Any ideas? Avaya vpn phone 5610 restarts every 6 hours

[chipark]

I am working with a remote office that has 4 Avaya vpn phones, 5610. For some reason the phones will reset every 6 hours and 25 minutes or so. They were on Qwest DSL, now they are on fiber through an ISP that resells Qwest service. 5Mb up and 5 Mb down.

Identical phones configured in other offices do not have this issue connecting to the same Cisco ASA 5520.

I am not sure if it is the VPN (although I think this unlikely because other VPN phones keep their tunnels up for days at a time) or if it is something ISP specific. I ruled out router/firewall issues because I had the same problem with a Motorola Netopia and now a Sonicwall TZ100.

Anyone run into a similar issue?

Thanks.

 

[chipark]

Sorry, put this in wrong forum, it's for an IP office 500, any way to move this?

 

[Gibsonic]

you might want to find out what the ISP address lease time is. sounds like a link or local data equipment issue.

 

[JayNEC]

Increase the rekey timers. The 5600's tend to do that when the timers expire and have to redo the key exchanges.

 

[chipark]

Thanks, I'll check out both suggested items.