From: Hobbs (deadheadblues@gmail.com)
Date: Sat Feb 14 2009 - 06:05:46 ARST
I have labbed this a few times. I made a post here just a couple days ago too:
http://ccietobe.blogspot.com/2009/02/multicast-ttl-threshold.html
Let me know what you think. I used high TTLs in my example but you
should get the idea.
Referring to Ruhann's task, according to the DocCD it would 12, but
according to lab results it should be 13.
On Fri, Feb 13, 2009 at 11:44 PM, ALL From_NJ <all.from.nj@gmail.com> wrote:
> Can someone lab this up? I can tomorrow if no one else can. My thoughts on
> an easy test:
>
> Use dense mode
> R1 has igmp static groups for a far side interface
> R2 has ttl threshold command with links to R1 and R3
> R3 sends mcast ping. On R3, configure the ttl of the ping to increase with
> each test.
> Test ping first before moving on.
>
> Set the ttl threshnold on R2's link to R1. Increase the configured value
> with each ping.
>
> The ttl threshold is looking at the outgoing packets ... what is the ttl of
> the outgoing packet? By the time the packet is an 'outgoing' packet, the
> ttl has already been reduced by one ... would be best to lab this though to
> see the command in action. I can tomorrow if no one else has this
> available.
>
> Also, if my quick test above is 'lame' ... please specify a better test and
> I can try whatever you think is good tomorrow.
>
> From the docs:
>
> Usage Guidelines:
> Only multicast packets with a TTL value greater than the threshold are
> forwarded out the interface.
>
> HTH,
>
> TGIF. Have a good night team,
>
> Andrew Lee Lissitz
>
>
>
>
>
>
> On Sat, Feb 14, 2009 at 1:15 AM, BALA <balavignesh002@gmail.com> wrote:
>>
>> I agree with Hobbs.
>>
>> The question is any thing lesser than 13 (13 should be permitted i guess)
>> which mean from 12 to 1
>>
>> so the answer is 12.
>>
>> --
>> Thanks & Regards
>>
>> Balavignesh R
>>
>>
>
>
>
> --
> Andrew Lee Lissitz
> all.from.nj@gmail.com
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