That *almost* sounds like a DNS issue, like maybe the Sonicwall is blocking DNS requests for HTTP/HTTPS.
John-AldrichTile-Tools From: Lists - Level5 [mailto:li...@levelfive.us] Sent: Thursday, August 26, 2010 11:38 AM To: NT System Admin Issues Subject: RE: Bandwidth problems Thanks guys for trying to help. We have a 20MB MetroEthernet that was plugged into a Cisco router, the cisco was removed last night as a possible issue, and it wasn't needed anyway. We have jumbo frames throughout, but on the WAN I cannot enable more than 1500 MTU. I am installing Viewpoint now to try and see whats happening, on the internal Procurve we don't have anything as far as errors where the LAN port is , and Im logging high now on the Sonicwall and even doing some packet captures. I have never seen anything like it. For example if I goto www.msn.com it will say page not found after about 20 secs, but then if I go and ping www.msn.com and then re-open IE/FF the page comes right up . This is happening throughout the 500 pc's in the office, and my laptop (which is only on the network by IP). Its almost like im being blocked on http/https but not always, the 40-50 users who work remotely through TS randomly get disconnected, but I can be on the server via Radmin and stay on for days w/o losing the connection from my office to their office. From: Andrew S. Baker [mailto:asbz...@gmail.com] Sent: Wednesday, August 25, 2010 12:53 PM To: NT System Admin Issues Subject: Re: Bandwidth problems Do you have any QoS enabled somewhere? Also, do you have jumbo frames enabled all throughout the network? Lastly, what kind of connectivity is this (and what kind of router is upstream from you)? DS1, DS3, DSL, Cable, etc? ASB (My <http://XeeSM.com/AndrewBaker> XeeSM Profile) Exploiting Technology for Business Advantage... Signature powered by <http://www.wisestamp.com/email-install> WiseStamp On Wed, Aug 25, 2010 at 11:55 AM, Level 5 Lists <li...@levelfive.us> wrote: I have been troubleshooting a bandwidth problem where connections are dropping. We ran some different tests like speedtest and pingtest as well as a trial of visualware. Everything points to tcp max delay (300ms) being a major issue and suggests packet loss. I have run some tracerts for the ISP and they say its not their side. I tend to believe them a little because if we unplug our Sonicwall and go directly the problem goes away. As a test I rolled out a new Sonicwall 5500, reconfigured it and the problem still exists. We are jumbo framed enabled internally, and our procurve mgmt software has some intermittent issues throughout the network but nothing specific. Does anyone have any good tools they could recommend to test internal connectivity, the few tools i see just test speed which seems to be running just fine (qcheck). Thx ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
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