Method and apparatus for managing remote IP network elements through SONET network elements
A method and apparatus for transmitting an IP packet between first and second remotely located IP end devices via a network operating under OSI. An IP interface is overlaid over OSI in the routers that are directly connected to the IP devices. These routers act as gateways, communicating with each other using OSI but able to convey IP information to the first and second IP devices via the overlaid IP interface.
1. A system for transmitting an IP packet between IP devices via a network including a plurality of routers comprising:
an overlaid IP interface over routers connected to a first IP device and a second IP device, where the first and second IP devices run a first communications protocol and the routers run a second communications protocol that is different from the first communications protocol, and wherein the router connected to said first IP device comprises a first gateway, and the router connected to said second IP device a second gateway, wherein the overlaid IP interface co-exists with said second communications protocol in said first gateway and said second gateway, said overlaid IP interface comprising:
a bi-directional IP tunnel interface comprising a network address for uniquely identifying the second gateway in the second communications protocol, an interface number for reaching said network address, and an IP address for said IP device to transmit the IP packet,
wherein the router having the first gateway and the router having the second gateway each comprise an OSI protocol stack having a Connectionless Network Layer Protocol (CLNP) layer, and an IP protocol stack placed over the OSI protocol stack, wherein the IP protocol stack includes an IP layer and the bi-directional IP tunnel interface which interfaces the IP layer with a CLNP layer of the OSI protocol stack.
2. The system of claim 1 , wherein the bi-directional IP tunnel interface is provided by a network administrator device.
3. The system of claim 1 , further comprising a network manager wherein the bi-directional IP tunnel interface is provided via a broadcast request sent by the network manager located in the first gateway and a response from the second gateway including said network address and the IP address of said second IP device.
4. The system of claim 2 , wherein said second communications protocol comprises SONET OSI.
5. The system of claim 3 , wherein said second communications protocol comprises SONET OSI.
6. The system of claim 1 , wherein the bi-directional IP tunnel interface includes a plurality of tunnels and each tunnel providing a connection between the IP layer and the CLNP layer, and each tunnel provides a pathway to a different router of the plurality of routers.
7. The system of claim 1 , wherein the first communications protocol is an IP protocol and the second communications protocol is an OSI protocol, such that the IP packet is routed between the routers through the bi-directional IP tunnel interface over the OSI protocol.
8. The system of claim 7 , wherein each of the plurality routers comprises the OSI protocol stack and the plurality of routers communicate with each other through the respective CLNP layers therein.
9. The system of claim 8 , wherein the IP protocol stack of the router having the first gateway, and the router having the second gateway handles the IP packet between the router having the first gateway and the first IP device and between the router having the second gateway and the second IP device, respectively.
10. The system of claim 6 , the router having the first gateway and the router having the second gateway each comprise a selector field which distinguishes a handling of incoming IP Packets from incoming OSI packets, and if an OSI packet is received, the selector field routes the OSI packet to a transport layer of the OSI stack, and
if the IP packet is received, the selected field routes the IP packet to the bi-directional IP tunneling interface.