Gateway apparatus and its controlling method

• US 20030154297A1
• Filed: 02/07/2003
• Published: 08/14/2003
• Est. Priority Date: 02/08/2002
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hayashi, Tsunemasa, Nishida, Yukikuni, Suzuki, Hiroki
• Granted Patent: US 7,249,194 B2
• Time in Patent Office: Days
• US Class Current: 709/229
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/085 specially adapted for interworking of IP-based networks with other networks
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/167 Adaptation for transition between two IP versions, e.g. between IPv4 and IPv6 translation of Internet protocol [IP] addresses H04L61/2503
• CPC Class Codes: H04L 69/168 specially adapted for link layer protocols, e.g. asynchronous transfer mode [ATM], synchronous optical network [SONET] or point-to-point protocol [PPP]
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

IPoE/PPPoE forwarding table 106 is provided with which registered are network addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE, a protocol type is selected corresponding to a network address in IPoE/PPPoE forwarding table 106 that matches a destination IP address included in header information of an IP packet of an input frame, and when the selected protocol type is PPPoE, a PPPoE session is further selected from a retrieval index corresponding to the network address.

Claims

1. A gateway apparatus comprising:

an IPoE/PPPoE forwarding table with which registered are network addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE;

a PPPoE session table with which registered are the retrieval indexes, destination MAC addresses and PPPoE session IDs; and

an ARP table with which registered are destination IP addresses and destination MAC addresses; and

a control section that controls output of an input frame using information registered with the IPoE/PPPoE forwarding table, the PPPoE session table, and the ARP table,

wherein the control section selects a protocol type corresponding to a network address in the IPoE/PPPoE forwarding table that matches a destination IP address included in header information of an IP packet of the input frame,

and when the protocol type selected is IPoE, controls output of an IPoE frame based on a destination IP address corresponding to the network address or a destination MAC address in the ARP table in relation to the destination IP address included in the header information, while when the protocol type selected is PPPoE, controlling output of a PPPoE frame based on a destination MAC address and a PPPoE session ID in the PPPoE session table in relation to a retrieval index corresponding to the network address.

2. The gateway apparatus according to claim 1, wherein when a PPPoE frame is input and an entry that matches header information of the PPPoE frame is registered with the PPPoE session table, the control section compares a destination IP address included in the header information of an IP packet of the PPPoE frame with each of the network addresses in the IPoE/PPPoE forwarding table, while when an IPoE frame is input, comparing a destination IP address included in header information of an IP packet of the IPoE frame with each of the network addresses in the IPoE/PPPoE forwarding table.

3. The gateway apparatus according to claim 1, further comprising:

a default route table with which registered are source IP addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE,

wherein when a destination IP address included in header information of an IP packet of the input frame matches a network address registered as a default route in the IPoE/PPPoE forwarding table, the control section selects a protocol type corresponding to a source IP address in the default route table that matches a source IP address included in the header information, and when the protocol type selected is IPoE, controls output of an IPoE frame based on a destination IP address corresponding to the source IP address or a destination MAC address in the ARP table in relation to the destination IP address included in the header information, while when the protocol type selected is PPPoE, controlling output of a PPPoE frame based on a destination MAC address and a PPPoE session ID in the PPPoE session table in relation to a retrieval index corresponding to the source IP address.

5. The gateway apparatus according to claim 1, further comprising:

a PPPoE proxy table with which registered are source MAC addresses and PPPoE session IDs on input side and destination MAC addresses and PPPoE session IDs on output side;

wherein when a PPPoE frame is input and an entry that matches header information of the PPPoE frame is registered with the PPPoE proxy table, the control section controls output of the PPPoE frame based on a destination MAC address and a PPPoE session ID on the output side registered with the entry, while when a PPPoE frame is input, an entry that matches header information of the PPPoE frame is not registered with the PPPoE proxy table, and an entry that matches the header information of the PPPoE frame is registered with the PPPoE session table, comparing a destination IP address included in the header information of an IP packet of the PPPoE frame with each of the network addresses in the IPoE/PPPoE forwarding table.

4. A gateway apparatus comprising:

an IPoE forwarding table with which registered are network addresses and destination IP addresses;

a PPPoE proxy table with which registered are source MAC addresses and PPPoE session IDs on input side and destination MAC addresses and PPPoE session IDs on output side;

an ARP table with which registered are destination IP addresses and destination MAC addresses; and

a control section that controls output of an input frame using the IPoE forwarding table, the PPPoE proxy table and the ARP table,

wherein when a PPPoE frame is input and an entry that matches header information of the PPPoE frame is registered with the PPPoE proxy table, the control section controls output of the PPPoE frame based on a destination MAC address and a PPPoE session ID on the output side registered with the entry, while when an IPoE frame is input, selecting a destination IP address in relation to a network address in the IPoE forwarding table that matches another destination IP address included in header information of an IP packet of the IPoE frame, and controlling output of the IPoE frame based on the destination IP address or a destination MAC address in the ARP table in relation to the another destination IP address included in the header information.

6. A control method of a gateway apparatus having an IPoE/PPPoE forwarding table with which registered are network addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE, a PPPoE session table with which registered are the retrieval indexes, destination MAC addresses and PPPoE session IDs, and an ARP table with which registered are destination IP addresses and destination MAC addresses, the method comprising:

selecting a protocol type corresponding to a network address in the IPoE/PPPoE forwarding table that matches a destination IP address included in header information of an IP packet of an input frame;

controlling output of an IPoE frame based on a destination IP address corresponding to the network address or a destination MAC address in the ARP table in relation to the destination IP address included in the header information, when the protocol type selected is IPoE; and

controlling output of a PPPoE frame based on a destination MAC address and a PPPoE session ID in the PPPoE session table in relation to a retrieval index corresponding to the network address, when the protocol type selected is PPPoE.

7. The control method of the gateway apparatus according to claim 6, wherein when a PPPoE frame is input and an entry that matches header information of the PPPoE frame is registered with the PPPoE session table, a destination IP address included in the header information of an IP packet of the PPPoE frame is compared with each of the network addresses in the IPoE/PPPoE forwarding table, while when an IPoE frame is input, a destination IP address included in header information of an IP packet of the IPoE frame is compared with each of the network addresses in the IPoE/PPPoE forwarding table.

8. The control method of the gateway apparatus according to claim 6, wherein the gateway apparatus further has a default route table with which registered are source IP addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE,

a protocol type is selected corresponding to a source IP address in the default route table that matches a source IP address included in header information, when a destination IP address included in the header information of an IP packet of the input frame matches a network address registered as a default route in the IPoE/PPPoE forwarding table, and

when the protocol type selected is IPoE, output of an IPoE frame is controlled based on a destination IP address corresponding to the source IP address or a destination MAC address in the ARP table in relation to the destination IP address included in the header information, while when the protocol type selected is PPPoE, output of a PPPoE frame is controlled based on a destination MAC address and a PPPoE session ID in the PPPoE session table in relation to a retrieval index corresponding to the source IP address.

10. The control method of the gateway apparatus according to claim 6, wherein the gateway apparatus further has a PPPoE proxy table with which registered are source MAC addresses and PPPoE session IDs on input side and destination MAC addresses and PPPoE session IDs on output side,

output of a PPPoE frame is controlled based on a destination MAC address and a PPPoE session ID on the output side registered with an entry when the PPPoE frame is input and the entry that matches header information of the PPPoE frame is registered with the PPPoE proxy table, while when a PPPoE frame is input, an entry that matches header information of the PPPoE frame is not registered with the PPPoE proxy table, and an entry that matches the header information of the PPPoE frame is registered with the PPPoE session table, a destination IP address included in the header information of an IP packet of the PPPoE frame is compared with each of the network addresses in the IPoE/PPPoE forwarding table.

9. A control method of a gateway apparatus having an IPoE forwarding table with which registered are network addresses and destination IP addresses, a PPPoE proxy table with which registered are source MAC addresses and PPPoE session IDs on input side and destination MAC addresses and PPPoE session IDs on output side, and an ARP table with which registered are destination IP addresses and destination MAC addresses, the method comprising:

controlling output of a PPPoE frame based on a destination MAC address and a PPPoE session ID on the output side registered with an entry, when the PPPoE frame is input and the entry that matches header information of the PPPoE frame is registered with the PPPoE proxy table; and

selecting a destination IP address in relation to a network address in the IPoE forwarding table that matches another destination IP address included in header information of an IP packet of an IPoE frame when the IPoE frame is input, and controlling output of the IPoE frame based on the destination IP address or a destination MAC address in the ARP table in relation to the another destination IP address included in the header information.

11. A program for a gateway apparatus having an IPoE/PPPoE forwarding table with which registered are network addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE, a PPPoE session table with which registered are the retrieval indexes, destination MAC addresses and PPPoE session IDs, and an ARP table with which registered are destination IP addresses and destination MAC addresses, the program making a computer execute the procedures of:

selecting a protocol type corresponding to a network address in the IPoE/PPPoE forwarding table that matches a destination IP address included in header information of an IP packet of an input frame;

controlling output of an IPoE frame based on a destination IP address corresponding to the network address or a destination MAC address in the ARP table in relation to the destination IP address included in the header information, when the protocol type selected is IPoE; and

controlling output of a PPPoE frame based on a destination MAC address and a PPPoE session ID in the PPPoE session table in relation to a retrieval index corresponding to the network address, when the protocol type selected is PPPoE.

12. The program for the gateway apparatus according to claim 11, further comprising:

comparing a destination IP address included in header information of an IP packet of a PPPoE frame with each of the network addresses in the IPoE/PPPoE forwarding table when the PPPoE frame is input and an entry that matches the header information of the PPPoE frame is registered with the PPPoE session table; and

comparing a destination IP address included in header information of an IP packet of an IPoE frame with each of the network addresses in the IPoE/PPPoE forwarding table when the IPoE frame is input.

13. The program for the gateway apparatus according to claim 11, wherein the gateway apparatus further has a default route table with which registered are source IP addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE, and the program further makes the computer execute the procedures of:

selecting a protocol type corresponding to a source IP address in the default route table that matches a source IP address included in header information, when a destination IP address included in the header information of an IP packet of the input frame matches a network address registered as a default route in the IPoE/PPPoE forwarding table; and

controlling, when the protocol type selected is IPoE, output of an IPoE frame based on a destination IP address corresponding to the source IP address or a destination MAC address in the ARP table in relation to tsdhe destination IP address included in the header information; and

controlling, when the protocol type selected is PPPoE, output of a PPPoE frame based on a destination MAC address and a PPPoE session ID in the PPPoE session table in relation to a retrieval index corresponding to the source IP address.

15. The program for the gateway apparatus according to claim 11, wherein the gateway apparatus further has a PPPoE proxy table with which registered are source MAC addresses and PPPoE session IDs on input side and destination MAC addresses and PPPoE session IDs on output side, and the program further makes the computer execute the procedures of controlling output of a PPPoE frame based on a destination MAC address and a PPPoE session ID on the output side registered with an entry when the PPPoE frame is input and the entry that matches header information of the PPPoE frame is registered with the PPPoE proxy table, and when a PPPoE frame is input, an entry that matches header information of the PPPoE frame is not registered with the PPPoE proxy table, and an entry that matches the header information of the PPPoE frame is registered with the PPPoE session table, comparing a destination IP address included in the header information of an IP packet of the PPPoE frame with each of the network addresses in the IPoE/PPPoE forwarding table.

14. A program for a gateway apparatus having an IPoE forwarding table with which registered are network addresses and destination IP addresses, a PPPoE proxy table with which registered are source MAC addresses and PPPoE session IDS on input side and destination MAC addresses and PPPoE session IDs on output side, and an ARP table with which registered are destination IP addresses and destination MAC addresses, the program making a computer execute the procedures of:

controlling output of a PPPoE frame based on a destination MAC address and a PPPoE session ID on the output side registered with an entry, when the PPPoE frame is input and the entry that matches header information of the PPPoE frame is registered with the PPPoE proxy table; and

selecting a destination IP address in relation to a network address in the IPoE forwarding table that matches another destination IP address included in header information of an IP packet of an IPoE frame when the IPoE frame is input, and controlling output of the IPoE frame based on the destination IP address or a destination MAC address in the ARP table in relation to the another destination IP address included in the header information.