NW51SP5 BM35 in place for about 2 1/2 years as IP Gateway and Proxy.

Beginning yesterday, I go through periods of nearly constant beeping,

"Get hostname failed for IP address:[Variety of IPs]"

Checking the SYS$LOG.ERR I see that this is not as rare as I had
thought, but as I say, it's going through periods of being constant.

Any thoughts?