BGP communitiesΒΆ

Communities:

fmt do_not_announce_to_peer announce_to_peer do_not_announce_to_any
std 0:peer_as 999:peer_as 0:999
ext rt:0:peer_as rt:999:peer_as rt:0:999
lrg 999:0:peer_as 999:999:peer_as 999:0:999

AS2

  • announced prefixes:

    Prefix ID Comms Prefix Expected result
    AS2_only_to_AS1_s 0:999, 999:1 2.0.1.0/24 only AS1 receives the prefix
    AS2_only_to_AS1_e rt:0:999, rt:999:1 2.0.2.0/24 only AS1 receives the prefix
    AS2_only_to_AS1_l 999:0:999, 999:999:1 2.0.3.0/24 only AS1 receives the prefix
    AS2_only_to_AS131073_e 0:999, rt:999:131073 2.0.4.0/24 only AS131073 receives the prefix
    AS2_only_to_AS131073_l 999:0:999, 999:999:131073 2.0.5.0/24 only AS131073 receives the prefix
    AS2_bad_cust_comm1 65501:65501 2.0.6.0/24 AS1 and AS131073 receive the prefix without the cust community (scrubbed by the rs)

AS1

  • configured to have its routes tagged with cust_comm1 (65501:65501, 999:65501:65501, rt:65501:65501)

  • announced prefixes:

    Prefix ID Comms Prefix Expected result
    AS1_good1   1.0.1.0/24 AS2 and AS131073 receive the prefix, tagged with the custom community

AS131073