Date: Sun, 16 May 1999 12:01:49 +0200 From: Bernd Walter <ticso@cicely.de> To: Steve Rubin <ser@tch.org> Cc: John Milford <jwm@CSUA.Berkeley.EDU>, hackers@FreeBSD.ORG Subject: Re: ifconfig: changing mac address Message-ID: <19990516120149.B48820@cicely8.cicely.de> In-Reply-To: <19990515002636.A28747@tch.org>; from Steve Rubin on Sat, May 15, 1999 at 12:26:37AM -0700 References: <ser@tch.org> <199905150328.UAA27064@soda.CSUA.Berkeley.EDU> <19990515002636.A28747@tch.org>
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On Sat, May 15, 1999 at 12:26:37AM -0700, Steve Rubin wrote: > This is not how Etherchannel works. Anyone from cisco here care to explain > better than I possibly could? > > On Fri, May 14, 1999 at 08:28:55PM -0700, John Milford wrote: > > > > You have to have the capibility on the switch, and enable it > > first. It is called EtherChannel by Cisco, and it is 2 or 4 ports > > that all have the same MAC addr plugged into the switch, and the > > switch treats them as one interface. > > Yes Etherchannel uses some other mechanism to balance the load. There's another protocol available (from HP I think) which is able to increase the bandwidth with MAC-Addresses. All interfaces send their data with the same sender-MAC and only one interface is used to receive data. There is only an increase on sending data which is good for fileservers. On the receiving side the other interfaces are only used for standby reasons. > > > > Steve Rubin <ser@tch.org> wrote: > > > > > > > > > > You need a switch to do this. If your clients are on the same ethernet as > > > > your server, they can only talk to one MAC address. That means you only ge > > t > > > > the bandwidth of one interface. If you have a switch that can bond ports > > > > together, you can use both cards at the same time, transparently to everybo > > dy > > > > but the driver and the switch. I know that NetWare supports this, as do so > > me > > > > Bay switch, and surely some Cisco stuff. > > > > > > > > > > Having 2 ethernet cards with the same mac address on two different ports > > > of all the cisco switches I have used (1100-6500) will confuse the hell > > > out of them :). I've seen it happen. > > > I asume they will disable all "redundance" ports as long as the first one with the MAC-Address in question is active with that MAC. -- B.Walter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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