On Thu, Aug 14, 2014 at 12:15:36AM -0400, Patrick W. Gilmore wrote: > Composed on a virtual keyboard, please forgive typos. > > > On Aug 13, 2014, at 22:59, Suresh Ramasubramanian <ops.li...@gmail.com> > > wrote: > > > > Swisscom or some other European SP has / used to have a limit where they > > would not accept more specific routes than say a /22 from provider x, so if > > you wanted to take a /24 and announce it you were SOL sending packets to > > them from that /24 over provider y. > > > > Still, for elderly and capacity limited routers, that might work. > > And Sprint used to filter on /19s outside swamp space. (See NANOG 1999 > archives for my [wrong then corrected] interpretation of ACL112.) Etc., etc. > > For stub networks, especially ones who are not as performance sensitive, this > can help extend the life of their routers. But not everyone can make AGS+s > work for years past their useful life or get "-doran" IOS builds. The 6500 > was first sold in 1999. I'm impressed it has lasted this long, even with new > sups. Time to start thinking about upgrading.
Just as a historical note, Sprint didn't have AGS+ or such equipment that were being propped up by the /19 filters (at least for the vast majority of the filter's existence). Neither did Verio. Those filters were primarily an attempt to enforce a certain behavior. Also, my recollection is that during that era "named" builds were typically named via receipient's well known email id, e.g."-smd" or first name "-sean" and I don't think I've ever seen it named after the last name unless it was their email id as well. -dorian
