Cisco Voice VLan

145 pts.
Tags:
CCVP
Unified Communications
VLAN
Voice services
Voice VLAN
VoIP
Hi Can any one please explan me about Vocie Vlan.

Software/Hardware used:
CISCO

Answer Wiki

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The basic concept of VLAN for VoIP is that you dedicate a seperate VLAN with a seperate subnet for Voice traffic. This keeps contention between data and voice to a minimum, and is easier to manage than a bunch of Quality of Service QOS rules on internal routers and switches.

A great resource from Cisco can be found at:

http://www.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_9_ea1/configuration/guide/swvoip.pdf

Here is an excerpt:

These are the voice VLAN configuration guidelines:
• You should configure voice VLAN on access ports.
• The Port Fast feature is automatically enabled when voice VLAN is configured. When you disable
voice VLAN, the Port Fast feature is not automatically disabled.
• If you enable port security on a voice VLAN port and if there is a PC connected to the IP phone, you
should set the maximum allowed secure addresses on the port to more than 1.
• You cannot configure static secure MAC addresses in the voice VLAN.
• Voice VLAN ports can also be these port types:
– Dynamic access port. See the “Configuring Dynamic Access Ports on VMPS Clients” section
on page 13-34 for more information.
– Secure port. See the “Enabling Port Security” section on page 17-5 for more information.
– 802.1X authenticated port. See the “Enabling 802.1X Authentication” section on page 8-8 for
more information.
– Protected port. See the “Configuring Protected Ports” section on page 17-3 for more
information.

hope that helps

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  • ITKE
    Heres a good blog post that would do better than me explaining
    344,850 pointsBadges:
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