dear ng,
i'm just currently trying to change my native vlan, following works, but is it possible to change it globaly?
interface FastEthernet0/1 switchport trunk encapsulation dot1q switchport trunk native vlan 2 switchport trunk allowed vlan 2,20 switchport mode trunk
is it true that cdp advertises always with the lowest active vlan? had a funny experince with it.
cheers colin
Maybe you would like
interface range fa 0/1 - 24
Note "[space][dash][space]"
You can use commas too:-
int ra fa 0/2,5,7
I forget the "space" protocol in that case. "[space][comma][space]"
no spaces??
CDP protocol does not care about VLANs. CDP is placed "between" Layer1 and Layer2 of OSI model. So, switches and routers will see each other (sure, if CDP is enabled on port/interface) no matter what VLANs are configured on the port.
In addition, speaking about "native VLAN". The "native VLAN" is a VLAN, which will be used to mark a packet, which has no VLAN tag. It means, if switch sees a frame without a VLAN tag, it will mark it with the "native VLAN", and then send to the port. It has nothing to do with CDP.
Good luck,
Mike
------ Cisco IP Phone Headset Adapters
Have something to add? Share your thoughts — no account required.
Ask the community — no account required