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Github Action edited this page Jun 10, 2024 · 1 revision

RT-7.3: BGP Policy AS Path Set

Summary

BGP policy configuration for AS Paths and Community Sets

Procedure

  • RT-7.3.1 - Test setup

    • Generate config for 2 DUT ports, with DUT port 1 eBGP session to ATE port 1

    • Generate config for ATE 2 ports, with ATE port 1 eBGP session to DUT port 1

    • Configure ATE port 1 to advertise ipv4 and ipv6 prefixes using the following as paths

      • prefix-set-1 with as path [100, 200, 300]
      • prefix-set-2 with as path [100, 400, 300]
      • prefix-set-3 with as path [110]
      • prefix-set-4 with as path [400]
      • prefix-set-5 with as path [100, 300, 200]
      • prefix-set-6 with as path [1, 100, 200, 300, 400]

    • Establish eBGP sessions between ATE port-1 and DUT port-1

    • Generate traffic from ATE port-2 to all prefixes

    • Validate that traffic is received on ATE port-1 for all installed prefixes

  • RT-7.3.2 - Configure as-path-sets

    • Configure DUT with the following routing policies

      • Create the following /routing-policy/defined-sets/bgp-defined-sets/as-path-sets/as-path-set/

        • Create as-path-set-name = "my_3_aspaths" with members
          • { as-path-set-member = [ "100", "200", "300" ] }
        • Create an as-path-set-name 'my_regex_aspath-1' with members
          • { as-path-set-member = [ "^100", "20[0-9]", "200$" ] }
        • Create an as-path-set-name "my_regex_aspath-2" as follows
          • { as-path-set-member = [ "(^100)(.*)+(300$)" ] }

      • Create /routing-policy/policy-definitions/policy-definition named 'match_any_aspaths' with the following statements

        • statement[name='accept_any_my_3_aspaths']/
          • conditions/bgp-conditions/match-community-set/config/community-set = 'my_3_aspaths'
          • conditions/bgp-conditions/match-community-set/config/match-set-options = ANY
          • actions/config/policy-result = ACCEPT_ROUTE

      • Create /routing-policy/policy-definitions/policy-definition named 'match_not_my_3_aspaths' with the following statements

        • statement[name='accept_not_my_3_aspaths']/
          • conditions/bgp-conditions/match-community-set/config/community-set = 'my_3_aspaths'
          • conditions/bgp-conditions/match-community-set/config/match-set-options = INVERT
          • actions/config/policy-result = ACCEPT_ROUTE

      • Create /routing-policy/policy-definitions/policy-definition named 'match_my_regex_aspath-1' with the following statements

        • statement[name='accept_my_regex_aspath-1']/
          • conditions/bgp-conditions/match-community-set/config/community-set = 'my_regex_aspath-1'
          • conditions/bgp-conditions/match-community-set/config/match-set-options = ANY
          • actions/config/policy-result = ACCEPT_ROUTE

      • Create /routing-policy/policy-definitions/policy-definition named 'match_my_regex_aspath-2' with the following statements

        • statement[name='accept_my_regex_aspath-2']/
          • conditions/bgp-conditions/match-community-set/config/community-set = 'my_regex_aspath-2'
          • conditions/bgp-conditions/match-community-set/config/match-set-options = ANY
          • actions/config/policy-result = ACCEPT_ROUTE

  • RT-7.3.3 - Replace /routing-policy DUT config

    • For each DUT policy-definition
      • Replace the configuration for BGP neighbor policy (.../apply-policy/config/import-policy) to the currently tested policy
        • Verify prefixes sent, received and installed are as expected
      • Send traffic
        • Verify traffic is forwarded for prefixes with matching policy
        • Verify traffic is not forwarded for prefixes without matching policy

Expected as-path matches

prefix-set match_any_aspaths match_not_my_3_aspaths match_my_regex_aspath-1 my_regex_aspath-2
prefix-set-1 accept reject accept accept
prefix-set-2 accept reject accept accept
prefix-set-3 reject accept reject reject
prefix-set-4 reject accept reject reject
prefix-set-5 accept reject accept reject
prefix-set-6 accept reject accept reject

Config Parameter Coverage

Policy definition

  • /routing-policy/policy-definitions/policy-definition/config/name
  • /routing-policy/policy-definitions/policy-definition/statements/statement/config/name

Policy for as-path match

  • /routing-policy/defined-sets/bgp-defined-sets/as-path-sets/as-path-set/config/as-path-set-name
  • /routing-policy/defined-sets/bgp-defined-sets/as-path-sets/as-path-set/config/as-path-set-member
  • /routing-policy/policy-definitions/policy-definition/statements/statement/conditions/bgp-conditions/match-as-path-set/config/as-path-set
  • /routing-policy/policy-definitions/policy-definition/statements/statement/conditions/bgp-conditions/match-as-path-set/config/match-set-options
  • /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/apply-policy/config/ import-policy

Telemetry Parameter Coverage

Policy definition state

  • /routing-policy/policy-definitions/policy-definition/state/name
  • /routing-policy/policy-definitions/policy-definition/statements/statement/state/name

Policy for as-path match state

  • /routing-policy/defined-sets/bgp-defined-sets/as-path-sets/as-path-set/state/as-path-set-name
  • /routing-policy/defined-sets/bgp-defined-sets/as-path-sets/as-path-set/state/as-path-set-member
  • /routing-policy/policy-definitions/policy-definition/statements/statement/conditions/bgp-conditions/match-as-path-set/state/as-path-set
  • /routing-policy/policy-definitions/policy-definition/statements/statement/conditions/bgp-conditions/match-as-path-set/state/match-set-options

Paths to verify policy state

  • /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/apply-policy/state/export-policy
  • /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/apply-policy/state/import-policy

Paths to verify prefixes sent and received

  • /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/state/prefixes/sent
  • /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/state/prefixes/received-pre-policy
  • /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/state/prefixes/received
  • /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/state/prefixes/installed

OpenConfig Path and RPC Coverage

The below yaml defines the OC paths intended to be covered by this test. OC paths used for test setup are not listed here.

paths:
  ## Config Paths ##
  /routing-policy/policy-definitions/policy-definition/config/name:
  /routing-policy/policy-definitions/policy-definition/statements/statement/config/name:
  /routing-policy/policy-definitions/policy-definition/statements/statement/conditions/match-prefix-set/config/prefix-set:
  /routing-policy/policy-definitions/policy-definition/statements/statement/conditions/match-prefix-set/config/match-set-options:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/apply-policy/config/import-policy:
## State Paths ##
  /interfaces/interface/ethernet/state/mac-address:

rpcs:
  gnmi:
    gNMI.Get:
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