Hi,QinQ is kind of doubletagging where TPID value in outer vlan tag can be set to 0x8100 0x9100. but standard 802.1ad describes doubletagging with inner C-Vlan (customer vlan) and outer S-Vlan (service vlan). where TPID value in S-VLAN can be set to...
In my opinion from the operational point of view is better to have the same vlan ID at the access side and different at the BRAS (to make difference) - kind of vlan translation. It requires 'vlan local significance' feature on the switches where dsla...
Do you want to have the same VLAN ID (vlan 100) at DSLAM side to make operations simpler or to use only one vlan i.e vlan 100 for transport of traffic between DSLAMs and BRAS ?
