CN1980145A - Ethernet environment protection system and method - Google Patents
Ethernet environment protection system and method Download PDFInfo
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- CN1980145A CN1980145A CN 200510125735 CN200510125735A CN1980145A CN 1980145 A CN1980145 A CN 1980145A CN 200510125735 CN200510125735 CN 200510125735 CN 200510125735 A CN200510125735 A CN 200510125735A CN 1980145 A CN1980145 A CN 1980145A
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Abstract
The Ethernet ring protection system includes a master unit and multiple slave units located at same virtual local area network. The master unit and multiple slave units form a ring. In normal operation, controlling standby ports, the master unit only allows data packet forwarded by third layer of Ethernet ring to pass through, and prohibit data packet forwarded by second layer of Ethernet ring to pass through. When fault occurs, standby ports are opened up to allow each data packet to pass through. In time of protecting the Ethernet ring by the system, the master unit sends out Ethernet ring fault detected by the third layer carried handshake detection message timely, and using access control table configured in advance captures handshake detection messages returned from slave units. The invention quickens time of rearranging devices greatly, and raises reliability of device effectively.
Description
Technical field
The present invention relates to network communications technology field, be specifically related to a kind of Ethernet ring protection switching system and method.
Background technology
EAPS (Ethernet automatic protective system) technology is the RFC3619 definition of IETF (the Internet engineering duty group), is used for providing quick protection to the ring-like topology of Ethernet.This machining function is in Ethernet ring interconnection topology structure, and do not need to increase new hardware and interface.
The EAPS ring structure is as shown in Figure 1:
It is an EAPS territory that EAPS looks around single.Arbitrary VLAN (VLAN) that needs error protection will be arranged to comprise all of the port on the ring, then this VLAN is assigned to an EAPS territory.On this ring territory, a switch (M) is set as home site, and all other switches (T1, T2, T3) are designated as from website.The port that home site is connected to ring is designated as the master port of home site, and another port that home site is connected to ring is set as the subordinate port of home site.
Under normal circumstances, home site stops up on the subordinate port and belongs to all non-control informations in this EAPS territory, thereby avoids forming the loop on a ring, and unknown unicast and the broadcast (sites) in turn of broadcasting under loop network take place.The exchange and the study mechanism of the second layer are moved according to existing standard on this ring.
EAPS regularly carries out fault detect, when network breaks down, for example T2 among Fig. 1 and the link generation physical discontinuity between the T3, home site will be opened the subordinate port of obstruction fast so, make the obstruction link between M and the T1 become open mode, communicate with each other to guarantee to remain between four websites on the ring.
Usually, the fault detect of EAPS ring has two kinds of methods, and a kind of is the home site detection method, another kind be break down from website to the home site method for reporting.
Home site detect break down on the ring after, the protection that need encircle is switched, and mainly comprises following action: open the port of the original obstruction service VLAN of home site, i.e. the subordinate port; The control that notice slave station point is removed MAC (medium access control) address table; The shut-in time detection counter.The length of EAPS guard time depends on the length of detection time and this protection process required time.
The EAPS ring recovers if detect faulty line when guard mode, the EAPS ring need be reverted to original state.
At present, software approach is adopted in the realization of EAPS mostly, and the processing that is to say control VLAN frame all is the CPU participation and sends that the removing of the switching of device port and mac address table is also mainly controlled by CPU on the ring.Like this; the time that ring protection is switched is not only relevant with the factors such as interstitial content, protected VLAN number and MAC Address number on the ring; and also depend on disposal ability, speed and the load state of equipment CPU to a great extent; under the situation that node is more on the ring, cpu load is heavy, can not satisfy the requirement of quick protective switch.
Summary of the invention
The purpose of this invention is to provide a kind of Ethernet ring protection switching system, to improve the reliability of ethernet device.
Another object of the present invention provides a kind of Ethernet ring protection switching method; influenced by the CPU ability to overcome the EAPS guard time of realizing based on CPU software in the prior art; defective that can not the strict guarantee quick protective switch time is accelerated the protection of equipment and is switched and the fault recovery switching time.
For this reason, the invention provides following technical scheme:
A kind of Ethernet ring protection switching system; comprise the main equipment and a plurality of slave unit that are positioned at same VLAN; main equipment and each slave unit form a loop; described main equipment is used to detect the Ethernet ring fault and notifies described slave unit to carry out that error protection is switched or fault recovery is switched; described slave unit is used to control Ethernet ring and switches
When the Ethernet ring operate as normal, the standby port of main equipment blocks, and only allows to transmit the control messages of three layers of carrying of Ethernet ring, forbids transmitting two layers of data carried by data service message of Ethernet ring;
When Ethernet ring broke down, the standby port of main equipment was opened, and allowed described control messages and described data service message to pass through; Described control messages and described data service message belong to same VLAN.
Described main equipment comprises:
The message dispensing device is used for sending to slave unit periodically detecting the detect-message of shaking hands whether the Ethernet ring link breaks down, and sends switching notification message to slave unit after detecting link failure or fault recovery;
The return messages receiving system is used to receive the detect-message of shaking hands that slave unit returns, and this message is detected;
Detection time, counter was coupled in described message receiving apparatus, was used for according to message receiving apparatus the testing result that receives message being counted shake hands detect-message detection time and fault recovery detection time;
The message transmission control device is coupled in described detection time of register and described message dispensing device respectively, is used for that the control messages dispensing device sends switching notification message after detection time, register overflowed;
The loop circuit state memory is coupled in described detection time of register, is used for storage and modification Ethernet Circle current working state when detection time, register overflowed after;
Main equipment switching operation device is coupled in described loop circuit state memory, is used for controlling opening of its spare physical port or blocking according to the Ethernet Circle current working state, and removes mac address table under its ring upper port.
Described message dispensing device comprises:
The handshake information memory is used to store the detect-message of shaking hands of carrying out fault detect;
The switching notification message memory is used to store switching notification message;
The message acquiring unit is coupled in described handshake information memory and described switching notification message memory respectively, is used for obtaining switching notification message and regularly obtaining the detect-message of shaking hands according to the notice of described message transmission control device.
Described return messages receiving system comprises:
Return messages match information memory is used to store and the access control list of the detect-message coupling of shaking hands;
The return messages detecting unit is coupled in described return messages match information memory, is used for detecting according to described access control list whether the message that receives is the detect-message of shaking hands that described message dispensing device sends.
Described slave unit comprises:
Message receiving apparatus is used to receive the switching notification message and the detect-message of shaking hands that main equipment sends;
The switching time counter is coupled in described message receiving apparatus, is used for according to described switching notification message setting and startup Ethernet Circle switching time;
Slave unit switching operation device is used for removing the mac address table under the slave unit ring upper port after detecting the switching time counter and overflowing;
Message informing device is coupled in described message receiving apparatus, is used to transmit the detect-message of shaking hands that main equipment sends, and slave unit place ring upper port break down or fault recovery after, to the main equipment message of giving notice.
Described message receiving apparatus comprises:
Switching messages match information memory is used to store the access control list of mating with switching notification message;
The switching messages detecting unit is coupled in described switching messages match information memory, is used for detecting according to described access control list whether the message that receives is the switching notification message that described message dispensing device sends.
Described message informing device comprises:
The fault notification message memory is used for the storage failure notification message;
Fault recovery notification message memory is used for storage failure and recovers notification message;
The notification message acquiring unit, be coupled in described fault notification message memory and described fault recovery notification message memory respectively, be used for when slave unit detect ring upper port itself break down change after, obtain fault notification message or fault recovery notification message.
A kind of Ethernet ring protection switching method based on said system, described system comprises: be positioned at a main equipment and a plurality of slave unit of same VLAN, described method comprises:
Regularly to the shake hands detect-message of slave unit transmission by three layers of carrying, the target MAC (Media Access Control) address of the described detect-message of shaking hands is the address of three layer interfaces of receiving device for A, main equipment;
B, when the Ethernet ring normal operating condition, if main equipment has been received the fault notification message that slave unit sends or has not been received the detect-message of shaking hands that slave unit returns in the given time, then to the protection switching notification message of slave unit transmission by three layers of carrying;
C, when the Ethernet ring malfunction, if the detect-message or receive the fault recovery notification message that slave unit sends of shaking hands that main equipment receives again that slave unit returns then sends fault recovery switching notification message by three layers of carrying to slave unit;
D, slave unit carry out corresponding switching operation according to protection switching notification message of receiving or fault recovery switching notification message.
Preferably, the described detect-message of shaking hands has identical Virtual Private Network VLAN sign with described Ethernet ring data carried by data service message.
Preferably, described main equipment detects the detect-message of shaking hands that receives by pre-configured access control list.
Preferably, described slave unit detects protection switching notification message and the fault recovery switching notification message that receives by pre-configured access control list.
A kind of Ethernet ring protection switching method based on said system, described system comprises: be positioned at a main equipment and a plurality of slave unit of same VLAN, described method comprises:
Main equipment is regularly to the shake hands detect-message of slave unit transmission by three layers of carrying, the target MAC (Media Access Control) address of the described detect-message of shaking hands is the address of three layer interfaces of receiving device, and has identical Virtual Private Network VLAN sign with described Ethernet ring data carried by data service message;
When the Ethernet ring normal operating condition, HRP-configured master device only carries out three layers of forwarding, forbids two layers of forwarding;
If main equipment has been received the fault notification message that slave unit sends or has not been received the detect-message of shaking hands that slave unit returns in the given time, then to the protection switching notification message of slave unit transmission by three layers of carrying;
When the Ethernet ring malfunction, HRP-configured master device allows three layers to change and two layers of forwarding simultaneously;
If shake hands detect-message or receive the fault recovery notification message that slave unit sends that main equipment receives again that slave unit returns then sends fault recovery switching notification message by three layers of carrying to slave unit;
Slave unit carries out corresponding switching operation according to protection switching notification message of receiving or fault recovery switching notification message.
A kind of Ethernet ring protection switching method based on above-mentioned system, described system comprises: be positioned at a main equipment and a plurality of slave unit of same VLAN, described method comprises:
Main equipment regularly sends the detect-message of shaking hands to slave unit;
Main equipment detects the message that receives by pre-configured access control list;
When the Ethernet ring normal operating condition, if main equipment received the fault notification message that slave unit sends or do not received the detect-message of shaking hands that slave unit returns in the given time, then send protection switching notification message by three layers of carrying to slave unit;
When the Ethernet ring malfunction, if the detect-message or receive the fault recovery notification message that slave unit sends of shaking hands that main equipment receives again that slave unit returns then sends fault recovery switching notification message by three layers of carrying to slave unit;
Slave unit detects the message that receives by pre-configured access control list;
After slave unit is received described protection switching notification message or fault recovery switching notification message, carry out corresponding switching operation.
By above technical scheme provided by the invention as can be seen, the present invention is under the Ethernet ring normal operation, the standby port of main equipment only allows the packet of three layers of forwarding of Ethernet ring to pass through on the control ring, the packet of forbidding two layers of forwarding of Ethernet ring passes through, promptly receive only by the control information of three layers of carrying and pass through, rejection is by two layers of loaded service information, and the main equipment in the system and slave unit detect shake hands detect-message and the switching notification message of returning by ACL (access control list) respectively, therefore can make control VLAN adopt identical VLAN with data vlan, the MAC Address of packet can be any unicast mac address or multicast mac address also, has reduced the complexity that realizes.The present invention uses device chip hardware to realize that the protection of ethernet device switches, and has accelerated the protection of equipment greatly and has switched and the fault recovery switching time, has improved the reliability of equipment effectively, for network provides quick protection within the strict 50ms.And the present invention do not need to adopt special hardware technology or special chip to realize, only need increase required register sum counter resource and get final product on the basis of existing Ethernet switching chip, and the realization cost is low.
Description of drawings
Fig. 1 is the theory diagram of EAPS ring;
Fig. 2 is the topology diagram of system of the present invention;
Fig. 3 is the theory diagram of main equipment in the system of the present invention;
Fig. 4 is the theory diagram of slave unit in the system of the present invention;
Fig. 5 is the realization flow figure of the inventive method first embodiment;
Fig. 6 is the realization flow figure of the inventive method second embodiment.
Embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 2, Fig. 2 shows the topological structure of system of the present invention:
Corresponding with the Ethernet ring structure, system of the present invention comprises a main equipment and a plurality of slave unit that is positioned at same VLAN, in topological structure shown in this figure, shows three slave units: slave unit 1, slave unit 2 and slave unit 3.Main equipment and each slave unit lay respectively on the Ethernet ring, and form a loop, and main equipment is used to detect the Ethernet ring fault and notifies slave unit to carry out that error protection is switched or fault recovery is switched, and slave unit is used for control and switches.
When the Ethernet Circle operate as normal, a main equipment control one physical port (standby port) is in blocked state: promptly only allow the packet of three layers of forwarding of Ethernet ring to pass through, the packet of forbidding two layers of forwarding of Ethernet ring passes through, thereby the STP (Spanning-Tree Protocol) that guarantees Ethernet ring is a chain, avoid unknown unicast and broadcasting on loop network, to form broadcast (sites) in turn, can make the control information of this physical port reception simultaneously by three layers of carrying; When Ethernet ring broke down, main equipment was controlled this physical port and is opened, and promptly allowed this port by any packet, thus the connectedness between each equipment on guaranteeing to encircle.
On the standby port of main equipment, main equipment is to be abutted against the vlan information of the ethernet data frame of receiving and purpose ethernet address is wherein distinguished two layers of forwarding or three layers of forwarding, be that tentation data service message and control messages all belong to same VLAN (being assumed to be 100), but this time, control messages was that different target MAC (Media Access Control) address is arranged with normal data service message, having only target MAC (Media Access Control) address is the address of three layer interfaces of main equipment, just can be delivered to main equipment by standby port.And target MAC (Media Access Control) address is not the Frame of main equipment MAC Address, then can get clogged, and does not promptly carry out two layers of forwarding.And the normal data of other VLAN also all will get clogged.
For example, the target MAC (Media Access Control) address of the ethernet data frame that receives of the standby port of main equipment and VLAN are assumed to be following several:
(1)DMAC＝00?10?5c?e8?89?05 VLAN＝100
(2)DMAC＝00?10?5c?e8?89?06 VLAN＝100
(3)DMAC＝00?10?5c?e8?89?07 VLAN＝100
(4)DMAC＝00?10?5c?e8?89?08 VLAN＝100
(5)DMAC＝00?10?5c?e8?89?05 VLAN＝200
(6)DMAC＝00?10?5c?e8?89?06 VLAN＝200
(7)DMAC＝00?10?5c?e8?89?07 VLAN＝200
(8)DMAC＝00?10?5c?e8?89?08 VLAN＝200
(9)DMAC＝00?10?5c?e8?89?05 VLAN＝300
(10)DMAC＝00?10?5c?e8?89?06 VLAN＝300
(11)DMAC＝00?10?5c?e8?89?07 VLAN＝300
(12)DMAC＝00?10?5c?e8?89?08 VLAN＝300
Standby port for main equipment, the condition of judging three layers of forwarding is target MAC (Media Access Control) address DMAC+VLAN, suppose DMAC=DMAC=00 10 5c e8 8906 and VLAN=100, representative is three layers of forwarding, standby port can be delivered to the ethernet data frame with this feature the CPU of main equipment so, and the ethernet data frame that other DMAC and VLAN do not satisfy condition simultaneously all can be blocked to fall by standby port.
For existing EAPS technology, control messages must be assigned among the different VLAN with data service message, suppose that promptly VLAN=100 is a transmitting control message, this VLAN just can not be shared with data service message so, that is to say that the ethernet frame of all VLAN=100 all will be fed to main equipment.
The main equipment timed sending detect-message of shaking hands detects the Ethernet ring link, and after main equipment detected loop and breaks down, standby port was opened, and promptly allows simultaneously the message that receives is carried out three layers of forwarding and two layers of forwarding.At this moment, the ethernet data frame with DMAC=DMAC=00 10 5c e8 89 06 and VLAN=100 feature still can be sent to the CPU of main equipment, and other ethernet data frame also all can be received up, carries out normal forwarding process (two layers of forwarding).
Main equipment sends switching notification message to slave unit, after slave unit is received this message, carries out error protection and switches; After main equipment detects the loop fault recovery, send switching notification message to slave unit, after slave unit is received this message, carry out fault recovery and switch.
With reference to Fig. 3, Fig. 3 shows the theory diagram of main equipment:
Main equipment comprises: message dispensing device S1, return messages receiving system S2, message transmission control device S3, detection time counter S4, loop circuit state memory S5 and main equipment switching operation device S6.
Wherein, message dispensing device S1 is used for sending to slave unit periodically detecting the detect-message of shaking hands whether the Ethernet ring link breaks down, and sends switching notification message to slave unit after detecting link failure or fault recovery; Return messages receiving system S2 is used to receive the detect-message of shaking hands that slave unit returns, and this message is detected; Detection time, counter S4 was used for according to message receiving apparatus the testing result that receives message being counted shake hands detect-message detection time and fault recovery detection time; Message transmission control device S3 is used for control messages dispensing device transmission switching notification message after detection time, register overflowed; Loop circuit state memory S5 is used for storage and revises the Ethernet Circle current working state after detection time, register overflowed; Main equipment switching operation device S6 is used for according to the opening or closing of the spare physical port of Ethernet Circle current working state control main equipment, and removes the mac address table under the main equipment ring upper port.
When system moves, regularly send the detect-message of shaking hands by the message dispensing device by its designated port to slave unit, this message is passed through three layers of carrying of Ethernet ring, simultaneously the start detection time counter.
If shake hands detect-message in detection time in counter setting detection time, the return messages receiving system has been received the detect-message of returning from standby port of shaking hands, and then by return messages receiving system notice counter detection time the detect-message of shaking hands is counted detection time again.
When the message transmission control device detects after detection time, counter surpassed predetermined value to the count value of the detect-message detection time of shaking hands, the notification message dispensing device sends switching notification message from designated port (two ring upper port of main equipment) to slave unit, and the status modifier with the loop circuit state register is " malfunction " simultaneously; The state that main equipment switching operation device detects the loop circuit state register is opened the standby port of main equipment during for " malfunction ", to guarantee the connection between each equipment on the ring, makes the business datum normal transmission.
After Ethernet Circle breaks down, the message dispensing device still regularly sends the detect-message of shaking hands to slave unit by its designated port, in case network disaster recovery, then the return messages receiving system can be received the detect-message of shaking hands that slave unit returns again again, perhaps the fault recovery report message that initiatively sends up of other slave units.
After the return messages receiving system is received the detect-message of shaking hands that slave unit returns again, then notify the detection time counter that fault recovery is counted detection time again.When the message transmission control device detects after detection time, counter surpassed predetermined value to the count value of fault recovery detection time, the notification message dispensing device sends switching notification message from designated port to slave unit, and the status modifier with the loop circuit state register is " normal condition " simultaneously; The state that main equipment switching operation device detects the loop circuit state register is during for " normal condition ", the standby port that blocks main equipment, STP (Spanning-Tree Protocol) with the assurance Ethernet ring is a chain, avoids unknown unicast and broadcasting to form broadcast (sites) in turn on loop network.
When the return messages receiving system is received the fault recovery report message that other slave units initiatively send up, direct notification message transmission control device, make the message dispensing device send switching notification message to slave unit, the status modifier with the loop circuit state register is " normal condition " simultaneously; The state that main equipment switching operation device detects the loop circuit state register is during for " normal condition ", the standby port that blocks main equipment, STP (Spanning-Tree Protocol) with the assurance Ethernet ring is a chain, avoids unknown unicast and broadcasting to form broadcast (sites) in turn on loop network.
Message dispensing device S1 comprises: message acquiring unit S11, handshake information memory S12, switching notification message memory S13.
The detect-message of shaking hands that main equipment need send all is stored among the handshake information memory S12 in advance.When initialization, specify the main domain of dependence of the detect-message of shaking hands, such as target MAC (Media Access Control) address and source MAC, VLAN etc.The size of detect-message of supposing to shake hands is the Frame of one 64 byte, appointment so fully, and then this register needs the space of 16 * 32 bits.Also need carry sequence number (such as the sequence number that is one 32 bit) in the detect-message if shake hands, then also can increase a sequence number counter, and a sequence number territory (size is 4 bytes) is arranged in the detect-message of shaking hands.Main equipment sends when shaking hands detect-message, and hardware is put into the appointed area of the detect-message of shaking hands according to disposing the numerical value that reads current counter from this register.Detect-message of shaking hands of every transmission, the numerical value incremental variations of sequence number counter.After hardware moves CRC check certainly then, send from corresponding physical port.
The switching notification message that main equipment need send is stored among the switching notification message memory S13 in advance.It is provided with the setting as handshake information memory S12, and all territories can be appointments.Transmission can be set once, also transmission can be set repeatedly,, sequence number then also can be set distinguish if transmission is set repeatedly.
When needs send when shaking hands detect-message, then by message acquiring unit S11 current detect-message of shaking hands from handshake information memory S12 gets, the designated port by main equipment sends.When needs send switching notification message, then by message acquiring unit S11 current switching notification message from handshake information memory S13 gets, the designated port by main equipment sends.
Return messages receiving system S2 comprises: return messages detecting unit S21 and return messages match information memory S22.
The front is mentioned, in the present invention, detects from standby port by acl rule and should receive the detect-message of shaking hands of returning.Acl rule is pre-configured and be stored among the return messages match information memory S22.
The function of acl rule be used for detecting and the detect-message of relatively shaking hands in critical field.Article one, the acl rule of 144 bits can compare the critical field of 18 bytes, and the rule of one 288 bit can compare the critical field of 36 bytes.Substantially can contain main contents in the detect-message of shaking hands by critical field.If need relatively all words of field, the later action of this acl rule coupling should have a function that all compares so, that is to say that pre-configured numerical value all compares in whole shake hands the detect-message Frame and the return messages match information memory that will receive, whether just can obtain on all four conclusion.
Realize for the node of supporting a plurality of Ethernet ring examples, include a different Ethernet ring territory in each detect-message of shaking hands, as long as it is just passable that each Ethernet ring territory is disposed a different acl rule respectively, therefore this method supports the demand of a plurality of Ethernet rings to have extraordinary autgmentability simultaneously for same chip or even same chip port.
When return messages receiving system S2 receives by three layers of data packet loaded of Ethernet ring from the predetermined port of main equipment after, by return messages detecting unit S21 the acl rule of storing among the packet received and the return messages match information memory S22 is mated, if be complementary, then with the data packet discarding of receiving, notify detection time counter S4 that the detect-message of shaking hands is counted detection time again simultaneously; If be not complementary, then directly with the data packet discarding of receiving.
With reference to Fig. 4, Fig. 4 shows the theory diagram of slave unit:
Slave unit comprises: message receiving apparatus R1, switching time counter R2, slave unit switching operation device R3, message informing device R4.
Wherein, message receiving apparatus R1 is used to receive the switching notification message and the detect-message of shaking hands that main equipment sends; Switching time counter R2 is used for according to the switching notification message setting and starts the Ethernet Circle switching time; Slave unit switching operation device R3 is used for removing the mac address table under the slave unit ring upper port after detecting the switching time counter and overflowing; Message informing device R4 is used to transmit the detect-message of shaking hands that main equipment sends, and slave unit place ring upper port break down or fault recovery after, to the main equipment message of giving notice.
Receive the detect-message of shaking hands of main equipment transmission as message receiving apparatus R1 after, directly transfer to message informing device R4 and transmit; After receiving the switching notification message that main equipment sends, start switching time counter R2, after slave unit switching operation device detects switching time counter R2 and overflows, remove the MAC Address under the slave unit ring upper port.
If slave unit place ring upper port breaks down, then send message to main equipment, notice master-failure situation of change by message informing device R4.
The realization principle of message informing device R4 is identical with the realization principle of message dispensing device in the main equipment, comprising: notification message acquiring unit R41, fault notification message memory R42 and fault recovery notification message memory R43.
After slave unit detects place ring upper port and breaks down, then from fault notification message memory R42, take out corresponding fault notification message by notification message acquiring unit R41, send to main equipment; Detect the fault recovery of place ring upper port when slave unit after, then from fault recovery notification message memory R43, take out corresponding fault recovery notification message, send to main equipment by notification message acquiring unit R41.
The setting of fault notification message memory R42 and fault recovery notification message memory R43 is as the setting of handshake information memory in the main equipment, and all territories can be appointments.
Message receiving apparatus R1 comprises: switching messages detecting unit R21 and switching messages match information memory R22.
In the present invention, detect the switching notification message that slave unit receives by the configuration acl rule equally.This acl rule is pre-configured and be stored among the switching messages match information memory R22.Switching messages detecting unit R21 mates the message that slave unit receives according to this acl rule, can be the critical field coupling, also can be whole couplings.If switching notification message then starts the switching time counter, otherwise directly transmit.
With reference to Fig. 5, Fig. 5 shows the realization flow of the inventive method first embodiment, may further comprise the steps:
Step 501: regularly to the shake hands detect-message of slave unit transmission by three layers of carrying, the target MAC (Media Access Control) address of this detect-message of shaking hands is the address of three layer interfaces of receiving device to main equipment.
In normal operating conditions, main equipment judges at first whether the time of timed sending arrive, if arrive, then generates the detect-message of shaking hands, and sends from the port of appointment.When sending, begin to start the regularly counting operation of detection counter.
Step 502: when the Ethernet ring normal operating condition; if main equipment has been received the fault notification message that slave unit sends or has not been received the detect-message of shaking hands that slave unit returns in the given time, then to the protection switching notification message of slave unit transmission by three layers of carrying.
On this Ethernet ring, can be in different VLAN transmitting control message (such as, the detect-message of shaking hands) and data service message, also can be in same VLAN transmitting control message and data service message.
When control messages and data service message have identical Virtual Private Network VLAN sign, realize opening of main equipment standby port and blocking function by three layers of forwarding.When the Ethernet ring normal operating condition, main equipment is checked the message that standby port receives, only allow the message that receives is carried out three layers of forwarding, forbid two layers of forwarding, the target MAC (Media Access Control) address of detect-message is the address of three layer interfaces of main equipment owing to shake hands, therefore after main equipment receives this message, can carry out three layers of forwarding to it; And the target MAC (Media Access Control) address in other data service messages is different with the address of three layer interfaces of main equipment, if according to normal forwarding process, then need it is carried out two layers of forwarding, but in the present invention, then by configuration, can forbid that such packet carries out two layers of forwarding, thereby guarantee that STP is a chain.
The detect-message of shaking hands that main equipment sends can be returned port in appointment and be caught by main equipment, in case this message is hunted down, then is dropped.Regularly the current counting of detection counter carries out zero clearing simultaneously, makes it restart counting, so that it under normal circumstances can not overflow.
Under normal circumstances, automatically detect the number of times whether the detect-message counter of shaking hands has arrived appointment by chip ASIC (application-specific integrated circuit (ASIC)) hardware, that is to say the main equipment detect-message of shaking hands of predetermined number of times that connected timed sending, and do not receive the message that slave unit returns in the meantime always, this explanation fault occurred on the ring this moment, and the handshake information that makes main equipment send out does not turn back to the standby port of main equipment in the time of agreement.At this moment, main equipment is gone up other slave units to ring and is sent the protection switching messages, and the protection switching messages that CPU is pre-configured sends from designated port.Remove the MAC Address of ring upper port simultaneously, open the standby port of main equipment.
When Ethernet ring normally moves, fault has taken place if slave unit has detected the ring upper port of itself, then notify main equipment immediately, send fault notification message to main equipment.After main equipment is received this notice, go up other slave units to ring and send the protection switching messages, the protection switching messages that CPU is pre-configured sends from designated port.Remove the MAC Address of ring upper port simultaneously, open the standby port of main equipment.
Step 503: when the Ethernet ring malfunction, if the detect-message or receive the fault recovery notification message that slave unit sends of shaking hands that main equipment receives again that slave unit returns then sends fault recovery switching notification message by three layers of carrying to slave unit.
When the Ethernet ring malfunction, open the standby port of main equipment, main equipment is checked the message that standby port receives, and allows simultaneously the message that receives is carried out three layers of forwarding and two layers of forwarding.
Under the loop fault state, if main equipment has captured the detect-message of shaking hands that slave unit returns again, then the fault on the explanation ring is recovered, and can carry out the work that fault recovery is switched.Certainly, a counter also can be set, after receiving what correct detect-message of shaking hands continuously, prove that just loop circuit state recovers normal this detect-message of shaking hands.
If detecting loop fault by this detect-message of shaking hands, recovers main equipment, then to the fault recovery switching notification message of slave unit transmission by three layers of carrying.In this message, comprise the notice slave unit and carry out the counter that fault recovery is switched.
If at first detecting loop, recovers by slave unit, this moment, main equipment may also not detect the loop recovery, standby port still is in channel status, this moment, slave unit need be notified main equipment immediately, send the fault recovery notification message to main equipment, at this moment, slave unit does not recover the port open circuit at once.
Step 504: slave unit carries out corresponding switching operation according to protection switching notification message of receiving or fault recovery switching notification message.
Equally, protection switching notification message or fault recovery switching notification message that main equipment sends can be caught by slave unit.In case this message is hunted down, then slave unit starts the counter that the fault recovery in this message is switched, and after counter overflowed, the beginning switching operation was removed the MAC Address under the ring upper port of slave unit place.
In order to improve main equipment and slave unit to receiving catching and detection speed of message; and then accelerate equipment protection and switch and the fault recovery switching time; the reliability of raising equipment; can in main equipment and slave unit, dispose corresponding ACL respectively; by this ACL the message that receives is mated; in case the match is successful, then carry out corresponding operation.
With reference to Fig. 6, Fig. 6 shows the realization flow of the inventive method second embodiment, may further comprise the steps:
Step 601: main equipment is regularly to the shake hands detect-message of slave unit transmission by three layers of carrying.
In normal operating conditions, main equipment judges at first whether the time of timed sending arrive, if arrive, then generates the detect-message of shaking hands, and sends from the port of appointment.When sending, begin to start the regularly counting operation of detection counter.
Step 602: main equipment detects the message that receives by pre-configured ACL.
Step 603: when the Ethernet ring normal operating condition; if the ACL of main equipment captured fault notification message that slave unit sends or in the given time ACL do not capture the detect-message of shaking hands that slave unit returns, then send the protection switching notification message to slave unit.
When the Ethernet ring normal operating condition, block the standby port of main equipment.The detect-message of shaking hands that main equipment sends can be returned port in appointment and be caught by the pre-configured acl rule of main equipment, in case this message is hunted down, then is dropped.Regularly the current counting of detection counter carries out zero clearing simultaneously, makes it restart counting, so that it under normal circumstances can not overflow.
Under normal circumstances, automatically detect the number of times whether the detect-message counter of shaking hands has arrived appointment by chip ASIC (application-specific integrated circuit (ASIC)) hardware, that is to say the main equipment detect-message of shaking hands of predetermined number of times that connected timed sending, and do not receive the message that slave unit returns in the meantime always, this explanation fault occurred on the ring this moment, and the handshake information that makes main equipment send out does not turn back to the standby port of main equipment in the time of agreement.At this moment, main equipment is gone up other slave units to ring and is sent the protection switching messages, and the protection switching messages that CPU is pre-configured sends from designated port.Remove the MAC Address of ring upper port simultaneously, open the standby port of main equipment.
When Ethernet ring normally moves, fault has taken place if slave unit has detected the ring upper port of itself, then notify main equipment immediately, send fault notification message to main equipment.After main equipment is received this notice, go up other slave units to ring and send the protection switching messages, the protection switching messages that CPU is pre-configured sends from designated port.Remove the MAC Address of ring upper port simultaneously, open the standby port of main equipment.
Step 604: when the Ethernet ring malfunction, if the detect-message or capture the fault recovery notification message that slave unit sends of shaking hands that main equipment ACL captures again that slave unit returns then sends the fault recovery switching notification message to slave unit.
When the Ethernet ring malfunction, open the standby port of main equipment, main equipment is checked the message that standby port receives, and allows simultaneously the message that receives is carried out three layers of forwarding and two layers of forwarding.
Under the loop fault state, if pre-configured ACL (access control list) rule of main equipment has captured the detect-message of shaking hands that slave unit returns again, then the fault on the explanation ring is recovered, and can carry out the work that fault recovery is switched.Certainly, a counter also can be set, after receiving what correct detect-message of shaking hands continuously, prove that just loop circuit state recovers normal this detect-message of shaking hands.
If detecting loop fault by this detect-message of shaking hands, recovers main equipment, then to the fault recovery switching notification message of slave unit transmission by three layers of carrying.In this message, comprise the notice slave unit and carry out the counter that fault recovery is switched.
If at first detecting loop, recovers by slave unit, this moment, main equipment may also not detect the loop recovery, standby port still is in channel status, this moment, slave unit need be notified main equipment immediately, send the fault recovery notification message to main equipment, at this moment, slave unit does not recover the port open circuit at once.
Step 605: slave unit detects the message that receives by pre-configured ACL.
Step 606: after slave unit is received described protection switching notification message or fault recovery switching notification message, carry out corresponding switching operation.
Equally, protection switching notification message or fault recovery switching notification message that main equipment sends can be caught by the pre-configured ACL of slave unit.In case this message is hunted down, then slave unit starts the counter that the fault recovery in this message is switched, and after counter overflowed, the beginning switching operation was removed the MAC Address under the ring upper port of slave unit place.
As seen, utilize the present invention, can carry out message detection by the ACL of storage in advance, rather than as realize that by controlling VLAN the Ethernet ring error protection switches in the prior art; Simultaneously; by configuration; can make data vlan and control VLAN adopt same VLAN to transmit; business data packet is by two layers of forwarding; the control data bag is by three layers of forwarding, and main equipment detects handshake information by three layers information, has not only reduced complexity and the cost realized; and the protection of having accelerated equipment is greatly switched or the fault recovery switching time, has improved the reliability of equipment.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (13)
1, a kind of Ethernet ring protection switching system; comprise the main equipment and a plurality of slave unit that are positioned at same VLAN; main equipment and each slave unit form a loop; described main equipment is used to detect the Ethernet ring fault and notifies described slave unit to carry out that error protection is switched or fault recovery is switched; described slave unit is used to control Ethernet ring and switches; it is characterized in that
When the Ethernet ring operate as normal, the standby port of main equipment blocks, and only allows to transmit the control messages of three layers of carrying of Ethernet ring, forbids transmitting two layers of data carried by data service message of Ethernet ring;
When Ethernet ring broke down, the standby port of main equipment was opened, and allowed described control messages and described data service message to pass through; Described control messages and described data service message belong to same VLAN.
2, system according to claim 1 is characterized in that, described main equipment comprises:
The message dispensing device is used for sending to slave unit periodically detecting the detect-message of shaking hands whether the Ethernet ring link breaks down, and sends switching notification message to slave unit after detecting link failure or fault recovery;
The return messages receiving system is used to receive the detect-message of shaking hands that slave unit returns, and this message is detected;
Detection time, counter was coupled in described message receiving apparatus, was used for according to message receiving apparatus the testing result that receives message being counted shake hands detect-message detection time and fault recovery detection time;
The message transmission control device is coupled in described detection time of register and described message dispensing device respectively, is used for that the control messages dispensing device sends switching notification message after detection time, register overflowed;
The loop circuit state memory is coupled in described detection time of register, is used for storage and modification Ethernet Circle current working state when detection time, register overflowed after;
Main equipment switching operation device is coupled in described loop circuit state memory, is used for controlling opening of its spare physical port or blocking according to the Ethernet Circle current working state, and removes mac address table under its ring upper port.
3, system according to claim 2 is characterized in that, described message dispensing device comprises:
The handshake information memory is used to store the detect-message of shaking hands of carrying out fault detect;
The switching notification message memory is used to store switching notification message;
The message acquiring unit is coupled in described handshake information memory and described switching notification message memory respectively, is used for obtaining switching notification message and regularly obtaining the detect-message of shaking hands according to the notice of described message transmission control device.
4, system according to claim 2 is characterized in that, described return messages receiving system comprises:
Return messages match information memory is used to store and the access control list of the detect-message coupling of shaking hands;
The return messages detecting unit is coupled in described return messages match information memory, is used for detecting according to described access control list whether the message that receives is the detect-message of shaking hands that described message dispensing device sends.
5, system according to claim 1 is characterized in that, described slave unit comprises:
Message receiving apparatus is used to receive the switching notification message and the detect-message of shaking hands that main equipment sends;
The switching time counter is coupled in described message receiving apparatus, is used for according to described switching notification message setting and startup Ethernet Circle switching time;
Slave unit switching operation device is used for removing the mac address table under the slave unit ring upper port after detecting the switching time counter and overflowing;
Message informing device is coupled in described message receiving apparatus, is used to transmit the detect-message of shaking hands that main equipment sends, and slave unit place ring upper port break down or fault recovery after, to the main equipment message of giving notice.
6, system according to claim 5 is characterized in that, described message receiving apparatus comprises:
Switching messages match information memory is used to store the access control list of mating with switching notification message;
The switching messages detecting unit is coupled in described switching messages match information memory, is used for detecting according to described access control list whether the message that receives is the switching notification message that described message dispensing device sends.
7, system according to claim 5 is characterized in that, described message informing device comprises:
The fault notification message memory is used for the storage failure notification message;
Fault recovery notification message memory is used for storage failure and recovers notification message;
The notification message acquiring unit, be coupled in described fault notification message memory and described fault recovery notification message memory respectively, be used for when slave unit detect ring upper port itself break down change after, obtain fault notification message or fault recovery notification message.
8, a kind of Ethernet ring protection switching method based on the described system of claim 1, described system comprises: be positioned at a main equipment and a plurality of slave unit of same VLAN, it is characterized in that described method comprises:
Regularly to the shake hands detect-message of slave unit transmission by three layers of carrying, the target MAC (Media Access Control) address of the described detect-message of shaking hands is the address of three layer interfaces of receiving device for A, main equipment;
B, when the Ethernet ring normal operating condition, if main equipment has been received the fault notification message that slave unit sends or has not been received the detect-message of shaking hands that slave unit returns in the given time, then to the protection switching notification message of slave unit transmission by three layers of carrying;
C, when the Ethernet ring malfunction, if the detect-message or receive the fault recovery notification message that slave unit sends of shaking hands that main equipment receives again that slave unit returns then sends fault recovery switching notification message by three layers of carrying to slave unit;
D, slave unit carry out corresponding switching operation according to protection switching notification message of receiving or fault recovery switching notification message.
9, method according to claim 8 is characterized in that, the described detect-message of shaking hands has identical Virtual Private Network VLAN sign with described Ethernet ring data carried by data service message.
10, method according to claim 9 is characterized in that, described main equipment detects the detect-message of shaking hands that receives by pre-configured access control list.
11, method according to claim 9 is characterized in that, described slave unit detects protection switching notification message and the fault recovery switching notification message that receives by pre-configured access control list.
12, a kind of Ethernet ring protection switching method based on the described system of claim 1, described system comprises: be positioned at a main equipment and a plurality of slave unit of same VLAN, it is characterized in that described method comprises:
Main equipment is regularly to the shake hands detect-message of slave unit transmission by three layers of carrying, the target MAC (Media Access Control) address of the described detect-message of shaking hands is the address of three layer interfaces of receiving device, and has identical Virtual Private Network VLAN sign with described Ethernet ring data carried by data service message;
When the Ethernet ring normal operating condition, HRP-configured master device only carries out three layers of forwarding, forbids two layers of forwarding;
If main equipment has been received the fault notification message that slave unit sends or has not been received the detect-message of shaking hands that slave unit returns in the given time, then to the protection switching notification message of slave unit transmission by three layers of carrying;
When the Ethernet ring malfunction, HRP-configured master device allows three layers to change and two layers of forwarding simultaneously;
If shake hands detect-message or receive the fault recovery notification message that slave unit sends that main equipment receives again that slave unit returns then sends fault recovery switching notification message by three layers of carrying to slave unit;
Slave unit carries out corresponding switching operation according to protection switching notification message of receiving or fault recovery switching notification message.
13, a kind of Ethernet ring protection switching method based on the described system of claim 1, described system comprises: be positioned at a main equipment and a plurality of slave unit of same VLAN, it is characterized in that described method comprises:
Main equipment regularly sends the detect-message of shaking hands to slave unit;
Main equipment detects the message that receives by pre-configured access control list;
When the Ethernet ring normal operating condition, if main equipment received the fault notification message that slave unit sends or do not received the detect-message of shaking hands that slave unit returns in the given time, then send protection switching notification message by three layers of carrying to slave unit;
When the Ethernet ring malfunction, if the detect-message or receive the fault recovery notification message that slave unit sends of shaking hands that main equipment receives again that slave unit returns then sends fault recovery switching notification message by three layers of carrying to slave unit;
Slave unit detects the message that receives by pre-configured access control list;
After slave unit is received described protection switching notification message or fault recovery switching notification message, carry out corresponding switching operation.
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| CNB2005101257358A CN100450025C (en) | 2005-12-01 | 2005-12-01 | Ethernet environment protection system and method |
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| WO2010031296A1 (en) * | 2008-09-22 | 2010-03-25 | 中兴通讯股份有限公司 | Control method for protecting failure recovery of ethernet ring and ethernet ring nodes |
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| CN112491951A (en) * | 2020-10-20 | 2021-03-12 | 网宿科技股份有限公司 | Request processing method, server and storage medium in peer-to-peer network |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: NEW H3C TECHNOLOGIES Co.,Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: HANGZHOU H3C TECHNOLOGIES Co.,Ltd. |
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Effective date of registration: 20230804 Address after: Texas, USA Patentee after: HEWLETT PACKARD ENTERPRISE DEVELOPMENT L.P. Address before: 310052 Changhe Road, Binjiang District, Hangzhou, Zhejiang Province, No. 466 Patentee before: NEW H3C TECHNOLOGIES Co.,Ltd. |