Re: Multiicast Troubleshooting

From: Rado Vasilev (decklandv@gmail.com)
Date: Thu Jan 01 2009 - 00:27:45 ARST

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> Hi,
>
> I am good in configuring Multicast but weak in it troubleshooting if
> devices
> are not giving required result. Anyone please tell me some commands
> and
> steps to identify cause of problem?

usually problems are related to failed RPF check.
>
>
> Tell me for troubleshooting, i enable "debug ip mrouting", "debug ip
> mpacket" but don't get any debug report when ping multicast group
> what would
> be reason ?

configure 'no ip mroute-cache' on the interfaces first.'

>
> Another thing when we ping a multicast group, will source ip be of
> loopback
> interface ?

all ifaces

regards,
rado

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