Abstract: A packet processing method and apparatus, related to the communication field are provided. The method includes: re-encapsulating a first packet from a first device to obtain a second packet, where the first packet includes first identification information and first service function chain (SFC) header encapsulation information, the second packet includes first index information and the first identification information and does not include the first SFC header encapsulation information, and the first index information is associated with the first SFC header encapsulation information and the first identification information; and sending the second packet to the second device based on the first SFC header encapsulation information. This can avoid impact on packet transmission after the second device modifies the identification information.

Abstract: Embodiments of this application describe an in-situ flow detection-based packet processing method. After receiving a first packet encapsulated by using a first bearer protocol, a first node may obtain, based on the first packet, a second packet encapsulated by using a second bearer protocol. A first packet header of the first packet includes first in-situ flow detection information, and a packet header of the second packet also includes the first in-situ flow detection information. It can be learned that, when re-encapsulating the first packet by using the second bearer protocol, the first node does not remove the first in-situ flow detection information, but adds the first in-situ flow detection information to the packet encapsulated by using the second bearer protocol.

Abstract: This application discloses a packet transmission method, a proxy node, and a storage medium, and pertains to the field of communications technologies. According to the method, a new SID with a bypass function is extended for an End.AD SID. Therefore, when receiving a packet that carries the End.AD SID, a local proxy node uses this new SID to transmit an SRH of the packet to a peer proxy node in a bypass manner, so that the peer proxy node can also obtain the SRH of the packet, and therefore the SRH of the packet can be stored in the peer proxy node. In this way, synchronization of the SRH of the packet can be implemented between the two proxy nodes that are dual-homed to a same SF node, so that the SRH of the packet is redundantly backed up.

Abstract: This application discloses a packet transmission method and device. This application provides a method for forwarding a packet to a peer end to restore an SRH. A new SID with a bypass function is extended for an End.AD SID, so that when a local proxy node fails to find the SRH from a local cache, the new SID and control information used to indicate to restore the SRH are carried in the packet whose SRH needs to be restored. The packet is transmitted to a peer proxy node by using the new SID, to indicate the peer proxy node to replace the local proxy node to restore the SRH. In this way, the SRH corresponding to the packet can be restored through the peer proxy node, and then the packet can continue to be forwarded in a network by using the SRH.

Abstract: A packet processing method and apparatus, related to the communication field are provided. The method includes: re-encapsulating a first packet from a first device to obtain a second packet, where the first packet includes first identification information and first service function chain (SFC) header encapsulation information, the second packet includes first index information and the first identification information and does not include the first SFC header encapsulation information, and the first index information is associated with the first SFC header encapsulation information and the first identification information; and sending the second packet to the second device based on the first SFC header encapsulation information. This can avoid impact on packet transmission after the second device modifies the identification information.