Load switch command including identification of source server cluster and target server custer

Patent metadata

Field	Value
Publication number	US-2017201573-A1
Application number	US-201715429466-A
Country	US
Kind code	A1
Filing date	Feb 10, 2017
Priority date	Jun 9, 2013
Publication date	Jul 13, 2017
Grant date	—

Abstract

A software defined network (SDN) controller sends a load switch command to a network device. The load switch command includes identification of a source server cluster and identification of a target server cluster.

First claim

What is claimed is:

1 . A method for transferring access across clusters, comprising:
receiving, by a network device, a load switch command from a software defined network (SDN) controller, wherein the load switch command includes identification of a source server cluster and identification of a target server cluster, wherein the source server cluster and the target server cluster belong to a server cluster group; and performing a switch processing mode for the source server cluster; wherein the process of performing a switch processing mode comprises: receiving a packet for accessing the source server cluster; determining whether the packet belongs to a session which has already been established for the source server cluster, and based on the determination the packet belongs to a session which has already been established for the source server cluster, forwarding the packet to the source server cluster.

2 . The method of claim 1 comprising:
periodically receiving a session list of the source server cluster from the SDN controller.

3 . The method of claim 1 comprising:
creating a record in a proxy session table based on the external host accessing the target server cluster by proxy;
receiving a load switch-back command from the SDN controller;
performing a switch-back processing mode for a first server cluster based on an identification of the first server cluster in the load switch-back command; wherein the process of performing the switch-back processing mode comprises:
receiving a packet from an external host to request access the source service cluster;
determining if the packet matches with a record in the proxy session table; and
in response to the determination the packet matches with a record in the proxy session table, acting as proxy for the external host to access the target server cluster.

4 . The method of claim 1 wherein based on the determination the packet does not belong to the session, acting as proxy for an external host to access the target server cluster.

5 . A non-transitory computer readable storage medium on which is stored machine readable instructions that when executed by a processor cause the processor to:
receive a load switch command from a software defined networks (SDN) controller, wherein the load switch command has identification of a source server cluster and identification of a target server cluster, wherein the source server cluster and the target server cluster belong to a server cluster group; perform a switch processing mode for the source server cluster; receive a packet for access the source server cluster; determine whether the packet is a session which has already been established for the source server cluster; and in response to the determination the packet is a session which has already been established for the source server cluster, forward the packet to the source server cluster.

6 . The non-transitory computer readable storage medium according to claim 5 , wherein the machine readable instructions further cause the processor to:
periodically receive session list of the source server cluster from the SDN controller.

7 . The non-transitory computer readable storage medium according to claim 6 , wherein the machine readable instructions further cause the processor to:
create a record in a proxy session table when the external host accesses the target server cluster by proxy; receive a load switch-back command from the SDN controller, perform a switch-back mode for a first server cluster based on an identification of the first server cluster in the load switch-back instruction; and determine whether a packet matches with a record in the proxy session table when the packet is received from the external host to access the source server cluster in the switch-back mode, and based on the determination the packet matches with a record in the proxy session table, act as a proxy for the external host to access the target server cluster.

Assignees

• Hewlett Packard Entpr Dev Lp

Inventors

• Yang Qi

Classifications

• H04L43/16

  Threshold monitoring · CPC title

• H04L12/6418 Primary

  Hybrid transport · CPC title

• H04L67/1008

  based on parameters of servers, e.g. available memory or workload (monitoring of computer activity G06F11/30) · CPC title

• H04L47/125

  by balancing the load, e.g. traffic engineering · CPC title

• H04L49/50

  Overload detection or protection within a single switching element · CPC title