Port Security With Dynamic Desirable Port

[Ali Hazim]

Hi,
Why Can't Port-Security Be Configured On a Dynamic Desirable Interface (Default), Why Must The Interface Be Configured As Access Or Trunk, I Can't See The Relation Between Port-Security And VLAN, Shouldn't I Be Able To Configure Port-Security Without Changing The Default VLAN Configuration Of an Interface?
Thank You In Advance.

[marce1000]

 So , which error are you getting when you try this ?
 M.

[Ali Hazim]

This Is The Error I'm Getting, Also This Is Mentioned In Cisco's Official Get Cert And All Over The Internet, But I Haven't Seen Any Explanation To Why It's Rejected.

[marce1000]

Ref : https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/31sg/configuration/guide/conf/port_sec.pdf

>...

 Step 2 Switch(config-if)# switchport mode access Sets the interface mode.
Note An interface in the default mode (dynamic
desirable) cannot be configured as a secure port

M.

[Ali Hazim]

Thanks For Your Reply, But This Is What Confuses Me, Why a Dynamic Desirable Interface Be Configured With Port Security?