• Author : Denis Evoy

 
 

Discard unimportable VPN paths

Description In a Service Provider network, a Provider Edge (PE) device learns VPN paths from remote PEs and uses the Route Target extended communities carried by those paths to determine which customer VRF(s) the paths should be imported into (from where they can be subsequently advertised to Customer Edge (CE) devices). In large Service Provider networks, each PE device may learn a significant number of VPN paths even though it might only handle a relatively small number of customer VRFs. As a result, such PE devices are really only interested in a subset of the VPN paths that they receive...
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