[c-nsp] [Slightly OT]: Silly Question

[Wil Schultz]

On Feb 9, 2011, at 3:00 PM, Jerry Bacon wrote:

> On 2/9/2011 2:46 PM, Wil Schultz wrote:
>> You're going to want to use sub-interfaces for both VLAN's, use "router on a stick" as your google-fu keywords.
>> 
>> 
>> On Feb 9, 2011, at 2:28 PM, Tim Donahue wrote:
>>> interface gigabitEthernet 0/0
>>>  ip address 10.1.10.1 255.255.255.0
>>> !
>>> interface gigabitEthernet 0/0.20
>>>  encapsulation dot1q 20
>>>  ip address 10.1.20.1 255.255.255.0
> 
> I don't know about the 3845 specifically, but every Cisco router that I have worked with that does support sub-interfaces will work just fine with the above configuration. The gi0/0 will be the native VLAN and gi0/0.20 will be a tagged VLAN.
> 
> -- 
> Jerry Bacon
> Senior Network Engineer

The native vlan configurations changed in 12.1(3)T. Notice the differences in the two examples in the link below.

http://www.cisco.com/en/US/products/hw/switches/ps663/products_configuration_example09186a008014859e.shtml#configs  ( 12.1(3)T and above)
http://www.cisco.com/en/US/products/hw/switches/ps663/products_configuration_example09186a008014859e.shtml#earlier  ( below 12.1(3)T)

-wil