I already implemented that solution (for DNS name resolution) on downstream isa servers. (I repeat) Everything works just fine until isa start to work slow for no reason. When I saw ISA to slow down I instantly log on to upstream isa servers and I saw that upstream servers were bottleneck. Those two servers alone cannot retrive pages fast (they are not cache servers). ISA works fast and 10 min extra slow â fast â slow â I spent so much time for this project and I donât want to see that ISA work slow for no reason. â Darko KljajiÄ Administrator for operating systems IT Department tel: +381 11 201 1567 mob: +381 64 811 1655 e-mail: darko@xxxxxxxxxxxxxxxx =========================== Delta Banka A.D. Milentija PopoviÄa 7b, Belgrade Serbia & Montenegro site: www.deltabanka.co.yu =========================== ________________________________________ From: josephk [mailto:josephk@xxxxxxxxx] Sent: 21. januar 2005 20:39 To: [ISAserver.org Discussion List] Subject: [isalist] RE: Strange performance http://www.ISAserver.org Hi Darko, I run back to back networks with ISA and donâtâ have the slowness problem. I do sometimes receive pages that are garbled and look like binary representations of the pages and or items that I was trying to download. After I refresh my page that disappears. Not sure if this is related to caching on ISA or not. The other issue is how the front end ISA is using DNS to get pages or to your backend ISA. And then again from your backend ISA out to the front-end ISA and external network. Thomas showed me this link which helped on speed http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/disablenameresolution.mspx and DNS resolution. Thank you, Joseph ________________________________________ From: Ball, Dan [mailto:DBall@xxxxxxxxxxx] Sent: Friday, January 21, 2005 10:41 AM To: [ISAserver.org Discussion List] Subject: [isalist] RE: Strange performance http://www.ISAserver.org I donât know why this happens, but I have seen it happen here. In fact, I had an open support case with Microsoft at the time about this, and sent them diagnostic logs while it was happening, which they are still perusing. ________________________________________ From: Darko Kljajic [mailto:darko@xxxxxxxxxxxxxxxx] Sent: Friday, January 21, 2005 12:42 To: [ISAserver.org Discussion List] Subject: [isalist] Strange performance http://www.ISAserver.org Hi to all, I have installed four ISA Servers 2004 in back to back configuration. (test prepare to go live) I have two downstream isa servers with NIC Teming for every network and NLB only for Internal network (caching servers) + two upstream isa servers also with NLB and Teaming. Everything works fine (almost perfectly) â until ISAs suddenly get lazy. ISAs retrive sites so slowly that everyone start to complain. I look up in router log (router to internet provider) and I saw that our link have always spare 100 kbytes/s. So I supposed that network bandwidth isnât a problem. I also look in ISAs performance counters and everything looks fine (COLD). I do all the tuning for operating systems (3GB switch â) and I give downstream ISAs to use 50% of memery for caching. Does anyone have a clue what is happening?? Hardware configuration (4 servers): 2 x 3.06GHz 4GB RAM 256 MB SCSI Controler 3 x 36GB Hard Disks 4 (6) NIC PS: NLB works with Layer3 Switch Darko KljajiÄ Administrator for operating systems IT Department tel: +381 11 201 1567 mob: +381 64 811 1655 e-mail: darko@xxxxxxxxxxxxxxxx =========================== Delta Banka A.D. Milentija PopoviÄa 7b, Belgrade Serbia & Montenegro site: www.deltabanka.co.yu ===========================