Method and Device for Preventing Repeated Refreshing of Address Table of Ethernet Ring Network Node

• US 20130028076A1
• Filed: 04/12/2010
• Published: 01/31/2013
• Est. Priority Date: 02/05/2010
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Wu, Shaoyong
• Granted Patent: US 8,948,002 B2
• Time in Patent Office: Days
• US Class Current: 370/222
• CPC Class Codes: H04L 12/40013 Details regarding a bus controller
• CPC Class Codes: H04L 12/437 Ring fault isolation or reconfiguration for SDH/SONET ring networks H04J3/085

Abstract

A method and a device for preventing repeated refreshing of an address table of an Ethernet ring network node are provided. After a state of a port of the Ethernet ring network node is changed to a blocked state, it is determined that whether the Ethernet ring network node is an RPL neighbor node and whether the blockage is triggered by an RPL Blocked protocol frame. If so, the Ethernet ring network node stores refreshed record information corresponding to its two ports on the ring. The problem that an RPL neighbor node refreshes an address table repeatedly in the scenario of switchback of an Ethernet ring network can be effectively solved via the aforementioned method and device, thereby reducing flow broadcast during protection switching of the Ethernet ring network and improving the switching efficiency.

Claims

1. A method for preventing repeated refreshing of an address table of an Ethernet ring network node, comprising:

determining, after a state of a port of the Ethernet ring network node is changed to a blocked state, whether the Ethernet ring network node is an Ring Protection Link (RPL) neighbor node and whether the blockage is triggered by an RPL Blocked (RPLB) protocol frame;

if so, storing, by the Ethernet ring network node, refreshed record information corresponding to its two ports on the ring.

2. The method according to claim 1, wherein the process of determining whether the Ethernet ring network node is the RPL neighbor node is realized via enquiring a node attribute of the Ethernet ring network node.

3. The method according to claim 1, wherein the process of determining whether the blockage is triggered by the RPLB protocol frame is realized via parsing a content of a received data structure.

4. The method according to claim 1, further comprising:

executing a subsequent operation according to an existing technology if the Ethernet ring network node is determined not to be an RPL neighbor node.

5. The method according to claim 1, further comprising:

executing a subsequent operation according to an existing technology if the blockage is not triggered by the RPLB protocol frame.

6. The method according to claim 1, wherein the refreshed record information comprises:

a node numbering, and an index numbering of a blocked port.

11. The method according to claim 2, further comprising:

executing a subsequent operation according to an existing technology if the Ethernet ring network node is determined not to be an RPL neighbor node.

12. The method according to claim 3, further comprising:

executing a subsequent operation according to an existing technology if the Ethernet ring network node is determined not to be an RPL neighbor node.

13. The method according to claim 2, further comprising:

executing a subsequent operation according to an existing technology if the blockage is not triggered by the RPLB protocol frame.

14. The method according to claim 3, further comprising:

executing a subsequent operation according to an existing technology if the blockage is not triggered by the RPLB protocol frame.

7. A device for preventing repeated refreshing of an address table of an Ethernet ring network node, comprising a blockage triggering detection unit and a refreshed record information maintenance unit connected to each other, wherein

the blockage triggering detection unit is configured to determine, after a state of a port of the Ethernet ring network node is changed to a blocked state, whether the Ethernet ring network node to which the blockage triggering detection unit itself belongs is a Ring Protection Link (RPL) neighbor node and whether the blockage is triggered by an RPL Blocked (RPLB) protocol frame, and send a determination result to the refreshed record information maintenance unit;

the refreshed record information maintenance unit is configured to save, when the Ethernet ring network node to which the blockage triggering detection unit itself belongs is the RPL neighbor node and the blockage is triggered by the RPLB protocol frame, refreshed record information corresponding to two ports of the Ethernet ring network node to which the refreshed record information maintenance unit itself belongs on the ring.

8. The device according to claim 7, wherein the blockage triggering detection unit comprises a node determination unit and a blockage reason determination unit, wherein

the node determination unit is configured to determine whether the Ethernet ring network node to which the node determination unit itself belongs is an RPL neighbor node and generate a determination result which can be sent to the refreshed record information maintenance unit;

the blockage reason determination unit is configured to determine whether the blockage operation is caused by a received RPLB protocol frame and generate a determination result which can be sent to the refreshed record information maintenance unit.

9. The device according to claim 8, wherein

the node determination unit and the blockage reason determination unit are configured to notify the refreshed record information maintenance unit of their respective generated determination results, or

a connection relationship exists between the node determination unit and the blockage reason determination unit, and the node determination unit and the blockage reason determination unit are configured such that one of the node determination unit and the blockage reason determination unit notifies its determination result to another one of the node determination unit and the blockage reason determination unit, to trigger the another one to make subsequent determination.

10. The device according to claim 7, wherein the refreshed record information comprises:

a node numbering, and an index numbering of a blocked port.