your commands will work fine. The answer to your why? question is because
the interfaces don't negotiate duplexing consistently. You'd be wise to fix
the duplex setting to full on the switch AND the router to prevent any
future conflicts. Also, to prevent any speed conflicts, fix the speed for
the switch port and the router interface to 100Mbps, too.
The autonegotiation on the switch is there for folks who don't want to be
bothered with configuring their equipment - plug and pray ;-) On the
router, there's really no excuse for not setting the interface speed and
duplex mode, since you minimally have to configure the IP address and unshut
the interface anyway.
----- Original Message -----
From: Keith Woodworth <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, March 28, 2001 8:26 PM
Subject: Duplex settings 2900XL -> 7206
>
> Have a question for duplex settings.
>
> Just trouble shooting some transient errors that seem to pop up once in a
> while and was going over port settings and came across something.
>
> We have a FastE port on a 7206 connected to a 2900XL. The 2900 port is
> config'd as:
>
> Auto-duplex (Half), Auto Speed (100), 100BaseTX/FX
>
> and the console log on the 2900 shows:
>
> 5w3d: %LINK-4-ERROR: FastEthernet0/24 is experiencing errors
>
> which is the port the 7206 is on.
>
> But on the 7206 the port is config'd as:
>
> Full-duplex, 100Mb/s, 100BaseTX/FX
>
> Why would the switch only go half duplex and the router go full? And would
> the commands like this on the 2900 fix this:
>
> conf t
> int faste 0/24
> duplex full
> ^Z
>
> This would force the port on the 2900 to go full duplex but the (auto 100)
> would be there. Would be better to force the 100 as well and not have it
> do auto speed negotiation?
>
> Funny thing is we have a 2900 out of the box plugged into another faste
> port on the 7206 and it comes up right. (100/full in auto mode)
>
> Thanks,
> Keith
>
>
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