US 2014/0280467 A1Published application

Method of managing port dhcp server protocol addresses

AssigneeEverfocus Electronics Corp.

InventorChia-Ming HUANG

Life of this patent

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Abstract

A method of managing port DHCP server protocol addresses is provided, applicable to switch hub. The port DHCP server connects to at least a port and includes port IP address allocation table. When the port try to connect, port DHCP is given priority to receive DHCP discovery message broadcast from port and respond to client. The client can use the default IP address provided by port DHCP server, instead of waiting for floating IP address provided by other DHCP server. When the hardware connected to port is replaced or reset, the hardware automatically obtains default IP address of port. When the port is connected to more than one device with IP, the method allows first device to obtain default IP address of port and other devices automatically obtains floating IP address provided by other DHCP server to shorten waiting time and provide convenient management of each port connection.

Claims9

Dependent claims

A method of managing port DHCP server protocol addresses, the port DHCP server being connected to at least a port, the port DHCP server being disposed with a port IP address allocation table, and the port IP address allocation table comprising default mapping between a port and IP address, the method comprising the steps of:

detecting a port:
when at least a port changing from disconnection state to connection state, the client broadcasting DHCP discovery message packet from the port to search for IP address given by other DHCP server;
rushing to respond:
when the port DHCP server being given priority to receive DHCP discovery message packet, the port DHCP server rushing to block other DHCP server from issuing DHCP offer message packet, and searching the disposed port IP address allocation table for default IP address of the port, and the port DHCP server giving priority to respond a DHCP offer message packet to the client, and the DHCP offer message packet including the default IP address of the port;
the client requesting:
when the client receiving DHCP offer message packet, the client broadcasting a DHCP request message packet from the port to the port DHCP server and other DHCP server so that the other DHCP server being informed of the client having selected the default IP address provided by the port DHCP server, and
the port DHCP server acknowledging:
when the port DHCP server receiving the DHCP request message packet broadcast by the client, the port DHCP server issuing a DHCP Ack message packet including the default IP address of the port and other configuration settings to the client so as to accomplish the address allocation.

5 more elements

A method of managing port DHCP server protocol addresses, the port DHCP server being connected to at least a port, and the port DHCP server being disposed with a port IP address allocation table, the port IP address allocation table comprising default mapping between the port and IP address;

the method comprising the steps of:
detecting a port:
when the at least a port being in connection state, the client broadcasting a DHCP discovery message packet from time to time to the port DHCP server and other DHCP server;
determining address:
after the port DHCP server receiving the broadcast DHCP discovery message packet, the port DHCP server 10 checking a MAC address in the DHCP discovery message packet to determine whether the MAC address being the same as a MAC address originally allocated to the client;
rushing to respond:
when the MAC address being the same as the original MAC address allocated to the client, the port DHCP server being given priority to respond to the client with a DHCP offer message packet including default IP address of the port;
the client requesting:
when the client receiving DHCP offer message packet, the client broadcasting a DHCP request message packet from the port to the port DHCP server and other DHCP server so that the other DHCP server being informed of the client having selected a default IP address provided by the port DHCP server;
and
the port DHCP server acknowledging:
when the port DHCP server receiving the DHCP request message packet broadcast by the client, the port DHCP server issuing a DHCP Ack message packet including the default IP address of the port and other configuration settings to the client so as to accomplish the address allocation.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/801,045Filed 13 Mar 2013
Published: 18 Sep 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04L 61/5014
Internet protocol [IP] addresses: using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
H04L 61/103
Of different types: across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
H04L 2101/663
Details of network addresses: transport layer addresses, e.g. aspects of transmission control protocol [TCP] or user datagram protocol [UDP] ports
H04L
Digital communication