From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roland Dreier Subject: Re: When IBoE will be merged to upstream? Date: Tue, 13 Jul 2010 14:20:12 -0700 Message-ID: References: <4C32D0BD.3030902@Voltaire.com> <4C3417FA.7000600@Voltaire.com> <20100711043449.GA31404@obsidianresearch.com> <20100713193828.GB12614@obsidianresearch.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: <20100713193828.GB12614-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> (Jason Gunthorpe's message of "Tue, 13 Jul 2010 13:38:28 -0600") Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jason Gunthorpe Cc: Liran Liss , Or Gerlitz , "Hefty, Sean" , Aleksey Senin , linux-rdma , "monis@voltaire.com" , "alekseys@voltaire.com" , "yiftahs@voltaire.com" , Tziporet Koren , "alexr@voltaire.com" List-Id: linux-rdma@vger.kernel.org > A quibble about multicast - AFAIK this is unsolved. I think some spec > needs to be agreed that documents what sort of multicast snooping > operations switches need to do, ie if IGMP joins imply that IBoE > traffic for the same DMAC is included in the join, or if IBoE requires > a seperate IGMP type process on its own ether-type. That would make it > much clearer what to do with MGIDs. I agree -- the current spec is rather broken for multicast. Choosing a different ethertype and then saying that all switches will just flood multicast traffic is half-baked at best. > It would be nice to at least have a plan on how to integrate a > non-link local address, if that is ever necessary in future. An > extended AH with an additional 48 DMAC field seems reasonable to me? You mean have a next-hop destination + a final destination? Could be done I guess. But I'm not sure how having a routing table where you have to look up 48-bit Ethernet addresses is all that different from just having a standard Ethernet forwarding table. I suppose something based on MAC-in-MAC (a la 802.1ah) could be done but to be honest the IBoE spec that the IBTA came up with looks rather broken for routing. - R. -- Roland Dreier || For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/index.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html