Requesting high availability for network connections through control messages

摘要

In one example, a network device includes one or more network interfaces configured to receive a message according to a protocol for reserving a public Internet protocol (IP) address and port for a network connection and to receive one or more packets of a packet flow associated with the public IP address and the port for the network connection, and one or more processors comprising a primary service device, wherein the processors are configured to determine whether the message includes an indication that the network connection is to be checkpointed for high availability, and wherein the primary service device is configured to, based on the indication, checkpoint data of at least one of the received packets to a backup service device. Accordingly, a message of a protocol for reserving a public network address and port may be used to indicate whether a network connection should be checkpointed for high availability.

主权项

1. A method comprising:
receiving, by a primary service device, a Port Control Protocol (PCP) request message for a network connection associated with a client device, the PCP request message comprising a header having a value of zero for a bit representing an indication of whether the network connection is to be checkpointed for high availability; receiving, by the primary service device, one or more packets of a packet flow associated with the network connection; performing, by the primary service device, at least one service on the packets of the packet flow; and based on the indication, checkpointing, by the primary service device, data of at least one of the received packets to a backup service device for the primary service device to provide high availability for the at least one service.