From: Salau, Yemi (yemi.salau@siemens.com)
Date: Tue Dec 11 2007 - 11:50:30 ART
Hello Scott/GS,
Yes IGMP is automatically enabled when PIM is, but the question Sridhar
asked is if it's required to enable PIM on interface that connects to
multicast receivers. Maybe I'm the one not getting it straight, but if
he's talking to a normal headend like STBs, or PCs or anyother multicast
client for that matter, I would say No.
Another insight into this: the normal setup of things is to connect up a
Layer 3 Switch to the Stub Router, and then you need to enable PIM on
the Router's fastethernet interface that connects to the VLAN Domain
where the multicast receivers belongs to. But if these receivers are
connected to the Stub Router Directly, I presume the Router will act as
the gateway out of the LAN domain. So, the PC needs not speak PIM to the
Router in this scenerio, but if it's the former scenerio, ofcourse, you
need to setup a PIM Path/Mroute all the way to the nearest PIM device
that connects to the multicast receivers, I'm not sure there is any RFC
recommendations to allow multicast devices speak PIM to the receivers.
NB: My definition of Receivers are Headends which actually receives the
Multicast Traffic. Yours might be different, so please clarify.
Many Thanks
Yemi Salau
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Morris
Sent: Tuesday, December 11, 2007 2:17 PM
To: 'Sridhar Vaidyanathan'; 'Cisco certification'
Subject: RE: Multicast on interface on which hosts is connected
Use "show ip igmp interfaces" to help you answer this.... PIM and IGMP
are
enabled at the same time. (short answer = yes)
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
JNCIE-M
#153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor
A Cisco Learning Partner - We Accept Learning Credits!
Telephone: +1.810.326.1444
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http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Sridhar Vaidyanathan
Sent: Tuesday, December 11, 2007 3:17 AM
To: Cisco certification
Subject: Multicast on interface on which hosts is connected
Dear All,
Is it required for enabling PIM on a fastethernet interface which is
connected to Multicast receivers? Assuming that the router is a Stub
Router
and has one serial connection through which the router receives
multicast
feeds and PIM is enabled on the serial interface.
Regards,
Sridhar.
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