[41366] in North American Network Operators' Group
RE: web pages not loading (from certain networks) but not a routi
daemon@ATHENA.MIT.EDU (Young, Jason)
Fri Sep 7 11:02:59 2001
Message-ID: <DDF5392E0FB3D41196C10008C7D9AE5D05E00F4C@STLABCEXG022>
From: "Young, Jason" <Jason.Young@anheuser-busch.com>
To: "'Nanog'" <Nanog@exchange.ware.net>, nanog@merit.edu
Date: Fri, 7 Sep 2001 10:00:32 -0500
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Errors-To: owner-nanog-outgoing@merit.edu
This reeks of an MTU problem somewhere.
Did you happen to have ICMP filtered to/from your sites recently? Remember, ICMP
isn't just that protocol that lets you ping stuff. You may have broken path MTU
discovery.
Jason Young
CNS - Network Design, Anheuser-Busch
(314)577-4597
> -----Original Message-----
> From: Nanog [mailto:Nanog@exchange.ware.net]
> Sent: Friday, September 07, 2001 9:52 AM
> To: nanog@merit.edu
> Subject: web pages not loading (from certain networks) but
> not a routing
> i ssue.
>
>
>
> 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
>
>
