Cisco 4500 - No duplex command?

I have a Cisco 4500 router in an office. I received a warning from my Aironet device that the duplex set on the Cisco 4500 was set to half. (Duplex mismatch) I checked the interface and it says it is in half-duplexing mode. (Show Interface Ethernet 0 displayed this. Show Run did not display the duplexing information.) I wanted to change the Cisco 4500 to Full-Duplex on Ethernet 1. However when I go to the interface, the duplex command is unavailable. (The Cisco 4500 is connected to a switch) The IOS is Ver. 12.0(7).

Any ideas why I cannot change the duplexing mode?

(I'll have to check out what ethernet module is installed into the device. I am currently off site, so I cannot tell you yet)
EE_BattousaiAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

lrmooreCommented:
I don't believe the old 4500 router supports full-duplex at all unless you have the NP-2E-FDX module. Even then it is only 10Mb



0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
mikebernhardtCommented:
lrmoore is correct. Best to set the AP to half or "auto."
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Routers

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.