From aa8a5403b871f87e0719f7102da64a54b6c1cb08 Mon Sep 17 00:00:00 2001 From: prabhataravind <108555774+prabhataravind@users.noreply.github.com> Date: Wed, 22 Nov 2023 15:02:17 -0800 Subject: [PATCH] [image_config]: Update DHCP rate-limit (#17132) 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 --- files/image_config/copp/copp_cfg.j2 | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/files/image_config/copp/copp_cfg.j2 b/files/image_config/copp/copp_cfg.j2 index 08366e57f6..f3550677d7 100755 --- a/files/image_config/copp/copp_cfg.j2 +++ b/files/image_config/copp/copp_cfg.j2 @@ -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": {