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we hard-code native vlan tagging:

vlan dot1q tag native

then we configure a port like this:

interface FastEthernet0/1
switchport access vlan 20
switchport mode access
switchport voice vlan 500
mls qos trust cos
spanning-tree portfast

Does this cause problem? I mean second configuration assumes that there are two vlans:

  1. native vlan which is untagged (but here it is tagged)
  2. voice vlan
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1 Answer

up vote 2 down vote accepted

I asked this question in networking-forum and they told:

No, the IOS doesn't consider the voice/access port a trunk port.

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Good info - thanks for sharing! –  Shane Madden Dec 27 '11 at 23:02
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