Matsushima-san, > I have a question about MTU option in router advertisement. > The draft says: > >> "A 6rd CE SHOULD advertise the 6rd Tunnel MTU, whether determined >> automatically or configured directly, on the LAN side by setting the >> MTU option in Router Advertisements [RFC4861] messages to the 6rd >> Tunnel MTU." > > My understanding of the role of MTU option in RA is that if hosts are in > configuration in which different media type are bridged, advertising mtu size > all media supported. > > Does CPE should advertise the 6rd Tunnel MTU even 6rd tunnel does not bridged > to CPE LAN side?
if you are thinking of the text in RFC4861 I read that as an _example_ of a case where the MTU option could be used. do you see any problems with recommending to match the LAN-side MTU with the WAN-side MTU? assuming we cannot get to something like SEAL in time (RFC5320) Best regards, Ole >> hi, >> >> we've just posted an updated revision of the 6rd draft, which we >> believe is ready for last call in the softwires and dhc working >> groupsl. >> >> apart from cleaning up text the main changes are in the DHCP option, >> which now includes a list of BR IPv4 addresses. (I misread RFC3396 to >> allow for multiple DHCP options as a way of doing this, unfortunately >> not so with the format we had. thanks to the dhc wg expers for >> correcting me.) >> >> we have also taken out all deployment considerations which were in the >> revision 03 draft. if anyone is interested in taking that work up, it >> could be a separate draft in v6ops. >> >> the complete diff-set is available here: >> http://tools.ietf.org/rfcdiff?url2=draft-ietf-softwire-ipv6-6rd-04.txt >> >> Best regards, >> Ole >> >> >> >> ---------- Forwarded message ---------- >> From: <[email protected]> >> Date: Wed, Feb 3, 2010 at 4:45 PM >> Subject: [Softwires] I-D Action:draft-ietf-softwire-ipv6-6rd-04.txt >> To: [email protected] >> Cc: [email protected] >> >> >> A New Internet-Draft is available from the on-line Internet-Drafts >> directories. >> This draft is a work item of the Softwires Working Group of the IETF. >> >> >> Title : IPv6 via IPv4 Service Provider Networks "6rd" >> Author(s) : M. Townsley, O. Troan >> Filename : draft-ietf-softwire-ipv6-6rd-04.txt >> Pages : 16 >> Date : 2010-02-03 >> >> This document specifies an automatic tunneling mechanism tailored to >> advance deployment of IPv6 to end users via a Service Provider's IPv4 >> network infrastructure. Key aspects include automatic IPv6 prefix >> delegation to sites, stateless operation, simple provisioning, and >> service which is equivalent to native IPv6 at the sites which are >> served by the mechanism. >> >> A URL for this Internet-Draft is: >> http://www.ietf.org/internet-drafts/draft-ietf-softwire-ipv6-6rd-04.txt >> >> Internet-Drafts are also available by anonymous FTP at: >> ftp://ftp.ietf.org/internet-drafts/ >> >> Below is the data which will enable a MIME compliant mail reader >> implementation to automatically retrieve the ASCII version of the >> Internet-Draft. >> >> >> _______________________________________________ >> Softwires mailing list >> [email protected] >> https://www.ietf.org/mailman/listinfo/softwires >> _______________________________________________ >> Softwires mailing list >> [email protected] >> https://www.ietf.org/mailman/listinfo/softwires > _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
