> Date: Fri, 4 Feb 2000 23:06:42 -0500 (EST)
> From: Tony Tauber <ttauber@bbnplanet.com>
> To: "Rubens Kuhl Jr." <rkuhljr@uol.com.br>
> Cc: cisco-nsp@puck.nether.net, jared@puck.nether.net
> Subject: Re: [nsp] Half-duplex 10BASE-T interfaces of a Cisco 4x00
>
> On Fri, 4 Feb 2000, Rubens Kuhl Jr. wrote:
>
> >
> > Hi.
> >
> > Does someone know a trick in order to make use of the 2 half-duplex Ethernet
> > interfaces of a Cisco 4000 (or any other 4x00) in the same subnet ? A single
> > half-duplex interface can barely forward and receive 4 Mbps of full-duplex
> > traffic, and I'm trying to figure out a way to activate the other
> > half-duplex interface on the same subnet to share the load. Input by one
> > interface and output by the other is one ideia, but any load-sharing
> > mechanism is wellcome.
>
> I think what you might be thinking of is "simplex ethernet". See:
>
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/cbook/cip.htm#xtocid1051754
Note that if you're talking into a switch, you may also have to fix a
mac address on the receive-only port, since if there is no output traffic
most switches will time it out and either drop packets destined to that
port or flood them over all ports.
There are a number of other ways to do this with static routes or active
routing protocols, it can take some fiddling to get it right and avoid
problems with arp processing, especiallly if you want both ports to be
on the same subnet and network.
George
This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:09 EDT