SWITCHING FRAME AND ROUTER CLUSTER

• US 20100118867A1
• Filed: 01/21/2010
• Published: 05/13/2010
• Est. Priority Date: 07/27/2007
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Yang, Lu, Zang, Dajun, Yang, Dongcheng, Pu, Zhengjie, Gai, Gang, Zhou, Da, Fan, Lingqiang, Du, Wenhua
• Granted Patent: US 8,743,733 B2
• Time in Patent Office: Days
• US Class Current: 370/359
• CPC Class Codes: H04L 12/56 Packet switching systems
• CPC Class Codes: H04L 45/583 Stackable routers
• CPC Class Codes: H04L 49/1515 Non-blocking multistage, e.g. Clos
• CPC Class Codes: H04L 49/45 Arrangements for providing or supporting expansion

Abstract

A switching chassis includes more than one cascade unit and more than one switching unit, where: the cascade units have cascade interfaces to connect line processing chassis; the switching units have switching ports to connect the cascade interfaces; and any cascade interface of any cascade unit is connected to one switching port of any switching unit. A router cluster with the above switching chassis includes switching chassis and line processing chassis interconnected via optical fibers, where: any optical interface of any line processing chassis is connected to one cascade interface of any cascade unit; and any cascade interface of any cascade unit is connected to one switching port of any switching unit. With the present invention, the capacity of a router cluster can be expanded without the need to replace any component of the router cluster so that the expansion cost is lower.

Claims

1. A switching chassis, comprising more than one cascade unit and more than one switching unit, wherein:

the cascade unit has cascade interfaces to connect line processing chassis;

the switching unit has switching ports to connect the cascade interfaces; and

any cascade interface of any cascade unit is connected to one switching port of any switching unit.

2. The switching chassis of claim 1, wherein any cascade interface of any cascade unit is connected to one switching port of any switching unit in orthogonal mode.

3. The switching chassis of claim 1, wherein the number of cascade units is M, which equals 2^j, where j is 0 or an integer above 0.

4. The switching chassis of claim 3, wherein each of the cascade units has N cascade interfaces, where N equals 2ⁱ and i is 0 or an integer above 0.

5. The switching chassis of claim 3, wherein each of the switching units has M×

N switching ports, where N equals 2ⁱ and i is 0 or an integer above 0.

6. A router cluster, comprising switching chassis and line processing chassis that are interconnected via optical fibers, wherein:

one switching chassis comprises more than one cascade units and more than one switching unit;

the cascade unit has cascade interfaces to connect the line processing chassis and any optical interface of any line processing chassis is uniquely connected to one cascade interface of any cascade unit; and

the switching unit has switching ports to connect the cascade interfaces and any cascade interface of any cascade unit is connected to one switching port of any switching unit.

7. The router cluster of claim 6, wherein any cascade interface of any cascade unit is connected to one switching port of any switching unit in orthogonal mode.

8. The router cluster of claim 6, wherein the number of cascade units is M, which equals 2^j, where j is 0 or an integer above 0.

9. The router cluster of claim 8, wherein each of the cascade units has N cascade interfaces, where N equals 2ⁱ and i is 0 or an integer above 0.

10. The router cluster of claim 8, wherein the number of switching units is M×

N, where N equals 2ⁱ and i is 0 or an integer above 0.