HP 3500YL User Manual
Page 46
Multimedia Traffic Control with IP Multicast (IGMP)
How IGMP Operates
Table 2-1.Comparison of IGMP Operation With and Without IP Addressing
IGMP Function Available With IP Addressing
Configured on the VLAN
Available
Without IP
Addressing?
Operating Differences Without an IP Address
Forward multicast group traffic to any port on
the VLAN that has received a join request for
that multicast group.
Yes
None
Forward join requests (reports) to the Querier.
Yes
None
Configure individual ports in the VLAN to Auto
(the default)/Blocked, or Forward.
Yes
None
Configure IGMP traffic forwarding to normal or
high-priority forwarding.
Yes
None
Age-Out IGMP group addresses when the last
IGMP client on a port in the VLAN leaves the
group.
Support Fast-Leave IGMP and Forced Fast-
Leave IGMP (below).
Yes
Yes
Requires that another IGMP device in the VLAN has an IP
address and can operate as Querier. This can be a multi
cast router or another switch configured for IGMP oper
ation. (ProCurve recommends that the VLAN also include
a device operating as a backup Querier in case the device
operating as the primary Querier fails for any reason.
Support automatic Querier election.
No
Querier operation not available.
Operate as the Querier.
No
Querier operation not available.
Available as a backup Querier.
No
Querier operation not available.
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