[cisco-voip] Switch port configs

[Bill]

The power output on the 3550 is pre standard POE power.

 


Power Options

The Cisco Unified IP Phone 7961G-GE supports IEEE 803.af Power over Ethernet
(PoE). It also can be powered locally with a power supply (part number
CP-PWR-CUBE-3). Note: The Cisco Unified IP Phone 7961G-GE does not support
Cisco Pre-standard PoE.

 

 

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/phones/ps379/ps651
2/product_data_sheet0900aecd802ff030.html

 

 

 

  _____  

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Cristobal Priego
Sent: Tuesday, October 12, 2010 10:16 AM
To: Jason Aarons (US)
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Switch port configs

 

while talking about the 3550s 

I have a weird issue

I have a 7961G-GE and a 7962 that won't work if i plug them in to the 3550,
however if I plug them in to a 3560 they work pretty well

 

any ideas of why this could be happening ?

 

I upgraded the ios to the latest available. but i just can't get this 2
phones to properly work and register to my ucm

 

thanks

2010/10/11 Jason Aarons (US) <jason.aarons at us.didata.com>

Third party phones can use LLDP-MED.  Avaya phones can get the voice vlan
via dhcp on the data vlan and reboot into voice vlan.  You should always
avoid having end user ports being trunks, by default trunk mode would pass
all vlans into the phone, creates potential spanning tree issues, etc.

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Shine Joseph
Sent: Monday, October 11, 2010 5:41 PM
To: Scott Voll; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Switch port configs

 

If you are connecting a non-Cisco IP phone to a switch, you will need to
configure the port as trunk. As Cisco phones/switches uses CDP to work out
voice VLAN trunk configuration is not required, though it works well. Due to
the management overhead and the security concerns this configuration is not
recommended.

 

When configured with the second option, the switch port gets configured as
trunk, internally, but allows only two VLANs - Voice VLAN and the access
VLAN.

 

HTH

 

Cheers,

Shine

 

 

e the port as

From: Scott Voll <mailto:svoll.voip at gmail.com>  

Sent: Tuesday, October 12, 2010 1:10 AM

To: cisco-voip at puck.nether.net 

Subject: [cisco-voip] Switch port configs

 

is there anything wrong with having your switch ports configured as follows?


 

 switchport trunk encapsulation dot1q

 switchport trunk native vlan 14

 switchport mode trunk

 switchport voice vlan 146

 

Normally I would have them set like:

 

switchport access vlan 14

switchport voice vlan 146

 

These are 3560's running 12.2 code.

 

TIA

 

Scott

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