Erik, I am getting back to replying to some emails that were sent in response to our drafts. I did explain what an aggregation router was when we met face to face at IETF. If you had read our drafts, that was one way to learn about properties of an aggregation router wrt to ND. It was unfortunate, neither you or Hesham had read our drafts when folks like Jinmei Tatuya, Alain Durand, Jari, and Vlad have.
Anyhow, RFC 4388 mentions an access concentrator. When this concentrator supports routing, the device is an aggregation router. Hemant -----Original Message----- From: Erik Nordmark [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 05, 2007 3:29 PM To: Hemant Singh (shemant) Cc: Suresh Krishnan; ipv6@ietf.org Subject: Re: Off-link and on-link Hemant Singh (shemant) wrote: > Suresh, > > At least our drafts do not ask for a new off-link flag. Without a new > off-link flag your scenario will have to go with (a). But do note, > aggregation routers do not send Redirects. So the scenario below > cannot be even supported on aggregation routers. Which RFC defines an "aggregation router"? Erik > > Hemant > > -----Original Message----- > From: Suresh Krishnan [mailto:[EMAIL PROTECTED] > Sent: Wednesday, December 05, 2007 11:01 AM > To: ipv6@ietf.org > Subject: Off-link and on-link > > Hi Hesham/Dave/Erik, > I am not taking a stand on whether an explicit off-link flag is > necessary/useful or not, but I have encountered a scenario where the > existing algorithm specified in RFC4861 does not work very well. Let's > say a router wants to signal to the clients that 2001:dead:beef::/48 > is on-link except for 2001:dead:beef:abcd::/64 that is off-link. How > would it go about describing this? I see two ways > > a) Advertise the /48 with L=0 and send redirects for all addresses not > on the /64 > b) Advertise the /48 with L=1 and the /64 with Q(the new off-link > flag)=0 > > I see b) as being more efficient than a) > > P.S: I do not think that this scenario is very likely, just possible. > > Cheers > Suresh > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
