This application discloses a processing method and device for external link rewiring. The method includes: IPv6 access service initiated by a client is responded to obtain a first page content, the first page content is processed to obtain a second page content, IPv4 detection service runs at the client according to the second page content to determine IP protocol stack information at the client, and the request initiated by the client is determined whether to perform the external link rewriting according to the IP protocol stack information. Through this application, the problem that the performance of the gateway device is affected because the external link requested at all clients is rewritten through the gateway device in the related art is solved.

In one embodiment, packets are forwarded in a network based on multiple compact forwarding identifiers represented in a single 128-bit Internet Protocol Version 6 (IPv6) address, such as, but not limited to being in the destination address field of the IPv6 header (e.g., possibly in an extended IPv6 header). One embodiment follows the forwarding order of these multiple compact forwarding identifiers by respectively placing them in the single IPv6 address from high-order to lower-order bit positions. In one embodiment, a compact forwarding identifier prefix is part of the address represented by each compact forwarding identifier, typically with the compact forwarding identifier prefix stored in the highest-order bit positions. One embodiment uses a longest prefix matching operation to match the compact forwarding identifier to be used in determining how to next process the packet.

A first network device associated with a network may establish an Internet protocol version 6 Multiprotocol BGP session with a second network device associated with the network. The first network device and second network device are both capable of forwarding both IPv4 and IPv6 packets with only an IPv6 address configured on the interface of both the first network device and second network device. The first network device may exchange Multiprotocol Reachability capability with second network device for corresponding 2-tuple Address Family Identifier/Subsequent Address Family Identifier. The first network device may advertise Internet protocol version 4 network layer reachability information and may advertise Internet protocol version 6 network layer reachability information with IPv6 extended next hop encoding using Internet Assigned Numbering Authority assigned capability code value 5 to second network device.

An automation system includes a first system area including a transmitting redundancy handling device and a second system area including a receiving redundancy handling device. Device obtains a first communication protocol packet with automation application data and a sequence number linked thereto, extracts the sequence number and places it in a destination option header of a first IPv6 packet, which also includes the first communication protocol packet, sends packet to the receiving redundancy handling device, obtains a second communication protocol packet having the same automation application data and sequence number, places the sequence number in a destination option header of a second IPV6 packet also including the second communication protocol packet, and sends packet to device. Device receives the packets, analyses the destination option headers, determines that the sequence number is the same in the packets and discards the first or the second IPv6 packet based on the determination.

Some embodiments of the invention provide novel methods for facilitating a distributed SNAT (dSNAT) middlebox service operation for a first network at a host computer in the first network on which the dSNAT middlebox service operation is performed and a gateway device between the first network and a second network. The novel methods enable dSNAT that provides stateful SNAT at multiple host computers, thus avoiding the bottleneck problem associated with providing stateful SNAT at gateways and also significantly reduces the need to redirect packets received at the wrong host by using a capacity of off-the-shelf gateway devices to perform IPV6 encapsulation for IPv4 packets and assigning locally unique IPv6 addresses to each host executing a dSNAT middlebox service instance that are used by the gateway device.

Techniques for utilizing dual-stack network addressing for compute instances hosted in an edge location of a cloud provider network along with communications service provider (CSP) network addresses are described. A first network address is assigned to the compute instance from a pool of network addresses of the cloud provider network, and a second network address is associated with the compute instance that is provided by the CSP network. A gateway of the edge location is updated to direct packets addressed to the second network address to the compute instance via use of the first network address.

A network includes at least two nodes that employ a routing protocol to communicate across a network. One of the nodes is a parent node and another of the nodes is a child node of the parent node. An address generator assigns a unique network address to the child node by appending an address value of a number of bits to a parent address of the parent node to create the unique network address for the child node.

A method for managing Internet Protocol Version 6 (IPv6) addresses in a wireless sensor network is provided that includes storing, on a wireless sensor device in the wireless sensor network, a prefix of an IPv6 address in association with a key, forming an address indicator for the IPv6 address, the address indicator consisting of the key and a node address of the IPv6 address, and storing the address indicator in at least one memory location on the wireless sensor device in lieu of the IPv6 address.

A network node may receive a packet that originated from a root network node and may process the packet to determine segment identifier (SID) information associated with a point-to-multipoint transport chain. The network node may determine, based on the SID information, that the network node is a transit leaf node in the point-to-multipoint transport chain. The network node may generate, based on determining that the network node is a transit leaf node in the point-to-multipoint transport chain, a copy of the packet and may process the copy of the packet to perform one or more actions. The network node may update, based on determining that the network node is a transit leaf node in the point-to-multipoint transport chain, the SID information and may send, after updating the SID information, the packet, with the updated SID information, to another network node.

The present invention is directed to methods and systems for querying a database of geofences, with each geofence in the database being associated with a plurality of IP addresses, preferably IPv6 addresses, and each IP address corresponding to a specific geographic coordinate. The method and system convert location coordinates to IP addresses and determine whether a location anchor point is associated with a geofence.