Multicast is not compatible with IPSec (unless you encapsulate it in
GRE before encrypting) - so no - you will not be able to stream it
directly to your CIPC.
HOWEVER - you CAN test it AND hear it - just in a different way:
1. (Your IP Blue client as the) PSTN Phone calls into BR1 GW - and
over to a BR1 Phone (also another IP Blue client on your PC)
2. BR1 Phone puts the PSTN Phone on hold - which is essentially
streaming Multicast MoH over to the BR1 GW - where it then goes out
POTS PRI over to PSTN GW PRI - then the PSTN GW streams Unicast a RTP
stream out to your IP Blue PSTN PC client phone
So you see it is no longer multicast because that stream terminated at
BR1 GW - however IF you are actually hearing anything - then you have
configured it properly because it must be multicast up to the BR1 GW.
Also bear this in mind: Because in our classes we do test Multicast
MoH - we have Multicast Routing turned on - on the routers in between
pods - and therefore you SHOULD change your "Base Multicast IP
Address" on your Pub/Sub MoH Servers to a scheme like this:
239.x.y.1 --> Where X = your Pod number and Y = your Pub/Sub (they
can't share IPmc group numbers).
Otherwise if you use the default group of 239.1.1.1 - you may very
well hear multicast music on hold - but it may not be that your server
is set up correctly - it could very well be coming from your
neighbor's pod ;-)
Cheers,
Mark Snow
CCIE #14073 (Voice, Security)
CCSI #31583
Senior Technical Instructor - IPexpert, Inc.
A Cisco Learning Partner - We Accept Learning Credits!
Telephone: +1.810.326.1444
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On Feb 10, 2008, at 1:04 PM, Chad Stachowicz wrote:
guys,
can we get mutlitcast MOH to out ipcommunicator? I see multicast
incrementing on interfaces to BR1 with sh ip multicast interface
<int> but can't hear it
Thanks,
Chad
