Track 2 - Internet Routing and IP Network management (7-Oct-96)

Autonomous Systems and EGP

2) New BGP Features

C) Communities

  1. Communities is a optional transitive attribute

  2. Tags routes to group them for policy

  3. Communities help create the policy calculations

  4. 2 bytes of AS, 2 bytes of Value

  5. Special values

    • community no-export (0xFFFFFF01)

      - don't export outside AS

    • community no-advertise (0xFFFFFF02)

      - don't advertise to any neighbor

    • community no-export-subconfed (0xFFFFFF03)

      - don't advertise outside this subconfederation

  6. MCI used to dramatically simplify policy configuration