Configuring the ECN330-switch
368 1553-KDU 137 365 Uen D 2006-06-16
6.16.3.2 Displaying Multicast Group Information
When IGMP (Layer 3) is enabled on the ECN330-switch the current multicast
groups learned through IGMP can be displayed in the IP/IGMP/Group
Information page. When IGMP (Layer 3) is disabled and IGMP (Layer 2) is
enabled, the active multicast groups can be viewed in the IGMP Snooping/IP
Multicast Registration Table (see page 360).
Command Usage
To display information about multicast groups, IGMP must first be enabled on the
interface to which a group has been assigned (see “Configuring IGMP Interface
Parameters” on page 364), and multicast routing must be enabled globally on
the system (see “Configuring Global Settings for Multicast Routing” on
page 469).
Command Attributes
• Group Address – IP multicast group address with subscribers directly
attached or downstream from the ECN330-switch.
• Interface – The interface on the ECN330-switch that has received traffic
directed to the multicast group address.
• Last Reporter – The IP address of the source of the last membership
report received for this multicast group address on this interface. If no
membership report has been received, this object has the value 0.0.0.0.
• Up time – The time elapsed since this entry was created.
• Expire – The time remaining before this entry will be aged out.
(Default: 260 seconds)
• V1 Timer – The time remaining until the ECN330-switch assumes that
there are no longer any IGMP Version 1 members on the IP subnet
attached to this interface. (Default: 400 seconds)
• If the ECN330-switch receives an IGMP Version 1 Membership
Report, it sets a timer to note that there are Version 1 hosts present
which are members of the group for which it heard the report.
• If there are Version 1 hosts present for a particular group, the
ECN330-switch will ignore any Leave Group messages that it
receives for that group.
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