Specifications

Implementing BGP on Cisco IOS XR Software
How to Implement BGP on Cisco IOS XR Software
RC-107
Cisco IOS XR Routing Configuration Guide
BGP Load Balancing
Perform this task to enable BGP multipath load sharing for external BGP (EBGP), interior BGP (IBGP),
and EIBGP and to enable BGP to carry link bandwidth attribute of the DMZ link.
When the PE router includes the link bandwidth extended community in its updates to the remote PE
through the Multiprotocol Interior BGP (MP-IBGP) session (either IPv4 or VPNv4), the remote PE
automatically does load balancing if the maximum-paths command is enabled.
SUMMARY STEPS
1. configure
2. router bgp as-number
3. vrf vrf-name
4. address-family {ipv4 | ipv6} unicast
5. maximum-paths {ebgp | ibgp | eibgp} maximum [unequal-cost]
6. exit
7. neighbor ip-address
8. dmz-link-bandwidth
Step 19
route-policy route-policy-name out
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr-af)#
route-policy pe_ce_out_policy out
Specifies a routing policy for an outbound route. The policy
can be used to filter routes or modify route attributes.
Step 20
end
or
commit
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr-af)# en
d
or
RP/0/RP0/CPU0:router(config-bgp-vrf-nbr-af)#
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