SPBM data packet

B-DA

Destination B-MAC that identifies the destination BEB.

B-SA

Source B-MAC. It is a known MAC address of the BEB that encapsulates the MAC-in-MAC frame.

B-Tag

B-VLAN tag identifies the VLAN ID and priority of the frame in the SPBM network. The TPID in the tag is fixed at 0x8100.

I-Tag

Backbone service instance tag contains the following subfields:

• TPID—A value fixed at 0x88E7 to identify the frame as an 802.1ah encapsulated frame.

• I-PCP—Transmission priority of the frame on the BEB.

• I-DEI—Drop priority of the frame on the BEB.

• I-SID—Backbone service instance identifier.

• C-DA—Customer destination MAC address.

• C-SA—Customer source MAC address.

S-Tag

This field contains the outer customer VLAN ID and priority.

C-Tag

This field contains the inner customer VLAN ID and priority.