To configure an AS-PATH ACL to filter a specific AS_PATH value, use these commands in the following sequence.1 Assign a name to a AS-PATH ACL and enter AS-PATH ACL mode.CONFIGURATION modeip as-path access-list as-path-name2 Enter the parameter to match BGP AS-PATH for filtering.CONFIG-AS-PATH mode{deny | permit} filter parameterThis is the filter that is used to match the AS-path. The entries can be any format, letters, numbers, or regular expressions.You can enter this command multiple times if multiple filters are desired.For accepted expressions, refer to Regular Expressions as Filters.3 Return to CONFIGURATION mode.AS-PATH ACL modeexit4 Enter ROUTER BGP mode.CONFIGURATION moderouter bgp as-number5 Use a configured AS-PATH ACL for route filtering and manipulation.CONFIG-ROUTER-BGP modeneighbor {ip-address | peer-group-name} filter-list as-path-name {in | out}If you assign an non-existent or empty AS-PATH ACL, the software allows all routes.Example of the show ip bgp paths CommandTo view all BGP path attributes in the BGP database, use the show ip bgp paths command in EXEC Privilege mode.Dell#show ip bgp pathsTotal 30655 PathsAddress Hash Refcount Metric Path0x4014154 0 3 18508 701 3549 19421 i0x4013914 0 3 18508 701 7018 14990 i0x5166d6c 0 3 18508 209 4637 1221 9249 9249 i0x5e62df4 0 2 18508 701 17302 i0x3a1814c 0 26 18508 209 22291 i0x567ea9c 0 75 18508 209 3356 2529 i0x6cc1294 0 2 18508 209 1239 19265 i0x6cc18d4 0 1 18508 701 2914 4713 17935 i0x5982e44 0 162 18508 209 i0x67d4a14 0 2 18508 701 19878 ?0x559972c 0 31 18508 209 18756 i0x59cd3b4 0 2 18508 209 7018 15227 i0x7128114 0 10 18508 209 3356 13845 i0x536a914 0 3 18508 209 701 6347 7781 i0x2ffe884 0 1 18508 701 3561 9116 21350 i0x2ff7284 0 99 18508 701 1239 577 855 ?0x2ff7ec4 0 4 18508 209 3561 4755 17426 i0x2ff8544 0 3 18508 701 5743 2648 i0x736c144 0 1 18508 701 209 568 721 1494 i0x3b8d224 0 10 18508 209 701 2019 i0x5eb1e44 0 1 18508 701 8584 16158 i0x5cd891c 0 9 18508 209 6453 4759 i--More--Border Gateway Protocol IPv4 (BGPv4) 205
