04-12-2011 02:59 PM
I have run into an odd situation where the ACE sends a TCP reset for the public leg of a TCP session prematurely. The setup looks something like this.
Internet-->FWSM(context)-->ACE-->rservers
client upload NAT exemption routed
For VIP
<--RST
The client reports that this seems to happen most frequently on slow connection with a fair amount of packet loss. I cannot make any such claim but it is their theory. A capture from the ACE doesn't reveal anything obvious. The ACE sends ACK with Seq-1 Ack- 51777 Win29852 at timestamp 0.641248. It then follows with a RST with Seq -1 Ack - 51777 Win29852 at timestamp 0.641405 with no apparent reason why. The last packet sent by the rserver prior to this termination had Seq - 1 Ack - 51778 Win 63480 with a timestamp of 0.615157.
I don't really have much else to go on right now. I'm still digging through show commands and show-tech in the hopes that I find something. Does anyone out there have any thoughts?
Thanks,
Dave
04-13-2011 04:18 AM
Hi David,
For these kind of issues, the best approach would be opening a TAC case to have it investigated further.
The traffic capture you got and a showtech from the ACE would be a good start, but even better if you could get a capture showing both the client and server sides of the connection and a showtech before and after the test.
Daniel
04-14-2011 04:58 AM
I got the same problem...
Did you manage to handle it ?
Best Regards
04-15-2011 02:09 PM
I will be happy to post an update when I get one. I have had a TAC case open with Cisco for 2 days and the only communication I have received is the notification email that the case was assigned. I'm trying to get it reassigned today so that I can move forward come Monday. We will see......
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