Cisco Cisco IOS Software Release 12.2(14)S

BGP Link Bandwidth

How to Configure BGP Link Bandwidth

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.

•

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.

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.

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.

•

This command must be entered on each router that
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.

•

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.

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.

•

This command must be configured for iBGP peers to
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.