If you are seeing CRC's then the router will have dropped the packet.
If UDP was lost, then it is lost forever and it is up to the application
how to deal with this.
If a TCP packet was lost, then it is up to the end station that
transmitted the packet to retransmit the packet based on the
acknowledgment responses from the receiving end. The routers will never
retransmit transit packets (that is packets passing through the router
that were not locally generated by the router). It will only ever
retransmit if it is one of the ends in the TCP session.
David
-----Original Message-----
From: Tatsuya Kawasaki [mailto:tatsuya@kivex.com]
Sent: Wednesday, April 18, 2001 12:06 PM
To: cisco-nsp@puck.nether.net
Subject: [nsp] a question CRC error and resent
Hi you all,
I have a simple question for you.
connected to serial to serial via T1.
If you are seeing CRC errors on the one router but not
another.
if you see CRC on the one site, does TCP request resent
request? how do I know without debugging TCP packet?
Does cisco has a way to checking such request?
the second thing is who "should" be responding this request?
I thought ONLY the router in the other end is the one should respond
assuming there is no other equipments other than usual teleco gears
btwn.
TIA,
Tatsuya
/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Tatsuya Kawasaki
Allegiance Telecom
Unlock the Power of the Internet
http://www.kivex.com
Phone 301.215.6777 Fax 301.215.5991
Affiliation given for identification not representation
/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:35 EDT