A
andreww
As per the title, I'm using 64-bit ultimate in a 2003 domain. Brand
new install and I've noticed that frequently (talking 3-4 times a day
here) the DNS service appear to suddenly stop being asked to perform
lookups. The service itself never appears hung or stopped, but
wireshark suddenly reports broadcast being used to look up hosts
instead of DNS.
As soon as I restart the DNS service, normal service resumes.
I've also installed the ISA client and it's the same operation. Trust
me, my network settings are correct
It's as simple as :
c:\>ping testmachine
Ping request could not find host testmachine. Please check the name
and try again.
(wireshark shows broadcast)
c:\>nslookup
Default Server: ourinternaldnsserver.x.x.x
Address: 10.40.x.x:53
Address: 10.40.x.x:53
Name: testmachine.x.x.x
Address: 10.40.2.7
(wireshark shows proper DNS query and result as expected)
c:\>ping testmachine
Ping request could not find host testmachine. Please check the name
and try again.
(wireshark shows broadcast for name lookup)
(restart DNS service)
c:\>ping testmachine
Pinging testmachine.x.x.x [10.40.x.x with 32 bytes of data:
Reply from 10.40.x.x: bytes=32 time<1ms TTL=255
(wireshark shows dns lookup, followed by icmp)
etc.
(Note that this isn't a DNS postfix issue, results are the same
whether the full domain name is specified or not). Also, by and large
the reason that broadcast don't return an answer is that I'm going
across routed nets, and also frequently to unix hosts.
Any ideas? It's enough to be annoying. Have been googling for a while,
no joy as yet
Thanks
AW
new install and I've noticed that frequently (talking 3-4 times a day
here) the DNS service appear to suddenly stop being asked to perform
lookups. The service itself never appears hung or stopped, but
wireshark suddenly reports broadcast being used to look up hosts
instead of DNS.
As soon as I restart the DNS service, normal service resumes.
I've also installed the ISA client and it's the same operation. Trust
me, my network settings are correct

It's as simple as :
c:\>ping testmachine
Ping request could not find host testmachine. Please check the name
and try again.
(wireshark shows broadcast)
c:\>nslookup
Default Server: ourinternaldnsserver.x.x.x
Address: 10.40.x.x:53
Server: ourinternaldnsserver.x.x.xtestmachine
Address: 10.40.x.x:53
Name: testmachine.x.x.x
Address: 10.40.2.7
(wireshark shows proper DNS query and result as expected)
c:\>ping testmachine
Ping request could not find host testmachine. Please check the name
and try again.
(wireshark shows broadcast for name lookup)
(restart DNS service)
c:\>ping testmachine
Pinging testmachine.x.x.x [10.40.x.x with 32 bytes of data:
Reply from 10.40.x.x: bytes=32 time<1ms TTL=255
(wireshark shows dns lookup, followed by icmp)
etc.
(Note that this isn't a DNS postfix issue, results are the same
whether the full domain name is specified or not). Also, by and large
the reason that broadcast don't return an answer is that I'm going
across routed nets, and also frequently to unix hosts.
Any ideas? It's enough to be annoying. Have been googling for a while,
no joy as yet

Thanks
AW