JP2001119399A - IPv6 NETWORK SYSTEM - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an IP network system for reducing the traffic of a network. SOLUTION: An IP packet editing generating part 7-1 of communication equipment 1-1 retrieves an ARP cache table 15-1 or uses ARP and provides a MAC address M200 corresponding to an IP address I200 of communication equipment 1-2. At such a time, the MAC address provided by the ARP is stored in the ARP cache table 15-1. The IP packet editing generating part 7-1 sets a MAC address identifier into an IPv6 extension header, sets the AC address M200 and a MAC address M100 of the communication equipment 1-1 into a payload, edits the IPv6 packet and sends it to the communication equipment 1-2. An IP packet analytic part 12-2 of the communication equipment 1-2 recognizes the MAC address identifier from the IPv6 extension header of the received IPv6 packet, extracts the MAC address M100 from the payload and stores it on an ARP cache table 15-2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an IP network system, and more particularly to an IPv6 as a communication protocol.
The present invention relates to an IP network system that communicates IPv6 packets by using an IP network.

[0002]

2. Description of the Related Art In a conventional IP network system, a conversion table for mapping an IP address to a physical address must be manually created and updated, and therefore, an ARP (Address Resolution Protocol) is used. , Using means to solve automatically.

[0003]

However, this prior art has the following problems.

The first problem is that when ARP is used,
This means that the information of the communication partner without message communication for a certain period of time, that is, the correspondence between the P address and the physical address is deleted. The reason is that the address conversion information held by the ARP is cache-managed by dynamic setting.

A second problem is that when ARP is used,
This means increasing network traffic. The reason is that an inquiry is made by broadcast (multicast) for address resolution, so that the network load increases.

[0006] An object of the present invention is to provide an IP network system which solves the above-mentioned conventional problems and reduces network traffic.

[0007]

An IPv6 network system according to the present invention comprises an IP (Internet Prot).
ocol) address and MAC (Media Accesses)
s Control: medium access control (cache control) storage means for storing a cache table representing a correspondence with an address; first address acquisition means for searching the cache table to obtain a MAC address from an IP address; and ARP (address resolution protocol) ) To obtain a MAC address from an IP address using the first address obtaining means, and obtain a MAC address from the IP address by preferentially using the first address obtaining means. When a MAC address cannot be obtained from the IP address, a physical address obtaining means for obtaining a MAC address from the IP address by the second address obtaining means; and a MAC address obtained by the second address obtaining means in the cache table storage means. Cash table First physical address registering means for registering a packet in a packet format;
IPv6 (Internet Prot) having a MAC address identifier which is a code for recognizing the C address, and having a MAC address obtained by the physical address obtaining means in a packet format payload.
ocol Version 6) packet editing and generating means for editing and generating a packet; packet transmitting means for transmitting the IPv6 packet edited and generated by the packet editing and generating means to a network; packet receiving means for receiving the IPv6 packet from the network. It is characterized by having.

Still further, in the IPv6 network system according to the present invention, the packet editing / generating means has a destination MAC address of the IPv6 packet and a source MAC address of the IPv6 packet in a payload of a packet format. Thus, the IPv6 packet is edited and generated.

Still further, in the IPv6 network system according to the present invention, the packet receiving means may: analyze an extension header of the IPv6 packet received from the network to recognize a MAC address identifier; IPv6 packet analysis means for extracting the MAC address from the payload; and second physical address registration means for registering the MAC address extracted from the payload in the cache table of the cache table storage means.

Still further, in the IPv6 network system according to the present invention, the packet receiving means may: edit the packet so that the IPv6 packet received from the network is a receipt confirmation notice for notifying a receipt confirmation. Receipt confirmation packet generation instructing means for instructing edit generation means; and reception confirmation packet transmission instructing means for instructing the packet transmission means to transmit the edited and generated reception confirmation notice IPv6 packet to the network. Features.

Still further, in the IPv6 network system according to the present invention, the packet receiving means receives an acknowledgment notification IPv6 packet transmitted through the network, and converts the received acknowledgment notification IPv6 packet into the IPv6 packet. Extracting a MAC address by the analyzing means and storing the MAC address in a cache table of the cache table storing means;
It is characterized by having physical address registration means.

Still further, in the IPv6 network system according to the present invention, a plurality of communication devices communicate with each other by IPv6 (In).
ternet Protocol Version6)
In the IPv6 network system that communicates via a network, the communication device includes a transmitting device, a receiving device, and an IP (Internet Protocol).
Address and MAC (Media Access Con)
troll: medium access control) having a cache table storage unit for storing a cache table representing a correspondence with an address, wherein the transmitting apparatus searches the cache table to obtain a MAC address from an IP address.
Address acquisition means and ARP (address resolution protocol)
Second to get the MAC address from the IP address using
Address obtaining means for obtaining a MAC address from an IP address by preferentially using the first address obtaining means.
When the C address cannot be obtained, the physical address obtaining means for obtaining the MAC address from the IP address by the second address obtaining means and the MAC address obtained by the second address obtaining means are stored in the cache table of the cache table storage unit. A first physical address registering means for registering, and a code MA for recognizing a MAC address in an extension header of a packet format.
IPv6 (Internet) having a C address identifier and a MAC address obtained by the physical address obtaining means in a payload of a packet format.
(Protocol Version 6) packet editing / generating means for editing / generating a packet, and packet transmitting means for transmitting the IPv6 packet edited / generated by the packet editing / generating means to a network, wherein the receiving device transmits the IPv6 packet from the network. Packet receiving means for receiving a packet; analyzing an extension header of the IPv6 packet received from the network to recognize a MAC address identifier;
IPv6 packet analysis means for extracting a MAC address from within the payload of six packets, second physical address registration means for registering the MAC address extracted from within the payload in the cache table of the cache table storage unit, I for notifying receipt confirmation to the received IPv6 packet
Reception confirmation packet generation instructing means for instructing the packet editing and generating means to edit and generate a Pv6 packet;
Receiving confirmation packet transmission instructing means for instructing the packet transmitting means to transmit the IPv6 packet for receiving confirmation notification to the network.

[0013]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a configuration block diagram of an embodiment of the present invention, FIG. 2 is a configuration diagram of an IPv6 packet format, and FIG. 3 is a configuration diagram of an ARP cache table.
FIG. 4 is an operation case diagram.

Referring to FIG. 1, a plurality of communication devices 1-1, 1-1
1-2, ... are IPv6 (Internet Prot)
ocol Version 6). IPv6 is an Internet protocol having an IP address length of 128 bits.

The communication device 1 includes a transmitting device 9 and a receiving device 1
0 and the ARP cache table storage device 14.

ARP cache table storage device 14
Stores the ARP cache table 15.

As shown in FIG. 3, the ARP cache table 15 stores an IP address 16 and a physical address M
6 is a table showing a correspondence relationship with an AC (Media Access Control) address 17.

The transmitting device 9 includes a transmission request receiving unit 6 and an IP
It has a packet edit generation unit 7 and an IP packet transmission control unit 8.

The transmission request receiving unit 6 receives data to be transmitted from a higher-level device (not shown).

The IP packet editing and generating unit 7 obtains data to be transmitted from the transmission request receiving unit 6 and
The MAC address corresponding to the IP address is obtained from the ARP cache table 15 or the ARP (Ad
dress Resolution Protocol
1: an address resolution protocol) to obtain a MAC address corresponding to the IP address, and edit and generate an IPv6 packet in the IPv6 packet format 20 shown in FIG. Here, ARP is a protocol for automatically converting an IP address to a MAC address which is a physical address.

The IPv6 packet format 20 is I
An IPv6 header 21, which is a header of the Pv6 packet;
It has an IPv6 extension header 22 and a payload 23.

In the payload 23, data to be transmitted and a MAC (Me
dia Access Control (medium access control) address 25. This MAC address 2
5 is a source MAC address 25-1, which is a MAC address of a communication device that sends out IPv6 packets, and
And a destination MAC address 25-2, which is the MAC address of the destination communication device that delivers the six packets.

The IPv6 extension header 22 has a MAC address identifier 24 which is a code for recognizing that the payload 23 includes the MAC address 25.

The IP packet transmission control unit 8 transmits the IPv6 packet generated by the IP packet edit generation unit 7 to the network 50.

The receiving device 10 has an IP packet reception control unit 13, an IP packet analysis unit 12, and a data reception notification unit 11.

The IP packet reception control unit 13 receives an IPv6 packet from the network 50,
The v6 packet is transmitted to the IP packet analysis unit 12.

The IP packet analyzer 12 receives the received IP
When the presence of the MAC address identifier 24 is recognized by examining the IPv6 extension header 22 of the v6 packet, the payload 23
The source MAC address 25-1 from the ARP
The source IP address and the source MAC address 25-1 are stored in the cache table 15. And IP
The packet analysis unit 12 transmits the data transmitted in the received IPv6 packet to the data reception notification unit 11. Further, the IP packet analyzer 12 receives the received IP
It instructs the transmitting device 9 to return an acknowledgment (ACK) to the transmitting communication device for the v6 packet.

The data reception notifying section 11 notifies the host device (not shown) of the received data.

Next, the operation of the embodiment of the present invention will be described in detail with reference to FIG. 4 and FIG. 1, FIG. 2 and FIG.

Communication device 1-1 (IP address: I10
0) transmits an IPv6 packet to the communication device 1-2 (IP address: I200), and the communication device 1-2 replies to the communication device 1-1.

In the transmission source communication device 1-1, the transmission request receiving unit 6-1 of the transmission device 9-1 transmits data to be transmitted from a higher-level device (not shown) and a transmission destination to which the data is transmitted. IP address of the communication device 1-2 of I200: I200
And the data and the IP address: I200
The packet is transmitted to the P packet edit generation unit 7-1.

When receiving the data to be transmitted and the IP address: I200 (step S1), the IP packet editing / generating unit 7-1 first searches the ARP cache table 15-1 (step S2), Address: Check whether there is a MAC address for I200 (step S3).

If the ARP cache table 15-1 includes a MAC address corresponding to the IP address: I200 (if high in step S3), the IP packet editing / generating unit 7-1 determines the MAC address, here,
This MAC address is obtained as M200 from the ARP cache table 15-1 (step S4).

On the other hand, the ARP cache table 15-1
If there is no MAC address for the IP address: I200 in the table (No in step S3),
The P packet edit generation unit 7-1 obtains a MAC address: M200 corresponding to the IP address: I200 using ARP (address resolution protocol) (Step S).
5) Then, the correspondence between the IP address: I200 and the MAC address: M200 is stored in the ARP cache table 15-1 (step S6).

Next, the IP packet editing / generating unit 7-1
Is an IPv6 packet format 2 as shown in FIG.
Edit and generate an IPv6 packet of No. 0 (step S
7). That is, the IP packet edit generation unit 7-1 outputs
A MAC address identifier 24, which is a code for recognizing a MAC address, is set in the Pv6 extension header 22, and the data to be transmitted and the MAC address of the communication device 1-1 of the transmission source are set in the payload 23. : M
100 (this is the source MAC address 25-1) and the acquired MAC address: M200 (this is
Destination MAC address 25-2).

Next, the IP packet edit generation unit 7-1
The IPv6 packet edited and generated as described above is delivered to the IP packet transmission control unit 8-1.

The IP packet transmission control section 8-1 transmits the IPv6 packet received from the IP packet editing / generating section 7-1 to the network 50 (Step S8).

Receiving device 10-2 in communication device 1-2
The IP packet reception control unit 13-2 of the network 5
The IPv6 packet is received from the IP packet analyzing unit 12-2 (step R1).
Send to

The IP packet analysis unit 12-2 checks the IPv6 extension header 22 of the received IPv6 packet and
When the existence of the C address identifier 24 is recognized (step R
2), from the payload 23, the source MAC address 25-
1. Here, take out the MAC address: M100,
The correspondence between the source IP address: I100 and the source MAC address 25-1 (MAC address: M100) is stored in the ARP cache table 15-2 (step R3).

Then, the IP packet analysis unit 12 transmits the data transmitted in the received IPv6 packet to the data reception notifying unit 11-2.

The data reception notifying section 11 notifies the data received from the IP packet analyzing section 12 to a higher-level device (not shown).

Further, the IP packet analysis unit 12 informs the transmitting device 9- of returning the acknowledgment (ACK) to the communication device 1-1 of the transmitting source with respect to the received IPv6 packet.
Instruct 2

The IP packet editing / generating section 7-2 of the transmitting device 9-2 edits and generates an IPv6 packet for ACK. That is, the IP packet edit generation unit 7-2 outputs
The MAC address identifier 24 is set in the IPv6 extension header 22 of the Pv6 packet format 20, and the MA of the own communication device 1-2 is set in the payload 23.
C address: M200 is the source MAC address 25-1
And the communication device 1 to which the ACK is returned
1 MAC address: M100 is set as the destination MAC address 25-2, and an IPv6 packet for ACK is edited and generated.

Next, the IP packet edit generation unit 7-2
The edited and generated IPv6 packet for ACK is transmitted to the IP packet transmission control unit 8-2.

The IP packet transmission control unit 8-2 is configured to transmit the I / O for the ACK received from the IP packet edit generation unit 7-2.
The Pv6 packet is transmitted to the network 50 (step R4).

The IP packet reception control unit 13-1 of the communication device 1-1 sends an IP
When a v6 packet is received (step S9), this IP
The v6 packet is transmitted to the IP packet analysis unit 12-1.

When the IP packet analyzing unit 12-1 checks the IPv6 extension header 22 of the received IPv6 packet for the ACK and recognizes the presence of the MAC address identifier 24 (step S 10), the IP packet analyzing unit 12-1 reads the source MA from the payload 23.
C address 25-1, here MAC address: M20
0, and the correspondence between the source IP address: I200 and the MAC address: M200 is stored in the ARP cache table 15-1 (step S1).
1).

[0049]

As described above, according to the present invention, the ARP (address resolution protocol) and the ARP cache table indicating the correspondence between the IP address and the MAC address are used in a complementary manner so that the MAC address can be converted from the IP address to the MAC address.
Since the address is obtained, the number of times of address resolution using ARP can be reduced, and traffic on the IP network can be reduced.

Further, the present invention has a MAC address in the payload of an IPv6 packet, and this MAC address is set to an AR each time an IPv6 packet is received.
Since it is stored in the P cache table, the IP
When transmitting a v6 packet, the correspondence between the IP address and the MAC address can be obtained using the ARP cache table, and the dependency on the ARP is reduced.
The traffic of the IP network can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of an IPv6 packet format.

FIG. 3 is a configuration diagram of an ARP cache table.

FIG. 4 is an operation case diagram.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 communication device 6 transmission request receiving unit 7 IP packet editing / generating unit 8 IP packet transmission control unit 9 transmitting device 10 receiving device 11 data reception notifying unit 12 IP packet analyzing unit 13 packet receiving control unit 14 ARP cache table storage device 15 ARP cache Table 16 IP address 17, 25 MAC address 20 IPv6 packet format 21 IPv6 header 22 IPv6 extension header 23 Payload 24 MAC address identifier 25-1 Source MAC address 25-2 Destination MAC address 50 Network

Claims (6)

[Claims] 1. An IP (Internet Protocol)
ol) address and MAC (Media Access)
Control: medium access control) cache table storage means for storing a cache table representing correspondence with an address;
First address obtaining means for obtaining a MAC address from an IP address, and IRP using an ARP (address resolution protocol).
Second address obtaining means for obtaining a MAC address from a P address, wherein the first address obtaining means is used preferentially to obtain a MAC address from an IP address,
When the MAC address cannot be obtained from the IP address by the address obtaining means, a physical address obtaining means for obtaining the MAC address from the IP address by the second address obtaining means; and the MAC address obtained by the second address obtaining means is the cache. First physical address registration means for registering in the cache table of the table storage means; a MAC address identifier which is a code for recognizing a MAC address in an extension header of the packet format, and a payload of the packet format,
IPv6 (Internet Protocol) having the MAC address obtained by the physical address acquisition means
ol Version 6) packet editing and generating means for editing and generating a packet; packet transmitting means for transmitting the IPv6 packet edited and generated by the packet editing and generating means to a network; packet receiving means for receiving the IPv6 packet from the network. An IPv6 network system, comprising: 2. The packet editing and generating means edits and generates the IPv6 packet so that the payload of the packet format has a destination MAC address of the IPv6 packet and a source MAC address of the IPv6 packet. I according to claim 1, characterized in that:
Pv6 network system. 3. The IPv6 packet analyzing means for analyzing an extension header of the IPv6 packet received from the network, recognizing a MAC address identifier, and extracting a MAC address from the payload of the IPv6 packet. 2. The IPv6 network system according to claim 1, further comprising: a second physical address registration unit that registers the MAC address extracted from the payload in the cache table of the cache table storage unit. 4. The packet receiving means instructs the packet editing and generating means to edit and generate an acknowledgment notification IPv6 packet for notifying a acknowledgment of the IPv6 packet received from the network. 4. A receipt instructing means for instructing the packet transmitting means to transmit the edited and generated receipt confirmation notice IPv6 packet to the network. IPv6 network system. 5. The packet receiving means receives an acknowledgment notice IPv6 packet transmitted via the network, extracts a MAC address from the received acknowledgment notice IPv6 packet by the IPv6 packet analyzing means, and A third step of storing a MAC address in a cache table of the cache table storage means;
5. The IPv6 network system according to claim 1, further comprising a physical address registration unit. 6. A plurality of communication devices communicate with each other using IPv6 (In
ternet Protocol Version6)
In the IPv6 network system that communicates via a network, the communication device includes a transmitting device, a receiving device, and an IP (Internet Protocol).
Address and MAC (Media Access Con)
troll: medium access control) having a cache table storage unit for storing a cache table representing a correspondence with an address, wherein the transmitting apparatus searches the cache table to obtain a MAC address from an IP address.
Address acquisition means and ARP (address resolution protocol)
Second to get the MAC address from the IP address using
Address obtaining means for obtaining a MAC address from an IP address by preferentially using the first address obtaining means.
When the C address cannot be obtained, the physical address obtaining means for obtaining the MAC address from the IP address by the second address obtaining means and the MAC address obtained by the second address obtaining means are stored in the cache table of the cache table storage unit. A first physical address registering means for registering, and a code MA for recognizing a MAC address in an extension header of a packet format.
IPv6 (Internet) having a C address identifier and a MAC address obtained by the physical address obtaining means in a payload of a packet format.
(Protocol Version 6) packet editing / generating means for editing / generating a packet, and packet transmitting means for transmitting the IPv6 packet edited / generated by the packet editing / generating means to a network, wherein the receiving device transmits the IPv6 packet from the network. Packet receiving means for receiving a packet; analyzing an extension header of the IPv6 packet received from the network to recognize a MAC address identifier;
IPv6 packet analysis means for extracting a MAC address from within the payload of six packets, second physical address registration means for registering the MAC address extracted from within the payload in the cache table of the cache table storage unit, I for notifying receipt confirmation to the received IPv6 packet
Reception confirmation packet generation instructing means for instructing the packet editing and generating means to edit and generate a Pv6 packet;
An IPv6 network system, comprising: an acknowledgment packet transmission instructing unit that instructs the packet transmitting unit to transmit the IPv6 packet for the acknowledgment notification to the network.