Native Vlan with dot1q Tunneling

[KAMRAN HASSAN]

According to my understanding, the native Vlan on a dot1q tunnel port will be the one that is configured as

"switchport access vlan ##"

Pl correct me if I am wrong.

[Jon Marshall]

Are you referring to a dot1q trunk link or dot1q tunneling which is used by ISPs ?

Jon

[paul driver]

L2 protocols can be configured to use QinQ - cdp, stp-vtp

in this case i am using cdp:

example of qinq tunnel

to make r1 see r2  via cdp

r1 -sw1 -sw4 -sw3 -sw2 -r2

R1

int fa0/0

ip address 10.1.12.1 255.255.255.0

Sw1

vtp domainQinQ

( this needs to be done for future vlan creations across the trunks)

int fa0/1

sw acc  vlan 100

swi mode dot1q-tunnel

l2protocol-tunnel cdp

int fa0/23

des to sw4

swi trun encap isl

swi mode trun

Sw4

int fa0/23

des to sw1

swi trun encap isl

swi mode tru

int fa0/19

des to sw3

swi trun encap isl

swi mode tru

Sw3

des to sw4

int fa0/19

swi trun encap isl

swi mode tru

int fa0/23

des to sw2

swi trun encap isl

swi mode tru

Sw2

int fa0/23

des to sw3

swi trun encap isl

swi mode tru

int fa0/1

sw acc  vlan 100

swi mode dot1q-tunnel

l2protocol-tunnel cdp

R2

int fa0/0

ip address 10.1.12.2 255.255.255.0

res

Paul