> recently it was found that knob = 1 is not a good idea as we have > protocols that use multiple TCP sessions - for instance, suppose you > are ftp server and TCP control connection attempt is sent to deprecated > address. with knob = 1 we accept it. then when we are to make active > TCP data connetion with EPRT (IPv6 PORT), we can't make it as we are > forbidden to make TCP connection with deprecated IPv6 address as the > source.
Note that we are NOT forbidden, but just required valid reasons to do so (from the definition of 'SHOULD NOT' of RFC 2119). In your ftp scenario, you can (or should) use deprecated address to avoid service disruption. page 2 in RFC 2462: | when possible. A deprecated address should be used only by | applications that have been using it and would have difficulty | switching to another address without a service disruption. Atsushi Onoe -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
