[2004] in Commercialization & Privatization of the Internet
Re: Dialog
daemon@ATHENA.MIT.EDU (oleary@sura.net)
Fri Jan 17 12:59:53 1992
To: willis@cs.tamu.edu (Willis Marti)
Cc: bill@tuatara.uofs.edu, com-priv@psi.com, daveh@csn.org, oleary@sura.net
In-Reply-To: Your message of "Fri, 17 Jan 92 08:39:35 CST."
Date: Fri, 17 Jan 92 12:51:56 -0500
From: oleary@sura.net
Willis,
Usually a traceroute will * * * when the site you are trying to
reach (or routers along the path) don't have a route back to your
network.
In this case, I expect that either there was some kind of transient
problem with routing on the T3 network, or more likely, ANSnet
is configured not to send routes into sections of the network
which only connect CO sites for those mid-levels which have not
signed the appropriate contracts. This is how the Merit
Engineering staff explained to me their method of handling this
type of site.
In other words, the next hop on the path is probably the ENSS that
connects Dialog. The CNSS that it is connected to sends routes
only for those networks connected to mid-levels that have signed
the appropriate agreements, and no default route, so the router
gets a packet frmo you, tries to send a TTL expired, and finds
that it doesn't have a route back to you, so you never get and
answer.
dave o'leary
SURAnet
