On Wed, Sep 17, 2008 at 11:25 PM, Martin Siegert <[EMAIL PROTECTED]> wrote:
> It is my understanding that 802.3ad forbids what you want to do: > running a single stream over more than one link; 802.3ad requires > that all packets are guaranteed to be delivered in order. Yes, you are probably right Martin. I didn't know much about the 802.3ad at all until very recently. But the iffy point seems to be the definition of a "single stream" Does it mean "all traffic from a computer" or "all traffic from one process" or "all traffic from one protocol" I guess that's the crucial question for my need right now. > This does not mean that you cannot do what you want: you need to use > round-robin mode (which AFAIK is still the default under Linux; > easy to test with crossover cables). Sure; mode_rr is always around. [I didn't get the test with the crossover cable though, sorry, could you explain perhaps? I'm not at all a networking guy ] > - most switch vendors do not support round robin mode - the only one > that I know who does is Extreme (please correct me!). That brings me to the other question though? Does mode_rr "need" switch-support? (ah! perhaps you mean I'll get assymetricity? Transmit side load balancing but no receive side load balancing because the switch will insist on sending all packets to a machine over a single port. Unless my machine answered ARP requests from different machines with alternate MACs of its cards and thus fools the switch into. But I guess that's what mode=6 does! So I'm not even sure how that is different from mode_rr. I'm sorry I'm confused again! ) Aren't many of the modes designed to operate inspite of an ignorant switch? I'm never sure which ones though! > You can get around that problem by using a separate switch for each > leg, but that requires that each host has the same number of interfaces > for that bonded network. E.g., you cannot have a host with a single > 10GigE card and another host with 4 1GigE cards. > Ah! True. I do have two switches here and each of my nodes have two eth cards. So I guess I could do that too. -- Rahul _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
