[c-nsp] tcp retransmissions

[Church, Chuck]

Is path MTU enabled on the tunnel interfaces?  Beyond that, are the
routers behaving normally - CPU, interfaces, logs, etc? 


Chuck Church
Lead Design Engineer
CCIE #8776, MCNE, MCSE
Netco Government Services - Design & Implementation Team
1210 N. Parker Rd.
Greenville, SC 29609
Home office: 864-335-9473
Cell: 864-266-3978
cchurch at netcogov.com
PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D 


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Kern, Tom
Sent: Tuesday, October 11, 2005 2:03 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] tcp retransmissions

I'm running an Exchange 2k bridgehead server which is journalling all my
org's mail(about 100,000 emails a day) through a GRE tunnel between 2
2600 cisco routers over T1 to my ISP and thru the internet.
 
the other side of the connection is saying they only get about 4-5
journaled emails a day.
when i run ethereal on the exchange bridgehead, i see a ton of tcp
retransmissions to the journal server.
 
is this due to the GRE tunnel and if so, what can i do about it?
change the MTU orMSS,etc?
 
Thanks alot

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