[db-wg] "AND NOT" in as-expression

Good morning all,

After tinkering around with import-via/export-via attributes, I realised that "AND NOT" is not supported in the as-expression part of peering specifications,
although it is described in RFC2622 (along with the semantically equivalent EXCEPT) and included in example (6) of page 25. 

e.g. currently:

import: from AS-AMS-IX-PEERS and not AS6777 accept ANY  

is not supported, while

import: from AS-AMS-IX-PEERS except AS6777 accept ANY

is.

I have raised a ticket with RIPE NCC about it. Also, Job Snijders was kind enough to act quickly and provide patches for both irrtoolset and whois:
https://github.com/RIPE-NCC/whois/pull/237
http://irrtoolset.isc.org/ticket/48


Kind regards,
Aris Lambrianidis
AMS-IX


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