JPH11163855A - Network monitor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the system to acquire number of packets transferred between desired sets of terminals even in the case of transferring packets through the use of a physical layer switch. SOLUTION: Upon the receipt of a packet, a switch means 6 retrieves an address table 7 by using a destination address of the received packet as a key and transfers the received packet to an output port acquired from an entry whose destination address is coincident. In this case, the switch means 6 registers sets of a packet destination address and a sender source address of the packet as an entry to a connection table 8. When an entry has been already in existence, the number of transferred packets in the entry is incremented by the number of transferred packets. A connection table retrieval means 4 extracts contents of the entry from the connection table 8 and gives them to a display means 5. The display means 5 displays the contents of the entry of the connection table 8 to be received.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a network monitoring system for transferring packets between communication terminals using a physical layer switch.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a conventional network monitoring system. The communication terminal 11 and the communication terminal 12 are connected to the same shared transmission line 13,
All packet transfer between communication terminals is performed by the shared transmission line 13.
Done on

In FIG. 2, a packet collecting means 14
It is possible to collect all the packets transferred on the shared transmission path 13. Based on the collected packets, a set of the destination address of the packet and the source address of the packet is used as an entry, and a connection table 15 is created which records the number of collected packets of the same destination and source in the entry. The display means 16 displays the contents of the connection table.

[0004] Japanese Patent Application Laid-Open No. 5-68038 discloses an example of a conventional packet collection method.

[0005]

However, in the case of a network in which packets are transferred between communication terminals using a physical layer switch, the transfer using the physical layer switch requires
Since this is performed only for one port determined by the destination address, there is a problem that all packets passing through the physical layer switch cannot be collected from one port.

An object of the present invention is to provide a network monitoring system capable of acquiring the number of packets transferred between a desired set of terminals even when performing packet transfer using a physical layer switch. is there.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a network monitoring system for transferring packets between communication terminals using a physical layer switch, wherein a destination address and an output port of a packet having the destination address are paired. Switch means for searching the address table with the address table having the specified entry, the destination address of the input packet, and outputting the input packet to the output port obtained from the entry having the matching destination address, and switch means A physical layer switch having, as an entry, a set of a destination address and a source address of a packet transferred according to a connection table having, in the entry, the number of transferred packets of the same destination and source; Connection table search means for acquiring the contents of the connection table of the layer switch When, characterized in that it comprises a monitoring device having a display means for displaying the entry information acquired by the connection table lookup means.

According to the present invention, a connection table is provided in a physical layer switch, and a set of a destination address and a source address of a packet transferred by the switch means is held as an entry, and this is stored in a connection table search means provided in the monitoring apparatus. Thus, the number of packets transferred between a desired set of terminals can be obtained.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a network monitoring system according to the present invention. The network monitoring system shown in FIG.
And a monitoring device 1 having a display means 5, a physical layer switch 2 having a switch means 6, an address table 7 and a connection table 8, and a communication terminal 3.

In the monitoring device 1, the display means 5 is connected to the connection table search means 4, and in the physical layer switch 2, the address table 7 and the connection table 8 are connected to the switch means 6. Further, physical layer switch 2
The connection table search means 4 of the monitoring apparatus 1 and the communication terminal 3 are connected to the switch means 6.

The address table 7 has an entry in which a destination address and an output port are paired.
Is referred to when the input packet is transferred.

A set of a destination address and a source address of a packet transferred by the switch means 6 is stored in the connection table 8 as an entry. The number of transferred packets of the same destination and source is recorded in this entry.

An entry of the connection table 8 is taken out by the connection table search means 4 and the number of each set of the transmission destination and the transmission source is displayed on the display means 5.

Next, the operation of the embodiment of the present invention will be described with reference to FIG.

When a packet is input to the switch unit 6, the switch unit 6 searches the address table 7 by the destination address of the input packet, and inputs the packet to the output port obtained from the entry whose destination address matches. Forwarded packet.

At this time, the switch means 6 registers a set of the destination address and the source address of the packet in the connection table 6 as an entry. If an entry already exists, the number of transferred packets in the entry is increased by the number of transferred packets.

The connection table search means 4 extracts the contents of the entry from the connection table 8 and sends it to the display means 5.

The display means 5 displays the sent connection table 8
Display the contents of the entry for.

[0020]

As described above, according to the present invention, the physical layer switch has a connection table having an entry in which a destination address and a source address are paired. In this case, the number of packets transferred between communication terminals having a desired address can be known.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a network monitoring system according to the present invention.

FIG. 2 is a block diagram illustrating an example of a conventional network monitoring method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Monitoring apparatus 2 Physical layer switch 3,11,12 Communication terminal 4 Connection table search means 5,16 Display means 6 Switch means 7 Address table 8,15 Connection table 13 Shared transmission path 14 Packet collection means

Claims (6)

[Claims] 1. A network monitoring system for transferring a packet between communication terminals using a physical layer switch, comprising a set of a destination address and a source address of the transferred packet as entries, the same destination and the same A physical layer switch having a connection table for recording the number of transferred original packets in the entry; a connection table search unit for obtaining the contents of the connection table of the physical layer switch; and entry information obtained by the connection table search unit. A network monitoring system, comprising: a monitoring device having display means for displaying. 2. A network monitoring system for transferring packets between communication terminals using a physical layer switch, comprising: an address table having an entry in which a destination address and an output port of a packet having the destination address are paired; Switch means for searching the address table according to the destination address of the input packet and outputting the input packet to the output port obtained from the entry having the matching destination address, and the destination address of the packet transferred by the switch means A physical layer switch having a set of addresses of a source and a source as an entry, and having a connection table for recording the number of transferred packets of the same destination and the source in the entry, and the contents of the connection table of the physical layer switch. Connection table search means to be acquired and connection table search means Network monitoring system comprising: the monitoring device, a and a display means for displaying the acquired entry information I. 3. The network monitoring system according to claim 1, wherein when an entry already exists in the connection table, the number of transferred packets in the entry is increased by the number of transferred packets. 4. A network monitoring method for transferring a packet between communication terminals using a physical layer switch, wherein a set of a destination address and a source address of the transferred packet is used as an entry in a connection table in the physical layer switch. A network monitoring method, wherein the network monitoring method holds the contents of an entry from a connection table and obtains the number of packets transferred between a desired set of communication terminals. 5. A network monitoring method for transferring a packet between communication terminals using a physical layer switch, comprising the steps of: storing an address table having an entry in which a destination address and an output port are paired; And forwards the input packet to the output port obtained from the entry with the matching destination address, registers the pair of the destination address and the source address of the packet as an entry in the connection table, and A network monitoring method, wherein contents are taken out and displayed by a display means. 6. The network monitoring method according to claim 4, wherein when an entry already exists in the connection table, the number of transferred packets in the entry is increased by the number of transferred packets.