I've just spent a bit of time getting multicast imaging to work on our
HP ProCurve switched network so I thought I'd post what was necessary
so if anyone else had to look for it then they'd have some help.

You'll need a switch capable of routing such as a 5300 series that is
already routing regualr IP traffic. By default IGMP routing is disabled
so that multicast traffic will not cross VLANs. Here's how to change
that:

Log into the 5300 in Manager mode (aka Admin)
type "config" /goes into config mode
type "ip multicast routing" /sets up IGMP routing
type "router pim" /sets up Protocol Independant Multicast routing
type "vlan *" /where * is a VLAN numeric ID
type "ip igmp" /sets up IGMP routing on that VLAN
type "ip pim" /sets up PIM routing on that VLAN
Repeat those last three steps for all necessary VLANs
type "exit" /to get back out of config mode - you may have to do
that more than once
type "wri mem" to save the config changes

Then go out to any other switches in the network path for multicasts
and login in Manager mode

type "config"
type "vlan *" /where * is VLAN numeric ID
type "ip igmp" /turns on IGMP routing
Repeat those last two steps for all VLANs that need it
type "exit" /to get back out of config mode - you may have to do
that more than once
type "wri mem" to save the config changes

That's it and it meant I went from "Session Master not found" to "New
Image successful". I hope it helps somebody.

Andrew
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