level
Usage Guideline
Example
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#router bgp 65534
DXS-3600-32S(config-router)#bgp always-compare-med
DXS-3600-32S(config-router)#
DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
Level: 8. (EI Mode Only Command)
This command is used to enable the checking of next hop of the BGP aggregated
routes. Only the routes with the same next hop attribute can be aggregated if the
BGP aggregate next hop check is enabled. Using the no form of this command is to
disable the bgp aggregate-next-hop-check.
You can verify your settings by entering the show ip bgp parameters command.
This example shows how to configure the BGP aggregate-next-hop-checking state.
None.
The default option is disabled.
Router Configuration.
Level: 8. (EI Mode Only Command)
The MED, as stated in RFC 1771, is an optional non-transitive attribute that is a four
octet non-negative integer. The value of this attribute may be used by the BGP best
path selection process to discriminate among multiple exit points to a neighboring
autonomous system.
The MED is one of the parameters that are considered when selecting the best path
among many alternative paths. The path with a lower MED is preferred over a path
with a higher MED. During the best-path selection process, MED comparison is done
only among paths from the same autonomous system. The bgp always-compare-
med command is used to change this behavior by enforcing MED comparison
between all paths, regardless of the autonomous system from which the paths are
received.
The bgp deterministic-med command can be configured to enforce deterministic
comparison of the MED value between all paths received from within the same
autonomous system.
You can verify your settings by entering show ip bgp parameters command.
This example shows how to configure the switch to compare the MED from
alternative paths, regardless of the autonomous system from which the paths are
received.
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