AS path extensions

Cengiz,

> Neat. I need a clarification. Do you allow negation of any regular
> expression or just negation of as numbers? If you allow just the
> negation of as numbers, how do you represent [^100 200]*, i.e. as
> paths containing neither 100 nor 200?

The syntax in principle allows negation of any regular expression, and
the code might some day, but because I couldn't figure out how to rewire
arbitrary REs the code that exists bails out if the expression being negated
looks too ugly.  To answer the particular question, however,

	(!(100 | 200))*

should work fine.

>> I do this as
>> 
>> 	import as-path-exp-1 preference 1 {
>> 		net ...
>> 		net ...
>> 		all continue ;
>> 	} ;
>> 	import as-paths-exp-2 preference 2 {
>> 		net ...
>> 		net ...
>> 		all restrict ;
>> 	} ;
>
> This would be perfect. Is this implemented?

A lot of code implementing specific functions has been written, but there
is still some work to do on the gated it is supposed to run in.  We tried
to add a whole bunch of new stuff to the code simultaneously and ended
up with a whole lot of work to do to get anything at all running.

Dennis



-------- Logged at  Thu Mar 16 18:25:53 MET 1995  ---------