Validate BGP in multipath UCMP support with link bandwidth community

TESTBED_DUT_ATE_4LINKS

• Connect DUT port 1, 2 and 3 to ATE port 1, 2 and 3 respectively
• Configure IPv4/IPv6 addresses on the interfaces
• Establish eBGP sessions between:
  • ATE port-1 and DUT port-1
  • ATE port-2 and DUT port-2
  • ATE port-3 and DUT port-3
• Enable an Accept-route all import-policy/export-policy for eBGP session under the neighbor AFI/SAFI
• Create an IPv4 internal target network attached to ATE port 2 and 3

• RT-1.52.1: Verify use of community type

  • Configure ATE port 1, 2 and 3 on different AS
  • Enable multipath, set maximum-paths limit to 2, enable allow multiple AS, and send community type to BOTH (STANDARD and EXTENDED)
    • /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/afi-safis/afi-safi/use-multiple-paths/config/enabled
    • /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/afi-safis/afi-safi/use-multiple-paths/ebgp/config/allow-multiple-as
    • /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/afi-safis/afi-safi/use-multiple-paths/ebgp/config/maximum-paths
    • /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/config/send-community-type
    • /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/use-multiple-paths/ebgp/link-bandwidth-ext-community/config/enabled
  • Advertise equal cost paths from port2 and port3 of ATE
  • Check entries in FIB for advertised prefix, it should have 2 entries
    • /network-instances/network-instance/afts/next-hop-groups/next-hop-group/next-hops
  • Initiate traffic from ATE port-1 to the DUT and destined to internal target network
  • Check entire traffic should only be unequally forwarded between DUT port2 and port3

• /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/afi-safis/afi-safi/use-multiple-paths/config/enabled
• /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/afi-safis/afi-safi/use-multiple-paths/ebgp/config/allow-multiple-as
• /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/afi-safis/afi-safi/use-multiple-paths/ebgp/config/maximum-paths
• /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/config/send-community-type
• /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/use-multiple-paths/ebgp/link-bandwidth-ext-community/config/enabled

• /network-instances/network-instance/afts/ipv4-unicast/ipv4-entry/state
• /network-instances/network-instance/afts/ipv4-unicast/ipv4-entry/state/next-hop-group
• /network-instances/network-instance/afts/next-hop-groups/next-hop-group[id=]/state
• /network-instances/network-instance/afts/next-hop-groups/next-hop-group/next-hops

rpcs:
  gnmi:
    gNMI.Get:
    gNMI.Subscribe:

• FFF - Fixed Form Factor