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CISCO 2503 Router ethernet 0 Full Duplex?

CISCO 2503 Router

I get a message in cisco 2503 router every few seconds "duplex mismatch discovered on Ethernet0 (not full duplex), with Router
EU FastEthernet0/0 (full duplex)."

How do I change this to be full duplex? What is the command?

Thanks

RPPreacher

#conf t
(config)#interf fa0/0
(config-if)#duplex full
(config-if)#exit
(config)#exit
#write mem

shiplu44

ASKER

Router2503(config-if)#duplex full
^
% Invalid input detected at '^' marker.

Router2503(config-if)#

shiplu44

ASKER

It doesn't recognize DUPLEX as a command

RPPreacher

Are you certain this is a fast ethernet interface and not ethernet?

ethernet is 10 half only.

shiplu44

ASKER

Router2503#show ip int brief
Interface IP-Address OK? Method Status Protocol
BRI0 unassigned YES NVRAM up up
BRI0:1 unassigned YES unset down down
BRI0:2 unassigned YES unset down down
Ethernet0 10.12.29.79 YES NVRAM up up
Serial0 unassigned YES NVRAM down down
Serial1 unassigned YES NVRAM down down
Router2503#

RPPreacher

The error message says "Ethernet0" not FastEthernet0

shiplu44

ASKER

If so then how do I disable that message from appearing on the screen every few seconds?

RPPreacher

Ethernet0 is not a fast ethernet port.

Ethernet ports are half duplex only.

ASKER CERTIFIED SOLUTION

RPPreacher

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