Hello
If the whole network went down most probably due to a network loop, and your having issues accesing any devices, I would recommend start at the core layer switch work away from it.
The core will most probably have all the interconnects to your distribution or access layers switches.
Apply a continuous ping to a few known devices on the network and then, independently close off and re-enable each interconnect from the core whilst monitoring the pings, at some point the pings will again become stable, and its then you can slowly narrow down the root device on a certain switch causing the loop?
This has been very successful for me when faced with this kind of issue and can honestly say its a very useful way of TS a network unfamiliar to yourself.
Personally I wouldn't recommend reloading any device whilst you are doing this, As it can just mask the root cause of the problem and sometimes create the same issue elsewhere within the estate.
Collecting logs and monitoring is all good if you have the time to do it, But my past experiences have taught me that management aren't interested in you collecting data , The want their network up ASAP, The analysing and post mortem can be done later.
res
Paul
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Kind Regards
Paul
