English to German Tech/Engineering Electronics / Elect Eng

The present invention relates to a mobile value-added service network technology, in particular to a service
chain management method, system and device.

The field information for judging the service type can be one or a combination of a plurality of the following
fields: field at layer 2, field at layer 3, field at layer 4 and fields at layers 4-7, wherein
the field at layer 2 can be a Media Access Control(MAC) address, a Multi-Protocol Label Switching(MPLS) identification
or a Virtual Local Area Network(VLAN) identification; the field at layer 3 can be an Internet Protocol(IP) address; the
field at layer 4 can be a Transmission Control Protocol(TCP)/User Datagram Protocol(UDP) port; and the fields at layers
4-7 can consist of a field pointer offset, a field length and a field value