[cisco-voip] Added config lines to 3560POE

[Luan Nguyen]

A little more information on how to connect a Cisco phone to a switch:
http://www.cisco.com/en/US/products/hw/switches/ps4324/products_configuratio
n_example09186a0080722cdb.shtml

 

"switchport mode dynamic desirable" command makes the port actively attempt
to become a trunk link.  This is the default configuration for ports on
older switches like 3550, 2950.etc.  For 3560, the default is "switchport
mode dynamic auto".  

Best security practice is to put unused ports into access mode and shut them
down.

 

 

Luan Nguyen

Chesapeake NetCraftsmen, LLC.

 <http://www.netcraftsmen.net/> www.NetCraftsmen.net

 

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ryan West
Sent: Monday, October 20, 2008 3:10 PM
To: David Zhars; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Added config lines to 3560POE

 

David,

 

If they are cisco phones, you probably don't need that.  Encaps of dot1q is
pretty standard for a trunk port, but typically you configure switchport
host and switchport voice vlan for Cisco phones.

 

-ryan

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of David Zhars
Sent: Monday, October 20, 2008 3:07 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Added config lines to 3560POE

 

I had an "expert" come in last week and fix some minor issues on our
network.

He added this line to the ports on my 3560POEs.  These ports support a phone
and PC:

switchport trunk encapsulation dot1q













 
 

Any idea why he would have added that line?  What does it do?  Any harm?

On another switch, he added that line and 

switchport mode dynamic desirable













 







to the ports.  Again, these ports (most of them are actually unused, it's a
small network) will only have a phone, or at best,






a phone with a PC hanging off them.




















 
What do you think?

 

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