In answer to this puzzle, the consensus on NANOG was that the problem may be related to an MTU mismatch. A couple of folks keyed in on "DSL" and the described symptom, and noted that there have been similar problems caused by MTU issues within the DSLAMS used by the carriers noted in the message below. As of this writing, the guy who asked the question has not reported any further information. Chuck -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Chuck Larrieu Sent: Friday, September 07, 2001 7:40 PM To: [EMAIL PROTECTED] Subject: FW: web pages not loading (from certain networks) but not a [7:19074] Saw this one on NANOG today. Any of you troubleshooting gurus want to take a crack? ( BTW, I believe I saw this problem myself today. OTOH, my issue could have been related to that stupid proxy my employer now makes me use. ;-> ) I'll post the answer the NANOG folks suggested later this weekend. Chuck -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Nanog Sent: Friday, September 07, 2001 7:52 AM To: [EMAIL PROTECTED] Subject: web pages not loading (from certain networks) but not a routing issue. Ok guys, Interesting problem that seems to have started on Friday. Here's the deal, it seems that certain (not all) web pages on various sites we host are not loading for certain customers. It started on Friday with visitors on Verizon DSL waiting forever for pages to load. Yesterday and today PacBell DSL and some Netcom customers started complaining. This only seems to occur on HTTP traffic. If we have the visitors try HTTPS the pages load fine (with the normal encryption slowdown). We've looked at Layers 1-4, and can't see any problems, ping looks great, interfaces and cpus on routers, servers and switches look fine. It's almost like it's a transparent cache "bug". Anyone know if Inktomi, or any major cache vendors rolled out any new code this week? For that matter does anyone know what caches Verizon and SBC use for starters? Other variables: it only seems to occur on IIS based systems (I know I know, no flame wars or suggestions for replacements). Although it's not happening on all of our IIS servers. Any clues are greatly appreciated. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=19225&t=19225 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
