MPLS EXTENSION HEADERS IN MIXED NETWORKS

• Main Authors: GUICHARD JAMES N, ANDERSSON LOA, SONG HAOYU
• Format: Patent
• Language: Chinese; English
• Published: 24.09.2021
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A mixed Multiprotocol Label Switching (MPLS) network includes both extension header capable (EH capable) nodes and EH non-capable nodes. A first EH capable node receives advertised capabilities of a downstream node. These advertised capabilities indicate whether the downstream node is EH capable. The first EH capable node receives a packet to be transmitted to the downstream node via the MPLS network, and determines whether the packet includes an extension header (EH). The first EH capable node inserts an EH label into an MPLS label stack of the packet after determining the advertised capabilities of the downstream node indicate that the downstream node is EH capable, and after determining the packet does not include the EH. 混合多协议标签交换(Multiprotocol Label Switching，MPLS)网络包括扩展头支持(extension header capable，EH capable)节点和扩展头非支持节点。第一EH支持节点接收下游节点的通告的能力。这些通告的能力指示该下游节点是否支持EH。该第一EH支持节点接收通过该MPLS网络待传输至该下游节点的报文，确定该报文是否包括扩展头(extension header，EH)。在确定该下游节点的通告的能力指示该下游节点支持EH且确定该报文中不包括该EH后，该第一EH支持节点在该报文的MPLS标签栈中插入EH标签。