RE: multicast ping

From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Fri Jul 07 2006 - 18:58:42 ART


Tim,

        When you do a standard ping it goes out all local interfaces.
Also if the packet transits a multipoint NBMA interface that has
multiple "broadcast" mappings to the same virtual circuit the packet
will also be replicated at layer 2 multiple times on that interface.
Try doing an extended ping and choosing the source IP address and the
outgoing interface for the feed; this is more indicative of a true
multicast feed.

HTH,

Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com

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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Tim Chan
> Sent: Friday, July 07, 2006 4:53 PM
> To: ccielab@groupstudy.com
> Subject: multicast ping
>
> Why is it when you ping a multicast address, the number of replies
varies?
> I've seen anywhere from 2 - 4 replies.
>
> thanks,
> -tim
>
>
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This archive was generated by hypermail 2.1.4 : Tue Aug 01 2006 - 07:13:47 ART