TCP Keepalives failing over NAT
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you have
device1 –- cable --- switch --- cable --- device2That is my understanding, yes (I am remote troubleshooting with someone's help)
Have you changed the ports the devices are connected to on the switch?
Not yet, but I have asked the guy to attach a different Cisco switch to that switch, and have the server and client attached to the "new" switch - this should rule out the switch. Waiting to hear back from him.
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yup that would do it as well… Let us know what happens! Suggest use new cables as well when you connect to new switch.
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So after 1 week of having just the firewall and the server on the new switch, we see no transport related errors. So it is probably a very weird error inside that switch. We will be replacing it and see if that fixes the issue.
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Glad to hear you have found something.. So taking no cisco support on the switch so you could open a tac case with cisco? sg200 pretty cheap.. Prob just throw it out ;)
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No such luck I am afraid. The "new" switch is a SG200-26. Would love to understand what went wrong in that switch though. Almost like a messed up ARP table?
