Symptom
With ingress QOS policy configured with class-default policer rate as 1%,
CFM session goes down
Conditions
Issue is seen with ingress policer(lesser rate) and egress traffic congestion
Further Problem Description
Problem Description
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CFM CCM packets should skip QOS path so that they don't get impacted by User configured policy.
As per the current design these are getting accounted under class default and getting impacted for ingress policer and egerss congestion.
CVT04(config)#
RP/6/RP0:CVT04(config)#policy-map Eline-CAD-child-Uni-ingress-profile
RP/6/RP0:CVT04(config-pmap)# class data-confirm-ingress-uni
RP/6/RP0:CVT04(config-pmap-c)# set qos-group 3
RP/6/RP0:CVT04(config-pmap-c)# set traffic-class 3
RP/6/RP0:CVT04(config-pmap-c)# !
RP/6/RP0:CVT04(config-pmap-c)# class data-exceed-ingress-uni
RP/6/RP0:CVT04(config-pmap-c)# set qos-group 3
RP/6/RP0:CVT04(config-pmap-c)# set traffic-class 3
RP/6/RP0:CVT04(config-pmap-c)# !
RP/6/RP0:CVT04(config-pmap-c)# class real-time-data-ingress-uni
RP/6/RP0:CVT04(config-pmap-c)# set qos-group 5
RP/6/RP0:CVT04(config-pmap-c)# set traffic-class 5
RP/6/RP0:CVT04(config-pmap-c)# !
RP/6/RP0:CVT04(config-pmap-c)# class class-default
RP/6/RP0:CVT04(config-pmap-c)# police rate percent 1
RP/6/RP0:CVT04(config-pmap-c-police)# !
RP/6/RP0:CVT04(config-pmap-c-police)# !
RP/6/RP0:CVT04(config-pmap-c-police)#commit
37 IST: cfmd[1078]: %L2-CFM-6-CC_ERROR : Peer MEP error change: error flags or remote interface state changed - domain VZONENET-Flex-1, service ELine-9140, local MEP ID 950, local interface TenGigE7/2/0/4/2.340, peer MEP ID 131, peer MAC address 80e0.1dd0.2b59, errors set: received CCM with RDI bit set; current: received CCM with RDI bit set;
RP/6/RP0:Dec 13 01:41:08.650 IST: cfmd[1078]: %L2-CFM-6-CC_ERROR : Peer
Impact
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CFM session flaps
Image
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6531
Reproducibility
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100%
