Archived posting to the Leica Users Group, 2007/12/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Brian, Service was back up between us around 9:20 CST. My wife taped the 10:00 news on Nashville's Channel 2, and they reported that AT&T was down, and did not know the cause. All of the Bellsouth links are now a part of AT&T. Thanks for the details on the links. That explains why, when I ran some speed checks on my DSL line, it was much faster to link to Atlanta than to San Francisco. Jim Nichols Tullahoma, TN USA ----- Original Message ----- From: "Brian Reid" <reid@mejac.palo-alto.ca.us> To: "Leica Users Group" <lug@leica-users.org> Sent: Monday, December 03, 2007 9:36 PM Subject: Re: [Leica] Internet Service Interruption > Problems like this one are not inside your ISP per se, but are rather in > the interconnection between your ISP and others. > > The original message was from Jim Nichols. Presumably his service has been > restored. Just now I ran a trace between the LUG computer and his home > computer. That trace showed 25 different links, which I can summarize as: > > Palo Alto California -- my house > San Francisco, at 200 Paul Avenue, which is where my T1 circuit goes > San Jose, CA -- Level 3 Communications, Inc > Atlanta -- Level 3 Communications > Atlanta -- Bell South > (someplace that I can't identify, with location code "AXR") > Nashville -- Bell South > Jacksonville, Florida -- Bell South > > at that point I sort of host the trail, because Bell South wouldn't let me > probe further into its network. > > This means that for you (Jim Nichols) to communicate with the LUG, your > ISP has to be working, their connection to Level 3 has to be working, > Level 3 has to be routing datg from Atlanta to San Jose, and my ISP has to > be properly communicating with Level 3 in San Francisco. > > Even as I type this, the connection between my ISP and Level 3 has stopped > working, which isolates me from those portions of the Internet to which > Level 3 is the preferred path from 200 Paul in San Francisco. > > It's fragile. > > Brian Reid > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >