I was hoping someone might have an idea why one of my 5548UP switch stops responding to SSH attempts after a period of time. This is the second time it occurred. The first time I tried to regenerate the SSH RSA key. While the attempt failed it started working again. There is no response from the switch at all. You don't get the "connection refused" in fact you get nothing it just sits there. Other then that the switch is working perfectly fine. I tried to "clear line" but there are none to clear. My original thought was there were to many open connections from other users or devices. However I don't see that reflected when I console in and look. I am stumped.
This is a NX-OS issue and is corrected in a new version of the OS. Basically the network monitoring tool we use is openening a connection to the device and they are not clearing out like they should. After a while all the connections are still open and the feature SSH would need to be turned off and back on again to clear the issue.
This document will provide screenshots to outline the steps to setup
TACACS+ configuration to ACI and also the configuration required on
Cisco ACS server. Please find the official Cisco guide for configuring
TACACS+ Authentication to ACI:
Is it supported or NOT supported? It's a frequently asked question.
Before APIC, release 2.3(1f), transit routing was not supported within a
single L3Out profile. In APIC, release 2.3(1f) and later, you can
configure transit routing with a single L3Out pr...
Cisco Documents are usually accurate, but when it came to the document
on Cisco APIC Signature-Based Transactions it was slightly off the mark.
This document is for those novices to API like me who cant seem to
figure out how to go about performing signat...