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Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 17 Configuring IGMP Snooping and M V R Con f ig u ri n g IG M P F ilt e ri n g

Default IGMP Filtering Configuration

Table 17-7 shows the default IGMP filtering configuration.

Configuring IGMP Profiles

To configure an IGMP profile, use the ip igmp profile global configuration command with a profile
number t o cre ate an IG MP profile a nd to e nte r IGM P pr ofile co nfigurati on mod e. From thi s mo de, yo u
can specify the parameters of the IGMP profile to be used for filtering IGMP join requests from a port.
When you are in IGMP profile configuration mode, you can create the profile by using these commands:
•deny: Specifies that matching addresses are denied; this is the default condition.
•exit: Exits from igmp-profile configuration mode.
•no: Negates a command or sets its defaults.
•permit: Specifies that matching addresses are permitted.
•range: Specif ies a rang e of IP add res ses fo r the profile. You can en ter a sin gle IP addre ss or a ra nge
with a start and an end address.
The defaul t is for th e switch to have no IGMP p rofiles configured . When a profile is co nfigured , if
neither the permit nor deny keyword i s in cl ud ed , th e defaul t is t o deny ac cess to the r ang e o f I P
addresses.
Beginning in privileged EXEC mode, follow these steps to create an IGMP profile:
Table 17-7 Default IGMP Filtering Configuration
Feature Default Setting
IGMP filters None applied
IGMP Maximum number of IGMP groups No maximum set
IGMP pr ofiles None defined
IGMP pr ofile action Deny the range addr esses
Command Purpose
Step 1 configure terminal Enter globa l configurati on mode.
Step 2 ip igmp profile profile number Enter IGM P pr ofile configur ati on mo de , an d assi gn a n umb er to the
profile you are co nfiguring. Th e rang e is from 1 to 429 4967295 .
Step 3 permit | deny (Optional) Set the action to permit or deny access to the IP multicast
address. If no action is configured, the default for the profile is to deny
access.
Step 4 range ip multicast address Enter the IP multicast address or range of IP multicast addresses to
which access is being controlled. If entering a range, enter the low IP
multicast address, a space, and the high IP multicast address.
You can use the range command multiple times to enter multiple
addresses or r anges o f addresse s.
Step 5 end Return to privileged EXEC mode.