Date: Thu, 5 Jul 2007 19:39:45 +0300 From: Nikolay Pavlov <quetzal@zone3000.net> To: Pete French <petefrench@ticketswitch.com> Cc: stable@FreeBSD.org, thompsa@FreeBSD.org Subject: Re: should if_lagg balance outbound traffic on an lacp connection ? Message-ID: <20070705163945.GA38421@zone3000.net> In-Reply-To: <E1I6PlV-0007W1-Rl@dilbert.ticketswitch.com> References: <20070704181903.GA26719@heff.fud.org.nz> <E1I6PlV-0007W1-Rl@dilbert.ticketswitch.com>
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On Thursday, 5 July 2007 at 12:44:53 +0100, Pete French wrote: > > bce1 is a concern here as it is not in the ACTIVE state. On your switch > > have a look at the lacp stats, here is an example from mine with a 4 > > port aggregation. > > I have to admit that I did not setup the switch and have never looked into > this part of the network before. So it's been 24 hours of 'teach yourself > cisco'. But whilst researching the lagg stuff on the net I came across > an OpenBSD thread which says that you can only use lagg's LACP implementation > to aggregate ports connected to the same physical switch. In this case the > networking company who installed the switches have installed a pair, and > each machine has one port connected to each switch. The pair of switches > is allegedly configured to act as a single switch, so I should > just be able to aggregate ports between them. Indeed we have one solitary > windows box connected the same whayy which does this quite happily. But I > do not know if this is possible under FreeBSD > > > c2950#sh lacp neighbor > .... > > Port Flags State Priority Key Key Number State > > Fa0/11 SA bndl 32768 0x1 0x1 0xB 0x3D > > > > As you can see all ports are in 'bndl' state which means they have been negoiated. > > O.K., trying this on each switch I get the following: > > Port Flags Priority Dev ID Age Key Number State > Gi0/2 SA 32768 0019.bb24.0422 25s 0x90 0x1 0x3D > > and > > Port Flags Priority Dev ID Age Key Number State > Gi0/2 SA 32768 0019.bb24.0422 23s 0x90 0x2 0x3D > > So I dont have your first 'State' column in the output! But I do have the > final one (is the first one simply an english readable alterantive to > the hex?). So my ports are in 0x3D as are yours. > > > And all ports here are ACTIVE. I have been meaning to add IOCTLS to > > display more lacp stats to help debug this sort of thing. > > I still only have one ACTIVE port. I am going to try using 'failover' > mode on lagg instead, but it is a shame :-( Do you think this has anything > to do with this being two switches ? > > Thanks for the help, > > -pcf. Try to use fec mode and EtherChannel(on Cisco side) because there is no any special protocol requirments like it is for lacp case. Here is an example on Cisco side: interface GigabitEthernet2/3 description Goes to 2/7 of ServerIron 400 switchport access vlan 55 switchport mode access logging event link-status load-interval 30 speed 1000 no qos channel-group 1 mode on ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ! interface GigabitEthernet2/4 description Goes to 2/8 of ServerIron 400 switchport access vlan 55 switchport mode access logging event link-status load-interval 30 speed 1000 no qos channel-group 1 mode on ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -- ====================================================================== - Best regards, Nikolay Pavlov. <<<----------------------------------- ======================================================================
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