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switchport comparision, "trunk native vlan" versus "access vlan"

I want to understand the logic when I install IP phone with PC attached. Is there any difference between two configurations. for exmaple, consideration to handle QoS.

switchport access vlan 100

switchport voice vlan 200

versus

switchport trunk encapsulation dot1q

switchport trunk native vlan 100

switchport voice vlan 200

switchport mode trunk

Thanks in adance,

2 REPLIES
Silver

Re: switchport comparision, "trunk native vlan" versus "access v

The difference is that these applies to two different set of switches.

The first set of configuration applies to the new series switches, Cisco 3550, 3560, 3750 series.

The second set applies to the olders series Cisco 2900, Cisco 3500XL etc. In these switches, you need to configure the port as a trunk before the port can take both voice and data vlan.

In the newer series, the port can take both voice and data vlan and still not run in trunk mode.

Regards,

Anup

New Member

Re: switchport comparision, "trunk native vlan" versus "access v

Nevertheless, i believe that the encapsulation is dot1q, and we've got two vlan going through the same interface ... which is not that far from a really basic trunk definition. So can we really say that's not running in trunk mode ?

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