Or....... You're going over a vpn tunnel, right? I've got wug going over a cisco vpn as well. And cisco says - In order for the tunnel to stay "up", a certain amount of interesting traffic at sufficient intervals needs to traverse the tunnel otherwise the vpn routers "times out" and takes down the tunnel. So, the first dns query from whatever, user or wug, may not be getting to the dns server. Result, dns service down. Wug tries again and the service is there because the first query brought the tunnel back up.
TC -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bond, Duncan Sent: Friday, January 02, 2004 1:49 PM To: '[EMAIL PROTECTED]' Subject: RE: [WhatsUp Forum] DNS services continuously going down and up You should also note that if WUG is having the problem, so (most probably) are the users of the DNS server. This can manifest in slow or broken sessions; if the users have a backup server defined, transactions will work, but will be slow because it takes time for the DNS failure to retry, then switch. We had a similar problem caused by improper duplex negotiation between DNS server and switch; WUG accurately reported intermittency on the server. -----Original Message----- From: Daniel Donnelly [mailto:[EMAIL PROTECTED] Sent: Friday, January 02, 2004 4:41 PM To: [EMAIL PROTECTED] Subject: Re: [WhatsUp Forum] DNS services continuously going down and up Goran, Have you tried increasing the Timeout on that device? I'd double it, for now... I suspect some unknown load (Exchange??) on the server is causing a random delay is answering the DNS query. Setting a longer timeout may cause the device to be seen as up more often . In other words, the longer timeout may help, but may not make the problem go away, just won't show up as often in WUG. If the longer timeout helps, then I'd look more carefully at that server for resource issues... Dan Donnelly ----- Original Message ----- From: "Goran Jovanovic" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, January 02, 2004 9:01 AM Subject: RE: [WhatsUp Forum] DNS services continuously going down and up It is a Windows 2000 server, SP 4 running Exchange 2000 SP3 for about 20 users. Not really high load at all. Goran Jovanovic The LAN Shoppe 2345 Yonge Street, Suite 302 Toronto, Ontario M4P 2E5 Phone: (416) 440-1167 x-2113 Cell: (416) 931-0688 E-Mail: [EMAIL PROTECTED] _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Tolmachoff (Lists) Sent: Friday, January 02, 2004 2:05 AM To: [EMAIL PROTECTED] Subject: RE: [WhatsUp Forum] DNS services continuously going down and up Is the DNS server a Windows server 200x server under very high query load with a large cache? John Tolmachoff Engineer/Consultant/Owner eServices For You -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Goran Jovanovic Sent: Thursday, January 01, 2004 8:52 PM To: [EMAIL PROTECTED] Subject: [WhatsUp Forum] DNS services continuously going down and up Hi All and Happy New Year to everyone, I am monitoring a number of my client's servers via a VPN tunnel and there is this one server that is setup just like all the others but it keeps reporting that the DNS services goes down. Then on the next poll (or so) the services comes back to life. Life is fine for 30 to 90 minutes when the DNS goes down again. I have the alarm trigger set to 4. I have checked the server and there are no entries in the event log for problems. Any thoughts on what could be causing the DNS to fail and then reappear? Thanx Goran Jovanovic The LAN Shoppe 2345 Yonge Street, Suite 302 Toronto, Ontario M4P 2E5 Phone: (416) 440-1167 x-2113 Cell: (416) 931-0688 E-Mail: [EMAIL PROTECTED] Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/whatsup_forum%40list.ipswitch.com/ Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/whatsup_forum%40list.ipswitch.com/ Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/whatsup_forum%40list.ipswitch.com/
