bgp_long_lived_graceful_restart

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Github Action edited this page Jun 25, 2024 · 2 revisions

RT-1.14: BGP Long-Lived Graceful Restart

Summary

BGP Long-Lived Graceful Restart

Procedure

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  - Ensure that the stale prefixes are not withdrawn until the end of the LLGR timer value.
  - Ensure that prefixes are withdrawn, and traffic cannot be forwarded between ATE port-1 and port-2 after the LLGR timer expiry.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.

Config Parameter coverage

/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

Telemetry Parameter coverage

/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

OpenConfig Path and RPC Coverage

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

Minimum DUT platform requirement

N/A