Cisco Cisco IOS Software Release 12.2(14)S
BGP Link Bandwidth
How to Configure BGP Link Bandwidth
4
Cisco IOS Release 12.2(2)T, 12.2(14)S, 12.2(11)T, and 12.0(24)S
DETAILED STEPS
Command or Action
Purpose
Step 1
enable
Example:
Router> enable
Enables higher privilege levels, such as privileged EXEC
mode.
mode.
•
Enter your password if prompted.
Step 2
configure {terminal | memory | network}
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
router bgp as-number
Example:
Router(config)# router bgp 50000
Enters router configuration mode to create or configure a
BGP routing process.
BGP routing process.
Step 4
address-family ipv4 [mdt | multicast | tunnel |
unicast [vrf vrf-name] | vrf vrf-name] | ipv6
[multicast | unicast] | vpnv4 [unicast]
Example:
Router(config-router)# address-family ipv4
Places the router in address family configuration mode.
•
The BGP Link Bandwidth feature is supported only
under the IPv4 and VPNv4 address families.
under the IPv4 and VPNv4 address families.
Step 5
bgp dmzlink-bw
Example:
Router(config-router-af)# bgp dmzlink-bw
Configures BGP to distribute traffic proportionally to the
bandwidth of the link.
bandwidth of the link.
•
This command must be entered on each router that
contains an external interface that is to be used for
multipath load balancing.
contains an external interface that is to be used for
multipath load balancing.
Step 6
neighbor ip-address dmzlink-bw
Example:
Router(config-router-af)# neighbor 172.16.1.1
dmzlink-bw
Configures BGP to include the link bandwidth attribute for
routes learned from the external interface specified IP address.
routes learned from the external interface specified IP address.
•
This command must be configured for each eBGP link
that is to be configured as a multipath. Enabling this
command allows the bandwidth of the external link to
be propagated through the link bandwidth extended
community.
that is to be configured as a multipath. Enabling this
command allows the bandwidth of the external link to
be propagated through the link bandwidth extended
community.
Step 7
neighbor ip-address send-community [both |
extended | standard]
Example:
Router(config-router-af)# neighbor 10.10.10.1
send-community extended
(Optional) Enables community and/or extended community
exchange with the specified neighbor.
exchange with the specified neighbor.
•
This command must be configured for iBGP peers to
which the link bandwidth extended community
attribute is to be propagated.
which the link bandwidth extended community
attribute is to be propagated.
Step 8
end
Example:
Router(config-router-af)# end
Exits address family configuration mode, and enters Privileged
EXEC mode.
EXEC mode.