mesh portal discovery

[David Woodhouse]

On Wed, 2008-01-09 at 14:33 -0500, John Watlington wrote:
> Unsolicited RAs for IPv6 mean that IPv6 isn't the panacea to this
> problem. It's easy to discover the shortest way out of the mesh
> (nearest mesh portal), but setting up the larger mesh networkl
> infrastucture means you also need to provide a way to route packets
> back INTO the mesh through the MPP nearest the destination laptop.
> 
> I have yet to see a good description of how to make IPv6 work right on
> a mesh with multiple portals.    One would be welcome!

I talked to cscott and Michail about this briefly when I was in Boston
in December. I suspect we should turn off the automatic response to RA
in the kernel, and handle it in userspace. We need some special handling
in userspace anyway, to pick up DNS server details from RA. We can also
check the mesh path length to the origin of each RA we see, and choose
the best one.

> I have such a method for IPv4 defined, but due to an error in
> modifying the DHCP client, it doesn't handle laptops moving around in
> the mesh once they've chosen an MPP.   (BTW, the error was mine)

Is there a hack which would work around that -- like reducing the lease
time?

-- 
dwmw2