Re: Router Solicitations

[JINMEI Tatuya / 神明達哉 <Jinmei_Tatuya@isc.org>]

At Tue, 10 Jun 2008 11:25:09 +0200,
Niklas Neumann <niklas.neumann@cs.uni-goettingen.de> wrote:

> I have a question regarding RFC 4861, Section 6.3.7. "Sending Router 
> Solicitations". The RFC states that when a host is sending a Router 
> Solicitation, "the IP source address is set to either one of the 
> interface's unicast addresses or the unspecified address."
> 
> So my question is
> 1) when is a host supposed to set a unicast address and
> 2) what qualifies as "one of the interface's unicast addresses?"

My understanding is:

1) whenever it has a valid unicast address (i.e., almost anytime)
2) any valid unicast addresses that are proved to be unique assigned
   to that interface

> For example: Is an implementation supposed to remember the last address 
> an interface had and to include this address in a Router Solicitation 
> after the host attaches to a new link?

No.

---
JINMEI, Tatuya
Internet Systems Consortium, Inc.