35 results about "Proxy ARP" patented technology

In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal. Once a proxy pair is discovered, that proxy pair might transform traffic from the server to the client or vice versa, transforming the traffic at one proxy of the proxy pair and untransforming the traffic at the other proxy of the pair.

A network device includes a proxy ARP (address resolution protocol) unit for comparing a target IP (Internet protocol) address contained in an ARP request frame with a first set of IP addresses in a proxy ARP table of the proxy ARP unit, and for generating an ARP reply frame containing a MAC (media access control) address of the network device according to a result of the comparison. In addition, the network device includes a routing table for storing a second set of IP addresses for IP packet routing. Furthermore, the network device includes a processing unit coupled between the proxy ARP unit and the routing table. The processing unit is operable for receiving the ARP request frame, assigning an IP address to a host logging onto the network device, and updating the assigned IP address into the proxy ARP table and the routing table respectively.

The invention discloses a method for realizing proxy ARP based on gratuitous ARP, which includes the following steps: A. The access switch monitors the gratuitous ARP process of the IP host, creates and saves the host IP address information, and sends the host IP address information to the aggregation switch; B, the aggregation switch receives the host IP address information, and saves it in the host IP address information table; C, the aggregation switch detects the target in the message after receiving the ARP request message sent by the IP host Whether the IP address is in the host IP address information table, if yes, send an ARP response message to the IP host, if not, discard the ARP request message. The invention realizes the reachability detection of the target terminal in the proxy ARP.

A method to improve connection smooth-going of operative communication works in equipment of operative end as the new register request will be ignored or other wise to carry on normal registering program if the point distance of time for last time of registering request is less than a preset figure at the point of this time when message of registering request emitted by agent servor is detected at a point of time; in the agent servor as the cold registering request will be deleted and only new registering request will be processed if the state of former registering request is in confirmation, channel production or agent ARP, or the cold registering request will be processed continuously and normally if the state of former registering request is in roll back of exiting when a new registering request is received.

The present invention provides a system and method based on Layer 2 VPN heterogeneous media intercommunication, the core of which is: the local PE is connected to at least one local CE through a Layer 2 switching device, the ARP agent in the local PE terminates the ARP request of the remote CE, Do not send an ARP response to the ARP request of the local CE mutual visit, and perform ARP learning according to the ARP request of the local CE mutual visit; the packet forwarding module in the local PE encapsulates the IP packet in the local CE packet into an MPLS packet and forwards it to the The remote PE encapsulates the IP packet in the remote CE packet transmitted by the remote PE into a Layer 2 Ethernet packet, and transmits the Layer 2 Ethernet packet to the local CE according to the ARP information learned by the ARP agent . The present invention provides an economical and practical layer-2 VPN solution for small and medium-sized enterprises to realize remote interconnection of enterprise networks, especially point-to-multipoint heterogeneous media intercommunication similar to hub-spoke, and realizes point-to-multipoint layer-2 broadcasting The purpose of Layer 2 VPN heterogeneous media intercommunication in large-scale networks.

A method to improve connection smooth-going of operative communication works in equipment of operative end as the new register request will be ignored or other wise to carry on normal registering program if the point distance of time for last time of registering request is less than a preset figure at the point of this time when message of registering request emitted by agent servor is detected at a point of time; in the agent servor as the cold registering request will be deleted and only new registering request will be processed if the state of former registering request is in confirmation, channel production or agent ARP, or the cold registering request will be processed continuously and normally if the state of former registering request is in roll back of exiting when a new registering request is received.

A method for automatically establishing a 4over6 tunnel based on an ARP proxy, which combines the LCRA function with the CPE device, obtains the address information of the real gateway and binds it with the MAC address of the CPE, so that the CPE device enables the proxy ARP function. During the transitional period, the IPv6 single-stack network is used as the access network to obtain public IPv4 addresses across the IPv6 network without changing the existing IPv4 terminal hosts, and a 4over6 tunnel is established with the CPE router as the tunnel initiation point to access the IPv4Internet, realizing IPv6 Mutual visits between IPv4 hosts in a single-stack access network.