From: Pavel Bykov (slidersv@gmail.com)
Date: Wed Dec 10 2008 - 13:00:15 ARST
It is some sort of a feature of most of IOS releases, that multicast ping
packets are sent from ALL interfaces that have "ip pim" enabled. (ofcourse
only on the router where you issue ping command)
On Wed, Dec 10, 2008 at 1:59 PM, L. Jankok <ljankok@gmail.com> wrote:
> RSRack1R6 is configured with two subinterfaces, f0/0.6 is stub and f0/0.26
> is connected to the rest of the network.
>
> A neighbor is found through f0/0.26
> Address
> Prio/Mode
> 132.1.26.2 FastEthernet0/0.26 02:42:43/00:01:36 v2 1 / S
>
> pinging the group 228.28.28.28 from this neighbor, RSRack1R2, is
> successfull
>
> RSRack1R2#ping 228.28.28.28
>
> Reply to request 0 from 132.1.17.7, 100 ms
>
> pinging the same group sourced from subinterface f0/0.06 or f0/.26, from R6
> fails
> each time displaying a message stating that the other sub interface is
> "not RPF interface"
>
> RSRack1R6#ping 228.28.28.28 source f0/0.6
>
> Packet sent with a source address of 132.1.6.6
>
> *Oct 24 13:18:22.065: IP(0): s=132.1.6.6 (FastEthernet0/0.6)
> d=228.28.28.28id=159, ttl=254, prot=1, len=114(100), mroute olist null
> *Oct 24 13:18:22.069: IP(0): s=132.1.6.6 (FastEthernet0/0.26)
> d=228.28.28.28id=159, ttl=254, prot=1, len=114(100), not RPF
> interface.
>
> RSRack1R6#ping 228.28.28.28 source f0/0.26
>
> Packet sent with a source address of 132.1.26.6
>
> *Oct 24 13:35:53.641: IP(0): s=132.1.26.6 (FastEthernet0/0.6)
> d=228.28.28.28id=161, ttl=254, prot=1, len=114(100), not RPF interface
> *Oct 24 13:35:53.645: IP(0): s=132.1.26.6 (FastEthernet0/0.26) d=
> 228.28.28.28 id=161, ttl=254, prot=1, len=114(100), mroute olist null.
>
> your help is appreciated
>
>
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-- Pavel Bykov ---------------- Don't forget to help stopping the braindumps, use of which reduces value of your certifications. Sign the petition at http://www.stopbraindumps.com/Blogs and organic groups at http://www.ccie.net
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