Duplicate IP causing loopback-like conditions?
Silly question from someone that really should know.
Flat network. Nothing special involved. All devices in one (brand new) switch. Did it on the old one as well.
Conditions are like a loopback - i.e. pinging from any machine to any other is showing replies between 1ms and 1s, if at all.
The only thing I can think of that might be causing this, is that the school has a fair few tablets/phones that are connected which have been given static IP addresses by site-staff (with little advice from me) in part of the IP scope which allows a lower level of internet filtering.
I'm gonna run wireshark on it the next time I'm there, but for the time being we've just written off the wireless (hodge-podge APs) to try and get an idea of what's going on. Last time it happened we thought it was a dodgy AP so pulled it out and it was fixed. If it's a wireless client then that's obviously more likely to be a cause, obviously fixed when the AP is no longer there. Just trying to think of the most logical starting point!