Huawei Technologies Co., Limited

Zhibo Hu

Junda Yao

Zuliang Wang

Cheng Li

Huaimo Chen

Zhenbin Li

Haibo Wang

Juan Zheng

Gang Yan

Sheng Fang

Lei Zhang

Guoquan Liu

Guoqi Xu

Chuang Chen

Juhua Xu

Ka Zhang

Lei Bao

Jiajia Dong

Ruqin Lan

Chenxi Li

Song Liu

Chen Zhang

Jie Dong

Jingrong Xie

Yang Xia

Yongkang Zhang

Xudong Zhang

Shuying Liu

Jun Qiu

Jianbin Xu

Yongjian Hu

Wenxia Hou

Yinghai He

Yaqun Xiao

Xingjian He

Fang Gao

Mengkai Zhao

Xiugang Wei

This application discloses a forwarding entry generation method, a packet sending method, a network device, and a system, so that a specified network device cannot use a backup forwarding path to forward a packet, thereby reducing, to some extent, a technical problem such as network resource waste or network congestion caused by a loop problem. The method includes: A first network device obtains routing information advertised by a second network device; and the first network device determines that the routing information advertised by the second network device matches a summary route stored in the first network device, and generates, based on a segment identifier of the second network device, a forwarding entry corresponding to the summary route. The forwarding entry includes the segment identifier of the second network device, and a forwarding path corresponding to the forwarding entry passes through the second network device.

Forwarding entry generation method, packet sending method, network device, and system

A first network device obtains a first route, where the first route includes a first route prefix. The first network device advertises a second route, where the second route includes a subnet prefix and a path identifier, and a range of the subnet prefix includes a range of the first route prefix.

Route advertisement method and related device

Embodiments of this application provide a packet forwarding method. In the method, a first network device generates a first packet, where the first packet includes a segment list corresponding to a forwarding path of the first packet, the segment list includes a plurality of sequentially arranged compressed segment identifiers, a length of each of the plurality of compressed segment identifiers is less than 128 bits, the plurality of compressed segment identifiers include a first-type compressed segment identifier and a second-type compressed segment identifier, a length of the first-type compressed segment identifier is a first length, a length of the second-type compressed segment identifier is a second length, and the first length is less than the second length. The first network device sends the first packet based on the segment list.

Packet forwarding method, device, and system

This application discloses a transmission path fault processing method and apparatus, and a system, to resolve a problem that a packet fails to be forwarded because a previous-hop node of a faulty node cannot process a stitching label. The method includes: receiving, by a first network device, a stitching label and a stitching label stack list corresponding to the stitching label that are sent by a stitching network device; determining, in a process of sending a packet through a primary path, that the stitching network device is faulty, where the packet includes a label stack list, and the stitching network device is a next-hop network device of the first network device; and replacing, by the first network device, the stitching label in the label stack list with the stitching label stack list, and switching, based on the updated label stack list, the packet to a backup path for sending.

Transmission path fault processing method and apparatus, and system

A packet sending method and a related device are disclosed. The method includes: A network device obtains a first packet, where an internet protocol extension header of the first packet includes a first identifier, and the first identifier indicates a service requirement corresponding to the first packet. The network device determines, based on the first identifier and a second identifier, path indication information corresponding to the first packet, where a destination address of the first packet includes the second identifier, and the path indication information herein includes one or more of a network slice identifier and a segment identifier list. The network device updates the first packet based on the path indication information to obtain a second packet, and sends the second packet.

Packet sending method, device, and system

A method for forwarding a packet including: receiving a first packet, where a first packet header of the first packet includes a segment list used to forward the first packet, the segment list includes a plurality of sequentially arranged identifiers, each of the plurality of identifiers corresponds to one network device or one link, the list includes a first element whose length is 128 bits, the first element includes at least two adjacent identifiers in the plurality of identifiers, and the first packet includes a first pointer; determining a location of a first identifier in the first element based on a value of the first pointer, where the first identifier is one of the at least two identifiers; copying at least one identifier starting from the first identifier to a second packet header of the first packet, to generate a second packet; and sending the second packet.

Method for forwarding packet in SR network, device, and system

A communication method includes a first network device obtaining a first route and a second route from a second network device. A first network segment corresponding to the first route is a subnet segment of a second network segment corresponding to the second route. The second route is an aggregated route, and the first route indicates that the first network segment is unreachable. The first network device switches a next hop of the aggregated route based on the first route.

Communication method and apparatus

This application provides a method for forwarding a packet in an SRv6 service function chain, an SFF, and an SF device, and belongs to the field of communication technologies. In this application, an End.PT.SID is used to identify that the SFF forwards an SRv6 packet to the SF device without stripping an SRH. Based on the End.PT.SID, the SFF does not strip the SRH in the SRv6 packet, but sends the SRv6 packet to the SF device. In addition, the SFF includes a control flag in the SRv6 packet, so that the control flag is used to identify a scenario in which an IPv6 extension header needs to be offset. The SF device directly offsets the IPv6 extension header in the SRv6 packet based on the control flag, to skip the SRH for service processing.

Method for forwarding packet in SRv6 service function chain, SFF, and SF device

A method includes obtaining, by a first network node, a first segment identifier advertisement message, where the first segment identifier advertisement message includes a first segment identifier and a first flag bit, and the first segment identifier is corresponding to a second network node; determining, by the first network node, that the first flag bit indicates that a packet needs to be forwarded through the second network node; and generating, by the first network node, a first packet forwarding path, where the first packet forwarding path includes the second network node.

Method and system for determining packet forwarding path, and network node

A binding segment identifier processing method and a device are provided. The method includes a network device receives a message sent by a controller, where the message includes type information and a segment identifier, and the type information indicates that the segment identifier is a binding segment identifier BSID. The network device performs a processing action on the BSID based on the type information. According to embodiments of this application, the network device can identify the BSID, to resolve a technical problem that an incorrect processing result is caused when a segment identifier list of the network device includes the BSID.

Binding segment identifier processing method and device

This application provides a packet processing method and apparatus, a device, and a storage medium, and pertains to the field of communication technologies. In this application, a control identifier field is added to a packet, and the control identifier field indicates whether forwarding of the packet is allowed when the first network device does not configure the slice identifier on an outbound interface. The control identifier field and a slice identifier of a network slice are carried in the packet, so that the slice identifier and the control identifier field are transmitted on a network together. When a receive end does not configure the slice identifier on the outbound interface, the receive end can discard the packet based on the control identifier field, instead of forwarding the packet by using routing information.

Packet processing method and apparatus, device, and storage medium

A controller obtains request messages. The controller creates at least two network slices based on the request messages. The at least two network slices include a first network slice and a second network slice. The first network slice and the second network slice share a resource object at each layer in a network slice architecture. The controller sends information including information about the first network slice and information about the second network slice to one or more target forwarding devices. The information about the first network slice indicates a resource object that is at each layer in the network slice architecture and that is associated with the first network slice. The information about the second network slice indicates a resource object that is at each layer in the network slice architecture and that is associated with the second network slice.

Network slice sharing of resource objects

A Proxy Forwarding node configured to advertise Segment Routing (SR) proxy forwarding capability of the Proxy Forwarding node for neighboring nodes of the Proxy Forwarding node using extensions to interior gateway protocol (IGP) for Proxy Forwarding for enabling an ingress node to the SR Traffic Engineering (SR-TE) path to continue to forward the traffic without modifying a segment list of the SR-TE path that includes a node segment identifier (SID) of a failed neighboring node of the Proxy Forwarding node. When the Proxy Forwarding node receives traffic targeting the failed neighboring node, the Proxy Forwarding node performs SR proxy forwarding for the failed neighboring node by forwarding the traffic towards a destination of the traffic in a direction that avoids the failed neighboring node for a period of time after the IGP has converged.

Interior gateway protocol (IGP) for segment routing (SR) proxy segment identifiers (SIDs)

This application discloses a method, an apparatus, and a system for processing a transmission path fault. In this application, after a first network device receives a packet, and when the first network device determines that a third network device is faulty, a difference between an initial value of a segment routing global block SRGB of the first network device and an initial value of an SRGB of the third network device is determined, and a backup path is determined based on the difference and a backup forwarding table. The first network device sends a first packet based on the backup forwarding table.

Method and apparatus for processing transmission path fault, and system

A resource allocation method includes: obtaining, by a first network device, target resource reservation information based on a plurality of transmitted packets, where all of the packets carry a same virtual network identifier, and the virtual network identifier is used to indicate that the packets are transmitted through a same virtual network; and allocating a resource to the virtual network based on the target resource reservation information.

Growing community of inventors

Beijing, China

Zhibo Hu