From: Marvin Greenlee (marvingreenlee@yahoo.com)
Date: Mon Aug 09 2004 - 01:58:49 GMT-3
The "n" means that the encapsulation was negotiated.
Here is the output from two connected switches,
including relevant configuration. On Cat1, the
trunking configuration is set to the default of
negotiation, where Cat2 is hard coded with trunk
encapsulation:
CAT1:
interface FastEthernet0/21
switchport trunk native vlan 20
switchport mode dynamic desirable
Cat1#show int trunk
Port Mode Encapsulation Status
Native vlan
Fa0/21 desirable n-802.1q trunking
20
Port Vlans allowed on trunk
Fa0/21 1-4094
Port Vlans allowed and active in management
domain
Fa0/21 1,10,20,30,40,50
Port Vlans in spanning tree forwarding state
and not pruned
Fa0/21 1,10,20,30,40,50
***********************
CAT2:
interface FastEthernet0/21
switchport trunk encapsulation dot1q
switchport trunk native vlan 20
switchport mode trunk
!
Cat2#show int trunk
Port Mode Encapsulation Status
Native vlan
Fa0/21 on 802.1q trunking
20
Port Vlans allowed on trunk
Fa0/21 1-4094
Port Vlans allowed and active in management
domain
Fa0/21 1,10,20,30,40,50
Port Vlans in spanning tree forwarding state
and not pruned
Fa0/21 none
Cat2#
Marvin Greenlee
Network Learning, Inc
www.ccbootcamp.com
marvin@ccbootcamp.com
--- Tom Young <gitsyoung@yahoo.co.jp> wrote:
> Hi,group
>
> When I take the show interface trunk command on
> the
> switch, I saw the encapsulation of the interface was
> n-802.1q, what is means ?
>
> Thanks alot
>
>
> #show interfaces trunk
>
> Port Mode Encapsulation Status
>
> Native vlan
> Po1 on 802.1q trunking
> 1
> Po2 auto n-802.1q trunking
> 1
> Po3 auto n-802.1q trunking
> 1
>
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