JPH03101438A - Control system for constitution of ring lan - Google Patents
Control system for constitution of ring lanInfo
- Publication number
- JPH03101438A JPH03101438A JP1237120A JP23712089A JPH03101438A JP H03101438 A JPH03101438 A JP H03101438A JP 1237120 A JP1237120 A JP 1237120A JP 23712089 A JP23712089 A JP 23712089A JP H03101438 A JPH03101438 A JP H03101438A
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- Prior art keywords
- reconstitution
- reconfiguration
- ring
- function
- failure
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- 238000010586 diagram Methods 0.000 description 12
- 208000035224 Ring chromosome 12 syndrome Diseases 0.000 description 5
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Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、リングＬＡＮシステムに係り、特に、リング
ＬＡＮシステムにおける伝送路障害等の場合の伝送路の
再構成を行う際に、再構成機能の発振が生じることを防
止することのできるリング状ＬＡＮの構成制御方式に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ring LAN system, and particularly relates to a ring LAN system that uses a reconfiguration function when reconfiguring a transmission path in the case of a transmission path failure, etc. The present invention relates to a configuration control method for a ring-shaped LAN that can prevent oscillations from occurring.
［従来の技術］
リングＬＡＮシステムの構成制御方式に関する従来技術
として、例えば、特開昭６１−２３６２７４号公報等に
記載された技術が知られている。[Prior Art] As a prior art related to a configuration control method for a ring LAN system, for example, the technology described in Japanese Patent Application Laid-Open No. 61-236274 is known.
この従来技術は、伝送路に障害が発生した場合、その障
害が永続的に続くことを前提として、障害の切り離しを
行うものである。このため、例えば、ツイストペア・ケ
ーブルの片断線障害等の、−時的な障害が断続的に発生
するような障害の場合、障害発生時に一旦伝送路の切り
離しが行われるが、すぐに障害が回復して正常に戻るの
で、再び障害個所を組み込む動作が行われる。従って、
−時的な障害が断続的に発生するような障害の場合、前
記従来技術は、障害の切り離しと、障害個所の組み込み
を繰返し行う、再構成機能の発振を生じることがあった
。In this conventional technology, when a fault occurs in a transmission path, the fault is isolated on the assumption that the fault will continue permanently. For this reason, for example, in the case of a fault that occurs intermittently, such as a one-line disconnection fault in a twisted pair cable, the transmission path is temporarily disconnected when the fault occurs, but the fault is quickly recovered. Since the system returns to normal, the operation to incorporate the faulty part is performed again. Therefore,
- In the case of a failure in which a temporal failure occurs intermittently, the above-mentioned conventional technology may cause oscillation of the reconfiguration function, which repeatedly disconnects the failure and incorporates the failure location.
［発明が解決しようとする課Ｍ］
前記従来技術は、前述したようにリング状ＬＡＮにおけ
るツイストペア・ケーブルの片断線障害等の場合に、再
構成機能の発振を生じ、システムの信頼性を損なうとい
う間厘点を有していた。[Problem M to be solved by the invention] As described above, the conventional technology has the problem that, in the case of a disconnection failure in one of the twisted pair cables in the ring-shaped LAN, oscillation of the reconfiguration function occurs, which impairs the reliability of the system. It had an intermediate point.
本発明の目的は、前記従来技術の間原点を解決し、再構
成機能が発振した場合、これを検出して、再構成機能を
停止させることにより、リングＬＡＮシステムの信頼性
を向上させることを可能にしたリング状ＬＡＮの構成制
御方式を提供することにある。An object of the present invention is to improve the reliability of a ring LAN system by solving the origin of the prior art, detecting oscillation of the reconfiguration function, and stopping the reconfiguration function. An object of the present invention is to provide a ring-shaped LAN configuration control method that makes it possible to control the configuration of a ring-shaped LAN.
［課題を解決するための手段］
本発明によれば前記目的は、構成制御装置内に再構成制
御機構を設け、該機構により伝送路を監視し、再構成動
作が一定時間内に一定回数以上繰り返された場合、再構
成機能の動作を停止させるようにすることにより達成さ
れる。[Means for Solving the Problems] According to the present invention, the object is to provide a reconfiguration control mechanism in the configuration control device, monitor the transmission path by the mechanism, and perform the reconfiguration operation a predetermined number of times or more within a predetermined time. This is achieved by causing the reconfiguration function to stop operating if it is repeated.
［作 用］
構成制御装置内に設けられた再構成制御機構は、伝送路
の状態を監視し、片断線等の伝送路の障害の発生により
行われる、リングバック、スパーバイパス、あるいは、
ジョイニング等の再構成機能を一定時間監視すると共に
、再構成動作の回数をカウントする機能を有する。そし
て、再構成制御機構は、この再構成動作が一定時間内に
一定回数以上繰り返された場合、再構成機能の動作を停
止させる。[Function] The reconfiguration control mechanism provided in the configuration control device monitors the state of the transmission line and performs ringback, spur bypass, or
It has a function of monitoring reconfiguration functions such as joining for a certain period of time and counting the number of reconfiguration operations. Then, the reconfiguration control mechanism stops the operation of the reconfiguration function when this reconfiguration operation is repeated a predetermined number of times or more within a predetermined period of time.
これにより、本発明によれば、伝送路の片断線等の障害
による再構成の発振を抑止し、システムの信頼性の向上
を図ることができる。As a result, according to the present invention, it is possible to suppress oscillations in reconfiguration due to failures such as disconnection of one side of the transmission line, and improve the reliability of the system.
［実施例］
以下、本発明によるリング状ＬＡＮの構成側御方式の一
実施例を図面により詳細に説明する。[Embodiment] Hereinafter, an embodiment of a ring-shaped LAN configuration control system according to the present invention will be described in detail with reference to the drawings.
第１図は本発明の一実施例のシステム構成を示すブロッ
ク図、第２図は構成制御装置の構成を示すブロック図、
第３図はリング伝送路の障害時における、構成制御装置
の動作を説明する図、第４図は伝送路の構成を示す図、
第５図は伝送路片断線障害時の伝送路の信号波形を示す
図、第６図は伝送路障害時の構成制御装置の動作を説明
する図である。第１図〜第４図において、１は構成制御
装置、２は分岐装置、３はリング状伝送路、４は支Ｍ（
スパー）、５は通信装置、６は拡張ＭＡＣ機構、７は通
信制御回路、８は再構成制御機構、９は再構成動作カウ
ンタ、ＩＱは再構成動作監視タイマ、１１は再構成管理
機構、１２はプライマリリング、１３はセカンダリリン
グ、１４は受信回路、１５は送信回路である。FIG. 1 is a block diagram showing the system configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a configuration control device,
FIG. 3 is a diagram explaining the operation of the configuration control device in the event of a failure in the ring transmission path, and FIG. 4 is a diagram showing the configuration of the transmission path.
FIG. 5 is a diagram showing a signal waveform of a transmission line when a transmission line failure occurs, and FIG. 6 is a diagram illustrating the operation of the configuration control device when a transmission line failure occurs. 1 to 4, 1 is a configuration control device, 2 is a branching device, 3 is a ring-shaped transmission line, and 4 is a branch M (
5 is a communication device, 6 is an extended MAC mechanism, 7 is a communication control circuit, 8 is a reconfiguration control mechanism, 9 is a reconfiguration operation counter, IQ is a reconfiguration operation monitoring timer, 11 is a reconfiguration management mechanism, 12 1 is a primary ring, 13 is a secondary ring, 14 is a receiving circuit, and 15 is a transmitting circuit.
第１図に示す本発明の一実施例のシステムは、例えば、
トークンリングＬＡＮであり、複数の構成制御装置１が
、ツイストペア・ケーブルを２組用いて構成されるリン
グ状伝送路３を介して接続されて構成されている。各構
成制御装置１は、ツイストペア・ケーブル支線４を介し
て、さらには、分岐装置２を介して複数の通信装置５を
収容している。The system according to an embodiment of the present invention shown in FIG. 1 includes, for example,
This is a token ring LAN, in which a plurality of configuration control devices 1 are connected via a ring-shaped transmission line 3 configured using two sets of twisted pair cables. Each configuration control device 1 accommodates a plurality of communication devices 5 via a twisted pair cable branch line 4 and further via a branch device 2 .
構成制御装置１は、リング状伝送路３の障害発生時、リ
ングバックあるいはスパーバイパスを行う機能を有し、
この機能により障害を除去して、各通信装置５の通信を
持続させ、また、障害が回復すれば、リングバックある
いはスパーバイパスを解除する（以下ジョイニングとい
う）機能を有する。The configuration control device 1 has a function of performing ringback or spur bypass when a failure occurs in the ring-shaped transmission line 3,
This function has the function of removing a failure and sustaining the communication of each communication device 5, and also canceling ringback or super bypass (hereinafter referred to as joining) when the failure is recovered.
前述のような機能を有する構成制御装置１は、第２図に
示すように構成されている。The configuration control device 1 having the functions described above is configured as shown in FIG.
第２図において、拡張ＭＡＣ機構６は、伝送路３に対し
、ＩＥＥＥ８０２．５に従うビーコン（以下ＢＣＮとい
う）と呼ばれる特殊フレームの送信、該フレームの受信
検出、及び、データ送信権フレーム（以下トークンとい
う）の受信検出を行う機能を有する。また、通信制御回
路７は、伝送路３を介して、ＩＥＥＥ８０２．５に従う
通信を行い、再構成制御機構８は、リングバック、スパ
ーバイパスあるいはジョイニング等の伝送路３の再構成
を行う機能を有する。In FIG. 2, the extended MAC mechanism 6 transmits a special frame called a beacon (hereinafter referred to as BCN) according to IEEE 802.5 to the transmission line 3, detects reception of the frame, and sends a data transmission right frame (hereinafter referred to as token). ) has the function of detecting reception. Further, the communication control circuit 7 performs communication according to IEEE802.5 via the transmission path 3, and the reconfiguration control mechanism 8 has a function of reconfiguring the transmission path 3 such as ringback, super bypass, or joining. have
この再構成制御機構８は、伝送路３の障害時に構成制御
装置１が、伝送路３の再構成を行う回数をカウントする
再構成動作カウンタ９と、再構成動作を所定時間の間監
視する再構成動作監視タイマ１０と、前記再構成動作カ
ウンタ９と再構成動作監視タイマ１０とを管理する再構
成管理機構１１とにより構成されている。The reconfiguration control mechanism 8 includes a reconfiguration operation counter 9 that counts the number of times the configuration control device 1 reconfigures the transmission path 3 when the transmission path 3 fails, and a reconfiguration operation counter 9 that monitors the reconfiguration operation for a predetermined period of time. It is composed of a configuration operation monitoring timer 10 and a reconfiguration management mechanism 11 that manages the reconfiguration operation counter 9 and the reconfiguration operation monitoring timer 10.
前述のように構成される構成制御装置１に接続される伝
送路３は、現用系であるプライマリリング１２と、予備
系であるセカンダリリング１３とであり、両リング１２
．１３に拡張ＭＡＣ機構６と通信制御回路７とが接続さ
れている。The transmission line 3 connected to the configuration control device 1 configured as described above includes a primary ring 12 which is an active system and a secondary ring 13 which is a backup system.
．． The extended MAC mechanism 6 and communication control circuit 7 are connected to 13.
次に、リング伝送路３の障害時における、構成制御装置
１の動作を第３図により説明する。Next, the operation of the configuration control device 1 when a failure occurs in the ring transmission line 3 will be explained with reference to FIG.
リング伝送路３が正常状態にある場合、第３図（ａ）に
示すように、現用系のプライマリリング１２がスパー４
を介して通信装置Ｓ相互間を接続しており、このリング
１２上をトークンが周回している。拡張ＭＡＣ機構６は
、このトークンの周回を監視し、トークン無しを検出す
ると、伝送路に障害が生じたと認識し、当該構成制御装
置１の直上流の構成制御装置にＢＣＮを送出する。この
動作は、リング伝送路３に接続されている全ての構成制
御装置で行われる。When the ring transmission line 3 is in a normal state, the working primary ring 12 is connected to the spar 4 as shown in FIG.
The communication devices S are connected to each other via a ring 12, and tokens circulate on this ring 12. The extended MAC mechanism 6 monitors the circulation of this token, and when detecting the absence of a token, recognizes that a failure has occurred in the transmission path and sends the BCN to the configuration control device immediately upstream of the configuration control device 1 concerned. This operation is performed in all the constituent control devices connected to the ring transmission line 3.
ＢＣＮの送出後一定時間の間に、自構成制御装置及び他
のどの構成制御装置からのＢＣＮをも受信することがで
きなかった拡張ＭＡＣ機構６を含む構成制御装置１は、
自装置の直上流に障害点、すなわち、障害点Ｃがあるも
のとして障害個所を局所化する動作を開始する。The configuration control device 1 including the extended MAC mechanism 6 that has not been able to receive the BCN from the self-configuration control device or any other configuration control device for a certain period of time after sending the BCN,
Assuming that there is a failure point, that is, failure point C, immediately upstream of the own device, an operation to localize the failure point is started.
すなわち、この構成制御装置１は、第３図（ｂ）に示す
ように、点ａ−ｂ間でリングを折り返し接続し、自装置
に収容されている通信装置５のみによるローカルリング
を形成し、当該構成制御装置１内の拡張ＭＡＣ機構６は
、ＢＣＮを送出してローカルテストを開始する。拡張Ｍ
ＡＣ機構６は、このテストでＢＣＮが受信できない場合
、ローカルテスト失敗とみなし、スパー４を１本づつテ
ストするスパーテストを行い、障害のあるスパーをバイ
パスする。That is, as shown in FIG. 3(b), this configuration control device 1 connects the ring back and forth between points a and b to form a local ring consisting only of the communication devices 5 housed in the device itself. The extended MAC mechanism 6 in the configuration control device 1 sends out the BCN and starts a local test. Expansion M
If the AC mechanism 6 cannot receive the BCN in this test, it considers the local test to be a failure, performs a spur test in which the spurs 4 are tested one by one, and bypasses the faulty spur.
前記ローカルテストで、ＢＣＮの受信ができ、あるいは
、スパーのバイパスが完了すると、構成制御装置１は、
ローカルテスト成功とみなし、第３図（Ｃ）に示すよう
に、点ｄと点ａとの間でリング１２．１３の折り返しに
よるリングバックを行い、通信装置５相互間の通信を確
保する。When the BCN is successfully received or the spur bypass is completed in the local test, the configuration control device 1:
It is assumed that the local test is successful, and as shown in FIG. 3(C), ringback is performed by turning back the rings 12 and 13 between points d and a to ensure communication between the communication devices 5.
その後、セカンダリリング１３に接続されている拡張Ｍ
ＡＣ機構６は、障害側のセカンダリリング１３からのト
ークンの受信を監視し、セカンダリリング１３からトー
クンが受信されたことが検出されると、構成制御装置１
は、前述の障害が回復したものとして、ジョイニングを
行い、伝送路３を正常状態にもどして、通信装置５相互
間の通信を継続させる。After that, the expansion M connected to the secondary ring 13
The AC mechanism 6 monitors the reception of tokens from the secondary ring 13 on the failure side, and when it is detected that a token has been received from the secondary ring 13, the AC mechanism 6
Assuming that the above-mentioned failure has been recovered, joining is performed to return the transmission line 3 to a normal state and continue communication between the communication devices 5.
再構成制御機構８は、前述したような伝送路３の再構成
動作を監視するが、その際、再構成動作監視タイマ１０
は、伝送路３の状態を一定時間監視し、この一定時間の
経過後、再構成管理機構１１へタイムアウト通知を行う
と共に、再構成動作監視タイマ１０のリセットを行う。The reconfiguration control mechanism 8 monitors the reconfiguration operation of the transmission path 3 as described above, and at this time, the reconfiguration operation monitoring timer 10
monitors the state of the transmission line 3 for a certain period of time, and after the elapse of this certain period of time, notifies the reconfiguration management mechanism 11 of a timeout and resets the reconfiguration operation monitoring timer 10.
この間、再構成動作カウンタ９は、前述の再構成動作の
数をカウントしている。During this time, the reconfiguration operation counter 9 is counting the number of reconfiguration operations described above.
再構成管理機構１１は、再構成動作監視タイマ１０から
タイムアウト通知を受は取ると、再構成動作カウンタ９
に対し、この間の再構成動作回数の問い合わせをおこな
い、再構成動作カウンタ９から、この間の再構成動作回
数を受は取る。再構成管理機構１１は、この再構成動作
回数と、予め定めた一定数とを比較し、再構成動作回数
が一定数未滴であれば、再構成動作監視タイマ１０をリ
スタートさせると同時に、再構成動作カウンタ９をリセ
ットしてリスタートさせる。また、再構成管理機構１１
は、再構成動作回数が一定数以上であれば、障害が伝送
路の片断線障害等であり、再構成機能の発振が生じたと
して、当該構成制御装置１の再構成機能を停止させ、再
構成機能の発振を抑止する。When the reconfiguration management mechanism 11 receives a timeout notification from the reconfiguration operation monitoring timer 10, it starts the reconfiguration operation counter 9.
The number of reconfiguration operations during this period is inquired of, and the number of reconfiguration operations during this period is received from the reconfiguration operation counter 9. The reconfiguration management mechanism 11 compares the number of reconfiguration operations with a predetermined constant number, and if the number of reconfiguration operations is a certain number of drops, restarts the reconfiguration operation monitoring timer 10 at the same time. The reconfiguration operation counter 9 is reset and restarted. In addition, the reconfiguration management mechanism 11
If the number of reconfiguration operations exceeds a certain number, it is assumed that the failure is a one-way disconnection failure in the transmission line, and oscillation of the reconfiguration function has occurred, and the reconfiguration function of the configuration control device 1 is stopped and the reconfiguration function is restarted. Suppresses configuration function oscillation.
この場合、再構成機能停止後の伝送路の状態は、第３図
（ａ）、（Ｃ）のいずれの状態となってもよく、また、
予め定めた特定の状態となるように制御することも可能
である。In this case, the state of the transmission path after the reconfiguration function is stopped may be either the state shown in FIG. 3(a) or (C), and
It is also possible to control to a specific predetermined state.
次に、第４図により伝送路構成の詳細と、通信制御回路
７について説明する。Next, the details of the transmission line configuration and the communication control circuit 7 will be explained with reference to FIG.
通信制御装置７は、受信回路１４と、送信回路１５とを
備えて構成されている。そして、受信回路１４は、デー
タの受信、コピー、フレームチエツクを行う機能を有し
、送信回路１５は、データの送信を行う機能を備えてい
る。The communication control device 7 includes a receiving circuit 14 and a transmitting circuit 15. The receiving circuit 14 has functions of receiving data, copying data, and checking frames, and the transmitting circuit 15 has a function of transmitting data.
また、プライマリリング１２は、Ｇ＆に１ｓとＲＭＡ１
７とにより構成され、これらの線間に通信制御回路７と
拡張ＭＡＣ機構６とが接続されている。In addition, the primary ring 12 has 1s and RMA1 in G&.
7, and a communication control circuit 7 and an extended MAC mechanism 6 are connected between these lines.
セカンダリリング１３は、同様に、Ｂ線１８とＯ線１９
とにより構成され、これらの線間に図示しないセカンダ
リリング側の通信制御回路７と拡張ＭＡＣ機構６とが接
続されている。Similarly, the secondary ring 13 has a B line 18 and an O line 19.
A secondary ring side communication control circuit 7 and an extended MAC mechanism 6 (not shown) are connected between these lines.
次に、伝送路片断線障害時の通信制御回路７の動作と、
伝送路上のの信号波形について第５図を参照して説明す
る。Next, the operation of the communication control circuit 7 at the time of a transmission line disconnection failure,
The signal waveform on the transmission path will be explained with reference to FIG.
伝送路３の正常時、受信回路１４は、Ｇ線１６及びＲＭ
１７からデータ受信に伴う信号を受信すると、どちらか
一方の受信信号を反転させて、Ｇ線１６及びＲｉＪ１７
の信号波形を加え、この信号の電圧値がある一定の電圧
を越えると“１′、この信号の電圧値がある一定の電圧
を越えない場合゛Ｏ”としてデータの認識を行っている
。When the transmission line 3 is normal, the receiving circuit 14 connects the G line 16 and the RM
When a signal associated with data reception is received from the G line 16 and the RiJ 17, one of the received signals is inverted and the G line 16 and the RiJ 17
The data is recognized as "1" when the voltage value of this signal exceeds a certain voltage, and as "O" when the voltage value of this signal does not exceed a certain voltage.
いま、第４図において、Ｒ線１７の点ｅ−ｆ間で片断線
障害が生じたとする。このような片断線障害の場合、断
線した片線上の信号電圧は、“０”となるはずであるが
、トークンリングＬＡＮの場合、その最大伝送速度が４
Ｍｂｐｓであるため、断線した点、この例では点ｅ−ｆ
間で信号が伝達されない場合と、点ｅから点ｆへ信号が
飛び越えて伝送される場合とが生じる。Now, in FIG. 4, it is assumed that a one-line disconnection fault occurs between points e and f on the R line 17. In the case of such a single wire breakage failure, the signal voltage on the broken wire should be "0", but in the case of a token ring LAN, the maximum transmission speed is 4.
Mbps, so the point of disconnection, in this example, point e-f
There are cases in which a signal is not transmitted between the points, and cases in which a signal is transmitted from point e to point f by jumping.
すなわち、第４図の例では、Ｇ線側の信号が第５図（ａ
）に示すような波形のとき、Ｒ線側の信号の反転波形が
、例えば、第５図（ｂ）に示すようになり、これらの信
号を加算した信号は第５図（Ｃ）に示すような波形とな
る。このような状況は、片断Ｍ障害の場合、断続的に発
生することになり、この結果、伝送路上を伝送されるト
ークン、ＢｅＮ等のフレームは、検出されたり、検出で
きなかったりすることになる。That is, in the example of FIG. 4, the signal on the G line side is as shown in FIG.
), the inverted waveform of the signal on the R line side will be as shown in Figure 5(b), and the signal obtained by adding these signals will be as shown in Figure 5(C). It becomes a waveform. Such a situation will occur intermittently in the case of a single M fault, and as a result, frames such as tokens and BeN transmitted on the transmission path may or may not be detected. .
従来技術の場合、前述のような状況で伝送路の構成動作
を繰り返し行っていたが、本発明の実施例においては、
前述したように、一定時間内に、伝送路の再構成動作を
一定回数以上繰り返すと、これを検出して、再構成機能
を停止することができるので、再構成の発振を抑止する
ことができる。In the case of the conventional technology, the operation of configuring the transmission path was repeatedly performed in the above-mentioned situation, but in the embodiment of the present invention,
As mentioned above, if the reconfiguration operation of the transmission path is repeated more than a certain number of times within a certain period of time, this can be detected and the reconfiguration function can be stopped, making it possible to suppress reconfiguration oscillations. .
次に、第６図を参照して、Ｒ＆％片断線伝送路障害時の
構成制御装置の動作シーケンスについて説明する。Next, with reference to FIG. 6, the operation sequence of the configuration control device in the event of an R&% one-line disconnection transmission line failure will be described.
（ｉ）再構成動作監視タイマ１０は、構成制御装置１の
運用開始と同時に、所定時間もの計時を開始し、伝送路
上を周回しているトークンが無くなったことにより、伝
送路の障害発生を検出する。(i) The reconfiguration operation monitoring timer 10 starts counting time for a predetermined period of time at the same time as the configuration control device 1 starts operating, and detects the occurrence of a failure in the transmission path when there are no more tokens circulating on the transmission path. do.
（ｉｆ）構成制御装置１は、前述の障害発生により、障
害点検出のためＢＣＮを送信する。(if) The configuration control device 1 transmits the BCN in order to detect the point of failure due to the occurrence of the aforementioned failure.
（ｕｉ）第４図、第５図で説明したように、伝送路の片
断線障害の場合には、ＢＣＮを通過させてしまうことが
あり、構成制御装置１は、このＢＣＮが障害点を通過し
周回したことを検出し、構成制御を終了する。(ui) As explained in FIGS. 4 and 5, in the case of a one-line disconnection failure in the transmission line, the BCN may be passed through, and the configuration control device 1 is configured to prevent this BCN from passing through the failure point. Detects that the system has completed the rotation, and terminates configuration control.
（ｉｖ）前述でＢＣＮが検出できない場合、リングバッ
クを行い、障害回線側からのトークンの監視を行い、障
害回復の検出も行い得るようにして構成制御を終了し、
障害回復検出時にはジョイニングを行う。(iv) If the BCN cannot be detected as described above, perform ringback, monitor tokens from the failed line side, and complete configuration control so that failure recovery can also be detected;
Joining is performed when failure recovery is detected.
再構成動作監視タイマ１０のタイムアウトまでに、前述
の構成動作、すなわち、ＢＣＮ送出動作の開始回数、あ
るいは、リングパックとジョイニングの回数が何回行わ
れたかを、再構成動作カウンタ９がカウントし、構成制
御装置１は、このカウント値が予め定められた所定値ｎ
に満たない場合、再構成動作監視タイマ１ｏ及び再構成
動作カウンタ９をリセットして、再度前述の動作を繰り
返し、前記カウント値が所定値ｎを越えた場合、再構成
動作を停止し、これにより、２重化された伝送路の片断
線障害による再構成機能の発振を抑止する。The reconfiguration operation counter 9 counts how many times the configuration operation described above, that is, the number of times the BCN sending operation is started or the number of ring packs and joining is performed, until the reconfiguration operation monitoring timer 10 times out. , the configuration control device 1 sets this count value to a predetermined value n.
If the count value exceeds the predetermined value n, the reconfiguration operation monitoring timer 1o and the reconfiguration operation counter 9 are reset and the above-mentioned operation is repeated. , suppresses oscillation of the reconfiguration function due to a disconnection failure in one of the duplexed transmission lines.
［発明の効果］
以上説明したように本発明によれば、２重化されたリン
グ状伝送路を持つリング状ＬＡＮにおいて、伝送路に片
断線が発生した場合、構成制御装置の再構成機能の発振
を抑止することができるので、構成制御が無限に続くこ
とを防止することができ、リング状ＬＡＮの信頼性の向
上を図ることができる。[Effects of the Invention] As explained above, according to the present invention, in a ring-shaped LAN having duplicated ring-shaped transmission lines, when a disconnection occurs in the transmission line, the reconfiguration function of the configuration control device is activated. Since oscillation can be suppressed, configuration control can be prevented from continuing indefinitely, and the reliability of the ring-shaped LAN can be improved.
第１図は本発明の一実施例のシステム構成を示すブロッ
ク図、第２図は構成制御装置の構成を示すブロック図、
第３図はリング伝送路の障害時における、構成制御装置
の動作を説明する図、第４図は伝送路の構成を示す図、
第５図は伝送路片断線障害時の伝送路の信号波形を示す
図、第６図は伝送路障害時の構成制御装置の動作を説明
する図である。
１・・・・・・構成制御装置、２・・・・・・分岐装置
、３・・・・・・リング状伝送路、４・・・・・・支線
（スパー）、５・・・・・・通信装置、６・・・・・・
拡張ＭＡＣ機構、７・・・・・・通信制御回路、８・・
・・・・再構成制御機構、９・・・・・・再構成動作カ
ウンタ、１０・・・・・・再構成動作監視タイマ、１１
・・・・・・再構成管理機構、１２・・・・・・プライ
マリリング、１３・・・・・・セカンダリリング、１４
・・・・・・受信回路、１５・・・・・・送信回路。
第
図
１０： 再ｘａ’ｔｒｙｔ＊＝；ｒｔｖｙイア鷹へ制御
校Ｉ
盪侑状亙
第４図
訂FIG. 1 is a block diagram showing the system configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a configuration control device,
FIG. 3 is a diagram explaining the operation of the configuration control device in the event of a failure in the ring transmission path, and FIG. 4 is a diagram showing the configuration of the transmission path.
FIG. 5 is a diagram showing a signal waveform of a transmission line when a transmission line failure occurs, and FIG. 6 is a diagram illustrating the operation of the configuration control device when a transmission line failure occurs. 1... Configuration control device, 2... Branching device, 3... Ring-shaped transmission line, 4... Branch line (spar), 5... ...Communication device, 6...
Extended MAC mechanism, 7... Communication control circuit, 8...
... Reconfiguration control mechanism, 9... Reconfiguration operation counter, 10... Reconfiguration operation monitoring timer, 11
... Reconfiguration management mechanism, 12 ... Primary ring, 13 ... Secondary ring, 14
...Reception circuit, 15...Transmission circuit. Figure 10: Re-xa'tryt*=;rtvy Ia Hawk to Control School I
Claims (1)
る構成制御装置を備えるリング状ＬＡＮシステムにおい
て、前記構成制御装置は、伝送路障害を検出して障害点
の切り離しを行い、障害の回復により伝送路を元の状態
に戻す伝送路の再構成機能を備え、所定時間内に、所定
回数以上の再構成動作が行われた場合、前記再構成機能
を停止させることを特徴とするリング状ＬＡＮの構成制
御方式。1. In a ring-shaped LAN system equipped with a configuration control device serially connected on a duplex ring transmission path, the configuration control device detects a transmission path failure, isolates the point of failure, and recovers from the failure. The ring-shaped device has a transmission path reconfiguration function that returns the transmission path to its original state, and stops the reconfiguration function if the reconfiguration operation is performed a predetermined number of times or more within a predetermined time. LAN configuration control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1237120A JP2671930B2 (en) | 1989-09-14 | 1989-09-14 | Ring LAN configuration control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1237120A JP2671930B2 (en) | 1989-09-14 | 1989-09-14 | Ring LAN configuration control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03101438A true JPH03101438A (en) | 1991-04-26 |
| JP2671930B2 JP2671930B2 (en) | 1997-11-05 |
Family
ID=17010709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1237120A Expired - Lifetime JP2671930B2 (en) | 1989-09-14 | 1989-09-14 | Ring LAN configuration control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2671930B2 (en) |
-
1989
- 1989-09-14 JP JP1237120A patent/JP2671930B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2671930B2 (en) | 1997-11-05 |
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