Please fine inline response. Parav
--- On Fri, 4/16/10, Suresh Krishnan <[email protected]> wrote: > From: Suresh Krishnan <[email protected]> > Subject: Re: deriving MAC address from destination Link local address without > Neighbor discovery > To: "Parav Pandit" <[email protected]> > Cc: "[email protected]" <[email protected]> > Date: Friday, April 16, 2010, 5:46 AM > Hi Parav, > Please see comments inline. > > On 10-04-15 01:55 AM, Parav Pandit wrote: > > Hi, > > > > As per RFC 2464, Link local address for Ethernet based > interfaces are based on the EUI-64 (derived from the MAC > address). > > > > I have #3 questions based on this. > > > > In this case, when one Ethernet based host(from its > link-local source) tries to ping the other Ethernet based > host, it knows the Mac address implicitly (from the Link > local address). > > > > 1. Why is it required to explicitly do the Neighbor > discovery for the link-local addresses? > > RFC 4861 says to do the neighbor discovery even for > link-local addresses. > > Correct me if my understanding is incorrect. > > Address resolution is required even for link-local > addresses. Link-local addresses can be formed with arbitrary > IIDs that do not need to be derived from MAC addresses and > more importantly <the IIDs carry no indication whether > they were formed from MAC addresses or not>. > > > > > 2. Does it mean that in Ethernet networks, interface > can have only one Link-local address? If not then we violate > the RFC 2464. > > RFC2464 does not have any normative language in this > regard. Why do you think this will violate RFC2464? > [Parav] RFC 2464 says, it can fall back to other mechanism of assigning it by administrator when ND fails (other system owns it). Its silent about the "not using" other mechanism. So I thought EUI-64 is the only way to assign link-local address. Thanks for the clarifications. > > > > 3. Does RFC 4941 Privacy extension for autoconf apply > to Ethernet interfaces? > > Yes. Certainly. > > Thanks > Suresh > > -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
