Re: ping a multicast address specifying source interface

On Oct 23, 2012, at 1:40 PM, Mohammad Mousa wrote:

> First, sometimes the multicast doesn't work well even if you configure it correctly so try to use real gear. Only the extended ping can sourced the traffic from the interface you want. I mean if you try to use ping x.x.x.x so lo0, not all the packet will be sourced from the loopback0, use debug ip icmp where is your client and see!!
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> check the command reference for this command "ip pim accept-register" there are a lot of information that maybe helpful for you
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> http://www.cisco.com/en/US/docs/ios-xml/ios/ipmulti/command/imc_i3.html#GUID-A3887644-DD8D-4621-B6F2-911191337439
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> Mohammad Mousa
> CCIE #36990
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> On Oct 23, 2012, at 12:20 PM, ccie99999 wrote:
>
>> Hi guys,
>>
>> is it just me and my gns3 or ping to a multicast address specifying the
>> source interface does not work very well?
>>
>> I've a lab where I filter sources using "ip pim accept-register list"
>>
>> my expectation are that I can filter all sources in the access-list
>> specified in the command above.. and this works. (in the access-list
>> loopback addresses are permitted)
>>
>> I would also expect that if I do ping 224.x.x.x source loo 0 this would
>> work.. but it doesn't.
>>
>> I'm using ip pim sparse-dense mode and I've specified the rp-address.
>>
>> the ip pim sparse-mode is configured also on the loopback interfaces.
>>
>> on the rp I get these messages even when I ping from loopbacks:
>>
>> %PIM-4-INVALID_SRC_REG: Received Register from y.y.y.y for (x.x.x.x,
>> 224.x.x.x), not willing to be RP
>>
>> where am I wrong?
>>
>> thanks
>>
>> --
>> @ccie99999
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
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Received on Tue Oct 23 2012 - 13:41:52 ART