HP 3500YL - Manual (Page 54)

Multimedia Traffic Control with IP Multicast (IGMP)
How IGMP Operates
The example below shows the lower and upper boundaries of the multicast
address range associated with the domain named Bob.
ProCurve(config)# igmp-proxy-domain Bob 111.11.111.111 234.0.0.1
ProCurve(config)# igmp-proxy-domain Bob 111.11.111.111 236.1.1.1
Figure 2-6. Setting the Lower and Upper Bounds for Multicasting
VLAN Context Command
The following command is performed when in VLAN context mode. When a
query occurs on the upstream interface, an IGMP join will be sent for all
multicast addresses that are currently joined on the downstream interface.
Syntax: [no] igmp-proxy <domain-name>
Tells the VLAN which IGMP proxy domains to use with joins
on the VLAN. The
no version of the command with no domain
name specified removes all domains associated with this
VLAN.
Note: Multiple different domains may be configured in the same VLAN
context where the VLAN is considered the downstream interface. The
domain name must exist prior to using this command to add the domain.
N o t e If the unicast routing path to the specified IP address was through the VLAN
specified, then no proxy IGMP would occur, that is, a proxy is not sent back
out on the VLAN that the IGMP join came in on.
If no unicast route exists to the border router, then no proxy IGMP packets
will be sent.
2-22