JP2006310976A - Communication apparatus and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication apparatus capable of informing of a backup state and an initialize state and contributing to the enhancement of the maintenance performance of a router. <P>SOLUTION: In a router 1, when the state of the router 1 shifts from the initialize state into a master state, a database 11 stores a master state being a present state, the initialize state being a state before transition to the present state, a VR-ID, a VRF name, an interface number, the state of preemption, priority, a virtual IP address, the propriety of suspend, and an IP address of a communication apparatus in the master state. A notice section 13 references a corresponding part of the database 11 and a conditional database 12, and informs a monitor computer 2 about contents including a present state stored in the database 11 when the corresponding part of the database 11 stores contents whose notice is required in the conditional database 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication device using the VRRP protocol.

  FIG. 4 is a diagram illustrating a virtual router configured using two routers using the VRRP protocol. Here, the router 1A and the router 1B constitute a virtual router. The router 1A and the router 1B are each connected to the Ethernet (registered trademark) 100 via a physical communication line. From the terminal 101 connected to the Ethernet (registered trademark) 100, one router (virtual router) is connected. For example, a packet addressed to a terminal on the Internet and a packet transmitted from the terminal to the terminal 101 are routed.

  FIG. 5 is an operation sequence diagram of the virtual router shown in FIG. The same VR-ID is assigned to the router 1A and the router 1B constituting one virtual router. Further, for example, a priority (priority: 1 to 255) is assigned to the router 1A (eg, 200), and a lower priority (eg, 100) is assigned to the router 1B.

  When the router 1A and the router 1B are activated and each of them is initialized, the priority is notified to each other, the router 1A having a higher priority transitions to a master state (S1), and the router 1B having a lower priority transitions to a backup state (S3). Note that the router 1A and the router 1B may break down or be suspended by a user such as a maintenance person to be initialized (S5, S7), but when the failure or suspend is released, the original state is restored. Transition to.

  The router 1A in the master state transmits VRRP packets at regular time intervals to the router 1B in the backup state (S11). Under such circumstances, when the router 1A fails (S13), the VRRP packet to the router 1B is interrupted. If the VRRP packet is not transmitted for a certain period of time after the last VRRP packet is transmitted, the router 1B transitions to the master state (S15). At this time, the router 1B is mastered by the monitoring computer 2 used by a user such as a maintenance person. The fact that the state has been changed and its own IP address are notified (S17). As a result, the user knows that the router 1B is in the master state.

  Thereafter, when the router 1A is initialized, recovered, and becomes a master (S19), the router 1A transmits a VRRP packet to the router 1B again (S21). As described above, when a VRRP packet is transmitted from a router having a higher priority than itself, the router 1B shifts to a backup state (S23).

Also, the router 1A notifies that it has transitioned to the master state and its own IP address (S25). As a result, the user knows that the router 1A is in the master state.
Network Working Group, Request for Comments: 3768 Virtual Router Redundancy Protocol (VRRP) Network Working Group, Request for Comments: 2787 Definitions of Managed Objects for the Virtual Router Redundancy Protocol

  As described above, in the past, it is possible to know the router whose current state is the master state, but it cannot know the router whose current state is the backup state or the router that is the initializing state. .

  In addition, as described above, when the router 1B transmits a VRRP packet from a router having a higher priority than itself, the operation to transit to the backup state is limited when the preemption is in an effective state. Knowing helps to know the reason for transitioning to the master state, but in the past, the preemption state cannot be known. Also, knowing not only the preemption status but also other information such as whether or not to suspend can contribute to improving the maintainability of the router.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a communication device that can notify a backup state and an initialization state, and maintainability of a router. It is a further object to provide a communication device that contributes to improvement.

  In order to solve the above problems, the present invention of claim 1 is provided in a communication device that uses the VRRP protocol to change the state between an initialization state, a master state, and a backup state, The state before the transition to the current state, the VR-ID, the VRF name, the interface number, the preemption state, the priority, the virtual IP address, the suspendability, and the master state communication device A communication unit comprising: a database in which an IP address is stored; and a notification unit that notifies at least the current state stored in the database regardless of the contents when the state transitions. And

  The present invention of claim 2 is characterized in that the notification means stores the state before transition to the current state, VR-ID, VRF name, and interface number stored in the database when the state transitions. The communication apparatus according to claim 1, wherein the communication device according to claim 1, wherein the preemption state, priority, virtual IP address, suspendability, and IP address of the communication device in the master state are notified.

  The present invention of claim 3 is provided in a communication device that uses the VRRP protocol to change the state between an initialization state, a master state, and a backup state. A database that stores the status, VR-ID, VRF name, interface number, preemption status, priority, virtual IP address, suspendability, and IP address of the communication device in the master state , A condition database in which the necessity of notification is set in advance for any one or more of the contents, and when the state transitions, the database and the condition database are referred to, and the condition database needs notification When the set contents are stored in the database, the current state stored in the database The and solutions with a communication apparatus characterized by comprising a notification unit configured to at least notify regardless of their content.

  According to a fourth aspect of the present invention, there is provided the communication apparatus according to the third aspect, wherein the interface number is included in the contents in which the necessity of notification is set.

  The present invention of claim 5 further comprises notification necessity setting means for setting in the condition database whether or not notification according to the content of an instruction input from the user to the computer is required. The communication device is used as a solution.

  The sixth aspect of the present invention provides a computer program for causing a computer to function as the communication device according to any one of the first to fifth aspects.

  The seventh aspect of the present invention uses a computer-readable recording medium on which the computer program according to the sixth aspect is recorded as a solving means.

  According to the present invention, it is possible to provide at least a notification means for notifying the current state stored in the database regardless of the contents thereof, so that the user can use the communication device or the initialization state in which the current state is a backup state. A certain communication device can be known. In addition, a communication device in a state before transition to the current state, VR-ID, VRF name, interface number, preemption state, priority, virtual IP address, suspendability, and master state By notifying the IP address of the user, the user can select these contents and maintainability is improved.

  Embodiments of a communication apparatus according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a configuration and usage form of a router that is a communication apparatus according to the present embodiment. The router 1 is a router that uses the VRRP protocol to change a state between an initialization state, a master state, and a backup state, and a virtual router together with a router (not shown) that becomes a backup state when the master state is reached. It constitutes. The router 1 notifies each content including its current state to the monitoring computer 2 used by a user such as a maintenance person.

  The router 1 includes a database 11 in which contents including the current state are stored, a condition database 12 in which necessity of notification is preset for an interface number or the like that is one of the contents, and a state. When the transition is made, the database 11 and the condition database 12 are referred to. When the contents set to be notified in the condition database 12 are stored in the database 11, the current state stored in the database 11 is started. A notification unit 13 as notification means for notifying the monitoring computer 2 of each content to be performed, and a notification necessity setting means for setting in the condition database 12 whether notification is required according to the content of the instruction input from the user to the monitoring computer 2 A notification necessity setting unit 14.

  FIG. 2 is a diagram showing the contents stored in the database 11 together with a schematic description thereof.

  As defined by the VRRP protocol, the database 11 includes a current state, a state before transition to the current state, a VR-ID, a VRF name, an interface number, a preemption state, a priority, and the like. The virtual IP address, the possibility of suspension, and the IP address of the router in the master state are stored.

  As the current state and the state before transitioning to the current state, an initialization state, a backup state, or a master state is stored.

  For example, the VR-ID is assigned to each group such as a company using a virtual router configured by the router 1, and the VRF name is assigned to each department of the company, for example.

  The interface number is the type of interface board (type of 16-port fastethernet, 8-port fastethernet, 1-port gigabitethernet, 2-port gigabitethernet, etc.), the slot number into which the interface board is inserted, and the interface board. It has three meanings: used port number.

  The preemption state is stored as valid or invalid.

  A value from 0 to 255 is stored as the priority.

  As the virtual IP address, addresses from 0.0.0.0. To 255.255.255.255 are stored as IP addresses assigned to the virtual router configured by the router 1.

  Whether suspension is possible or not is stored as to whether suspension is possible (valid) or impossible (invalid).

  As the IP address of the communication device in the master state, the address of 0.0.0.0. To 255.255.255.255 is the IP address of the router 1 when the router 1 is in the master state, or other addresses constituting the virtual router together with the router 1 The IP address of the router when the router is in the master state is stored.

  FIG. 3 is a diagram showing the contents stored in the condition database 12.

  In the condition database 12, a flag indicating that notification is required for a set of VR-ID, VRF name, and interface number indicated by [VR-ID], [VRF-name], and [interface number] ( For example, on) is associated.

  [VR-ID], [VRF-name], and [interface number] can be omitted. For example, when [VR-ID] and [VRF-name] are omitted, [VR number] is notified to [interface number]. Is associated with a flag (on) indicating that is necessary.

  Further, instead of the flag (on) indicating that notification is necessary, a flag (for example, off) indicating that notification is not required is associated.

  Next, the operation of the present embodiment will be described.

For example, the user
set alarm vrrp [VR-ID] [VRF-name] [interface number]
Enter a command of the type The set alarm vrrp at this time indicates that notification is required for the set of VR-ID, VRF name, and interface number indicated by [VR-ID] [VRF-name] [interface number]. 12 indicates that it should be stored.

  [VR-ID], [VRF-name], and [interface number] can be omitted. For example, omit [VRF-name] and [interface number] or [interface number] and send notifications only for the company indicated by [VR-ID] and the department indicated by [VRF-name] and [interface number]. Can be done. [VRF-name] and [interface number] can be omitted, and notification can be performed only for the interface indicated by [interface number].

  When the user inputs this command to the monitoring computer 2, the monitoring computer 2 transmits this command to the router 1, and in the router 1, one of [VR-ID], [VRF-name], and [interface number] is included in the command. Is included, the notification necessity setting unit 14 associates a flag (for example, on) indicating that notification is necessary with a part other than set alarm vrrp of the command in the condition database 12. On the other hand, if all of [VR-ID], [VRF-name], and [interface number] are omitted in the command, the notification necessity setting unit 14 notifies the condition database 12 of all state transitions. Remember that you need it.

In addition, the user can set the monitoring computer 2
del alarm vrrp [VR-ID] [VRF-name] [interface number]
Enter a command of the type The del alarm vrrp at this time indicates that notification is not required for the set of VR-ID, VRF name, and interface number indicated by [VR-ID], [VRF-name], and [interface number]. This indicates that the condition database 12 should be stored.

  As in the case of set alarm vrrp, [VR-ID], [VRF-name], and [interface number] can be omitted.

  When the user inputs this command to the monitoring computer 2, the monitoring computer 2 transmits this command to the router 1, and in the router 1, one of [VR-ID], [VRF-name], and [interface number] is included in the command. Is included, the notification necessity setting unit 14 associates a flag (for example, off) indicating that notification is not necessary with a part other than del alarm vrrp of the command in the condition database 12. On the other hand, if all of [VR-ID], [VRF-name], and [interface number] are omitted in the command, the notification necessity setting unit 14 notifies the condition database 12 of all state transitions. Remember that it is unnecessary.

In addition, the user can set the monitoring computer 2
dsp alarm vrrp
The monitoring computer 2 transmits this command to the router 1, and the router 1 transmits the contents stored in the condition database 12 to the monitoring computer 2. Based on this, the monitoring computer 2
VR-ID VRF-name interface number alarm
[VR-ID * 1] [VRF-name * 1] [interface number * 1] on
[VR-ID * 2] [VRF-name * 2] off
Display in the format.

  [VR-ID * 1] [VRF-name * 1] [interface number * 1] on is the VR-ID indicated by [VR-ID * 1] [VRF-name * 1] [interface number * 1] , Indicating that notification is required for a set of VRF name and interface number.

  Conversely, [VR-ID * 2] [VRF-name * 2] on is the VR-ID indicated by [VR-ID * 2] [VRF-name * 2], the VRF name, and any interface number. It is shown that no notification is required for the group.

  In the router 1, for example, when the state transitions from the initialized state to the master state, the database 11 stores the current state of the master and the state before the transition to the current state. The state, VR-ID, VRF name, interface number, preemption state, priority, virtual IP address, suspendability, and IP address of the communication device in the master state are stored.

  Note that the current state, the state before transitioning to the current state, the VR-ID, and the like are also stored in other state transitions.

In any case, when such contents are stored in the database 11, the notification unit 13 refers to the relevant part of the database 11 and the condition database 12, and the contents set to be notified in the condition database 12 are stored in the database 11. When stored in the part, each content including the current state stored in the database 11 is stored.
[yyyy / mm / dd hh: mm: ss]
VRRP state changed from [A] to [B]
VR-ID [VR-ID * 1]
VR-name [VR-name * 1]
interface number [interface number * 1]
Preemption [Preemption * 1]
Priority [Priority * 1]
Virtual IP [Virtual IP * 1]
Suspend [Suspend * 1]
Master IP [Master IP * 1]
Is notified to the monitoring computer 2, and the monitoring computer 2 displays this.

  In this format, [yyyy / mm / dd hh: mm: ss] stores and displays the date, hour, minute and second of the state transition. [A] stores and displays the state before the transition to the current state.

[B] stores and displays the current state. For example, VRRP state changed from B to M indicates a transition from the backup (B) state to the master (M) state. The initialization state is indicated by (I). [VR-ID * 1], [VR-name * 1], [interface number * 1], [Preemption * 1], [Priority * 1], [Virtual IP * 1], [Suspend * 1], [Master IP * 1] stores VR-ID, VRF name, interface number, preemption status, priority, virtual IP address, suspendability, and IP address of the router in the master status. And displayed.

  Actually, only when preemption is enabled, [Preemption * 1] is displayed as, for example, on, and when preemption is disabled, [Preemption * 1] is not displayed and can be suspended. [Suspend * 1] is displayed only as (Suspend * 1) only when it is (valid), and [Suspend * 1] is not displayed when suspending is impossible (invalid). Of course, it may be clearly indicated as off.

  In the above description, in the condition database 12, the necessity of notification is associated with the set of VR-ID, VRF name, and interface number, and each content can be omitted. The preemption state may be associated with the necessity of notification, and, for example, the notification may be made only when the preemption is valid.

  In the above description, the router is an example of a communication device. However, the present invention may be applied to other communication devices.

  In the above description, the notification destination is the monitoring computer 2, but the notification destination may be a display unit or a virtual terminal (telnet) provided in the router 1. Further, the operation system may be a notification destination using a standard management communication protocol such as the trap message (IETF RFC1215) of the management communication protocol SNMP.

  Further, in the above description, the router 1 that has made a state transition notifies itself, but the notification may be made to the monitoring computer 2 as required.

  As described above, according to the present embodiment, by providing at least notification means for notifying the current state stored in the database regardless of the contents, the user is in a backup state. It is possible to know the communication device and the communication device in the initialized state.

  Further, the notification means stores the state before transition to the current state, VR-ID, VRF name, interface number, preemption state, priority stored in the database when the state transitions. By notifying the virtual IP address, the suspendability, and the IP address of the communication device in the master state, the user can select these contents and the maintainability is improved.

  In addition, the VRRP protocol is provided in a communication device that changes the state between the initialization state, the master state, and the backup state, and the VR-ID is the current state, the state before the transition to the current state, and the VR-ID. A database storing VRF name, interface number, preemption status, priority, virtual IP address, suspendability, and IP address of the communication device in the master state, and any of the contents A condition database in which the necessity of notification is set in advance for one or more, and when the state transitions, the database and the condition database are referred to, and the contents set to be notified in the condition database are stored in the database. At least the current state stored in the database, regardless of its contents. Notifying means and by having a to the user can be the current state know communication device is a state of the communication device and initializing a state of the backup.

  Further, since the interface number is included in the contents in which the necessity of notification is set, the user can know the state for each interface.

  In addition, by providing notification necessity setting means for setting the necessity of notification according to the contents of the instruction input from the user to the computer in the condition database, only notification desired by the user can be received. Further improve.

  A computer program that causes the router or monitoring computer to execute the above-described processing is stored in a computer-readable recording medium such as a semiconductor memory, magnetic disk, optical disk, magneto-optical disk, or magnetic tape, or a communication network such as the Internet. And can be widely distributed.

It is a figure which shows the structure and utilization form of the router which is a communication apparatus which concerns on this Embodiment. It is the figure which showed each content memorize | stored in the database 11 with the outline description. It is a figure which shows the content memorize | stored in the condition database. It is a figure which shows the virtual router comprised using the VRRP protocol by two routers. FIG. 5 is an operation sequence diagram of the virtual router illustrated in FIG. 4.

Explanation of symbols

1 router 2 monitoring computer 11 database 12 condition database 13 notification unit 14 notification necessity setting unit

Claims (7)

The VRRP protocol is used in a communication device that changes the state between the initialization state, the master state, and the backup state. The current state, the state before the transition to the current state, the VR-ID, A database storing a VRF name, an interface number, a preemption state, a priority, a virtual IP address, suspendability, and an IP address of a communication device in a master state;
A communication device comprising: notification means for notifying at least the current state stored in the database regardless of the contents when the state transitions. The notification means stores a state before transition to the current state, a VR-ID, a VRF name, an interface number, a preemption state, and a priority stored in the database when the state transitions. The communication apparatus according to claim 1, wherein the virtual IP address, the suspendability, and the IP address of the communication device in the master state are notified. The VRRP protocol is used in a communication device that changes the state between the initialization state, the master state, and the backup state. The current state, the state before the transition to the current state, the VR-ID, A database storing a VRF name, an interface number, a preemption state, a priority, a virtual IP address, suspendability, and an IP address of a communication device in a master state;
A condition database in which the necessity of notification is preset for any one or more of the contents;
When the state transitions, the database and the condition database are referred to, and when the contents set to be notified in the condition database are stored in the database, the current state stored in the database is displayed. A communication device comprising: at least a notification means for notifying regardless of the contents. The communication apparatus according to claim 3, wherein an interface number is included in contents in which the necessity of notification is set. 5. The communication apparatus according to claim 3, further comprising notification necessity setting means for setting, in the condition database, necessity of notification according to contents of an instruction input from a user to a computer.   A computer program for causing a computer to function as the communication device according to claim 1.   A computer-readable recording medium on which the computer program according to claim 6 is recorded.

Images