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

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

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

port security

Hi,

Who could verify for me if I am correct. I been looking through cco and cannot confirm this.

My question is how do I disable user ports on CatOS (5k or 6k) from becoming trunking eligible?

If I turn trunking off "set trunk 5/24 off" still sends out DTP packets - correct?

So do you need to "set trunk 5/24 dot1q nonegotiate" which is the only command I found to disable a port from sending out DTP packets - BUT "nonegotiate" will form a trunk if the other end requests it without DTP!

What is the proper way of doing this?

Thank you in advance.....

Uwe

uwe@sbcglobal.net

  • Other Network Infrastructure Subjects
2 REPLIES
New Member

Re: port security

See http://www.cisco.com/warp/customer/473/103.html#dtp

In OFF mode, DTP packets will not be transmitted in steady state. OFF mode is the correct configuration of DTP to prevent a port from becoming a trunk port

New Member

Re: port security

Thank you for your reply!

Uwe

84
Views
0
Helpful
2
Replies