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

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