Layer 2 Broadcast Storm Control - Dell Force10 C150 Configuration Manual

Enable Broadcast Storm Control on an Interface
Enabling Storm control on an interface affects only ingress broadcasts.
Task
On the E-Series, suppress Layer 3 all-hosts and subnet
broadcasts on ingress if they exceed a user-defined
limit.
On the C-Series and S-Series, suppress Layer 3 all-host
and subnet broadcasts on ingress if they exceed a
user-defined limit.
Enable Broadcast Storm Control on all Interfaces
The result of enabling Storm Control globally varies by platform:
• On the E-Series, enabling Storm Control from CONFIGURATION mode limits ingress and egress
broadcast traffic on all interfaces.
• On the C-Series and S-Series, enabling Storm Control from CONFIGURATION mode limits only
ingress broadcast traffic, but still on all interfaces.
Task
On the E-Series, suppress Layer 3 all-hosts and subnet
broadcasts on ingress and egress if they exceed a
user-defined limit.
On the C-Series and S-Series, suppress Layer 3 all-host
and subnet broadcasts on ingress if they exceed a
user-defined limit.

Layer 2 Broadcast Storm Control

Unknown-unicast packets are those for which the switch has no entry in its MAC address table for the
packet destination MAC. In this case the switch broadcasts (floods) these packets on the VLAN. This extra
traffic unnecessary and can reduce performance.
FTOS Behavior: On the E-Series, if unknown-unicast Storm Control is enabled on an interface or
globally on the ingress, and DSCP marking is enabled and set to DSCP=2 for data traffic, the traffic is
queued to Queue 2 instead of Queue 0.
Command Syntax
storm-control broadcast percentage
in out
[ |
partial-percentage
storm-control broadcast
packets-per-second in
Command Syntax
storm-control broadcast percentage
in out
[ |
partial-percentage
storm-control broadcast
packets-per-second in
Command Mode
INTERFACE
]
INTERFACE
Command Mode
CONFIGURATION
]
CONFIGURATION
Broadcast Storm Control | 1045