143 results about "Default gateway" patented technology

Disclosed is an apparatus and method of client device roaming from a home subnet to a foreign subnet of a network. The method includes the client device accessing the network through a first access node of the home subnet, and the client device roaming to a second access node of the foreign subnet, the client device accessing the network through the second access node, the client device maintaining a fixed client IP address, default gateway IP address and IP subnet attachment as the client device roams from the first access node to the second access node.

A physical host executes a virtual machine monitor (VMM) that instantiates a source virtual machine (VM). In response to the VMM receiving from the source VM a packet specifying a first destination address of a destination VM and a second destination address of a default gateway, the VMM determines whether the packet can be communicated to the destination VM without the packet being routed by the default gateway. In response to the VMM determining that the packet can be communicated to the destination VM without the packet being routed by the default gateway, the VMM forwards the packet to the destination VM such that the packet bypasses routing by the default gateway.

Embodiments of the invention relate to providing default gateway virtualization in a distributed overlay virtual environment. One embodiment includes a method that includes creating a packet by a first virtual machine (VM) including a first destination address. The packet is received from the first VM by a first virtual switch. A second destination address for a second VM is obtained by the first virtual switch based on information in the packet. The first destination address in the packet is replaced with the second destination address. The packet is encapsulated using a header that is addressed for a second virtual switch.

A default gateway router of a multi-homed site is configured for supplying, to a host device, a plurality of address prefixes having been advertised by respective exit routers providing respective connecting links for the multi-homed site to a wide area network. The default gateway router sends the address prefixes to the host device in a determined order based on a determined preference in the default gateway router for reaching the respective exit routers. The host device is configured for selecting a source address according to the determined order supplied by the default gateway router. The address also prefixes may be grouped according to identified destination prefixes, enabling the host device to select, for a given identified destination prefix, the source address according to the ordering of address prefixes within the corresponding group.

The invention allows routing data packets from a multihomed host. A default gateway is associated with each of network addresses associated with the multihomed host. One of the associated network addresses is assigned to a data packet to be sent from the multihomed host as its source address. A routing table of the multihomed host is searched for a route matching a destination address of the data packet. It is determined, in response to one of no route found and the found route being a default route of the routing table, which of the default gateways is associated with the assigned source address, and the data packet is dispatched to this determined default gateway.

An embodiment of the invention provides a method for virtual machine migration in a network. The method comprises: before a virtual machine migrating from a second entity gateway to a first entity gateway, the first entity gateway configuring a virtual gateway IP address; after the virtual machine migrating from a second entity gateway to a first entity gateway, the first entity gateway receiving a free address resolution protocol (ARP) message sent by the virtual machine, the free ARP message comprising an IP address of the virtual machine and an MAC address; the first entity gateway generating routing of the virtual machine according to the IP address of the virtual machine; and the first entity gateway issuing the routing of the virtual machine to a data center. The embodiment of the invention also provides an entity gateway and a system for virtual machine migration. Through the technical scheme provided in the embodiment, when the virtual machine migrates, default gateway configured in the virtual machine does not need reconfiguration. The virtual machine cannot aware changes of the gateway, so that a problem of flow interruption in a process of the virtual machine migration caused by gateway changing is prevented.

The invention provides a method and a route device thereof for realizing the virtual router redundant protocol (VRRP) loading balance. The virtual router comprises a plurality of routing devices. Default gateway IP addresses of clients at the same network segment are configured into the virtual IP address of the virtual router. In the method, the virtual router chooses a main route device as a self-distributing virtual MAC address, distributes different virtual MAC addresses to other routing devices after receiving virtual MAC distributing request messages that are sent by other routing devices and sends the addresses to other routing devices by address responding messages. After address analyzing requests from the clients are received, the virtual MAC addresses which are distributed to the routing devices of the virtual router are carried in the address analyzing response to be reverted to the clients. Therefore, the configuration of VRRP is simplified and the dynamic VRRP loading balance is realized.

The invention relates to a communication method. The communication method comprises the following steps that: after hosts on the same network segment and different network segments are interconnected through an OpenFlow switch and an SDN (Software Defined Network) controller, the OpenFlow switch receives a first PING request message transmitted by a first host, wherein a target IP (Internet Protocol) address of the first PING request message is an IP address of a virtual gateway and a target MAC (Media Access Control) address of the first PING request message is an MAC address of the virtual gateway, the PING request message is transmitted to the SDN controller, and then a PING reply message issued by the SDN controller is issued to the first host, so that a communication link between the virtual gateway and the first host is established. After once configuration, the OpenFlow switch and the SDN controller are taken as a common default gateway of the switches on several network segments, the interconnection communication between the gateways is implemented, and communication between the hosts on the different network segments can be further implemented.

The invention discloses a temperature moisture collecting communication system for a greenhouse shed based on wireless sensor network, which comprises the following parts: a wireless sensor network constituted by measuring nodes which are distributed in the greenhouse shed; a monitoring device which is formed by connection of nodes in a base station and a monitoring terminal. The nodes in the base station are provided with wireless communication with the wireless sensor network. The monitoring terminal sets the communication system as a local display working mode or remote monitoring working mode through sending a control command. An input device is arranged in the monitoring terminal, such that the user can control the rate of sending data by the input device. The default rate of sending data is set as one time in per 30 minutes. The invention has the advantages of small volume, less power consumption, rapid network layout, convenient deploy and low cost.

A plug-in module of a DHCP server enforces a security policy of a computer network. The module receives a request to provide an IP address for an end-user computer. A blacklist database is consulted to determine if the computer is not in compliance with the policy. If not compliant, the module returns to the computer a special IP address, a special default gateway and a lease time; the special IP address places the computer in a restricted network segment of the network where it cannot send network packets to other computers. If compliant, the computer receives an IP address and a lease time. The first time an IP address is requested a probe is triggered to determine if the computer is compliant using software not present on the computer. A cleanup service located in the restricted segment remove malware and updates software. Lease times increase after each successful request of an IP address.

A method and an apparatus are provided which enable a local system using a link local address to communicate with an external system. The local system can communicate with the external system by using a MAC address of a router found through an ARP packet. The local system transfers an ARP packet for the external system to a sub network by designating an IP address of a default gateway as an IP address of the local system.

The invention discloses a method for detecting the status of the default gateway and corresponding device which can be used in the network system with default gateway. The said default gateway is directly connected to the physical ports of the devices in the network, and these devices have loop checks on the physical ports with default gateway connected directly. If the physical ports is under the status of UP, the working status of the default gateway connected directly with the physical ports is Normal; if the detected status is DOWN, then get the Abnormal result of the status of the default gateway.

The invention provides a method and system for connecting users by virtual router redundant protocol (VRRP), belonging to communication technical field. And it provides a method for connecting users by VRRP, comprising the steps of: establishing a VRRP instance; main router sends free ARP messages at regular time and VRRP responds to terminal's ARP request; and it also provides a system for connecting users by VRRP, comprising router, switcher and terminal. And it saves VRRP resources and router hardware resources, reduces waste of IP addresses, increases number of connected users and all users are configured with only one default gateway.

Multiple TCP/IP stack processors on a host. The multiple TCP/IP stack processors are provided independently of TCP/IP stack processors implemented by virtual machines on the host. The TCP/IP stack processors provide multiple different default gateway addresses for use with multiple processes. The default gateway addresses allow a service to communicate across an L3 network. Processes outside of virtual machines that utilize the TCP/IP stack processor on a first host can benefit from using their own gateway, and communicate with their peer process on a second host, regardless of whether the second host is located within the same subnet or a different subnet. The multiple TCP/IP stack processors can use separately allocated resources. Separate TCP/IP stack processors can be provided for each of multiple tenants on the host. Separate loopback interfaces of multiple TCP/IP stack processors can be used to create separate containment for separate sets of processes on a host.

Some embodiments provide a centralized overlay-network cloud gateway and a set of centralized services in a transit virtual cloud network (VCN) connected to multiple other compute VCNs hosting compute nodes (VMs, containers, etc.) that are part of (belong to) the overlay network. The centralized overlay-network cloud gateway provides connectivity between compute nodes of the overlay network (e.g., a logical network spanning multiple VCNs) and compute nodes in external networks. Some embodiments use the centralized overlay-network cloud gateway to provide transitive routing (e.g., routing through a transit VCN) in the absence of direct peering between source and destination VCNs. The overlay network, of some embodiments, uses the same subnetting and default gateway address for each compute node as the cloud provider network provided by the virtual private cloud provider.

The invention discloses an adaptive mode switching method for a wireless Mesh network. The method comprises steps: a portal point periodically operates a certain address command in the ping internet; in the case of ping interoperability, the portal point is switched in a MPP (Mesh Portal Point) mode, and the default gateway routing entry of the original point is deleted; in the case of unable ping interoperability, the portal point is switched in a MP (Mesh Point) mode; after a message is sent to the portal point, whether a network bridge exit is consistent with the default gateway IP address is checked; in the case of consistency, the MPP is switched in the MP mode, and the default gateway routing entry is added; the MP is switched in the MPP mode, and the default gateway routing entry is deleted; and the MP is switched in the MP mode, whether the default gateway IP in a gateway list is the same as the default gateway IP address through a bridge interface is compared, if not, the default gateway through the interface is deleted, and a new default gateway is added. An adaptive switching function is realized in a WMN network multi-gateway environment is realized, the robustness of the network is added, and surfing experience of the user is enhanced.

The invention provides a gateway information sharing query method and system based on a block chain, and belongs to the technical field of block chains. The method includes: generating raw data; Writing the plaintext data of the original data into a service system database; Installing and deploying a data gateway, and carrying out node initialization; enabling the data gateway to perform data conversion processing on the plaintext data; Transmitting the plaintext data and storing the plaintext data in a local private database; And unselectively broadcasting the hash value of the plaintext datato the related nodes on the chain through a consensus mechanism in a multilateral classification account design mode. The invention also provides a block chain-based gateway information sharing querysystem, which adopts a localized data gateway and a private database to store the plaintext data and the abstract value separately. According to the method and the device, the privacy of the user canbe effectively protected, the problem of congestion caused by continuous increase of the data storage amount of the whole shared network is effectively avoided, and the processing efficiency and theperformance are greatly improved.

The invention provides a switchable antenna and electronic equipment, wherein, the switchable antenna comprises an antenna connector which provides an interface for being inserted with an adapting antenna; a radio-frequency circuit for generating and treating radio-frequency signals; a radio-frequency switch that is connected with different transceiving channels; and a default antenna used for receiving and sending the radio-frequency signals; wherein, the radio-frequency circuit, the radio-frequency switch and the default antenna form a default transceiving channel; the radio-frequency circuit and the radio-frequency switch form an adapting transceiving channel; the switchable antenna also comprises a control unit, when the antenna connector is inserted with the adapting antenna, second control level is output, and the radio-frequency switch connects the adapting transceiving channel to receive and send the radio-frequency signals according to the second control level; when the antenna connector is not inserted with the adapting antenna, first control level is output, and the radio-frequency switch connects the default transceiving channel to receive and send the radio-frequency signals according to the first control level. The embodiment of the invention has the advantage that software operation interface and other configuration are not needed in any application occasion, thus the user can conveniently realize the switch among different antennas.

A method and system for routing data across heterogeneous networks. In one embodiment, a heterogeneous network comprises a specialized in-band network that is privately accessible within the heterogeneous network, as well as an out-of-band network that is coupled to the in-band network by a switching platform. A client on the out-of-band network is configured to transmit a request for server data to the switching platform. The request is formatted according to the protocol of the out-of-band network and may take the form of a uniform resource locator (URL). The switching platform is configured to recognize the request as one which is directed to a server on the in-band network. The switching platform parses the request to determine the requested data and reformats this information as a new request that is transmitted to the server according to the protocol of the in-band network. The server provides data responsive to the new request, which is transmitted back to the switching platform according to the protocol of the in-band network. The switching platform then reformats the responsive data according to the protocol of the out-of-band network and transmits it to the client. The switching platform is separate from the default gateway and proxy servers.

The invention provides a virtual machine system and a method thereof for sharing the point-to-point protocol linkage of Ethernet. The system comprises an SOS, a virtual machine monitor, a GOS and a real physics network card. A virtual machine router has the functions of routing and network address conversion, wherein, the SOS is used for establishing PPPoE connection with a real remote PPPoE server by using user names and passwords in a PPPoE connection request which is sent by a intercepted first GOS, and a first PPP interface is established; the first GOS is used for establishing the PPPoE connection with the SOS, and accessing external networks by a PPP interface router; a second GOS except for the first GOS is used for automatically setting the IP address of the virtual network card and the IP address and the network segment of the pseudo network card of the SOS, after the default gateway is the IP address of the pseudo network card, networks are accessed by the first PPP interface router. The invention realizes the simple and safe connection of sharing PPPoE to access the external networks.

Multiple TCP/IP stack processors on a host. The multiple TCP/IP stack processors are provided independently of TCP/IP stack processors implemented by virtual machines on the host. The TCP/IP stack processors provide multiple different default gateway addresses for use with multiple processes. The default gateway addresses allow a service to communicate across an L3 network. Processes outside of virtual machines that utilize the TCP/IP stack processor on a first host can benefit from using their own gateway, and communicate with their peer process on a second host, regardless of whether the second host is located within the same subnet or a different subnet. The multiple TCP/IP stack processors can use separately allocated resources. Separate TCP/IP stack processors can be provided for each of multiple tenants on the host. Separate loopback interfaces of multiple TCP/IP stack processors can be used to create separate containment for separate sets of processes on a host.

Different subnets are allocated to respective wireless LAN terminals. It is assumed that when the setting of IP addresses is completed, a packet is to be sent from wireless LAN terminal 1 to wireless LAN terminal 2. Since the different subnets are allocated to respective wireless LAN terminals 1, 2, wireless LAN terminals 1, 2 are unable to communicate directly with each other. Wireless LAN terminal 1 sends a packet destined for wireless LAN terminal 2 to a default gateway (=access limiter). Since the packet received by the access limiter is destined for wireless LAN terminal 2, the access limiter transfers the packet to wireless LAN terminal 2.

Multiple TCP/IP stack processors on a host. The multiple TCP/IP stack processors are provided independently of TCP/IP stack processors implemented by virtual machines on the host. The TCP/IP stack processors provide multiple different default gateway addresses for use with multiple processes. The default gateway addresses allow a service to communicate across an L3 network. Processes outside of virtual machines that utilize the TCP/IP stack processor on a first host can benefit from using their own gateway, and communicate with their peer process on a second host, regardless of whether the second host is located within the same subnet or a different subnet. The multiple TCP/IP stack processors can use separately allocated resources. Separate TCP/IP stack processors can be provided for each of multiple tenants on the host. Separate loopback interfaces of multiple TCP/IP stack processors can be used to create separate containment for separate sets of processes on a host.