SWITCH DEVICE, NETWORK SYSTEM, AND SWITCH DEVICE CONTROL METHOD

• US 20150256458A1
• Filed: 02/09/2015
• Published: 09/10/2015
• Est. Priority Date: 03/05/2014
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: SHIRAKI, OSAMU
• Granted Patent: US 9,450,892 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 49/3009 Header conversion, routing tables or routing tags
• CPC Class Codes: H04L 49/357 Fibre channel switches

Abstract

A switch device includes: a first relay circuit deciding a transmission port to which the frame of the first communication is output, when the received frame is the first communication; a processor deciding a transmission port corresponding to a destination address of the received frame, and generating a second relay table including information for identifying the transmission port corresponding to the destination address of the received frame; and a second relay circuit deciding a transmission port to which the frame of the second communication is output, as the transmission port to which the frame of the second communication is output, a transmission port corresponding to the destination address of the received frame among the plurality of ports on the basis of the content of the second relay table, when the port that has received the frame of the second communication is an end port.

Claims

1. A switch device including a plurality of ports, the switch device comprising:

a determination circuit configured to determine whether a received frame is either a first communication or a second communication;

a first relay circuit configured to decide a transmission port to which the frame of the first communication is output, among the plurality of ports, on the basis of content of a first relay table when the determination circuit determines that the received frame is the first communication;

a processor configured to decide a transmission port corresponding to a destination address of the received frame among the plurality of ports, and to generate a second relay table including information for identifying the transmission port corresponding to the destination address of the received frame; and

a second relay circuit configured to decide a transmission port to which the frame of the second communication is output, on the basis of content of the second relay table, or to decide, as the transmission port to which the frame of the second communication is output, a transmission port corresponding to the destination address of the received frame among the plurality of ports on the basis of the content of the second relay table, when the port that has received the frame of the second communication is an end port or a downstream port in a case where the received frame is the second communication.

2. The switch device according to claim 1, wherein

the processor decides an upstream port corresponding to each of the end port and the downstream port among the plurality of ports, and generates the second relay table further including information for identifying the upstream port corresponding to the end port or the downstream port, and

the second relay circuit decides, as the transmission port to which the frame of the second communication is output, the upstream port corresponding to the end port or the downstream port among the plurality of ports on the basis of the content of the second relay table when the port that has received the frame of the second communication is the end port or the downstream port, or the second relay circuit decides, as the transmission port to which the frame of the second communication is output, a transmission port corresponding to the destination address of the received frame among the plurality of ports on the basis of the content of the second relay table when the port that has received the frame of the second communication is neither the end port nor the downstream port, in the case where the received frame is the frame of the second communication.

3. The switch device according to claim 2, wherein

the upstream port corresponding to the end port or the downstream port is a port connected to a different switch device belonging to a same Storage Area Network (SAN) as a SAN to which the local switch device belongs.

4. The switch device according to claim 2, wherein

the first communication is a communication of Ethernet, and

the second communication is a communication of Fibre Channel over Ethernet (FCoE).

5. A network system where a plurality of switch devices are connected, wherein

each of the plurality of switch devices comprises:

a plurality of ports;

a determination circuit configured to determine whether a received frame is either a first communication or a second communication;

a first relay circuit configured to decide a transmission port to which the frame of the first communication is output, among the plurality of ports, on the basis of content of a first relay table when the determination circuit determines that the received frame is the first communication;

a processor configured to decide a transmission port corresponding to a destination address of the received frame among the plurality of ports, and to generate a second relay table including information for identifying the transmission port corresponding to the destination address of the received frame; and

a second relay circuit configured to decide a transmission port to which the frame of the second communication is output, among the plurality of ports, on the basis of content of the second relay table, or to decide, as the transmission port to which the frame of the second communication is output, a transmission port corresponding to the destination address of the received frame among the plurality of ports on the basis of the content of the second relay table, when the port that has received the frame of the second communication is an end port or a downstream port in a case where the received frame is the frame of the second communication.

6. The network system according to claim 5, wherein

the processor decides an upstream port corresponding to each of the end port and the downstream port among the plurality of ports, and generates the second relay table further including information for identifying the upstream port corresponding to the end port or the downstream port, and

the second relay circuit decides, as the transmission port to which the frame of the second communication is output, the upstream port corresponding to the end port or the downstream port among the plurality of ports on the basis of the content of the second relay table when the port that has received the frame of the second communication is the end port or the downstream port, or the second relay circuit decides, as the transmission port to which the frame of the second communication is output, a transmission port corresponding to the destination address of the received frame among the plurality of ports on the basis of the content of the second relay table when the port that has received the frame of the second communication is neither the end port nor the downstream port, in the case where the received frame is the frame of the second communication.

7. The network system according to claim 6, wherein

the upstream port corresponding to the end port or the downstream port is a port connected to a different switch device belonging to a same Storage Area Network (SAN) as a SAN to which the local switch device belongs.

8. The network system according to claim 6, wherein

the first communication is a communication of Ethernet, and

the second communication is a communication of Fibre Channel over Ethernet (FCoE).

9. A control method for a switch device including a plurality of ports, the method comprising:

determining whether a received frame is either a first communication or a second communication;

deciding a transmission port, to which the frame of the first communication is output, among the plurality of ports on the basis of content of a first relay table when it is determined that the received frame is the first communication;

deciding a transmission port corresponding to a destination address of the received frame;

generating a second relay table including information for identifying the transmission port corresponding to the destination address of the received frame; and

deciding a transmission port to which the frame of the second communication is output, on the basis of content of the second relay table, or deciding, as the transmission port to which the frame of the second communication is output, a transmission port corresponding to the destination address of the received frame among the plurality of ports on the basis of the content of the second relay table, when the port that has received the frame of the second communication is an end port or a downstream port in a case where the received frame is the second communication.

10. The control method according to claim 9, further comprising:

deciding an upstream port corresponding to each of the end port and the downstream port among the plurality of ports; and

generating the second relay table further including information for identifying the upstream port corresponding to the end port or the downstream port;

wherein

in the deciding a transmission port to which the frame of the second communication is output, the upstream port corresponding to the end port or the downstream port among the plurality of ports is decided as the transmission port to which the frame of the second communication is output, on the basis of the content of the second relay table when the port that has received the frame of the second communication is the end port or the downstream port, or a transmission port corresponding to the destination address of the received frame among the plurality of ports is decided as the transmission port to which the frame of the second communication is output, on the basis of the content of the second relay table when the port that has received the frame of the second communication is neither the end port nor the downstream port.

11. The control method according to claim 10, wherein

the upstream port corresponding to the end port or the downstream port is a port connected to a different switch device belonging to a same Storage Area Network (SAN) as a SAN to which the local switch device belongs.

12. The control method according to claim 10, wherein

the first communication is a communication of Ethernet, and

the second communication is a communication of Fibre Channel over Ethernet (FCoE).