The Long and Winding Road wrote:
> 
> ""John Tafasi""  wrote in message
> news:200211141056.KAA04663@;groupstudy.com...
> > Hi,
> >
> > I have a cisco 2516 router with an ethernet interface. How
> can I find out
> if
> > this inteface is full duplex or half duplex?
> 
> plug it into a full duplex 100 mbs switch port and see if link
> occurs?
> 
> seriously, I believe all routers in the 25xx line are 10/half.
> 
> there is no report on speed and duplex on routers that I can
> find. show int
> on a switch gives you a status
> 
> Encapsulation ARPA, loopback not set
>   Keepalive set (10 sec)
>   Auto-duplex, Auto-speed
> 
> even on a router with a port that do duplex changes ( 3640
> NM-4E )there is
> no status.
> 
Interesting - I'd never twigged to this.  A FastEthernet port certainly
gives this information

  Full-duplex, 100Mb/s, 100BaseTX/FX

but an ethernet port on the same router (a 3600) doesn't show it.
I'd guess that the code for 'show ethernet' on the routers that do support
full-duplex comes straight from the routers that don't support it ;-)

> I don't have access to a router with a port that permits speed
> and duplex
> changes.so I can't compare.
> 
> 
> 
> >
> >
> > Thanks
> 
> 




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