ASA 5500 block all DMZ after running a while

[dtsadminsys]

Our ASA 5500 K8 had been configured like this :

1 - One outside Port

2- 4 DMZ port

After running a few days, all DMZ networks are unrecheable, without any error is asdm logs (set debug)

Can you help to resolve this issue ?

Regards,

Emmanuel

[eddie.mitchell]

During the times when the DMZ networks are unreachable, can you successfully ping DMZ hosts from the ASA firewall?

Could it be an interface speed/duplex issue between the ASA and the DMZ switches? Are the interfaces set to auto-negotiate or are they hard set?

What about a potential issue with the license?

Hope this helps.