PBB I-VPLS

• Port Level

  • All existing Ethernet encapsulation types are supported (for example, null, dot1q, qinq).

• SAPs

  • The I-VPLS SAPs can coexist on the same port with SAPs for other business services, for example, VLL, VPLS SAPs.

  • All existing Ethernet encapsulation are supported: null, dot1q, qinq.

Existing SAP processing rules still apply for the I-VPLS case; the SAP encapsulation definition on Ethernet ingress ports defines which VLAN tags are used to determine the service that the packet belongs to:

• null encap defined on ingress

  Any VLAN tags are ignored and the packet goes to a default service for the SAP.

• dot1q encap defined on ingress

  Only first VLAN tag is considered.

• QinQ encap defined on ingress

  Both VLAN tags are considered; wildcard support for the inner VLAN tag.

• For dot1q/qinq encapsulations, traffic encapsulated with VLAN tags for which there is no definition is discarded.

• Note that any VLAN tag used for service selection on the I-SAP is stripped before the PBB encapsulation is added. Appropriate VLAN tags are added at the remote PBB PE when sending the packet out on the egress SAP.