Rule ID
SV-283910r1203979_rule
Version
V1R1
CCIs
A traffic storm occurs when packets flood a VPLS bridge, creating excessive traffic and degrading network performance. Traffic storm control prevents VPLS bridge disruption by suppressing traffic when the number of packets reaches configured threshold levels. Traffic storm control monitors incoming traffic levels on a port and drops traffic when the number of packets reaches the configured threshold level during any one-second interval.
Review the router configuration to verify Quality-of-Service (QoS) SAP-ingress is applied on the service access point (SAP), deploying VPLS to control broadcast storm. Verify the QoS SAP-ingress policy is applied to the SAP using the configuration below: - show service id 20 sap 1/1/c7/1 qos | match "Ingress qos-policy" Ingress qos-policy : 100 Egress qos-policy : 1 If the QoS SAP-ingress is not applied to the SAP, this is a finding.
Configure QoS SAP-ingress to control broadcast storm for each VPLS bridge domain. Base the suppression threshold on expected traffic rates plus some additional capacity. Configure QoS SAP-ingress using the example below: - configure qos sap-ingress 100 create - config>qos>sap-ingress# policer 10 create - config>qos>sap-ingress>policer# rate 12000 - config>qos>sap-ingress>policer# exit - config>qos>sap-ingress# fc "be" create - config>qos>sap-ingress>fc# broadcast-policer 10 - config>qos>sap-ingress>fc# exit - config>qos>sap-ingress# exit all Apply the QoS SAP-ingress policy to the SAP using the example below: - configure service vpls 20 sap 1/1/c7/1 ingress qos 100