BGP dmzlink-bw feature
The dmzlink-bw feature is used to configure BGP to distribute traffic proportionally over external links with unequal bandwidth when multipath load balancing is enabled between directly connected eBGP neighbors. This feature is used as part of BGP traffic engineering.
The bgp dmzlink-bw command under the address-family configuration of BGP, allows multipath load balancing to distribute link traffic proportionally to the bandwidth of each external link and to advertise the bandwidth of these links to iBGP peers as an extended community.
Links:
https://forum.networklessons.com/t/introduction-to-bgp/1227/82?u=lagapides