[THIN] Re: Retransmits
- From: "Schneider, Chad M." <CMSchneider@xxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Wed, 2 Jul 2003 17:01:53 -0500
My boss is running Observer program, looking for retransmits. And while we
see some from other servers, we see A LOT from the Citrix servers. Back to
back. Excessive retries.
_____
From: John Knightly [mailto:jknightly@xxxxxxxxxxxxxxxxxx]
Sent: Wednesday, July 02, 2003 4:58 PM
To: thin@xxxxxxxxxxxxx
are you sniffing traffic?
-----Original Message-----
From: Schneider, Chad M. [mailto:CMSchneider@xxxxxxxxx]
Sent: Wednesday, July 02, 2003 2:40 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Retransmits
No VPN, direct connections to remote sites.
_____
From: John Knightly [mailto:jknightly@xxxxxxxxxxxxxxxxxx]
Sent: Wednesday, July 02, 2003 4:22 PM
To: thin@xxxxxxxxxxxxx
Looks like a good one...is there a VPN involved? IPSEC overhead will frag
ICA packets to hell and back, causing dropped packets. Lowering the MTU is
the only fix i'm aware of (or get rid of the VPN tunell).
John
-----Original Message-----
From: Henry Sieff [mailto:hsieff@xxxxxxxxxxxx]
Sent: Wednesday, July 02, 2003 2:12 PM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: Retransmits
Things I would look into:
1) If you have alot of WAN clients, your router could be dropping packets.
This can happen for alot of reasons, but its a vicious cycle. Router drops
packets, servers retransmit which increases load, which causes router to
drop packets.
2) Mismatched duplex settings can cause this, on occasion.
How are you seeing the retransmissions? (IE are you sniffing, and if so,
where are you sniffing the traffic from in relation to the server?
-----Original Message-----
From: Schneider, Chad M. [mailto:CMSchneider@xxxxxxxxx]
Sent: Wednesday, July 02, 2003 3:56 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Retransmits
Importance: High
Any seen a situation where Citrix causes a TON of retransmits? I am seeing
nearly ever packet being retransmitted. We are now seeing slower links
being unable to handle the load.
Chad Schneider
Technology Analyst
Bemis IT
920-303-7609
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