On Wed, 18 Jul 2001, Chris Wedgwood wrote:
On Wed, Jul 18, 2001 at 07:57:23AM +0100, Stephen J. Wilcox wrote:
Could it be Path MTU/fragmentation issues on account of the low MTU you have in combination with some ICMP issues where network admins have some screwy setup?
That's exactly what it is... a large (1500 byte probably) TCP datagram with the DF bit set will be heading towards his edge device which are PPPoE connected.
Great domain, btw (f00f.org, brings back memories of division)... Anyway, a great stride was just made in my lab^H^H^Hbasement. First off, it appears a 'ip mtu 1492' on the Virtual-Template of the IOS Router aggregating the PPPOE session is not strictly enforced, especially with windows. Another words, I saw in the PPP debug that the MRU wasn't being negotiated. So, I found this really nifty utility, aptly named 'Mr. TCP': http://www.dslreports.com/front/drtcp.html It allows you to tinker with the Windows settings of TCP. I adjusted MTU to 1400, wham-o, all the sites I listed started working; including, what I didn't list before, the downloading of transactions via Quicken. Seems to be a fixall. -- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben -- -- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --