DGS-3120-24SC:admin#create dot1v_protocol_group group_id 1 group_name pppoe   
Command: create dot1v_protocol_group group_id 1 group_name pppoe

Success.

DGS-3120-24SC:admin#config dot1v_protocol_group group_id 1 add protocol ethernet_2 8863             
Command: config dot1v_protocol_group group_id 1 add protocol ethernet_2 8863

Success.

DGS-3120-24SC:admin#config dot1v_protocol_group group_id 1 add protocol ethernet_2 8864
Command: config dot1v_protocol_group group_id 1 add protocol ethernet_2 8864

 A protocol template has been added to the group.

Fail!

create dot1v_protocol_group group_id 1 group_name pppoe
config dot1v_protocol_group group_id 1 add protocol ethernet_2 0x8863
config dot1v_protocol_group group_id 1 add protocol ieee802.3_snap 0x8863
config dot1v_protocol_group group_id 1 add protocol ethernet_2 0x8864
config dot1v_protocol_group group_id 1 add protocol ieee802.3_snap 0x8864
config port dot1v ports all add protocol_group group_id 1 vlan v212