Default Igmp Snooping Configuration; Enabling Or Disabling Igmp Snooping - Cisco Catalyst 2950 Software Configuration Manual
Hide thumbs
Also See for Catalyst 2950:
- Configuration manual (710 pages) ,
- Command reference manual (686 pages) ,
- Software configuration manual (544 pages)
Table of Contents
Advertisement
Configuring IGMP Snooping
•
•
•
•
Default IGMP Snooping Configuration
Table 20-3
Table 20-3
Feature
IGMP snooping
Multicast routers
Multicast router learning (snooping) method
IGMP snooping Immediate Leave
Static groups
IP multicast-source-only learning
PIM v2 multicast router discovery
Aging forward-table entries (when source-only
learning is enabled)
IGMP report suppression
Enabling or Disabling IGMP Snooping
By default, IGMP snooping is globally enabled on the switch. When globally enabled or disabled, it is
also enabled or disabled in all existing VLAN interfaces. IGMP snooping is by default enabled on all
VLANs, but can be enabled and disabled on a per-VLAN basis.
Global IGMP snooping overrides the VLAN IGMP snooping. If global snooping is disabled, you cannot
enable VLAN snooping. If global snooping is enabled, you can enable or disable VLAN snooping.
Beginning in privileged EXEC mode, follow these steps to globally enable IGMP snooping on the
switch:
Command
Step 1
configure terminal
Step 2
ip igmp snooping
Step 3
end
Step 4
copy running-config startup-config
To globally disable IGMP snooping on all VLAN interfaces, use the no ip igmp snooping global
configuration command.
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
20-8
Disabling IGMP Report Suppression, page 20-12
Disabling IP Multicast-Source-Only Learning, page 20-13
Configuring the Aging Time, page 20-14
Configuring the IGMP Snooping Querier, page 20-14
shows the default IGMP snooping configuration.
Default IGMP Snooping Configuration
Purpose
Enter global configuration mode.
Globally enable IGMP snooping in all existing VLAN interfaces.
Return to privileged EXEC mode.
(Optional) Save your entries in the configuration file.
Chapter 20
Configuring IGMP Snooping and MVR
Default Setting
Enabled globally and per VLAN.
None configured.
PIM-DVMRP.
Disabled.
None configured.
Enabled.
Enabled
Enabled. The default is 600 seconds
(10 minutes).
Enabled.
78-11380-12
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
