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Posted by Tom Stiller on September 21, 2007, 10:26 pm
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>
> > > > Hi,
> > >
> > > > I'm inquiring about the 4 10-Mbit/s ports on the uBR905 model, and
> > > > if they support full duplex. Isn't that a function of the IOS, and
> > > > not the hardware? Would there be a performance issue if half duplex
> > > > was enabled?
> > >
> > > No, no, no, and no. If you do force whatever is connected to
> > > the other side of that port to full duplex the performance is going to
> > > suck because it will be getting so many errors due to the mis-match. It
> > > is highly unlikely that your cable provider is given you enough bandwith
> > > to even max out a 10Mbit half duplex port anyway.
>
> > Since the UBR905 performs switching functions any, or all, of its LAN
> > side ports can be full-duplex. As for the WAN side, the cable has a
> > separate reverse channel and is naturally full duplex.
>
> > There can be LAN local traffic that could easily max out a 10/100/1000
> > full duplex port, regardless of the speed of the WAn side.
>
> It's got a HUB built into it, not a switch and I think you will
> be hard pressed to find a 10Mbit hub with full duplex support.
My bad. I was mistaken about the switching capability.
[snip]
--
Tom Stiller
PGP fingerprint = 5108 DDB2 9761 EDE5 E7E3 7BDA 71ED 6496 99C0 C7CF
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