4500 no port-security command

[kmichon]

I have do following switch:

3Com Corporation


SuperStack 3 Switch 4500 26-Port Software Version 3Com OS V3.02.00s56


Copyright(C) 2003-2005 3Com Corporation.  All Rights Reserved.


SuperStack 3 Switch 4500 26-Port with 1 MIPS Processor


64M     bytes DRAM


8196K   bytes Flash Memory


Config Register points to FLASH

CPLD Version is CPLD 003


Bootrom Version is 1.01


24 FE + 4 GE Hardware Version is 00.00.00

In the paper "3Com Stackable Switch Family. Advanced Configuration Guide. 3Com Switch 4500"  there is configuration procedure to enable port security. However, after command:

<Switch> system-view

I can't type command:

port-security enable

There is no port-security command!

I have 802.1x and MAC authentication globally disabled.

Please help me what is the reason?