JP2014171086A - Communication device in network and network configuration changing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication device and a network configuration changing method that only change configurations of directly-related communication devices and can achieve reduction in a communication interruption time in the change of a network configuration.SOLUTION: In the case where a logical link (L101) is set between communication devices (202, 203) that have implemented at least a logical link setting protocol in a communication network, if one communication device (202) deletes the logical link (L101) by setting information (S10), the communication device (202) transmits a setting deletion notice of the logical link to the other communication device (203) (S11), and both communication devices (202, 203) delete the logical link (S12).

Description

  The present invention relates to a network composed of a plurality of communication devices linked together, and more particularly to a protocol control technique for a communication device in a network operating according to a plurality of protocols.

  Various communication protocols are used in communication apparatuses in a network according to the purpose / application. A typical example is a link aggregation protocol (LACP: Link Aggregation Control Protocol (IEEE802.3ad or IEEE802.1AX)) that bundles multiple physical links to improve the data transfer rate, and builds a loop-free network. Spanning tree protocol (xSTP), ring protection protocol, etc. are known. In actual operation, only one protocol is rarely used in one network, and a desired network is constructed by combining a plurality of protocols.

  For example, in Patent Document 1, in autonomous distributed control networks such as MPLS (Multi-Protocol Label Switching), GMPLS (Generalized MPLS), and ASON (Automatic Switch Optical Network), AMR (Adaptive Modulation Radio) and LAG (Link Aggregation) are disclosed. Group) etc. are used as logical links.

JP 2012-054730 A

  However, each of a plurality of protocols is usually established independently, and when a plurality of protocols are combined, it is difficult to cause the network to perform a desired behavior unless the protocol operation being used is well understood. . Therefore, for example, when some protocol settings are deleted or added, the time required for changing the communication path may be longer than expected. For example, in an existing network that uses a combination of the spanning tree protocol and the link aggregation protocol, when an extension or maintenance is performed with a short mean repair time (MTTR), the network administrator does not directly relate to the maintenance / addition. It was necessary to change settings to the equipment and add temporary equipment. A specific example of the network configuration change time will be briefly described below with reference to FIGS.

  As shown in FIG. 1, it is assumed that a plurality of communication devices 100 to 103 constitute a loop network, and the communication devices 100 and 101 are connected to an external network. It is assumed that a spanning tree protocol (xSTP protocol) is applied to each communication device, and a link aggregation protocol (LAG protocol) is further applied to the communication devices 102 and 103. Ports whose communication is stopped by the protocol operation are represented by black circles, and as a result, effective communication paths are represented by bold lines. Note that p1 to p3 in each communication device indicate ports and numbers of the respective communication devices, and these operate as physical links. However, port numbers that are not necessary for the description are omitted. Further, it is assumed that two physical links (p1, p2) between the communication apparatuses 102 and 103 are aggregated as one logical link L101 by the LAG protocol.

  Here, consider a case in which the connection between the communication device 102 and the communication device 103 is disconnected for network renovation or the like. In order to shorten the communication interruption time seen from the external network, it is possible to change the path cost (xSTP parameter) of the port p1 of the communication apparatus 101 and delete the setting of the logical link L101. It is necessary to change the settings for communication devices that do not exist. Further, as described below, when deleting the setting of the logical link L101, the communication interruption time differs depending on which of the communication devices 102 and 103 is deleted, so the order of deletion must also be considered.

<When deleting the logical link setting of the communication device 103 first>
As shown in FIG. 2, when the L101 setting of the communication apparatus 103 is deleted, the logical link L101 of the communication apparatus 103 returns to the physical links p1 and p2. Since the L101 port of the communication apparatus 102 is originally a port toward the communication apparatus 100 (Root Bridge), it does not transmit an xSTP protocol frame. Accordingly, the physical ports p1 and p2 of the communication device 103 are edge ports, that is, ports in which no device that handles the xSTP protocol exists before the communication device 103.

  When the L101 setting of the communication apparatus 103 is deleted, the communication apparatus 103 notifies the communication apparatus 100 of an xSTP topology change notification (TC), and the communication apparatus 100 attempts to transmit a TC notification to the communication apparatus 101. In the communication apparatus 101, since the xSTP information handled with the communication apparatus 100 is not changed, the state (communication is stopped) of the physical port p1 of the communication apparatus 101 is not changed.

  Since the communication apparatus 102 is the opposite apparatus (communication apparatus 103) of L101 and the setting of L101 has been deleted, the logical link is originally linked down, but the protocol frame (LACP) used for LAG is a protocol frame from the opposite apparatus. Is determined to be link-up until 3 seconds continues (= 1 second × 3 times). For this reason, there is no route for two to three seconds until L101 is determined to be link-down by the LAG protocol operation in the communication device 102 even though there is no route connecting the communication devices 100-103-102-101. As a result, a communication interruption occurs.

<When deleting the logical link setting of the communication apparatus 102 first>
As shown in FIG. 3, when the logical link setting of the communication device 102 is deleted, the logical link L101 of the communication device 102 returns to the physical links p1 and p2. The L101 port of the communication device 103 is a downstream port (Designated Port) when viewed from the communication device 100 that is a root bridge, and transmits xSTP protocol frames at regular intervals (default 2 seconds). Further, since the L101 setting is deleted on the communication apparatus 102 side, the link is originally down, but as described above, the link up state is maintained for a maximum of 3 seconds. However, since there is no change in the relationship between the communication device 100 and the communication device 103, the communication between the communication device 100 and the communication device 103 is continued.

  However, since the logical link L101 is actually lost in the communication apparatus 102 (corresponding to link down), the topology change notification TC is notified from the physical port p3 of the communication apparatus 102 to the communication apparatus 101 at the same time as being deleted. (The xSTP parameters have also changed from the situation in Fig. 1). At this time, since the communication device 101 determines that the port p1 direction is better than the port p2 direction, the communication device 101 immediately cancels the communication stop of the alternate port p1 and communicates with the communication device 100. To start.

  It takes 2-3 seconds until L101 of the communication device 103 is determined to be link-down as described above. However, since a route to each communication device is established regardless of this, the route connecting the communication devices Loss is minimized. Therefore, in order to shorten the communication interruption time, it is advantageous to delete from the LAG setting on the communication device 102 side.

  As described with reference to FIGS. 2 and 3, when the setting of the logical link L101 is deleted, the communication interruption time differs depending on which of the communication devices 102 and 103 is deleted, so the order of deletion must also be considered. Such a determination requires technical ability and experience to understand each protocol operation deeply, and is generally required not only in the network configuration described above but also in a network that operates according to a plurality of protocols including a link aggregation protocol. . This judgment becomes more difficult especially when the network configuration is large.

  Accordingly, an object of the present invention is to provide a communication device and a network configuration change method capable of achieving a reduction in communication disconnection time by changing the configuration only for directly related communication devices when changing the network configuration.

A communication apparatus according to the present invention is a communication apparatus that implements at least a logical link setting protocol in a communication network, and deletes a logical link between setting input means for inputting setting information and another communication apparatus based on the setting information. And a protocol control means for transmitting a notification of setting deletion of the logical link to the other communication device.
The communication device according to the present invention is a communication device that implements at least a logical link setting protocol in a communication network, and when a logical link is set with another communication device, the logical link is transmitted from the other communication device. It is characterized by having a protocol control means for deleting the logical link when receiving the setting deletion notification.
A network configuration change method according to the present invention is a network configuration change method using a communication device that implements at least a path switching protocol as a node, and is between a first communication device and a second communication device that implement a logical link setting protocol. When a logical link is set and the first communication device inputs setting information for deleting the logical link, a setting deletion notification of the logical link is transmitted to the second communication device, and the first communication device And the second communication apparatus deletes the setting of the logical link.

  According to the present invention, when deleting a logical link with another communication device, a notification of setting deletion of the logical link is transmitted to the other communication device, so that the communication device directly related in the change of the network configuration can be transmitted. It is possible to achieve a reduction in communication disconnection time while changing the configuration only for that.

FIG. 1 is a network diagram showing a loop network for explaining the problems of the background art. FIG. 2 is a network diagram showing a modification of the network configuration shown in FIG. FIG. 3 is a network diagram showing another modification of the network configuration shown in FIG. FIG. 4 is a partial network diagram for explaining an example of a network configuration changing method according to an embodiment of the present invention. FIG. 5 is a block diagram showing a configuration of a communication apparatus according to an embodiment of the present invention. FIG. 6 is a schematic network diagram for explaining the logical link deletion operation of the communication apparatus according to this embodiment. FIG. 7 is a schematic network diagram for explaining the path switching operation of the communication apparatus according to the present embodiment.

  According to the embodiment of the present invention, when a configuration change (particularly, setting deletion) of a logical link connected to another communication device is performed, notification of setting deletion is also sent to the other communication device. As a result, the logical link setting is deleted in the two communication devices facing each other across the logical link to be deleted.

  As a result, the restriction on the order of deleting the logical link is relaxed, and the network can be changed in a short communication interruption time without changing the setting other than the device whose configuration is to be changed. That is, the path reconstruction can be operated without waiting for the timeout of the protocol link maintenance operation. Furthermore, it is not necessary to consider the deletion order of logical links, and the number of devices whose settings should be changed in maintenance work can be reduced, so that maintenance work becomes easy. Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the drawings.

1. One Embodiment As shown in FIG. 4, a communication device 202 and a communication device 203 which are nodes of a network implement a logical link setting protocol and a path switching protocol, and set a logical link L101 using the logical link setting protocol. To do. In this state, when setting deletion of the logical link L101 is input by a user instruction (operation S10), the communication device 202 transmits a logical link deletion notification to the opposing communication device 203 (operation S11). As a result, the logical link setting is deleted in the communication devices 202 and 203 on both sides of the logical link L101, and the logical link L101 returns to the physical link (p1, p2) (operation S12). Since the logical link L101 is deleted in both the communication devices 202 and 203, the logical link is artificially disconnected, the change in the network connection relation is immediately reflected, and the path change is executed by the operation of the path switching protocol. Is done.

  As described above, according to this embodiment, since the logical link setting is deleted in the communication devices 202 and 203 on both sides of the logical link L101, it is not necessary to consider the order of deleting the logical link L101. Since it is not necessary to change the settings of devices other than the devices 202 and 203 whose configuration is to be changed, the communication disconnection time is shortened, and the network change operation is facilitated.

2. 2. Example 2.1) Configuration of Communication Device FIG. 5 shows the configuration of each communication device that is a network node. As described above, the physical link and the physical port are semantically linked in a one-to-one relationship. Yes. Here, a functional configuration related only to normal protocol operation is shown, and other necessary functions are omitted.

  The communication apparatus according to the present embodiment includes a frame reception unit 401, a protocol analysis unit 402, a frame creation unit 403, a transmission port control unit 404, a transmission queue 405, a frame transmission unit 406, a bandwidth notification unit 407, a queue usage amount notification unit 408, It has a functional configuration including a setting input unit 409, a protocol setting reflecting unit 410, and a setting information storage area 411. Hereinafter, each functional block will be described.

  The frame reception unit 401 receives data from the outside of its own device and holds it in the reception queue. This function is provided for each physical port. In addition, full-duplex communication is assumed here, but half-duplex communication is also possible. However, in that case, a queue usage amount notification unit and a bandwidth notification unit, which will be described later, are also required on the reception side.

The protocol analysis unit 402 has the following protocol control function. Here, representative functions of a plurality of protocols are collectively described.
Of the data received by the frame receiver, the data related to each protocol (including setting deletion notification) or the setting change of each protocol from the protocol setting reflection unit 410 is analyzed according to the decision logic of each protocol, and the analysis Based on the result, the transmission port control unit 404 is instructed to change the state of the transmission port, and the frame creation unit 403 is instructed to create a control frame. At this time, related setting information is acquired from the setting information storage area 411 as necessary. In addition, the analysis function of the protocol analysis unit 402 includes determination that is not accompanied by reception of a frame, for example, operation determination by a timer.
・ In the normal protocol, the destination port of the frame is also specified.
In response to the logical link deletion setting notification from the protocol setting reflection unit 410, the frame generation unit 403 is instructed to generate a setting deletion notification frame as necessary.
Reading from the setting information storage area 411 a method for selecting a physical port to which a setting deletion notification is transmitted, and instructing the frame creation unit 403.

The frame creation unit 403 has the following functions.
Create a control frame necessary for a normal protocol and pass the frame to the transmission port control unit 404. At this time, if the destination port is designated from the protocol analysis unit 402, the information is also passed to the transmission port control unit 404.
Create a setting deletion notification frame and pass the frame to the transmission port control unit 404.

The transmission port control unit 404 has the following functions.
Control of frame transmission / reception permission / stop on the physical link (physical port) based on the determination of the protocol analysis unit 402 (normal protocol operation).
Selection of a physical port (here, a transmission queue) that transmits a deletion notification based on information from the bandwidth notification unit 407 or the queue usage notification unit 408.
-Basic physical port control such as link up / link down.

The transmission queue 405 has the following functions. This functional unit exists for each physical port together with the frame transmission unit 406.
Receives a transmission frame from the transmission port control unit 404 and passes the information in the queue to the frame transmission unit 406 when the frame transmission unit 406 becomes ready for frame transmission. The transmission queue 405 operates as a FIFO (First In First Out) memory.
Informs the queue usage notification unit 408 of the usage of the transmission queue 405.

The frame transmission unit 406 has the following functions. This functional unit exists for each physical port together with the transmission queue 405.
The frame stored in the transmission queue 405 is transmitted outside the own apparatus.
Informs the bandwidth notification unit 407 of the communication bandwidth usage of the port including user communication.

The band notification unit 407 has the following functions. Here, this functional unit collectively manages a plurality of frame transmission units 406 (transmission ports), but may exist for each physical port and notify the transmission port control unit 404 of them.
Informs the transmission port control unit 404 of the effective communication band possessed by each port.
The communication band usage of each port is acquired from the frame transmission unit 406 and transmitted to the transmission port control unit 404.

The queue usage notification unit 408 has the following functions. Here, a plurality of transmission queues 405 (transmission ports) are managed together, but may exist for each physical port and may be notified to the transmission port control unit 404.
Inform the transmission port control unit 404 of the length of the transmission queue 405 that each port has.
The transmission queue usage amount possessed by each port is acquired from the transmission queue 405 and transmitted to the transmission port control unit 404.

  The setting input unit 409 receives setting information from a user (= administrator) or a network management apparatus, and instructs the protocol setting reflection unit 410 to perform processing for setting each protocol.

The protocol setting reflection unit 410 has the following functions.
The setting information from the setting input unit 409 is written in the setting information recording area 411.
If the setting change from the setting input unit 409 is LAG logical link deletion, the protocol analysis unit 402 is notified that there has been a setting deletion request.

The setting information storage area 411 has the following functions.
-Save various states (port is protocol) necessary for protocol operation and read / write them.
Saving of specified settings from the user or network management device from the protocol setting reflection unit 410 and reading / writing them.
Reading / writing logical link information from the protocol analysis unit 402
Reading of a method for selecting a physical port that transmits a setting deletion notification from the protocol analysis unit 402.

  It should be noted that functions equivalent to the protocol analysis unit 402, frame creation unit 403, transmission port control unit 404, and protocol setting reflection unit 410 to be described below are programs stored in a memory (not shown) on a computer (CPU: Central Processing Unit). It can also be realized by executing.

2.2) Operation As described above, “when the logical link setting of the communication device 103 is deleted first” in FIG. 2 is performed until L101 is determined to be linked down by the LAG protocol operation in the communication device 102. There is a problem that the communication interruption time is 3 seconds, and this problem is solved by this embodiment. In the following description, for convenience of explanation, description is made by sequential processing, but parallel processing may be performed at a place where parallel processing is possible. For example, the selection of a physical port that sends a setting deletion notification from the protocol analysis unit 402 to the transmission port control unit 404 and the frame creation request to the frame creation unit 403 can be processed in parallel.

  In FIG. 6, it is assumed that the communication devices 100 and 101 and the communication devices 202 and 203 according to this embodiment form a loop network, and the communication devices 100 and 101 are connected to an external network. These communication apparatuses basically have the functional configuration shown in FIG.

  It is assumed that a spanning tree protocol (xSTP protocol) is applied to each communication device, and a link aggregation protocol (LAG protocol) is further applied to the communication devices 202 and 203. As already described, ports whose communication is stopped by the protocol operation are represented by black circles, and as a result, effective communication paths are represented by bold lines. Further, p1 to p3 in each communication device indicate the ports and their numbers possessed by the respective communication devices, and these operate as physical links. However, port numbers that are not necessary for the description are omitted.

  In addition, it is assumed that two physical links (p1, p2) between the communication apparatuses 202 and 203 are aggregated as one logical link L101 by the LAG protocol. As already described, since the L101 port of the communication device 202 is a port that is originally directed to the communication device 100 that is the root bridge, the xSTP protocol frame is not transmitted. Therefore, the physical ports p 1 and p 2 of the communication device 203 have not received the xSTP protocol frame from the communication device 202.

  Hereinafter, an operation when an instruction to delete a logical link setting is input to the communication apparatus 203 for network renewal or the like will be described with reference to FIGS.

  When a logical link setting deletion notification is input to the setting input unit 409 of the communication apparatus 203 (operation S10), the protocol reflection unit 410 sends a setting deletion notification to the protocol analysis unit 402, and the protocol analysis unit 402 receives this and the frame analysis unit 402 receives the setting deletion notification. In 403, a setting deletion notification is generated. At this time, the physical port information belonging to the relevant logical port L101 and the physical port selection method for transmitting the setting deletion notification from the setting information storage area 411 are acquired and passed to the frame creation unit 403. The protocol analysis unit 402 deletes the corresponding logical link setting in the setting information storage area 411 after the setting deletion notification is transmitted.

  The frame creation unit 403 creates a setting deletion notification frame including physical port information belonging to the logical port L101 and a method of selecting a physical port to which the setting deletion notification is transmitted, and passes it to the transmission port control unit 404. It should be noted that the setting deletion notification frame may extend the existing protocol or be separately defined as long as the corresponding logical link L101 and its deletion are transmitted.

  For each physical port belonging to the corresponding logical port, the transmission port control unit 404 obtains the transmission queue length and transmission queue usage from the queue usage notification unit 408, and the effective communication band and communication band usage from the band notification unit 407. To do.

The transmission port control unit 404 uses the transmission queue length and the transmission queue usage of each physical port, the effective communication bandwidth and the communication bandwidth usage, and the configuration deletion notification according to the selection method of the physical port that transmits the configuration deletion notification. Select the physical port to perform. One of the following methods or a combination thereof can be used as a method of selecting a physical port.
・ Minimum frame transmission queue usage (comparison of transmission queue usage)
・ The frame transmission queue is most empty (transmission queue length-transmission queue usage comparison)
・ Lowest communication bandwidth (comparison of communication bandwidth usage)
・ The largest available communication bandwidth (comparison of effective communication bandwidth and communication bandwidth usage)
The determination method may be designated by the user as setting information as necessary as described in the present embodiment, or may be switched dynamically by providing a separate algorithm. The transmission port control unit 404 passes the setting deletion notification frame to the transmission queue 405 of the selected physical port.

  When the frame transmission unit 406 is ready to transmit a frame, the frame transmission unit 406 extracts frame data (here, a setting deletion notification frame) from the transmission queue 405 belonging to the same physical port, and transmits the frame data (here, the communication device 202) (operation S11). ).

  When receiving the setting deletion notification frame, the frame reception unit 401 of the communication apparatus 202 passes the setting deletion notification frame data to the protocol analysis unit 402. The protocol analysis unit 402 deletes the corresponding logical link information of its own device from the setting information storage area 411 based on the logical link information in the setting deletion notification frame. Also, the transmission port control unit 404 is instructed so that the physical link belonging to the logical link becomes valid.

  Thus, the physical ports p1 and p2 of the communication devices 202 and 203 are changed from the logical port to the physical port almost simultaneously. That is, since the xSTP parameters have also changed from the situation, a topology change notification TC is transmitted from the physical port p3 of the communication apparatus 202 to the communication apparatus 101 (operation S13).

  Subsequently, as illustrated in FIG. 7, the communication apparatus 101 that has received the topology change notification TC from the port p2 determines that the p1 direction is better than the p2 direction, and thus the communication of the p1 that has been the alternative port. The stop is immediately released, and the communication apparatus 101 starts communication with the communication apparatus 100. At this time, TC transmission is also performed in the communication apparatus 100 and the communication apparatus 203, but the description is omitted because it does not directly affect the effect. In this way, xSTP protocol frames are exchanged between the communication apparatus 101 and the communication apparatus 202 and between the communication apparatus 202 and the communication apparatus 203, and a communication path as shown in FIG. 7 is established.

2.3) Effect As described above, according to the present embodiment, the configuration change is performed only on the communication devices 202 and 203 that are directly related to the logical link setting deletion. Even if the logical link setting is deleted, the communication path can be reconstructed without waiting for the timeout period of the protocol link maintenance confirmation operation. Thereby, the difference in communication disconnection time due to the difference in operation procedure as described in FIGS. 2 and 3 can be suppressed. By suppressing the difference in communication interruption time, it is possible to minimize the influence on user communication.

  In addition, only the setting deletion operation of one communication device can be executed to delete the setting of the opposite communication device, so that the overall maintenance procedure can be reduced.

3. Other Embodiments In the above-described embodiments, the case where the xSTP protocol used for loop avoidance and the LAG protocol for link aggregation are combined is shown, but the logical link having the physical link as a component and path switching Any combination of protocols with processing may be used. For example, a combination with a ring protection protocol (ERP) or a LAG protocol may be used.

  In the above embodiment, a frame format other than the existing protocol is used for the deletion notification. However, if notification / processing can be performed in units of logical links within the range permitted by the existing protocol, an extension area within that protocol is used. May be. For example, the Reserve area on the protocol frame can be used.

  Further, in the above embodiment, “deletion notification” is notified to the opposite device. However, if it is possible to notify or specify “link down” to the opposite device at the logical link level, notification or operation other than deletion is possible. May be associated. For example, when the frame transfer management table (FDB or the like) is cleared, it is possible to notify the opposite apparatus once of the link down.

Further, the following methods may be combined when notification of setting deletion to the opposite device.
-Of the physical links that make up the logical link, the frame transmission queue usage is the least, the frame transmission queue is the most empty, the least used communication band is the least, or the free communication band is the largest, or these The configuration deletion notification is performed from the physical link selected by the combination of. The setting deletion notification destination determination method may be set as desired, or may be dynamically changed by preparing a separate algorithm.
-A setting deletion notification is made on one of the physical links that make up the logical link. At this time, the opposite device that has received the notification performs a deletion process on the logical link to which the physical link belongs.

  By combining this method, it is possible to send a setting deletion notification to the opposite device at a higher speed, reducing the bandwidth on user communication for services provided other than control / management communication such as protocols, and increasing user communication. The notification frame arrival delay accompanying the load can be minimized.

4). Additional Notes Part or all of the above-described embodiments may be described as the following additional notes, but are not limited thereto.
(Appendix 1)
A communication device that implements at least a logical link setting protocol in a communication network,
A setting input means for inputting setting information and a protocol control means for transmitting a setting deletion notification of the logical link to the other communication apparatus when deleting a logical link between the communication apparatus and the other communication apparatus by the setting information;
A communication apparatus comprising:
(Appendix 2)
The communication apparatus according to appendix 1, wherein the protocol control unit deletes the logical link when receiving the setting deletion notification of the logical link from the other communication apparatus.
(Appendix 3)
3. The communication apparatus according to appendix 1 or 2, wherein when the protocol control unit executes setting deletion of the logical link, the protocol control unit executes path reconfiguration according to a path switching protocol regardless of a link maintenance operation.
(Appendix 4)
The protocol control means, when transmitting the logical link setting deletion notification, selects a physical link for transmission in accordance with a communication utilization status among physical links constituting the logical link. 4. The communication device according to any one of items 3.
(Appendix 5)
A communication device that implements at least a logical link setting protocol in a communication network,
In the case where a logical link is set with another communication device, it has a protocol control means for deleting the logical link when the logical link setting deletion notification is received from the other communication device. Communication device.
(Appendix 6)
6. The communication apparatus according to appendix 5, wherein when the protocol control unit deletes the setting of the logical link, the protocol control unit executes path reconstruction in accordance with a path switching protocol regardless of a link maintenance operation.
(Appendix 7)
A method for changing the configuration of a network having at least a communication device equipped with a path switching protocol as a node,
When a logical link is set between a first communication device and a second communication device that implement a logical link setting protocol, when the first communication device inputs setting information for deleting the logical link, the logical link Sending a setting deletion notification to the second communication device,
Both the first communication device and the second communication device delete the setting of the logical link;
A network configuration change method characterized by the above.
(Appendix 8)
The network configuration changing method according to appendix 7, wherein both the first communication device and the second communication device execute route change by the route switching protocol by deleting the setting of the logical link. .
(Appendix 9)
Additional note 7 or 7, wherein when the first communication device transmits a setting deletion notification of the logical link, a physical link for transmission is selected from physical links constituting the logical link according to a communication use state. 9. The network configuration changing method according to 8.
(Appendix 10)
A network having at least a communication device that implements a path switching protocol as a node,
When a logical link is set between a first communication device and a second communication device that implement a logical link setting protocol, when the first communication device inputs setting information for deleting the logical link, the logical link Sending a setting deletion notification to the second communication device,
Both the first communication device and the second communication device delete the setting of the logical link;
A network characterized by that.
(Appendix 11)
The network 1 according to appendix 10, wherein a path change by the path switching protocol is executed by deleting both the first communication apparatus and the second communication apparatus by setting the logical link.
(Appendix 12)
Supplementary note 10 or 10, wherein, when the first communication device transmits a setting deletion notification of the logical link, a physical link for transmission is selected from physical links constituting the logical link in accordance with a communication usage state. 11. The network according to 11.
(Appendix 13)
A program that causes a computer to function as a communication device that implements at least a logical link setting protocol in a communication network,
A setting input function for inputting setting information and a protocol control function for transmitting a setting deletion notification of the logical link to the other communication device when deleting a logical link between the communication device and the other communication device by the setting information;
Is realized by the computer.
(Appendix 14)
14. The program according to appendix 13, wherein the protocol control function deletes the logical link when the logical link setting deletion notification is received from the other communication device.
(Appendix 15)
15. The program according to appendix 13 or 14, wherein the protocol control function executes path reconstruction according to a path switching protocol regardless of a link maintaining operation when the logical link setting deletion is executed.
(Appendix 16)
The protocol control function, when transmitting the logical link setting deletion notification, selects a physical link for transmission in accordance with a communication usage state among physical links constituting the logical link. 15. The program according to any one of 15.
(Appendix 17)
A program that causes a computer to function as a communication device that implements at least a logical link setting protocol in a communication network,
When a logical link is set with another communication device, a protocol control function for deleting the logical link is realized by the computer when the logical link setting deletion notification is received from the other communication device. A program characterized by
(Appendix 18)
18. The program according to appendix 17, wherein the protocol control function executes route reconfiguration according to a route switching protocol regardless of link maintenance operation when the logical link setting deletion is executed.

  The present invention is applicable to a network using a plurality of protocols such as a combination of LACP (IEEE802.3ad or IEEE802.1AX) and a spanning tree protocol.

101-103, 202, 203 Communication device 401 Frame reception unit 402 Protocol analysis unit 403 Frame creation unit 404 Transmission port control unit 405 Transmission queue 406 Frame transmission unit 407 Band notification unit 408 Queue usage amount notification unit 409 Setting input unit 410 Protocol setting Reflection unit 411 Setting information storage area L101 Logical link p1, p2, p3 Physical port

Claims (10)

A communication device that implements at least a logical link setting protocol in a communication network,
A setting input means for inputting setting information and a protocol control means for transmitting a setting deletion notification of the logical link to the other communication apparatus when deleting a logical link between the communication apparatus and the other communication apparatus by the setting information;
A communication apparatus comprising:   The communication apparatus according to claim 1, wherein the protocol control unit deletes the logical link when the logical link setting deletion notification is received from the other communication apparatus.   3. The communication apparatus according to claim 1, wherein when the protocol control unit deletes the setting of the logical link, the protocol control unit executes path reconstruction in accordance with a path switching protocol regardless of a link maintenance operation. 4.   2. The protocol control unit, when transmitting a setting deletion notification of the logical link, selects a physical link for transmission in accordance with a communication usage state among physical links constituting the logical link. The communication apparatus according to any one of -3. A communication device that implements at least a logical link setting protocol in a communication network,
In the case where a logical link is set with another communication device, it has a protocol control means for deleting the logical link when the logical link setting deletion notification is received from the other communication device. Communication device.   6. The communication apparatus according to claim 5, wherein when the setting deletion of the logical link is executed, the protocol control unit executes a path reconfiguration according to a path switching protocol regardless of a link maintaining operation. A method for changing the configuration of a network having at least a communication device equipped with a path switching protocol as a node,
When a logical link is set between a first communication device and a second communication device that implement a logical link setting protocol, when the first communication device inputs setting information for deleting the logical link, the logical link Sending a setting deletion notification to the second communication device,
Both the first communication device and the second communication device delete the setting of the logical link;
A network configuration change method characterized by the above.   8. The network configuration change according to claim 7, wherein a route change by the route switching protocol is executed by deleting the logical link setting by both the first communication device and the second communication device. 9. Method. A network having at least a communication device that implements a path switching protocol as a node,
When a logical link is set between a first communication device and a second communication device that implement a logical link setting protocol, when the first communication device inputs setting information for deleting the logical link, the logical link Sending a setting deletion notification to the second communication device,
Both the first communication device and the second communication device delete the setting of the logical link;
A network characterized by that. A program that causes a computer to function as a communication device that implements at least a logical link setting protocol in a communication network,
A setting input function for inputting setting information and a protocol control function for transmitting a setting deletion notification of the logical link to the other communication device when deleting a logical link between the communication device and the other communication device by the setting information;
Is realized by the computer.

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