I too am experiencing the same exact issue. I have had an open support ticket with Cisco for months now. So far, they have not found any resolution and don’t appear to see this as a major problem with the ASA’s. I am actually “glad” (grin) to hear that I am not the only one who is experiencing this issue. Not to say that I would wish this problem upon anyone. I am just glad that I am not going nuts thinking I am the only one with this issue.
Every 5505 we have installed to replace a PIX 501 has resulted in the DNS entries disappearing from our server. It worked fine when they had the 501 in place, but, as soon as we put the 5505 there,……
Also, we do concur that when the address is statically assigned, the entry does get created.
If you would send me an e-mail, we can maybe work together to resolve this one.
I have a temporary address of <b>(removed for security) </b> I will send you my real address when you contact me.