Igmp Version 3 - SMC Networks 7824M/VSW - annexe 1 Manual

Management Guide
TigerAccess™ EE
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9.1.3
SMC7824M/VSW
To display the IGMP static join group list, use the following command.
Command
show ip igmp static-group
show ip igmp static-group list
{<1-99> | <1300-1999> | WORD}
[ vlan VLAN ]
If you do not specify the reporter option, the IP address configured on the VLAN is used
as the source address of the membership report by default. If no IP address is configured
on the VLAN, 0.0.0.0 is then used.
This feature only supports an IGMPv2 host; it does not support IGMPv3 host.

IGMP Version 3

IGMP version 3 provides support for the source filtering, which is to receive multicast traf-
fic for a group from specific source addresses, or from except specific source addresses,
allowing the Source-Specific Multicast (SSM) model.
The source filtering is implemented by the major revision of the membership report.
IGMPv3 membership reports contain two types of the record: current-state and state-
change. Each record specifies the information of the filter mode and source list. The re-
port can contain multiple group records, allowing reporting of full current state using fewer
packets.
The switch runs IGMPv3 by default, and there are no additional IGMPv3 parameters you
need to configure. IGMPv3 snooping features are provided.
IGMPv3 Messages
There are two types of IGMPv3 messages of concern to the host-router interaction as
shown below:
Membership query
•
A multicast router determines if any hosts are listening to a group by sending mem-
bership queries. There are three variants of the membership queries.
– General query: This is used to determine if any hosts are listening to any group.
– Group-specific query: This is used to determine if any hosts are listening to a par-
ticular group.
– Group-source-specific query: This is used to determine if any hosts are listening
to a particular group and source.
Version 3 membership report
•
This is used by hosts to report the current multicast reception state, or changes in the
multicast reception state, of their interfaces. IGMPv3 membership reports contain a
group record that is a block of fields containing information of the host's membership
in a single multicast group on the interface from which the report is sent. A single re-
port may also contain multiple group records. Each group record has one of the fol-
lowing information:
Mode
Shows the IGMP static join group list.
Enable
1-99: IP standard access list
Global 1300-1999: IP standard access list (expanded)
Bridge WORD: access list name
VLANS: VLAN ID (1-4094)
Description
CLI
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