Hi in my access point i am unable to change wired 0 duplex setting

[IMG USA]

in my access point i am unable to change wired 0 duplex setting, Can anyone help me with command line. 

[marce1000]

 - The AP will follow and or 'listen to' switch settings ; which is sufficient , 

 M.

[IMG USA]

At Ap end i Can its learning Half duplex but at switch end i have configured hardcoded Full duplex.

If i connect different AP on same port then i can see at other AP full duplex.

[Leo Laohoo]

Is this AP a 2800/3800/4800/1560? 

There is a known bug with 2800/3800/4800/1560 about unable to negotiate duplex settings with the switch.  As a consequence, the switch's logs will be spammed with duplex mismatch error. 

The fix is to upgrade the WLC firmware to something more recent.

[IMG USA]

to which Firmware should we upgrade WLC

[Leo Laohoo]

---

@IMG USA wrote:
to which Firmware should we upgrade WLC

---

Whatever is more recent.

[IMG USA]

But with Same version another AP of same make is getting full duplex

[marce1000]

            - Try cold start (from powered down) of the AP , 

 M.

[Leo Laohoo]

What firmware is the controller running on?

[Rich R]

- What model of AP?
- What version of software?

But regardless of that - you should not be trying to set the speed and duplex on the AP! You should be setting the switch port to match the AP with auto speed and auto duplex.  Hard-coding the switch port while the AP is set to auto is an unsupported configuration and the resulting half duplex is a known side effect of that unsupported configuration (it's pure luck if another device works) - you can find plenty of documentation on that which has been around for decades! Both sides must be auto or both sides must be hard-coded.
https://www.cisco.com/c/en/us/support/docs/lan-switching/ethernet/10561-3.html