In my environment I have multiple VLANs and a switching fabric. I would like to start using IP telephony with IP phones ofcourse. Do I need to add a new VLAN? Based on what do I need to priotrize traffic in my switching fabric, and how?
It is definitely recommended to deploy separate VLAN for Voice. Switche at the back of CISCO IP Handsets will support native data VLAN for computer connected at the back and will assign different internal queues for Data and Voice packets. So your LAN switches should support on the port basis 2 VLANs: Data VLAn as Native VLAN and AUX VLAN - voice VLAN.
If you run non-CISCO switches, consult vendor on this.
You need to face the challenge of enabling Voice VLAN on all your LAN switches.
Prioritization may be done using IP CoS 5 for voice bearer channel and IP CoS 3 for IP Telephony signaling. Just reassign traffic to different queues based on CoS values on the switches (to be honestly you do not have any other option if you run CISCO switches). IP Handset will built Voice Packets and set IP CoS accordingly.
If you are using CISCO switches it is not trunking.
Switch ports still belong to Native Data VLAN only. But there is auxiliary VLAN which should be enabled on every port so when IP Phone plugged in switch will recognize it and will start supporting in addition to Data VLAN also Voice VLAN.
In regards Trunking, make sure your Voice VLAN is advertised in switches where you have connected IP Phones, which I presume you will enable by default.
If you are using other than CISCO switches you need to consult vendor on support of Voice and Data VLANs on the same port.
I'd suggest deploying a voice vlan for a few reasons.
First is, it allows you to create a separate, more secure environment for your telephony devices. By segmenting the traffic you are limiting broadcast traffic, reducing the possibility of sniffing voice conversations, creating a different way to manage your address utilization for telephony, and protect against rogue DHCP servers.
Secondly, you create a clear trust boundary. By having a data and voice vlan deployed to each closet, you can blindly trust the voice vlan and do classification on the data vlan. It greatly simplifies a QoS deployment to have that clear demarc for each environment.
I would suggest you define a clear QoS architecture. Determine what types of traffic you wish to group together and what actions you want performed against them. For some enterprises it would be 3 classes, others choose 11 or 15. Determine the impact of adding additional classes (operational cost of deployment, technical limitation of 3 bits within CoS or MPLS EXP field, etc). Then create a design to achieve your architecture.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
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