Communication device and method of controlling the same

• US 20020159448A1
• Filed: 09/20/2001
• Published: 10/31/2002
• Est. Priority Date: 04/26/2001
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ito, Yuji, Izaiku, Noritake
• Granted Patent: US 7,245,618 B2
• Time in Patent Office: Days
• US Class Current: 370/389
• CPC Class Codes: H04L 2101/663 Transport layer addresses, e.g. aspects of transmission control protocol [TCP] or user datagram protocol [UDP] ports
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming

Abstract

A communication device includes a first part transmitting information to and receiving information from an adjacent device, a second part managing address information of all mounting ports of the communication device, a first port of the adjacent device, and a network to be constructed, the first port being connected to the communication device, a third part automatically determining addresses for the mounting ports of the communication device and the first port of the adjacent device so that the addresses are not duplicated; and a fourth part managing address determination authority to determine the addresses.

Claims

1. A communication device comprising:

a first part transmitting information to and receiving information from an adjacent device;

a second part managing address information of all mounting ports of the communication device, a first port of the adjacent device, and a network to be constructed, the first port being connected to the communication device;

a third part automatically determining addresses for the mounting ports of the communication device and the first port of the adjacent device so that the addresses are not duplicated; and

a fourth part managing address determination authority to determine the addresses.

2. The communication device as claimed in claim 1, further comprising a fifth part automatically selecting an unused one from addresses on a network including a port to which a terminal is connected, the port being one of the mounting ports of the communication device or a second port of the adjacent device.

3. The communication device as claimed in claim 2, further comprising a sixth part selecting one of the communication device and the adjacent device as a managing device performing centralized management of addresses of terminals on the network,

wherein said fifth part sets a DHCP server function in the communication device if the sixth part selects the communication device as the managing device and the sixth part establishes tunnel connection to the adjacent device if the sixth part selects the adjacent device as the managing device.

4. The communication device as claimed in claim 1, further comprising a fifth part resetting the addresses if the addresses are exhausted.

5. The communication device as claimed in claim 1, further comprising a fifth part determining addresses for connecting the network constructed by dynamic address assignment and an existing network constructed by static address assignment based on configuration information.

6. The communication device as claimed in claim 1, further comprising a fifth part constructing configuration information of the communication device based on configuration information including address information preset for the mounting ports.

7. The communication device as claimed in claim 1, further comprising a fifth part controlling a defect of one of the communication device and the adjacent device which one manages the address determination authority.

8. The communication device as claimed in claim 1, further comprising a fifth part selecting one of the communication device and the adjacent device as a device performing centralized management of addresses of terminals on the network.

9. A communication device control method comprising the step of:

(a) determining automatically addresses for all mounting ports of a communication device having address determination authority to determine the addresses and a first port of an adjacent device connected to the communication device through the first port so that the addresses are not duplicated,

wherein address information of the mounting ports of the communication device, the first port the adjacent device, and a network to be constructed is managed, the network including the communication device and the adjacent device.

10. The method as claimed in claim 9, further comprising the step of (b) selecting automatically an unused one from addresses on a network including a port to which a terminal is connected, the port being one of the mounting ports of the communication device or a second port of the adjacent device.

11. The method as claimed in claim 10, further comprising the step of (c) selecting one of the communication device and the adjacent device as a managing device performing centralized management of addresses of terminals on the network,

wherein said step (b) sets a DHCP server function in the communication device if said step (c) selects the communication device as the managing device and said step (c) establishes tunnel connection to the adjacent device if said step (c) selects the adjacent device as the managing device.

12. The method as claimed in claim 9, wherein said step (a) comprises the step of (b) resetting the addresses if the addresses are exhausted.

13. The method as claimed in claim 9, wherein said step (a) comprises the step of (b) determining addresses for connecting the network constructed by dynamic address assignment and an existing network constructed by static address assignment based on configuration information.

14. The method as claimed in claim 9, wherein said step (a) comprises the step of (b) constructing configuration information of the communication device based on configuration information including address information preset for the mounting ports.

15. The method as claimed in claim 9, wherein said step (a) comprises the step of (b) controlling a defect of one of the communication device and the adjacent device which one manages the address determination authority.

16. The method as claimed in claim 9, further comprising the step of (b) selecting one of the communication device and the adjacent device as a device performing centralized management of addresses of terminals on the network.