Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

How do I set my 6509 catalyst switch port to full duplex?

I have a Catalyst 6509 with MSFC2. I am trying to set port 4/48 to be no-negotiate and full duplex. But I can't. Here are the commands I entered:

Campus_Catalyst> (enable) set port duplex 4/48 full

Port 4/48 is in auto-sensing mode.

So...I then tried to disable the negotiation with this command and the error is as follow:

Campus_Catalyst> (enable) set port negotiation 4/48 disable

Feature not supported on Port 4/48.

What am I doing wrong? Here is the CatOS version I am running.

WS-C6509 Software, Version NmpSW: 6.3(3)

Copyright (c) 1995-2001 by Cisco Systems

NMP S/W compiled on Oct 29 2001, 16:50:33

System Bootstrap Version: 5.3(1)

Hardware Version: 3.0 Model: WS-C6509 Serial #: TBA05310587

PS1 Module: WS-CAC-1300W Serial #: SON05090480

PS2 Module: WS-CAC-1300W Serial #: SON04526445

Mod Port Model Serial # Versions

--- ---- ------------------- ----------- --------------------------------------

1 2 WS-X6K-SUP1A-2GE SAD0531014J Hw : 7.0

Fw : 5.3(1)

Fw1: 5.4(2)

Sw : 6.3(3)

Sw1: 6.3(3)

WS-F6K-PFC SAD052905JG Hw : 1.1

2 2 WS-X6K-SUP1A-2GE SAD04320MUV Hw : 3.4

Fw : 5.3(1)

Fw1: 5.1(1)CSX

Sw : 6.3(3)


Re: How do I set my 6509 catalyst switch port to full duplex?

The set port negotiation command is supported on Gigabit Ethernet ports only, except on WS-X6316-GE-TX and on WS-X6516-GE-TX.

If the port does not support this command, this message appears:

Feature not supported on Port N/N.

In most cases, when you enable link negotiation, the system autonegotiates flow control, duplex mode, and remote fault information. The exception applies to 16-port 10/100/1000BASE-T Ethernet modules; when you enable link negotiation on these Ethernet modules, the system autonegotiates flow control only.

You must either enable or disable link negotiation on both ends of the link. Both ends of the link must be set to the same value or the link cannot connect.


New Member

Re: How do I set my 6509 catalyst switch port to full duplex?

Command correct. But set port speed first

set port speed 4/48 (speed)

Then set your duplex .