DGS-6604
bgp always-compare-med
CLI Reference Guide
67
bgp always-compare-med
Use this command to compare the Multi-Exit Discriminator (MED) for paths from
neighbors in different autonomous systems. Use the
no
bgp always-compare-
med
command to disallow the comparison.
bgp always-compare-med
no bgp always-compare-med
Syntax
None
Default
Disabled
Command Mode
Router configuration
Usage Guideline
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 is 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 comparisons between all paths, regardless of the autonomous
system from which the paths are received.
The
bgp deterministic-med command on page 75
can be configured to
enforce a deterministic comparison of the MED value between all paths received
from within the same autonomous system.
Example
This example shows how to configure the comparison of the MED from
alternative paths, regardless of the autonomous system from which the paths are
received:
Switch(config)# router bgp 65534
Switch(config-router)# bgp always-compare-med
Summary of Contents for DGS-6600 Series
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