Cisco Catalyst 4500 Series - Enabling Multicast Storm Control

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 65 Configuring Storm Control
Enabling Multicast Storm Control
Gi2/1 Link Down Enabled Disabled 100k bps
Switch# show interfaces counters storm-control
Port Broadcast Multicast Level TotalSuppressedPackets
Gi2/1 Enabled Disabled 100k bps 0
Switch# show interface gigabitethernet 2/1 capabilities
GigabitEthernet2/1
Model: WS-X4648-RJ45V+E-RJ-45
Type: 10/100/1000-TX
Speed: 10,100,1000,auto
Duplex: half,full,auto
Auto-MDIX: yes
EEE: no
Trunk encap. type: 802.1Q
Trunk mode: on,off,desirable,nonegotiate
Channel: yes
Broadcast suppression: percentage(0-100), hw
Multicast suppression: percentage(0-100), hw
Flowcontrol: rx-(off,on,desired),tx-(off,on,desired)
VLAN Membership: static, dynamic
Fast Start: yes
CoS rewrite: yes
ToS rewrite: yes
Inline power: yes (Cisco Voice Protocol/IEEE Protocol 802.3af)
SPAN: source/destination
UDLD: yes
Link Debounce: no
Link Debounce Time: no
Port Security: yes
Dot1x: yes
Maximum MTU: 9198 bytes (Jumbo Frames)
Multiple Media Types: no
Diagnostic Monitoring: N/A
Enabling Multicast Storm Control
Per-interface multicast suppression, which allows you to subject incoming multicast and broadcast
traffic to interface-level suppression.
Note Multicast and broadcast suppression share a common threshold per interface. Multicast suppression
takes effect only if broadcast suppression is enabled. Disabling broadcast suppression on an interface
also disables multicast suppression.
To enable multicast suppression, perform this task:
Command or Action Purpose
Step 1
Switch# configure terminal
Enters global configuration mode.
Step 2
Switch(config)# interface interface-id
Enters interface configuration mode and specifies the port to be
configured.
Step 3
Switch(config-if)# storm-control
broadcast include multicast
Enables multicast suppression.
Step 4
Switch(config-if)# exit
Returns to configuration mode.