A novel design of a gateway that handles traffic in and out of a network by using a datapath daemon is provided. The datapath daemon is a run-to-completion process that performs various data-plane packet-processing operations at the edge of the network. The datapath daemon dispatches packets to other processes or processing threads outside of the daemon by utilizing a user space network stack.

An object of the present disclosure is to provide a provider network device, a network system, and a program that shorten a communication disconnection time during redundancy switching in a Single-Active redundant configuration. The provider network device according to the present disclosure notifies a CE that a VLAN, which has been communicating with traffic, is disabled due to setting of a block point or that new traffic communication is enabled due to releasing of the block point. This allows the CE to quickly delete a previously used transfer database and build up a new transfer database, and thus it is possible to shorten a communication disconnection time during redundancy switching.

Disclosed by embodiments of the present application are a network access method used for an edge router and an edge router. One specific embodiment of the method comprises: receiving a first request message sent by a first tenant network edge device among at least one tenant network edge device; on the basis of port information of a port connected to the first tenant network edge device, obtaining a first request identification corresponding to the first tenant network edge device, wherein the first request identification is used to identify the first tenant network edge device; adding the first request identification to the first request message so as to generate a processed first request message; and on the basis of a stored routing table, forwarding the processed first request message to a cloud gateway.

Some embodiments provide a method for handling failure at one of several peer centralized components of a logical router. At a first one of the peer centralized components of the logical router, the method detects that a second one of the peer centralized components has failed. In response to the detection, the method automatically identifies a network layer address of the failed second peer. The method assumes responsibility for data traffic to the failed peer by broadcasting a message on a logical switch that connects all of the peer centralized components and a distributed component of the logical router. The message instructs recipients to associate the identified network layer address with a data link layer address of the first peer centralized component.

A novel design of a gateway that handles traffic in and out of a network by using a datapath daemon is provided. The datapath daemon is a run-to-completion process that performs various data-plane packet-processing operations at the edge of the network. In some embodiments, the datapath daemon dispatches packets to other processes or processing threads outside of the daemon. In some embodiments, the datapath daemon dispatches packets to a kernel network stack in order to support packet traffic monitoring.

An NFV cloud for providing a vCPE service by using a single Internet line may comprise: a vCPE service having a virtual LAN interface, a virtual WAN interface, and a virtual management interface; a virtual LAN network, a virtual WAN network, and a virtual management network connected to the virtual LAN interface, the virtual WAN interface, and the virtual management interface, respectively; a physical LAN interface for providing customer traffic to the virtual LAN network; a physical WAN interface for connecting the virtual management network to the outside in order to output, to the outside, traffic which has been output from the virtual WAN network and passed through the vCPE service, or to provide a management function for the vCPE service or the NFV cloud; and an interface agent for controlling a connection between the physical WAN interface and the virtual WAN network or the virtual management network.

A novel design of a gateway that handles traffic in and out of a network by using a datapath pipeline is provided. The datapath pipeline includes multiple stages for performing various data-plane packet-processing operations at the edge of the network. The processing stages include centralized routing stages and distributed routing stages. The processing stages can include service-providing stages such as NAT and firewall. The gateway caches the result previous packet operations and reapplies the result to subsequent packets that meet certain criteria. For packets that do not have applicable or valid result from previous packet processing operations, the gateway datapath daemon executes the pipelined packet processing stages and records a set of data from each stage of the pipeline and synthesizes those data into a cache entry for subsequent packets.

Some embodiments provide a method for handling failure at one of several peer centralized components of a logical router. At a first one of the peer centralized components of the logical router, the method detects that a second one of the peer centralized components has failed. In response to the detection, the method automatically identifies a network layer address of the failed second peer. The method assumes responsibility for data traffic to the failed peer by broadcasting a message on a logical switch that connects all of the peer centralized components and a distributed component of the logical router. The message instructs recipients to associate the identified network layer address with a data link layer address of the first peer centralized component.

Streaming media is problematic for thin clients using remoting protocols like RDP that were never designed to handle the volume of data associated with multimedia. The result is large demands on the host computer and thin client CPU and excessive bandwidth on the network, which results in a poor display quality. A process running on a host computer detects an existing multimedia acceleration channel to a thin client and also identifies unaccelerated media streams like Adobe Flash. The unaccelerated content is automatically re-encoded using a codec format supported by the thin client acceleration channel. This results in a significant improvement in the quality of the streaming media displayed on the thin client and overall reductions in host CPU load, network bandwidth and thin client CPU load. No additional software is required on the thin clients to support new media types including Adobe Flash.

Some embodiments provide a method for handling failure at one of several peer centralized components of a logical router. At a first one of the peer centralized components of the logical router, the method detects that a second one of the peer centralized components has failed. In response to the detection, the method automatically identifies a network layer address of the failed second peer. The method assumes responsibility for data traffic to the failed peer by broadcasting a message on a logical switch that connects all of the peer centralized components and a distributed component of the logical router. The message instructs recipients to associate the identified network layer address with a data link layer address of the first peer centralized component.