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New Member

IP Addressing with IP Phones and attached PC's

Can someone point me in the right direction with regards IP Addressing and IP Telephony? Scenario: IP Device (PC) attached to an IP Phone attached to a Catalyst Switch. Question. Do I have two IP and MAC addresses assigned to a single port on the Switch and how can I distinguish which one is the Phone or the PC? A URL explaining would be useful if possible.

3 REPLIES
New Member

Re: IP Addressing with IP Phones and attached PC's

When you daisy chain a pc off the IP phone switch, the phone's connection back to the switch is a 802.1q trunk, therefore the pc is on one subnet and the phone is on another. When you configure the port you enable trunking and set the native vlan # (data) and voice vlan #

this should get you started in the right direction

http://www.cisco.com/en/US/products/hw/switches/ps628/products_configuration_guide_chapter09186a00800d84c0.html

New Member

Re: IP Addressing with IP Phones and attached PC's

Are these steps the same for a 3524?

Also - in the documenation I notice it allows for classification by P or Q tags - is there a prefered approach if we the customer have none?

- ken

New Member

Re: IP Addressing with IP Phones and attached PC's

To explain I can give you an example:

2 Vlans:

One for Data (PC) and one for Voice (IP Phone & Call Manager), in this ex.

VLan for Data: VLAN 3 - network 10.10.25.0 mask 255.255.255.0

VLan for Voice:VLAN 2 - network 10.10.60.0 mask 255.255.255.0

Catalyst switch with IOS, ex 3524 PWR

Interface connect to IP phone

interface FastEthernet0/2

switchport trunk encapsulation dot1q

switchport trunk native vlan 3

switchport mode trunk

switchport voice vlan 2

switchport priority extend trust

Then you have to connect this switch to a sw Layer 3 or router. I can explain how to do it if you want.

MP

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