[c-nsp] L2 Tunnel Question

[Michael K. Smith]

Hi Mark:

On 5/12/06 9:43 AM, "Mark Lasarko" <mlasarko at co.ba.md.us> wrote:

> Greetings,
> I am having an issue getting CDP to function over an SP's link.
> I can ping across, but cannot see neighbors.
>  
> They have a core 7600, but the drops at the sites are (Fujitsu) Flashwave's.
>  
> Anyway we have established trunk ports on both sides and can ping;
> VLAN 1 and other relative vlans are explicitly allowed, etc...
>  
> I connect the core and client switches back to back and everything is good.
> I plug into the Flashwave(s), which are supposedly piped directly to the 7600
> in the CO.
> We have some access, but no CDP...
>  
> Here is the config the SP sent to me:
>  
> 7613#sh run int f13/17
> !
>  interface FastEthernet13/17
>  description Core
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk allowed vlan 270-272
>  switchport mode trunk
>  no ip address
>  speed 10
>  duplex full
>  l2protocol-tunnel cdp
>  l2protocol-tunnel stp
>  l2protocol-tunnel vtp
>  no cdp enable
>  spanning-tree bpdufilter enable
> end
>  
> 7613#sh run int f13/19
> !
> interface FastEthernet13/19
>  description Site1
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk allowed vlan 271
>  switchport mode trunk
>  no ip address
>  speed 10
>  duplex full
>  l2protocol-tunnel cdp
>  l2protocol-tunnel stp
>  l2protocol-tunnel vtp
>  no cdp enable
>  spanning-tree bpdufilter enable
> end
>  
> 7613#sh run int f13/20
> !
> interface FastEthernet13/20
>  description Site2
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk allowed vlan 272
>  switchport mode trunk
>  no ip address
>  speed 10
>  duplex full
>  l2protocol-tunnel cdp
>  l2protocol-tunnel stp
>  l2protocol-tunnel vtp
>  no cdp enable
>  spanning-tree bpdufilter enable
> 
> Any thoughts on this?
> We are trying to terminate into a 3550 at the core and 2900XL/3500XL switches
> at the clients/spokes.
> Keep in mind the XL's are just for proof of concept, we'll be into 3750's all
> around in production.
>  
> TIA,
> ~M 
> 

I've never seen the l2protocol-tunnel configuration parameters used on ports
in switchport mode.  I may be wrong here but I think the ports need to be
set to swtichport mode dot1q-tunnel in order to tunnel the packets.

Mike