Ericsson ECN330, User Manual

Page: 362 / 1226

Configuring the ECN330-switch
356
1553-KDU 137 365 Uen D 2006-06-16
• Act as IGMP Querier — When enabled, the ECN330-switch can serve
as the Querier, which is responsible for asking hosts if they want to
receive multicast traffic. (Default: Disabled)
• IGMP Query Count — Sets the maximum number of queries issued for
which there has been no response before the ECN330-switch takes
action to drop a client from the multicast group. (Range: 1-10, Default: 2)
• IGMP Query Interval — Sets the frequency at which the ECN330-
switch sends IGMP host-query messages. (Range: 60-125 seconds,
Default: 125)
• IGMP Report Delay — Sets the time between receiving an IGMP
Report for an IP multicast address on a port before the ECN330-switch
sends an IGMP Query out of that port and removes the entry from its
list. (Range: 1-225 tenths of a second, Default: 100)
• IGMP Query Timeout — The time the ECN330-switch waits after the
previous querier stops before it considers the router port (the interface
which had been receiving query packets) to have expired. (Range: 300-
500 seconds, Default: 300)
• IGMP Version — Sets the protocol version for compatibility with other
devices on the network. This is the IGMP Version the ECN330-switch
uses for snooping. (Range: 1-3; Default: 2)
Note: All systems on the subnet must support the same version.
Note: Some attributes are only enabled for IGMPv2 and v3 snooping,
including IGMP Report Delay and IGMP Query Timeout.
Note:
The current software can snoop on IGMPv3 packets, but cannot
generate a source/group (S,G) entry in service requests propagated to
upstream multicast routers. It only sends an all-sources/group (*,G) entry, the
same as done by IGMPv2. In other words, multicast traffic will be flooded to the
required ports according to the group address only, and not according to the
source IP address and group address as required by the IGMPv3 standard.