Management of private virtual networks
View Patent ↗A transmission system including a plurality of edge routers. The system manages a plurality of virtual networks, each network linking a plurality of remote networks therebetween. An edge router manages a topology table that indicates one or more adjacent edge routers for a given virtual network and at least one remote network identifier for an adjacent edge router. A route change made in relation to a remote network of a given virtual network is detected on the edge router. On the basis of the topology table, one or more adjacent edge routers and the corresponding remote network identifiers are determined for the virtual network. The route change is transmitted to said adjacent edge routers by indicating the corresponding remote network identifiers.
1. A method of routing in a transmission system comprising a plurality of border routers;
said system managing a plurality of virtual networks, each linking several mutually remote networks;
a border router managing a topology table indicating, for a given virtual network, one or more adjacent border routers and for an adjacent border router, at least one remote-network identifier;
said method comprising the following steps at the level of said border router managing said topology table:
detecting a change of route relating to a remote network of said given virtual network;
on the basis of the topology table, determining for said given virtual network, one or more adjacent border routers and the corresponding remote-network identifier or identifiers; and
transmitting the change of route to said adjacent border routers, while indicating the remote-network identifier or identifiers determined.
2. The routing method of claim 1 , in which the topology table for said given virtual network is updated according to a topology protocol as a function of a configuration of said virtual network,
said topology protocol comprising a topology broadcasting signal indicating a border router by which said remote network is connected to the transmission system and the corresponding remote-network identifier.
3. The routing method of claim 1 , in which the border router managing said topology table manages a routing table per virtual network indicating information about paths available for transmitting packets to the remote networks of said virtual network,
the routing table being updated on receipt of a change of route transmitted by another border router, said change of route indicating whether a path should be added, deleted or modified in the routing table.
4. A border router in a transmission system comprising a plurality of border routers;
said system managing a plurality of virtual networks, each linking several mutually remote networks;
said border router in said transmission system managing a topology table indicating, for a given virtual network, one or more adjacent border routers and for an adjacent border router, at least one remote-network identifier;
said border router managing said topology table comprising:
a reception unit adapted for detecting a change of route relating to a remote network of said given virtual network;
a determination unit adapted for determining, for the given virtual network, one or more adjacent border routers and the corresponding remote-network identifiers on the basis of the topology table; and
a transmission unit adapted for transmitting the change of route to said adjacent border routers, while indicating the remote-network identifiers determined.
5. The border router in said transmission system of claim 4 , comprising a topology management unit adapted for managing the topology table of said given virtual network by updating it according to a topology protocol as a function of a configuration of said given virtual network,
the topology table for said given virtual network being updated according to said topology protocol as a function of the configuration of said virtual network,
said topology protocol comprising a topology broadcasting signal indicating a border router by which said remote network is connected to the transmission system and a corresponding remote-network identifier.
6. The border router managing said topology table of claim 4 , comprising a routing management unit adapted for managing a routing table per virtual network indicating information about paths available for transmitting packets to the remote networks of said virtual network,
the routing table being updated on receipt of a change of route transmitted by another border router, said change of route indicating whether a path should be added, deleted or modified in the routing table.
7. A transmission system comprising a plurality of border routers;
said system managing a plurality of virtual networks, each linking several mutually remote networks;
a border router managing a topology table indicating, for a given virtual network, one or more adjacent border routers and for an adjacent border router, at least one remote-network identifier;
said border router managing said topology table comprising:
a reception unit adapted for detecting a change of route relating to a remote network of said given virtual network;
a determination unit adapted for determining, for said given virtual network, one or more adjacent border routers and the corresponding remote-network identifiers on the basis of the topology table; and
a transmission unit adapted for transmitting the change of route to said adjacent border routers, while indicating the remote-network identifiers determined.
8. A non-transitory computer-readable storage medium storing instructions for the implementation of the method of claim 1 wherein the program is executed by a processor.