Simple question. I do not want any UNTAGGED packets to traverse my trunk
ports..

Some on this list have said to assign the native vlan to an unused vlan,
but I don't even want to do that.

I want ALL untagged packets on trunks to be dropped... 

Possible?

This is one of my interfaces right now:

Cat6500/Sup720-3b 12.2(18)SXF12

!
interface GigabitEthernet9/3
 description ISG1000-1 Untrust
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 3
 switchport mode trunk
 switchport nonegotiate
 no ip address
 speed 1000
 duplex full
 no cdp enable




Brandon Price
Sterling Communications Inc.
 
/31 <--- The Subnet Formally Known as "Unusable"
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