[action] [PR:18766] [DualToR] enforce same loopback ip and drop bgp pkts on loopback1 for dualtor#18913
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[action] [PR:18766] [DualToR] enforce same loopback ip and drop bgp pkts on loopback1 for dualtor#18913mssonicbld wants to merge 1 commit intosonic-net:202411from
mssonicbld wants to merge 1 commit intosonic-net:202411from
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… dualtor (sonic-net#18766) What is the motivation for this PR? This PR updates the DualToR config to enforce the same loopback1 IP address for both ToRs. Based on a recent Incident 628608070 : [SONiC RCA][SLB_DNC] Gemini Tors dropping vip traffic, we need to block BGP from being established on loopback1. How did you do it? Assign the same loopback1 IP to both ToRs. Added an iptables rules to drop the packets sonic-net/sonic-host-services#262 How did you verify/test it? Confirmed both ToRs used the same loopback1 IP, and verify the drop rule.
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Original PR: #18766 |
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Description of PR
Summary:
Fixes # (issue)
https://msazure.visualstudio.com/One/_workitems/edit/32910131/
Type of change
Back port request
Approach
What is the motivation for this PR?
This PR updates the DualToR config to enforce the same loopback1 IP address for both ToRs.
Based on a recent Incident 628608070 : [SONiC RCA][SLB_DNC] Gemini Tors dropping vip traffic, we need to block BGP from being established on loopback1.
How did you do it?
Assign the same loopback1 IP to both ToRs.
Added an iptables rules to drop the packets sonic-net/sonic-host-services#262
How did you verify/test it?
Confirmed both ToRs used the same loopback1 IP, and verify the drop rule.
Any platform specific information?
Supported testbed topology if it's a new test case?
Documentation