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Implementing BGP on Cisco IOS XR Software
How to Implement BGP on Cisco IOS XR Software
RC-54
Cisco IOS XR Routing Configuration Guide
OL-14356-01
Configuring BGP Weights
Perform this task to assign a weight to routes received from a neighbor. A weight is a number that you
can assign to a path so that you can control the best-path selection process. If you have particular
neighbors that you want to prefer for most of your traffic, you can use the weight command to assign a
higher weight to all routes learned from that neighbor.
Restrictions
The clear bgp command must be used for the newly configured weight to take effect.
SUMMARY STEPS
1. configure
2. router bgp as-number
3. neighbor ip-address
4. remote-as as-number
5. address-family {ipv4 unicast | ipv4 multicast | ipv4 labeled-unicast | ipv4 tunnel | ipv4 mdt |
ipv6 unicast | ipv6 multicast | ipv6 labeled-unicast | vpnv4 unicast | vpnv6 unicast}
6. weight weight-value
Step 3
default-metric value
Example:
RP/0/RP0/CPU0:router(config-bgp)# default
metric 10
Sets the default metric, which is used to set the MED to
advertise to peers for routes that do not already have a
metric set (routes that were received with no MED
attribute).
Step 4
end
or
commit
Example:
RP/0/RP0/CPU0:router(config-bgp)# end
or
RP/0/RP0/CPU0:router(config-bgp)# commit
Saves configuration changes.
• When you issue the end command, the system prompts
you to commit changes:
Uncommitted changes found, commit them before
exiting(yes/no/cancel)?
[cancel]:
–
Entering yes saves configuration changes to the
running configuration file, exits the configuration
session, and returns the router to EXEC mode.
–
Entering no exits the configuration session and
returns the router to EXEC mode without
committing the configuration changes.
–
Entering cancel leaves the router in the current
configuration session without exiting or
committing the configuration changes.
• Use the commit command to save the configuration
changes to the running configuration file and remain
within the configuration session.
Command or Action Purpose