[c-nsp] half duplex question

John Brown john at citylinkfiber.com
Wed Aug 3 14:56:38 EDT 2011


Ewwwhhh   ickie

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Nick Hilliard
> Sent: Wednesday, August 03, 2011 12:50 PM
> To: Chris Adams; cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] half duplex question
> 
> On 03/08/2011 18:25, Chris Adams wrote:
> > 10Mbps/half-duplex is not the same as 5Mbps/full-duplex.  In my
> > experience, 10Mbps/half-duplex will be able to get about 3Mbps
> > throughput before collisions bog everything down.
> 
> this brings up horrible memories of having to connect two routers together
> using 2 x 10M half-duplex links and using ospf weighting to get TX running
> down one link and RX down the other.  I.e. synthesised virtual 10M full
> duplex.  Ghetto, but when there's no budget to buy more routing gear...
> 
> Nick
> 
> 
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