Hi Suresh, Suresh Krishnan wrote: > > Hi Ralph, > <Snipped a whole lot of old quoting> > > On 10-08-26 08:18 PM, Ralph Droms wrote: > > Suresh... > > > > But the multicast RAs don't advertise prefixes, right, so the > > subscriber nodes won't be able to complete SLAAC? > > Correct. > > > I think the point is to use standard node stacks: Windows 7, OS X, > > Linux. Do any of them send periodic RSs? > > No. All of them send RSs (3) on interface initialization. If no routers > are found, there is no periodic retransmission mechanism like for DHCPv6 > Solicits. This is true of SLAAC in general (with or without RS marking). > > > But this option isn't all that is needed for the deployment > > architecture, > > Correct. But the rest is standard RFC4861/RFC4862 behavior. > > > and it appears that there is a significant problem with that > > deployment architecture. > > I would not say it is a problem with the deployment architecture. As I > said in mails to Thomas and Woj, the issue occurs in other deployment > architectures that need to use different prefixes over the same shared > L2 domain (e.g. WLAN AP with 2 SSIDs mapped into 2 VLANs on the fixed > side connected to the edge router).
In your example above, two SSIDs mapped into 2 VLANs on the fixed side connected to the edge router would consistently appear as two links to both WLAN STAs, BSs, and edge router. The edge router can advertize on each of these links a different prefix via a multicast RA sent on the link. All of the WLAN STAs attached to that link (or SSID if you will) will receive the appropriate prefix and be able to complete SLAAC even though they have not sent an RS out. This seems different from the BBF architecture where the edge router can't sent a multicast RA that contains the PIO prior to having received an RS... --julien -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
