Vlanstack is a combination of Svlan followed by Vlan.
To add and configure Vlanstack in a stream, add a protocol to the stream and set the protocol id to
ost_pb.Protocol.kVlanstackFieldNumber. However, unlike other protocols, the Vlanstack object accessed via the Protocol object's
Extensions dictionary using the key
vlanstack_pb2.vlanStack does not have any attributes of its own. Instead you need to access the individual Svlan and Vlan objects from the Protocol object's
Extensions dictionary using their respective keys.
from ostinato.protocols import svlan_pb2, vlan_pb2 ... # stream is an object of type ost_pb.Stream proto = stream.protocol.add() proto.protocol_id.id = ost_pb.Protocol.kVlanstackFieldNumber my_svlan = proto.Extensions[svlan_pb2.svlan] my_vlan = proto.Extensions[vlan_pb2.vlan]