A device may activate a layer 3 interface of the device based on activation of a first layer 2 interface associated with the layer 3 interface. The device may detect activation of a second layer 2 interface, associated with the layer 3 interface, after activating the layer 3 interface. The device may activate a filter to prevent transfer of network traffic via the second layer 2 interface based on detecting activation of the second layer 2 interface. The device may perform duplicate address detection, in association with the second layer 2 interface, for a layer 3 network address assigned to the device. The device may determine whether the layer 3 network address is a duplicate network address based on performing the duplicate address detection. The device may selectively maintain or deactivate the filter based on determining whether the layer 3 network address is a duplicate network address.

An apparatus includes a first media access control (MAC) device with a first radio transceiver and having a first MAC address, and a second MAC device with a second radio transceiver and having a second MAC address. The first MAC device is operative to communicate with a first wireless access point using an Internet Protocol (IP) address. The second MAC device is operatively coupled to the first MAC device, and is operative to communicate with a second wireless access point using the same IP address.

A printer has first and second interfaces for connecting to first and second networks having first and second data host configuration protocol servers. The first and second interfaces have differing media access control (MAC) addresses. The printer uses a recovery sequence to enable recovery for a host computer running an application when switching from the first printer interface to the second printer interface.

Disclosed are a redundant network IP smart failover method based on a redundant computer and a corresponding system. Each computer in any computer group comprises an IP address switching module, a network status detecting module, and a peer fault detecting module, wherein the IP address switching module is configured to smoothly switch an IP address in the redundant network; the peer fault detecting module is configured to mutually exclusively and stably acquire operation statuses of peer computers and quickly obtain a correct redundant network IP when necessary; and the network status detecting module is configured to determine status of the local network and status of the remote network to facilitate the IP address switching module to smartly switch the IP address. By additionally configuring a network status detecting module and a peer fault detecting module to aid the IP address switching module to allocate IP addresses more smartly, the disclosure can significantly improve reliability of the redundant network and effectively reduce IP conflicts during the redundant network failover process.

It is provided a method, comprising monitoring if a second data path is established for a flow, wherein a first internet protocol address is configured for the flow via a first data path between an apparatus performing the method and a packet data network; assigning, if the second data path is established, a second internet protocol address different from the first internet protocol address for the flow via the second data path, wherein at least a part of the first data path belongs to a radio access technology; at least a part of the second data path belongs to the radio access technology; and the part of the first data path is different from the part of the second data path.

A network device within a data communication network includes a plurality of network interfaces, each programmed with a respective set of Address Resolution Protocol (ARP) routing entries for correlating network addresses with physical addresses. Each network interface is further programmed with an additional respective set of Longest Prefix Match (LPM) routing entries for correlating other network addresses with designated network interfaces to enable traffic matching one of the LPM routing entries to be forwarded to the appropriate designated network interface within the network device.

IPv6 address assignment method and apparatus are provided. The method includes: receiving first Prefix Delegations (PDs) sent by at least two network access devices, where the first PDs sent by the different network access devices are different from each other; generating second PDs according to the received first PDs, where the second PDs have a one-to-one correspondence with the first PDs; and sending the generated second PDs to user device for generating by the user device IPv6 addresses according to the second PDs.

A network handover method, a terminal, a controller, a gateway, and a system. The method includes: when a terminal accesses a first network, converting data including an initial TCP four-tuple into data including a first TCP four-tuple, and sending the data to a gateway; and after handing over from the first network to a second network, converting data including the initial TCP four-tuple into data including a second TCP four-tuple, and sending the data including the second TCP four-tuple to the gateway. This achieves objectives of preventing a connection from being interrupted before and after the network handover, improving use experience, and reducing complexity of a network handover process.

Disclosed is a technique for performing flexible service-level access control in real-time while suppressing occurrence of signaling. According to the technique, a network entity (AAA server 10) configured to perform access control sets correspondences between addresses of a communication terminal (UE) 40 and respective service contents of services that the communication terminal 40 receives, and notifies the communication terminal of the correspondences. Thus, the communication terminal is able to know the service contents corresponding to the addresses that the communication terminal uses. In a case where a service content of a service that the communication terminal receives is changed, the address used by the communication terminal is changed to an address corresponding to the changed service content. As a result, from the changed address, the communication terminal is able to know that the service content has been changed and to know the changed service content.

A communication apparatus has a first interface for connecting with a first network and a second interface for connecting with a second network. The communication apparatus detects that an address used in the first network is changed, and furthermore, when it detects that the address that is changed in the first network duplicates an address being used in the second network, disconnects a connection of a link layer with the second network, and after the disconnection, reconstructs the second network using an address which is not duplicated by the changed address.