Re: Router speeds...

[Roland Dobbins <rdobbins () cisco com>]

I missed the comment that the -wired- interface was slow, good catch!

Yes, a duplex mismatch would be the first thing to check, in this event.


On Nov 25, 2005, at 10:22 PM, Chris Buechler wrote:

> Dr. Neal Krawetz wrote:
>
> > So my question is, are all wireless routers slow?
> > I know that wireless is slower than wired, but why should having a
> > wireless router slow down the wired connection?
>
> Since wired is slow as well, I would guess it's the number one  
> problem you typically run into with wired performance issues - a  
> duplex mismatch.  Almost certainly on the WAN interface, between it  
> and your cable/DSL modem or whatever the routers are plugged into.
> Can't say I'm really familiar with Linksys or Netgear stuff, but  
> there should be some sort of status page that shows the speed and  
> duplex of the interface, and hopefully errors on the interface.  If  
> it's on full duplex and you're seeing collisions, or if you see  
> late collisions on a half duplex interface, you have a duplex  
> mismatch.  First upgrade the firmware on everything involved that  
> you can.  Then, assuming the device the Linksys/Netgear is plugged  
> into is "dumb", i.e. no management capabilities internally and no  
> ability to upgrade the firmware, I'd force the Linksys to whatever  
> speed and duplex works with the other end.  If the modem has a  
> management interface, then I'd first suggest upgrading the  
> firmware, and then seeing what speed/duplex it has configured.
> If you can get into a management interface on both sides, either  
> set both to the same speed and duplex, or set them both to auto.   
> Never set one side and leave the other on auto, as that's the  
> easiest way to cause a mismatch.  If you can't manage the other  
> end, that sometimes leaves you in a situation where you have to  
> muck with settings on only one side.
>
> -Chris
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Roland Dobbins <rdobbins () cisco com> // 408.527.6376 voice

 Algorithm agility is an essential feature in any Internet protocol.

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