Juergen This topic kicked off with http://www.ietf.org/mail-archive/web/ipv6/current/msg14975.html as a report of some unexpected behaviour in Firefox and the view there was that BSD and Linux imposed a limit of 15 characters.
The question also arose as to whether or not this impacted DNS. Tom Petch ----- Original Message ----- From: "Juergen Schoenwaelder" <j.schoenwael...@jacobs-university.de> To: "Brian E Carpenter" <brian.e.carpen...@gmail.com> Cc: "6man" <ipv6@ietf.org> Sent: Tuesday, February 07, 2012 11:40 AM Subject: Re: Reviews requested: draft-carpenter-6man-uri-zoneid-00.txt > Hi, > > I have one question. The I-D restricts zoneid names to 15 characters: > > ZoneID = 1*15unreserved > > This raises the question why limiting this to 15 characters. I know > that at my Linux and MacOS X boxes have this limit (and I would not be > surprised if BSDs do as well) but at the end it is a #define. So the > question is whether this limit should be hard coded in the URI format. > Looking at RFC 3986, I see > > reg-name = *( unreserved / pct-encoded / sub-delims ) > or > port = *DIGIT > > and it appears there is no limit in the URI format on DNS names or > port numbers (even though today's DNS and transport protocols put > limits on those things). > > /js > > PS: I am asking this question because there is a MIB object ifName > that has a limit of 255 ASCII characters (I assume basically due > to SNMP constraints) and there is a YANG module in the making > which currently allows 255 UTF-8 characters and I think it would > be nice to think a moment about how these things fit together. > > PS: RFC 3493 only says there is a constant IF_NAMESIZE - so the socket > API does not really say what the interface name size limit really > is. > > -- > Juergen Schoenwaelder Jacobs University Bremen gGmbH > Phone: +49 421 200 3587 Campus Ring 1, 28759 Bremen, Germany > Fax: +49 421 200 3103 <http://www.jacobs-university.de/> > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > > -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
