Closed Hedgehog-Guru closed 1 year ago
It appears FRR doesn't support graceful restart for EVPN address family https://github.com/FRRouting/frr/issues/9749
@adyeung Can you please help to assign someone to confirm if warmboot with EVPN will not be supported in SONiC? EVPN HLD mentions that it is supported. Is it tested?
@yxieca to start the thread with @adyeung on EVPN warmboot issues.
@nkelapur from BRCM will followup
FRR currently does not support BGP Graceful restart for EVPN address-family. Hence EVPN warm-reboot will not be hitless in Sonic until this support is available in FRR. Updated EVPN HLD with this note
@nkelapur could you please point me that note? could not find it in the HLD: https://github.com/sonic-net/SONiC/blob/master/doc/vxlan/EVPN/EVPN_VXLAN_HLD.md
Looks like I missed creating a pull request for the proposed change. I have done it now. https://github.com/sonic-net/SONiC/pull/1227
Not supported. Closing as hld is now updated
Description
In EVPN vxlan scenario with proper graceful restart config inside FRR, there is traffic loss during warm-reboot
Steps to reproduce the issue:
Topology: two switches connected with single port. Each switch has L2 access port to any traffic generator able to send L2 frames. Ixia in my case.
Describe the results you received:
Traffic loss
Describe the results you expected:
No any traffic impact
Output of
show version
:Output of
show techsupport
:sonic_dump_qa-eth-vt03-1-4600ca1_20221007_203258.tar.gz sonic_dump_qa-eth-vt03-2-3700v_20221007_203257.tar.gz
Additional information you deem important (e.g. issue happens only occasionally):