From: Nick Griffin (ngriffin@sio.midco.net)
Date: Wed Apr 19 2006 - 12:36:23 GMT-3
I use it on mcast neighbors between the source and destination to see
the mcast packet input and output destinations. If you don't disable it
on interfaces along the path you won't see transit traffic in the debug
ip mpacket.
Schulz, Dave wrote:
> Hi Chris - Just curious about the no ip mroute .... how does insuring the
> multicast traffic being fast-switched help find the issue?
>
> Dave
>
> ________________________________
>
> From: nobody@groupstudy.com on behalf of Chris Lewis
> Sent: Wed 4/19/2006 9:58 AM
> To: Vikram Dadlaney
> Cc: ccielab@groupstudy.com; ccie.xpert@gmail.com
> Subject: Re: Multicast problems
>
>
>
> Forget that, you've probably got dynamic mappings. I'd check to make sure
> all your PIM neighbors are setup first and simplify your config to the bare
> minimum and look at the output of debug ip mpack. You will probbaly want to
> configure no ip mroute-cache on all PIM interfaces also.
>
> Chris
>
>
> On 4/19/06, Chris Lewis <chrlewiscsco@gmail.com> wrote:
>
>> It looks like you are using the physical interfaces for teh frame relay
>> connection between BB1 and R6. If so, I would have expected to see frame
>> relay map statements in those interfaces.
>>
>> You won't get multicast connectivity until unicast is working!
>>
>> Chris
>>
>>
>> On 4/19/06, Vikram Dadlaney <vdadlaney@gmail.com> wrote:
>>
>>> Hi Shameen,
>>>
>>> From your topology it doesn't seem like you have any alternate paths.
>>> Can
>>> you confirm this? Your OIL list on R6 is empty hence you are not
>>> forwarding
>>> the multicast traffic. Can you post the the configs of R2. Also have you
>>> tried clearing all your neighbors. The 'ip mroute' influences the RPF
>>> check.
>>> If you have multicast enabled on all interfaces than it should not
>>> matter
>>> but say you have an alternate path and you haven't enabled multicast on
>>> that
>>> but the unicast routing table is choosing that path than you will have a
>>> RPF
>>> failure. Please do let us know if the problem has been resolved. HTH.
>>>
>>> Regards,
>>>
>>> Vikram
>>>
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