138 results about "Egress router" patented technology

A method and system for automatically interconnecting IPv4 networks across an IPv6 network are disclosed. The method includes receiving an IPv4 packet at an ingress router in the IPv6 network and finding the longest match IPv4 routing entry for IPv4 addresses in the received packet to identify an egress router in the IPv6 network. The IPv4 packet is encapsulated to create an IPv6 packet, wherein destination and source addresses of the encapsulated packet identify a subnet router anycast corresponding to the ingress router and the egress router in the IPv6 network. The encapsulated packet is forwarded to the egress router.

Disclosed is a content based router, system and method of operation. Upon receipt of a data packet at in ingress router, the ingress router matches the content of the data packet against stored user subscriptions. In one embodiment, the content is described using XML data and the user subscriptions are defined by XML queries. The router assigns a routing label to the data packet based on the matching, and transmits the data packet to a second network router. Intermediate routers along the packets path then use the assigned label in combination with stored routing tables in order to determine next hop routing. Upon receipt at an egress router, the content of the message is matched against user subscriptions for those users serviced by the egress router, and the egress router provides the data packet to those end users whose subscriptions match the content. The assigned routing labels may define routing paths or routing trees.

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.

A method and system for forwarding data units in a communications system, that comprises: ingress routers (901) capable of forwarding data units and containing a Forwarding Equivalence Class table (911) that contains mapping information, intermediate routers (905, 907, 909) capable of forwarding data units, egress routers (903) capable of forwarding data and containing a Forwarding Equivalence Class table (919) that contains mapping information. The method comprising the steps of: assigning a first label on data unit and a second label on data unit based on mapping information, sending data unit in to egress router via one or more intermediate router (905, 907, 909), receiving (903) data unit, identifying data unit based on mapping information on Forwarding Equivalence Class table (919) and based on second label. The method further comprises the steps of: creating a Forwarding Equivalence Class for radio access network specific data units; and storing information about Forwarding Equivalence Class in Forwarding Equivalence class table (FEC).

A method for optimizing the use of network resources for the transmission of data signals, such as voice frames, between network units over an IP-packet supporting network. The data frames are obtained using codecs, which may have a different mouth-to-ear transmission delay, from data samples, e.g. voice samples, that are formatted and to which a data frame header is added. The method includes attributing codec categories to each of the data or voice frames according to the codecs by means of which the data samples are generated, each codec category corresponding to a different mouth-to-ear delay budget range for the data frames; sorting the data frames according to their codec categories; generating multiplexed cells from data frames of a same codec category, each multiplexed cell being obtained by multiplex aggregation of a predetermined number of voice samples; and transporting the multiplexed cells from an ingress router to an egress router in the IP-network.

There is disclosed an apparatus and method for limiting tunnel traffic in a network. Traffic engineering tunnels are used to direct traffic along a predefined path, which may differ from the path that internet protocol (IP) routing would determine. Interior gateway protocol (IGP) cut through will allow the forwarding of all destinations downstream of a tunnel through the tunnel, without the operator needing to specify a forwarding equivalence class (FEC). But congestion in the tunnel and network instability may result from this approach. A solution to these problems is disclosed which limits the traffic in the tunnel to only that with destination addresses of the tunnel's egress router or nodes directly supported thereby. Other solutions are disclosed which allow tunnel traffic to nodes having destination addresses other than those being directly supported by the tunnel's egress router. All of these solutions are achieved in both pre-determined forwarding entry and dynamic packet-by packet embodiments.

A hidden pathway to a host is provided in an internetwork having an egress router coupled to the host. A selected port of the egress router is connected to the host as a hidden access port. A label table in the egress router is configured to associate the selected port with a predetermined label. Distribution of the predetermined label is restricted to one or more controlled access points so that access to the hidden pathway is restricted to the controlled access points. The controlled access points may reside at the users themselves, but are preferably contained within proxy devices coupled to the internetwork using secure connections.

The invention provides an inter-area exit route dynamic selection method and system. The method comprises the following steps that each area exit router collects self information regularly; the transmission performance evaluated value of each area exit router is calculated; an inter-area router acquires the transmission performance evaluated value; priority levels are generated; the inter-area router carries out priority level sequencing on the area exit routers according to the transmission performance evaluated values; and the inter-area router selects the router with the maximal transmission performance evaluated value as the next-hop address of the exit router, wherein the area exit routers refer to routers which are used for connecting an inter-area network and an extra-area network and have direct communication capability, and the inter-area router refers to a router which is directly connected with the exit routers but does not have capability of directly communicating with the extra-area network. According to the method and the system which are provided by the invention, an existing route protocol is not required to be changed, the allocation of a static route table is automatically completed by the system, and the defect that the QoS (Quality of Service) is not considered in a traditional method is effectively overcome.

The invention provides a message sending method and apparatus and a message cross-domain forwarding network architecture. The message sending method comprises steps: a bit indexed explicit replication-rendezvous point (BIER-RP) device of a first domain announces an address of a cross-domain multicast group to a controller; and after a bit-index forwarding ingress router (BFIR) of the first domainreceives a multicast data message requesting to be transmitted across a domain to a second domain, the BFIR transmits the multicast data message to a bit-index forwarding egress router (BFER) of the first domain, and the BFER forwards the multicast data message to the second domain. The technical problem that many network resources need to be occupied when the multicast data message is transmittedin a related technology can be solved.

A system and method for transmitting data from a first site to a second site over a shared Multi-Protocol Label Switched (MPLS) network comprising a plurality of routers, including an ingress router in communication with the first site and an egress router in communication with the second site, includes configuring a plurality of label switching paths between the ingress router and the egress router over a plurality of label switching devices. The method further includes performing a first lookup on one of at least one virtual routing and forwarding (VRF) table stored in the ingress router, whereby the first lookup identifies one routing table from a plurality of routing tables stored in the ingress router, each routing table being associated with one of the plurality of label switched paths, and performing a second lookup on the one routing table, wherein the routing table defines the associated label switched path between the ingress router and the egress router for a virtual private network (VPN) between the first site and the second site.

In a source address selection system containing a router device connected to a plurality of Internet service providers, and a communication node connected to the router device, it becomes possible to utilize the multi-home environment effectively, by enabling the selection of the source address according to the egress router with respect to the Internet, by accounting for the state of connection with the Internet service provider.

The method includes steps: exit router receives request message from LAN, and the target address of the request message is network address of server in Internet; using the request message, the exit router detects response speed of link corresponding to each WAN interface; setting up WAN interface corresponding the link with fastest response speed as exit interface of next hop corresponding to target address so as to realize route selection. The invention does not need to collocate exit router by handwork, instead uses request message to determine route directly. The invention guarantees that LAN accesses server in Internet according to optimal route.

In one embodiment of the invention, a method for wireless communication includes receiving a packet destined to a destination node at a first egress router. The destination node is supported by a second egress router. A destination address of the packet is the first egress router. The received packet is redirected to the second egress router.

The invention provides a message transmission method based on double output-ports of the network and output-port routers, which are applied in a data centre network containing two output-port routers, and a connection is established between the two outlet-port routers; after receiving a request message from the (ISP) network side of a service supplier, each output-port router merely conducts the displacement of destination address, and creates a conversation information containing the source address of the request message and the destination address after the displacement, and then sends the request message; after receiving the message from the network side of the data center, by judging whether the self creates the conversation information containing the source address of the message and the destination address, if yes, the output-port router replaces the source address of the message by a public network address of the output-port routers and then transmits the public network address to the ISP gateway of the next hop; otherwise, the output-port router transmits the message to the other output-port router connected with the output-port router. The invention is favorable for realizing safety precautions of the servers in the data center network and improving the security of the data center network.