JPH06164582A - Virtual router controlling system - Google Patents

Abstract

PURPOSE:To execute the transmission and the reception of data between a network management system and a switchboard by setting another line as an alternative route at the time of the fault in one line. CONSTITUTION:The XR 12 of an SWE 1 informs an OMX 11 of the data for an IPX from the lines 3,4. An NR 23 transmits the data to the SWE 1 by using the normal line from the higher rank of a routing table. When an IPM 25 in a WS 21 receives the data of the SWE 1 for the IPX, it transmits this data to the NR 23 connected by an IPR. The NR 23 transmits the data to the transmitting destination IP address of the received data through an E 22 even though it receives the data from any line of the E 22. The NR 23 and the XR 12 transmit mutually a health check signal periodically to each line 3,4 in order to detect the abnormality of the lines 3,4, and the XR 12 and the NR 23 return their answer signals. The NR 23 and the XR 12 confirm these answer signals, and change the corresponding IP state of the routing table TN or TX.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a TCP / IP protocol (transmi
session control protocol / in
The present invention relates to a virtual router control method in a switching system connected to a switching system by means of a network protocol.

[0002]

2. Description of the Related Art Conventionally, when controlling a switching system from a network management system in a switching system of this type, a single TCP / IP address is assigned to one switching system to connect to the network management system.

[0003]

The conventional exchange system has a problem that the exchange cannot be controlled when the line between the network management system and the exchange fails.

An object of the present invention is that the exchange can receive a signal destined for the exchange-equipped IP address via the router of the network management system from any line corresponding to the IP address for the router. It is to provide a router control method that enables transmission from a system by a bypass route.

[0005]

The virtual router control system of the present invention is a switching system comprising a router of a network management system and a switching system connected to a plurality of lines by a TCP / IP protocol. Which IP address for a switch is assigned to each line and the IP address for the router is assigned to each line, and the exchange sends a signal for the IP address for the exchange via the router to the IP address for the router. It is also characterized in that reception is possible from the line.

The exchange has a virtual router for detecting a faulty line between the router and the IP address for the router by a router protocol, and when transmitting a signal from the exchange to the network management system, the faulty line is transmitted. It is characterized in that the line other than the above is used.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. 1 to 5 are diagrams for explaining the operation in the virtual router control method of the present invention, in which (a) is a block diagram of the switching system, and (b) is the routing table TN, TX in each figure (a). It is a figure which shows the example of content.

As shown in each of FIGS. 1 to 5 (a), the switching system of this embodiment has a switching system (hereinafter referred to as SWE) 1 and a network management system (hereinafter referred to as NM) connected by lines 3 and 4.
S) 2.

SWE1 is a router line IP address IPX
1, a virtual router (hereinafter XR) 12 to which IPX2 is assigned
And a maintenance operation unit (hereinafter referred to as OMX) 11 provided with an OMX IP address IPX.

The NMS 2 is a maintenance operation unit [hereinafter, OMN]
A workstation (hereinafter WS) 21 having an IP protocol controller 24 (hereinafter IPM) 25 and a router (hereinafter NR) 23 are provided, and the NR 23 is a router circuit IP address corresponding to the router circuit IP addresses IPX1 and IPX2 of XR12. IPR1 and IPR2 are assigned. The WS 21 and NR 23 are connected by the WSIP address IPN and NMS router IP address IPR of the Ethernet (hereinafter, E) 22, respectively.

Further, the NRs 23 and XR12 have routing tables TN and TX, respectively, and the routing tables TN and TX have the router line IP addresses corresponding to the lines 3 and 4 as shown in FIG. Normality and order of preference are shown.

In SWE1 shown in each figure (a), SW
Even if the XR12 of E1 receives the data from any of the lines 3 and 4, the data for the OMX IP address IPX is OM.
Notify X11. NR23 is OMX IP address IP
When the data for X is received from E22, it is transmitted from the upper part of the routing table to SWE1 using a normal line.

The IPM 25 in WS21 is the OM of SWE1
When the data for XIP address IPX is received, NM
NR2 connected by S router IP address IPR
Send this data to 3. NR23 sends the data to E22
Even if it is received from any line, it is transmitted to the destination IP address of the received data via E22.

NR23 and XR12 are connected to each other through line 3,
The health check signal is periodically transmitted to each of the lines 3 and 4 in order to detect the abnormality of No. 4, and the XR12 and NR23 on the receiving side are transmitted.
When it receives a health check signal, it sends back a response signal. Then, the NRs 23 and XR12 on the transmission side confirm this response signal and change the corresponding IP state of the routing table TN or TX.

Next, the operation of this embodiment will be described.

FIG. 1A shows a case where the XR 12 sends health check signals a and c to the NR 23 via lines 3 and 4, and the NR 23 sends back response signals b and d. In this case, since the response signals b and d are returned normally to both lines 3 and 4, the state on the routing table TX is normal to both router line IP addresses IPR1 and IPR2 as shown in FIG. 1B. ○ ”

In FIG. 2A, the NR 23 sends the health check signals e and g to the XR 12 via the lines 3 and 4, respectively.
And the XR 12 returns the response signals f and h. Also in this case, the response signals f and h are transmitted to both lines 3, 4
Since both are normally returned, the state on the routing table TN is normal "O" as shown in FIG. 2B for both router line IP addresses IPX1 and IPX2.

FIG. 3 shows the OMN of WS21 in the state shown in FIG.
24 shows a case where the data i for the OMX IP address IPX is transmitted from 24 to SWE1. The OMN 24 sends the data i to the IPM 25, and the IPM 25 sends N via E22.
The data i is transmitted to R23. NR that received data i
23 uses the line 3 corresponding to the OMX IP address IPX to switch the data i according to the routing table TN.
Send to E1. Since the destination IP address of the XR 12 that has received the data i is the OMX IP address IPX, OMX
The received data i is passed to 11.

Next, the operation when the line 3 becomes faulty (indicated by X) will be described.

FIG. 4 shows NMS2 to SWE1, and FIG. 5 shows S.
The case of sending data from WE1 to NMS2 is shown. In both FIGS. 4 and 5, since the response signal to the health check signal shown in FIGS. 1 and 2 is not returned, the router line IP addresses IPX1 and IPR1 on the routing tables TN and TX corresponding to the line 3 are shown. Four
As shown in (b) and FIG. 5 (b), the failure status is "x".

First, in FIG. 4, since the data i that has reached the NR23 is in failure at the router line IP address IPX1 of the routing table TN, the data i is sent to SWE1 using the line 4 corresponding to the router line IP address IPX2. Send. That is, the line 4 serves as a detour route. XR
12 is OMX even when the data i is received from the line 4 because the destination IP address is OMX IP address IPX
The data i is passed to 11.

Next, referring to FIG. 5, the OMX 11 operates as WS2.
When sending the data j to the OMN 24 of No. 1, when the XR 12 receives the data j from the OMX 11, it sends the data j to the NMS 2 using the line 4 corresponding to the router line IP address IPR 2 according to the routing table TX.
Upon receiving the data j, the NR 23 transmits the data j to the destination WSIP address IPN via E22. IPM2
5 passes the received data j to the OMN 24.

As described above, in this embodiment, the virtual router XR12 is provided in the SWE1 and is directly connected to the router NR23 on the NMS2 side by the two lines 3 and 4, so that when one line fails, the other line is used as a bypass route. Data can be sent and received.

[0024]

As described above, according to the present invention, a virtual router is provided in the exchange and is directly connected to the router in the network management system by a plurality of lines, so that when one line fails, another line bypasses the other line. The effect that the data can be transmitted and received between the network management system and the exchange by setting the setting to.

Further, since the detour route is set at the router level, there is an effect that the upper application does not need to be aware of the line state.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an operation in a virtual router control system of the present invention, (a) is a block diagram of a switching system, and (b) is a routing table T in FIG. 1 (a).
It is a figure which shows the content example of N, TX.

2A and 2B are diagrams for explaining the operation in the virtual router control method of the present invention, in which FIG. 2A is a block diagram of a switching system, and FIG. 2B is a routing table T in FIG.
It is a figure which shows the content example of N, TX.

3A and 3B are diagrams for explaining the operation of the virtual router control method of the present invention, in which FIG. 3A is a block diagram of a switching system, and FIG. 3B is a routing table T in FIG.
It is a figure which shows the content example of N, TX.

4A and 4B are diagrams for explaining the operation in the virtual router control method of the present invention, in which FIG. 4A is a block diagram of a switching system, and FIG. 4B is a routing table T in FIG. 4A.
It is a figure which shows the content example of N, TX.

5A and 5B are diagrams for explaining the operation in the virtual router control method of the present invention, in which FIG. 5A is a block diagram of a switching system, and FIG. 5B is a routing table T in FIG. 5A.
It is a figure which shows the content example of N, TX.

[Explanation of symbols]

1 Switch (SWE) 2 Network Management System (NMS) 3, 4 Lines 11, 24 Maintenance and Operation Department (OMX, OMN) 12 Virtual Router (XR) 21 Workstation (WS) 22 Ethernet (E) 23 Router (NR) 25 IP protocol control unit (IPM) IPN WSIP address IPR NMS router IP address IPR1, IPR2, IPX1, IPX2 router line IP address IPX OMX IP address TN, TX Routing table a, c, e, g Health check signal b, d, f, h Response signal i Data from NMS to SWE j Data from SWE to NMS

Claims (2)

[Claims] 1. A switching system comprising a router included in a network management system and a switch connected to a plurality of lines by a TCP / IP protocol, wherein the switch is provided with an IP address corresponding to the switch and a line corresponding to the switch. An IP address for the router is assigned to each of the
A virtual router control method, wherein a signal destined for an address can be received from any of the lines corresponding to the router IP address. 2. The exchange comprises a virtual router for detecting a faulty line between the router and the router IP address by a router protocol, and the faulty line is transmitted when the switch sends a signal to the network management system. The virtual router control method according to claim 1, wherein the lines other than the above lines are used.