BGP Long-Lived Graceful Restart

• Establish BGP sessions as follows between ATE and DUT
  • ATE Port-1 -------- DUT Port-1.
  • DUT Port-2 -------- ATE Port-2.
• Validate received capabilities at DUT and ATE reflect support for graceful restart at the default timer values.
• For IPv4 and IPv6 routes:
  • Advertise prefixes from ATE to DUT.
  • Trigger DUT session restart by disconnecting TCP session between DUT - ATE Port2 and determine that:
    • Forwarded traffic between between ATE port-1 and DUT port-1 for the duration of the
      specified stale routes time (default), during the stale state traffic shouldnt be impacted. 
    • Dropped after the stale routes timer has expired.
    • Forwarded again between ATE port-1 and DUT port-1 after the session is re-established.
  • Enable Long-Lived Graceful Restart on a per-bgp neighbor basis on DUT. Specify the LLGR timer to be configured to be 600 seconds. Trigger DUT session restart.
    • Ensure that the stale prefixes are not withdrawn until the end of the LLGR timer value. 
    • Ensure that prefixes are withdrawn, and traffic cannot be forwarded between ATE port-1 and port-2 after the LLGR timer expiry.
  • Induce
    • Import policy changes
    • Export policy changes
    • Add 5 more BGP peers
    • Remove 5 more BGP peers(block the BGP using filter)
    • Routing Process restart
  • During above mentioned changes, LLGR shouldn't be impacted and persist during/after the changes.

• /global/graceful-restart
• /global/graceful-restart/config
• /global/graceful-restart/config/enabled
• /global/graceful-restart/config/restart-time
• /global/graceful-restart/config/stale-routes-time
• /global/graceful-restart/config/helper-only
• /global/afi-safis/afi-safi/graceful-restart
• /global/afi-safis/afi-safi/graceful-restart/config
• /global/afi-safis/afi-safi/graceful-restart/config/enabled
• /neighbors/neighbor/graceful-restart
• /neighbors/neighbor/graceful-restart/config
• /neighbors/neighbor/graceful-restart/config/enabled
• /neighbors/neighbor/graceful-restart/config/restart-time
• /neighbors/neighbor/graceful-restart/config/stale-routes-time
• /neighbors/neighbor/graceful-restart/config/helper-only
• /neighbors/neighbor/afi-safis/afi-safi/graceful-restart
• /neighbors/neighbor/afi-safis/afi-safi/graceful-restart/config
• /neighbors/neighbor/afi-safis/afi-safi/graceful-restart/config/enabled

• /global/graceful-restart/state
• /global/graceful-restart/state/enabled
• /global/graceful-restart/state/restart-time
• /global/graceful-restart/state/stale-routes-time
• /global/graceful-restart/state/helper-only
• /global/afi-safis/afi-safi/graceful-restart/state
• /global/afi-safis/afi-safi/graceful-restart/state/enabled
• /neighbors/neighbor/graceful-restart/state
• /neighbors/neighbor/graceful-restart/state/enabled
• /neighbors/neighbor/graceful-restart/state/restart-time
• /neighbors/neighbor/graceful-restart/state/stale-routes-time
• /neighbors/neighbor/graceful-restart/state/helper-only
• /neighbors/neighbor/graceful-restart/state/peer-restart-time
• /neighbors/neighbor/graceful-restart/state/peer-restarting
• /neighbors/neighbor/graceful-restart/state/local-restarting
• /neighbors/neighbor/graceful-restart/state/mode
• /neighbors/neighbor/afi-safis/afi-safi/graceful-restart/state
• /neighbors/neighbor/afi-safis/afi-safi/graceful-restart/state/enabled
• /neighbors/neighbor/afi-safis/afi-safi/graceful-restart/state/received
• /neighbors/neighbor/afi-safis/afi-safi/graceful-restart/state/advertised

paths:
  /acl/acl-sets/acl-set/acl-entries/acl-entry/actions/config/forwarding-action:
  /acl/acl-sets/acl-set/acl-entries/acl-entry/ipv4/config/destination-address:
  /acl/acl-sets/acl-set/acl-entries/acl-entry/ipv4/config/source-address:
  /acl/interfaces/interface/ingress-acl-sets/ingress-acl-set/config/set-name:
  /acl/interfaces/interface/ingress-acl-sets/ingress-acl-set/config/type:
  /acl/interfaces/interface/interface-ref/config/interface:
  /interfaces/interface/config/description:
  /interfaces/interface/config/enabled:
  /interfaces/interface/config/type:
  /interfaces/interface/state/oper-status:
  /interfaces/interface/subinterfaces/subinterface/ipv4/addresses/address/config/prefix-length:
  /interfaces/interface/subinterfaces/subinterface/ipv6/addresses/address/config/prefix-length:
  /interfaces/interface/subinterfaces/subinterface/vlan/match/single-tagged/config/vlan-id:
  /network-instances/network-instance/config/type:
  /network-instances/network-instance/protocols/protocol/bgp/global/afi-safis/afi-safi/config/enabled:
  /network-instances/network-instance/protocols/protocol/bgp/global/config/as:
  /network-instances/network-instance/protocols/protocol/bgp/global/config/router-id:
  /network-instances/network-instance/protocols/protocol/bgp/global/graceful-restart/config/enabled:
  /network-instances/network-instance/protocols/protocol/bgp/global/graceful-restart/config/restart-time:
  /network-instances/network-instance/protocols/protocol/bgp/global/graceful-restart/config/stale-routes-time:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/afi-safis/afi-safi/config/enabled:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/config/enabled:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/config/peer-as:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/config/peer-group:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/graceful-restart/state/peer-restart-time:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/state/session-state:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/state/supported-capabilities:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/timers/config/hold-time:
  /network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/timers/config/keepalive-interval:
  /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/apply-policy/config/export-policy:
  /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/apply-policy/config/import-policy:
  /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/config/peer-as:
  /network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/config/peer-group-name:
  /routing-policy/policy-definitions/policy-definition/statements/statement/actions/bgp-actions/config/set-local-pref:
  /routing-policy/policy-definitions/policy-definition/statements/statement/actions/bgp-actions/config/set-med:
  /routing-policy/policy-definitions/policy-definition/statements/statement/actions/config/policy-result:
rpcs:
  gnmi:
    gNMI.Get:
    gNMI.Set:
    gNMI.Subscribe:

N/A