Line card chassis, multi-chassis cluster router, and packet processing

Patent metadata

Field	Value
Publication number	US-10735839-B2
Application number	US-201615778458-A
Country	US
Kind code	B2
Filing date	Nov 24, 2016
Priority date	Nov 24, 2015
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

Disclosed is a line card chassis which includes line card units, optical electrical conversion units and optical fiber interface units. The optical-electrical conversion unit has an onboard optical assembly module used for mutual conversion between an optical signal and an electrical signal; an electrical signal interface of the onboard optical assembly module is connected to the line card unit through an electrical connector, and an optical signal interface of the onboard optical assembly module is connected to the optical fiber interface unit through an optical connector; and the optical fiber interface unit couples the optical signal to a cluster interface of a panel on a router through an optical fiber, and the cluster interface is to concatenate different chassis in the router. Also disclosed is a multi-chassis cluster router and a packet processing method.

First claim

The invention claimed is:

1. A line card chassis, wherein, the line card chassis comprises line card units, optical-electrical conversion units, optical fiber interface units, and a cluster interface; and
wherein a respective optical-electrical conversion unit has an onboard optical assembly module used for mutual conversion between an optical signal and an electrical signal; an electrical signal interface of the onboard optical assembly module is connected to a respective line card unit through an electrical connector to transmit the electrical signal, and an optical signal interface of the onboard optical assembly module is connected to a respective optical fiber interface unit through an optical connector to transmit the optical signal; and the respective optical fiber interface unit couples the optical signal to the cluster interface of a panel on a router through an optical fiber, and the cluster interface is to concatenate different chassis in the router.

2. The line card chassis of claim 1 , wherein the line card units comprise packet processing modules; and
wherein a respective cluster interface has signal transmission channels with all the packet processing modules in the line card chassis; and/or a respective packet processing module in the line card chassis has signal transmission channels with all cluster interfaces in the line card chassis.

3. The line card chassis of claim 2 , wherein the respective cluster interface has signal transmission channels with all the optical-electrical conversion units in the line card chassis; and/or the respective packet processing module in the line card chassis has signal transmission channels with all the optical-electrical conversion units in the line card chassis.

4. The line card chassis of claim 1 , wherein the line card chassis further comprises fan units; and the line card chassis adopts a 3-level slot structure where a respective line card unit or a respective optical fiber interface unit occupies a first-level slot, a respective optical-electrical conversion unit occupies a second-level slot, and a fan unit occupies a third-level slot; and the respective line card unit and the respective optical-electrical conversion unit are connected using an orthogonal electrical connection without a back board, and the respective optical fiber interface unit and the respective optical-electrical conversion unit use an optical connection.

5. The line card chassis of claim 1 , wherein, on an electrical signal transmission path from the onboard optical assembly module to the respective line card unit, a signal conditioning circuit is comprised.

6. The line card chassis of claim 1 , wherein the respective optical-electrical conversion unit further comprises an optical cross interconnection module; and the optical cross interconnection module performs a connection for optical signals between the optical connector and the onboard optical assembly module.

7. The line card chassis of claim 6 , wherein the optical cross interconnection module is a multi-cord breakout optical fiber or shuffle.

8. A multi-chassis cluster router, comprising a central switch fabric chassis and the line card chassis according to claim 1 , and the central switch fabric chassis and the line card chassis are connected through optical fibers; and the central switch fabric chassis performs a first route selection among different line card units within a same line card chassis and performs a second route selection among different line card chassis.

9. The multi-chassis cluster router of claim 8 , wherein the central switch fabric chassis comprises a first type of route selection units and a second type of route selection units; wherein the second type of route selection units connect cluster interfaces and the first type of route selection units to perform route selections from cluster interfaces in the same line card chassis to the first type route selection units or from the first type of route selection units to the cluster interfaces; and the first type of route selection units are connected with the second type of route selection units to perform route selections of the second type of route selection units among the different line card chassis.

10. A packet processing method, wherein the method is applied by the multi-chassis cluster router of claim 9 , comprising the following steps:
performing, by a line card unit of an ingress line card chassis, packet processing in a packet ingress direction, and transmitting a packet to an optical-electrical conversion unit of the ingress line card chassis;
converting, by the respective optical-electrical conversion unit, the electrical signal into the optical signal, and transmitting the optical signal to the central switch fabric chassis;
performing, by the central switch fabric chassis, packet switching, and converting, by an ingress interface of the central switch fabric chassis, the optical signal into the electrical signal, and finding a destination line card chassis based on a header of the packet, and converting, by an egress interface of the central switch fabric chassis, the electrical signal into the optical signal and transmitting the optical signal to a destination line card chassis;
converting, by an optical-electrical conversion unit of the destination line card chassis, the optical signal into the electrical signal and transmitting the electrical signal to a destination line card unit; and performing, by the destination line card unit, packet processing in a packet egress direction and sending out the packet.

11. The multi-chassis cluster router of claim 8 , wherein the line card units comprise packet processing modules; and
wherein a respective cluster interface has signal transmission channels with all the packet processing modules in the line card chassis; and/or a respective packet processing module in the line card chassis has signal transmission channels with all cluster interfaces in the line card chassis.

12. The multi-chassis cluster router of claim 11 , wherein the respective cluster interface has signal transmission channels with all the optical-electrical conversion units in the line card chassis; and/or the respective packet processing module in the line card chassis has signal transmission channels with all the optical-electrical conversion units in the line card chassis.

13. The multi-chassis cluster router of claim 8 , wherein the line card chassis further comprises fan units; and the line card chassis adopts a 3-level slot structure where a respective line card unit or a respective optical fiber interface unit occupies a first-level slot, a respective optical-electrical conversion unit occupies a second-level slot, and a respective fan unit occupies a third-level slot; and the respective line card unit and the respective optical-electrical conversion unit are connected using an orthogonal electrical connection without a back board, and the respective optical fiber interface unit and the respective optical-electrical conversion unit use an optical connection.

14. The multi-chassis cluster router of claim 8 , wherein, on an electrical signal transmission path from the onboard optical assembly module to the line card unit, a signal conditioning circuit is comprised.

15. The multi-chassis cluster router of claim 8 , wherein the respective optical-electrical conversion unit further comprises an optical cross interconnection module; and the optical cross interconnection module performs a connection for optical signals between the optical connector and the onboard optical assembly module.

16. The multi-chassis cluster router of claim

Assignees

• New H3C Tech Co Ltd

Inventors

• Yang Wu

Classifications

• H04Q11/00 Primary

  Selecting arrangements for multiplex systems (multiplex systems H04J) · CPC title

• H04Q11/06

  Time-space-time switching · CPC title

• H04Q1/04

  Frames or mounting racks for selector switches; Accessories therefor, e.g. frame cover · CPC title

• H04Q11/0005

  Switch and router aspects · CPC title

• H04Q1/50

  Conversion between different kinds of signals · CPC title