PCRE or death. Tell me if I am wrong, but I thought PCRE was the most widely used regex lib these day anyways. I also thought it was already in Junos.
Sent from my iPhone > On Aug 19, 2021, at 7:56 AM, Jeffrey Haas <jh...@pfrc.org> wrote: > > ORFs are a challenging feature and haven't gotten a lot of deployment for a > number of reasons. > > At a high level, they're a very coarse filter. Since each new ORF type adds > to the logical AND condition, you start having to be more and more permissive > in what you permit in the policy. Since a significant amount of common ISP > policies require matching things in tuples, this doesn't translate super well > into many types of automatically generated ORFs. > > The ext-community-orf feature was effectively supplanted by Rt-Constrain (RFC > 4684). > > The as-path ORF was challenging because different vendors have different > ideas about what "regex" means and what the input tokens are. Consider for > example Juniper vs. Cisco regex matching. The abstract fix would have been > to define a regex that is for the feature. I half suspect if people pushed > on this these days, they'd want PCRE. :-) > > The RD-ORF work is part of some ongoing discussion about how to deal with VRF > overwhelm (prefix-limit exceed). > > -- Jeff (IDR co-chair) > >> On Aug 18, 2021, at 1:10 PM, Douglas Fischer <fischerdoug...@gmail.com> >> wrote: >> >> Hello! >> >> I also found a recent draft(expires Novembre 2021) about using Route >> Distinguisher as a Value on ORF. >> https://datatracker.ietf.org/doc/draft-wang-idr-rd-orf/ >> >> >> >> >> Em qua., 18 de ago. de 2021 às 11:41, Humberto Galiza >> <humbertogal...@gmail.com> escreveu: >>> Hi, >>> >>> Is anyone aware of any vendor that supports Outbound Route Filtering >>> (ORF) based on anything other than prefix-lists? >>> >>> I found these two old IETF drafts (both expired :-/) which supported >>> the idea of filtering based on community and as-path respectively, but >>> I wasn't able to understand if they were ever discussed at the WG and >>> if there was any outcome of the discussion (I suspect the authors are >>> no longer even working with the mentioned companies in the drafts): >>> >>> - https://datatracker.ietf.org/doc/html/draft-chen-bgp-ext-community-orf-02 >>> - https://datatracker.ietf.org/doc/html/draft-ietf-idr-aspath-orf-13 >>> >>> Any info is very much appreciated. >>> >>> Thanks, >> >> >> -- >> Douglas Fernando Fischer >> Engº de Controle e Automação >
