Network Issue - What to do now?
Having done a search and reading through various threads I was wondering if anyone could add anymore advice to help me track down my problem.
Around 10am today for no apparent reason our network decided to go down, by down I mean the following behavior;
-Clients unable to access network resources
-Clients unable to browse to internet
-Switches showing a lot of activity (mixture of entry level procurves and a few random unmanged)
-Unable to ping from one static machine to another
-Fibre convertors showing lots of activity
Now at first I thought this must be either a loopback or a virus as Ive seen both have similar affects on a network, Ive taken each server/host (we are virtualized on vmware) and rebooted, also taken all switches in building down. Thought it might our Ruckus wireless controller however this is now back up and appears ok.
We are back up and stable (ish) now...no idea why or how and Im in the process of troubleshooting further.
Sophos is showing no viruses
arp -a resolves as expected
I can now ping internal resources with no packet loss eg; server to workstation, workstation to server etc
I can traceroute to google.com successfully
What I am noticing is that pinging our default gateway (a LA Cisco 2950) I received constant time outs on, this is from any area of the network...would it be reasonable to assume this could cause the issue given nothing has to our knowledge changed on the network?
Ill be doing another walk around later today to ensure there are no visable loopbacks/damaged cabling etc any other advice or ideas much appreciated
Thanks for reading