Intermittent conection issues

[Dashsa]

Hello,
At work we have 3 physical locations each office has a server and we use Sonic wall TZ170's to create VPN tunnels between the offices. Office2 has a intermittent connection to the main office and when people are trying to get files from the main server in Office 1 the connection fails. the connection goes down about 4 times a day!

Does anyone know of any cheap/free tools that will help monitor the network and assit with diaginosing the issue?

thanks

 

[segment]

Pick up a copy of Netdoppler (

http://www.wildpackets.com/support/other_products/free_utilities/netdoppler)

and diagnose from there. You should also pick up Wireshark to get a better view on a capture. You should be able to pick up potential VPN key mismatches.

perl -e 'print $i=pack(c5,(40*2),sqrt(7600),(unpack(c,Q)-3+1+3+3-7),oct(104),10,oct(101));'

 

[marias0]

Do they go down at the same times every day? Perhaps you can do some testing with traceroute and see if heavier traffic is an issue.

Best,
Maria Santella
Technical Sales Engineer
ICP DAS USA, Inc.

http://www.icpdas-usa.com

 

[burtsbees]

I would also look at the configs of the sonicwalls---like timeouts, key lifetimes, etc. What type of VPN? IPSEC? L2TP? It may also be beneficial to post in the vpn forum here...

Burt

 

[pansophic]

I'd recommend that you download a VMWare appliance with MRTG configured and start monitoring the network bandwidth in near real time.

It could be as simple as the VPNs are re-keying periodically and it is taking them an excessive amount of time to perform the re-key (usually due to packet errors). The tunnels would drop for a short period of time and then automatically resync.


pansophic

 

[technome]

Are all endpoints on a UPS, Sonicwalls (like many others) have small power supply capacitors susceptible to power anomalies.


........................................
Chernobyl disaster..a must see pictorial

http://www.kiddofspeed.com/default.htm