Question
Describe bgp communities. Name well-known communities?
Answers
BGP communities are commonly used to control route policies in the BGP environment and used as flags in order to mark it over the set of network prefixes. BGP communities’ information can be shared with a neighbor by using the command “neighbor x.x.x.x send-community standard | extended | both” and can be applied using route-maps to a defined neighbor. Some well-known BGP communities are:

Local-AS: Share the prefixes with iBGP-confederation peers only.

No-Advertise: Do not share the prefixes with anyone.

No-Export: Do not share the prefixes with another Global AS, share within the Public-AS only.

Internet: Share the prefixes with all.   Your Comment




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