Hey Terry,

You are correct -- switchport protected is local only.  Additionally, it is 
only relevant to L2 hence "switchport" in the command. Making the port L3 by 
definition means "no switchport" right? So switchport commands have no relevance


------Original Message------
From: Terry Vinson
Sender: [email protected]
To: CCIE OSL
Subject: [OSL | CCIE_RS] Lab 2.25 WB1 Ver11
Sent: Jul 11, 2009 9:33 PM

Hi guys,

I have a question regarding lab 2.25.  In the task we are asked to put 
Fa0/12-13 on cat3 and cat4 in vlan 90.  Furthermore we are instructed to 
configure switchport protected on all four ports.

I thought that "switchport protected" was only local to users in a vlan 
on a single switch.  Though we are not instructed to do so specifically 
in the question the PG has us allow vlan 90 on the trunk.

It was my understand that if you split users up on two switches that are 
trunking the protection does not span across switches.  (ie users in the 
protected vlan on an individual switch would not be able to communicate 
to each other but can communicate to users in the same vlan on the other 
switch via the trunk.)  Is this thinking wrong, it seems to work this 
way when I lab it up?

I also have another question:  When using switch port protected the 
"protection" is limited to layer 2, if the frame becomes a packet at 
layer 3 will it be allowed to communicate?  And if so is that 
functionality actually different with Private Vlans?

Sorry if I'm showing my ignorance here, but after this many hours of 
studying things get a little fuzzy for me.

Thanks,
Terry

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Regards,

Joe Astorino 
CCIE #24347 (R&S)
Sr. Support Engineer – IPexpert, Inc.
URL: http://www.IPexpert.com
 
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For more information regarding industry leading CCIE Lab training, please visit 
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