Port-Groups: Flood Control Configuration

CoS-based flood control prevents configured ports from being disrupted by a traffic storm by rate limiting specific types of packets through those ports. When flood control is enabled on a port, incoming traffic is monitored over one second intervals. During an interval, the incoming traffic rate for each configured traffic type (unicast, broadcast, or multicast) is compared with the configured traffic flood control rate, specified in packets per second. If, during a one second interval, the incoming traffic of a configured type reaches the traffic flood control rate configured on the port, CoS-based flood control drops the traffic until the interval ends. Packets are then allowed to flow again until the limit is again reached.

Flood control port-groups contain user settings for specific types of ports and their matching flood limiting configurations. Port groups 0.0 and 0.1 exist by default on the S- and K-Series. Port groups 0.0 exists by default on the 7100-Series. Each new group can be configured with a name and ports added to each group according to device port-type. Use the show cos port-config flood-ctrl command to display each flood control port-group configured by group and type, with group name and associated ports.

The following example displays default values for the show cos port-config flood-ctrl command S-Series output (S-, K-Series):

System(rw)->show cos port-config flood-ctrl
Flood Rate Limiting Port Configuration Entries
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Port Group Name  :S-Series Flood Ctrl
Port Group       :0
Port Type        :0
Assigned Ports   :ge.1.1-48;tg.1.1-4
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The following example displays default values for the show cos port-config flood-ctrl command 7100-Series output (7100-Series):

System(rw)->show cos port-config flood-ctrl
Flood Rate Limiting Port Configuration Entries
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Port Group Name  :TOR-Series Flood Ctrl
Port Group       :0
Port Type        :0
Assigned Ports   :tg.1.1-48;fg.1.1-4
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Additional port groups can be created using the set cos port-config flood-ctrl command. Port group name and associated ports can be configured. You need to: