[chassis][202405]: Default hash-offset 0 causes ecmp load balancing failure on chassis-packet #19746
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@kperumalbfn f.y.i trying to not set the default for chassis-packet |
mssonicbld
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Sep 4, 2024
Why I did it Fixes sonic-net#19746 switch.json in swss docker sets the default hash offset to 0 for chassis-packet. The change was recently introduced via sonic-net#18912 which was supposed to be only for T0/T1. On chassis-packet, each asics needs to set an unique hash offset to set an unique offset for load balancing algorithm. The new change overwrites platform setting and resets the hash-offset to 0 on all asics. This breaks the ecmp load balancing algorithm on chassis-packet. How I did it Remove the default hash-offset setting for chassis-packet. This setting is provided by platform based on platform specific rules. How to verify it Run sonic-mgmt fib/test_fib.py Signed-off-by: anamehra <anamehra@cisco.com>
mssonicbld
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that referenced
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Sep 5, 2024
Why I did it Fixes #19746 switch.json in swss docker sets the default hash offset to 0 for chassis-packet. The change was recently introduced via #18912 which was supposed to be only for T0/T1. On chassis-packet, each asics needs to set an unique hash offset to set an unique offset for load balancing algorithm. The new change overwrites platform setting and resets the hash-offset to 0 on all asics. This breaks the ecmp load balancing algorithm on chassis-packet. How I did it Remove the default hash-offset setting for chassis-packet. This setting is provided by platform based on platform specific rules. How to verify it Run sonic-mgmt fib/test_fib.py Signed-off-by: anamehra <anamehra@cisco.com>
vvolam
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Sep 12, 2024
Why I did it Fixes sonic-net#19746 switch.json in swss docker sets the default hash offset to 0 for chassis-packet. The change was recently introduced via sonic-net#18912 which was supposed to be only for T0/T1. On chassis-packet, each asics needs to set an unique hash offset to set an unique offset for load balancing algorithm. The new change overwrites platform setting and resets the hash-offset to 0 on all asics. This breaks the ecmp load balancing algorithm on chassis-packet. How I did it Remove the default hash-offset setting for chassis-packet. This setting is provided by platform based on platform specific rules. How to verify it Run sonic-mgmt fib/test_fib.py Signed-off-by: anamehra <anamehra@cisco.com>
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Description
switch.json in swss docker sets the default hash offset to 0 for chassis-packet. The change was recently introduced via #18912 which was supposed to be only for T0/T1. On chassis-packet, each asics needs to set an unique hash offset to set an unique offset for load balancing algorithm. The new change overwrites platform setting and resets the hash-offset to 0 on all asics. This breaks the ecmp load balancing algorithm on chassis-packet.
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