VLAN1 tagged on trunk?

Discussion in 'Cisco' started by Steffen M. Steck, Feb 13, 2006.

  1. Hi everybody,
    I have a port channel on a C4509 configured as trunk:
    interface Port-channel5
    switchport trunk encapsulation dot1q
    switchport mode trunk
    All vlans work correct on the other side of the channel besides vlan 1.
    The other side is a vmware ESX machine with a virtual switch inside,
    which seems to need vlan 1 tagged over the trunk. Can someone give me a
    hint how to config this?
    Steffen M. Steck, Feb 13, 2006
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  2. vlan dot1q tag native
    Tomasz Paszkowski, Feb 13, 2006
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  3. Steffen M. Steck

    Scott Lowe Guest

    I ran into this very issue myself not more than a couple of days ago.
    Can you elaborate (or anyone, for that matter) on the implications of
    tagging VLAN 1 traffic using this command? Does that mean that all
    untagged traffic is dropped?

    Scott Lowe, Apr 20, 2006
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