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[image_config]: Update DHCP rate-limit (#17132)

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Change DHCP rate limit in SONiC copp configuration to 100 PPS as this is
necessary to ensure that DHCP flood does not cause LACP/BGP flaps in all
scenarios

This is an extension to the change in image_config: copp: Enable rate limiting 
for bgp, lacp, dhcp, lldp, macsec and udld #14859 and sonic-mgmt change in 
[tests/copp]: Update copp mgmt tests to support new rate-limits sonic-mgmt#8199

Why I did it
300 PPS is not sufficient to prevent LACP/BGP flaps in all cases. 100 PPS seems to
provide better resiliency against DHCP traffic flood to CPU.

Microsoft ADO 25776614:

Send DHCP broadcast packets to DUT and verify that they are trapped to CPU at 100 PPS.

Signed-off-by: Prabhat Aravind <paravind@microsoft.com>
This commit is contained in:
prabhataravind 2023-11-22 15:02:17 -08:00 committed by mssonicbld
parent 733a902a70
commit aa8a5403b8
1 changed files with 2 additions and 2 deletions
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4
files/image_config/copp/copp_cfg.j2
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@ -34,8 +34,8 @@
"queue": "4",
"meter_type":"packets",
"mode":"sr_tcm",
"cir":"300",
"cbs":"300",
"cir":"100",
"cbs":"100",
"red_action":"drop"
},
"queue1_group1": {