### to <nanog@Merit.Net> concerning "Problems with specific routing policies
### for each exchange point":
I ran in to a little problem yesterday with my peering sessions wih the
various route servers around the country. The problem was that I was not
receiving routes from particular ASNs anymore. With a little help from Jake
at Merit we were able to pinpoint the problem in my rs-in configuration. It
seems that I was importing two different AS macros that each referenced the
other (AS-GENUITY and AS-NAPNET). This created a loop in the macro parser
on the route server which in turn nullified my routing policy.
I would reccommend anyone referencing any of those two macros in their rs-in
or rs-out to discontinue doing so at least until which time I can throw in a
bugfix to handle looping expansions. Currently the expansion routine in the
preprocessor will reach a depth limit and then spit out an error which gets
interpretted by the main routine as a bogus expansion. This will nullify
that import.