EasyManuals Logo

Cisco 3750G - Catalyst Integrated Wireless LAN Controller User Manual

Cisco 3750G - Catalyst Integrated Wireless LAN Controller
1204 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #558 background imageLoading...
Page #558 background image
24-14
Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 24 Configuring IGMP Snooping and MVR
Configuring IGMP Snooping
Beginning in privileged EXEC mode, follow these steps to enable the switch to send the global leave
message whether or not it is the spanning-tree root:
To return to the default query solicitation, use the no ip igmp snooping tcn query solicit global
configuration command.
Disabling Multicast Flooding During a TCN Event
When the switch receives a TCN, multicast traffic is flooded to all the ports until 2 general queries are
received. If the switch has many ports with attached hosts that are subscribed to different multicast
groups, this flooding might exceed the capacity of the link and cause packet loss. You can use the ip
igmp snooping tcn flood interface configuration command to control this behavior.
Beginning in privileged EXEC mode, follow these steps to disable multicast flooding on an interface:
To re-enable multicast flooding on an interface, use the ip igmp snooping tcn flood interface
configuration command.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ip igmp snooping tcn query solicit Send an IGMP leave message (global leave) to speed the process of
recovering from the flood mode caused during a TCN event. By
default, query solicitation is disabled.
Step 3
end Return to privileged EXEC mode.
Step 4
show ip igmp snooping Verify the TCN settings.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the interface to be configured, and enter interface
configuration mode.
Step 3
no ip igmp snooping tcn flood Disable the flooding of multicast traffic during a spanning-tree TCN
event.
By default, multicast flooding is enabled on an interface.
Step 4
exit Return to privileged EXEC mode.
Step 5
show ip igmp snooping Verify the TCN settings.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Cisco 3750G - Catalyst Integrated Wireless LAN Controller and is the answer not in the manual?

Cisco 3750G - Catalyst Integrated Wireless LAN Controller Specifications

General IconGeneral
Switching Capacity32 Gbps
RAM128 MB
Flash Memory32 MB
Power DeviceInternal power supply
Ports48 x 10/100/1000 + 4 x SFP
Performance38.7 Mpps
Wireless LAN Controller Capacity50
StackingYes
FeaturesVLAN support, QoS
Compliant StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3z
Operating Humidity10% to 85% non-condensing
Power over Ethernet (PoE)Yes (optional)

Related product manuals