IPO dropping off network

[liquidshokk]

Have an issue with an IP500 V2 unit on 8.1 randomly dropping off the local LAN every few days. When it is down we can still get to the system via the ISDN lines and all appears to be well, however the IP phones onsite lose sight of the IPO and the SCN goes down.

before I start laying into the IT department to get them to look at switches onsite has anyone seen an IPO LAN port misbehaving in this way?

Thanks

 

[DaIPOTek]

Never seen it happen myself but NICs do go bad. Is the WAN port free? You could move to that one and see if the problem goes away.

 

[Pepp77]

Does ping still respond when it drops off?

| ACSS SME |

 

[amriddle01]

Seen address clashes do this

 

[liquidshokk]

I've left pings running to the address so we'll see next time it goes down.

Their IT partner assures me that the IPO address is out of the DHCP range........

 

[critchey]

Well it is possible it is out of the DHCP range but two devices are assigned the same address... or they are wrong and it is in the DHCP range. Neither would surprise me to be honest.

The truth is just an excuse for lack of imagination.

 

[DaIPOTek]

I think if it were an address clash then it would happen more frequently than every few days. Unless you find out that someone who comes into the office once a week is bringing their personal laptop in and statically assigned it to the IP address of the IPO.. Stranger things have happened.

As a test run a constant ping and reboot the IPO. If it reboots and you don't lose ping, you know the problem.

 

[liquidshokk]

Just to update, the IP handsets and link to remote office were down when I visited site and as soon as I move the LAN cable from one switch to another both the handsets and the link came straight up without having to reboot the system so looks like it was the netgear switch port that was faulty!

I swapped the system out anyway, so guess we'll never know for sure