BGP deterministic MED and always compare MED options

The BGP MED (multiple exit discriminator) is an optional non-transitive attribute. That means this value is always carried along with BGP update and can be dropped if the BGP process doesn’t understand it. Let me first write about my understanding on both commands bgp deterministic-med command compares MED variable when choosing routes advertised by different peers … Continue reading BGP deterministic MED and always compare MED options

Update-source ‘interface’ in BGP

When we define a neighbor under BGP process, by default BGP uses the appropriate egress interface IP address to reach the neighbor. Once both the peers agree on the parameters the neighborship comes up. If we want to build the neighborship over a specific interface IP address rather than the egress interface IP address, then … Continue reading Update-source ‘interface’ in BGP