16 messages in edu.merit.nanogRe: impossible circuit
FromSent OnAttachments
Jon LewisAug 10, 2008 8:15 pm 
George CareyAug 10, 2008 10:24 pm 
Laurence F. Sheldon, Jr.Aug 11, 2008 6:27 am 
Justin ShoreAug 11, 2008 1:16 pm 
Jay R. AshworthAug 11, 2008 1:22 pm 
list...@pwns.msAug 12, 2008 4:36 am 
Jon LewisAug 12, 2008 7:37 am 
Andy JohnsonAug 13, 2008 7:41 am 
Justin ShoreAug 13, 2008 9:02 am 
Jon LewisAug 13, 2008 9:29 am 
Andy JohnsonAug 13, 2008 11:27 am 
Jared MauchAug 13, 2008 11:33 am 
Jon LewisAug 16, 2008 11:07 pm 
list...@pwns.msAug 16, 2008 11:36 pm 
Jay HenniganAug 16, 2008 11:56 pm 
Paul WallAug 18, 2008 1:46 pm 
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Subject:Re: impossible circuitActions...
From:Jared Mauch (jar@puck.nether.net)
Date:Aug 13, 2008 11:33:43 am
List:edu.merit.nanog

On Wed, Aug 13, 2008 at 02:27:33PM -0400, Andy Johnson wrote:

working, and keeps the dupes from coming back at us, because the ppp encapsulated packets aren't understood by Sprint's routers running [I assume] hdlc...so they can't forward the packets.

AFAIK, routers don't just forward IP packets because they "see" them. That destination MAC address needs to be set to something assigned to the router doesn't it? Unless somehow they've crossed you into some sprint router running IRB? That might be the only exception I can think of.

The circuit involved in this case is a DS3, whatever you get will be processed on the other side unless it's blocked by uRPF or some sort of ACL.

- Jared

-- Jared Mauch | pgp key available via finger from jar@puck.nether.net clue++; | http://puck.nether.net/~jared/ My statements are only mine.