CN100469036C - An implementation method for industrial Ethernet fast-speed redundancy - Google Patents
An implementation method for industrial Ethernet fast-speed redundancy Download PDFInfo
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- CN100469036C CN100469036C CNB2007100030416A CN200710003041A CN100469036C CN 100469036 C CN100469036 C CN 100469036C CN B2007100030416 A CNB2007100030416 A CN B2007100030416A CN 200710003041 A CN200710003041 A CN 200710003041A CN 100469036 C CN100469036 C CN 100469036C
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Abstract
The invention discloses a realizing method of rapid reserving design of redundant looped network of industrial Ethernet, which comprises the following steps: presetting a main station, multiple secondary stations in the looped network; setting TEST report to transmit periodically through main station equipment under normal condition; detecting the report; maintaining the logic breakpoint in the main station of the topology in the entire network; detecting the adjacent joint looped port conditions of the breakpoint when the joint on the network is broken; opening original blocked port through main equipment; refreshing MAC address list through all joints on the network; changing the data route in the network until steady state; finishing the course within 100ms.
Description
Technical field
The present invention relates to the quick switching technique of Industrial Ethernet redundancy loop field, be meant the implementation method of the redundancy backup design of a kind of monocycle and tangent rings especially.
Background technology
The communication pattern of various fieldbus had been adopted in industry spot communication in the past; But because the communication protocol of each manufacturer has nothing in common with each other, the equipment of each manufacturer carries out interconnected the biggest problem that becomes industrial trade, up to the ethernet technology success of maturation is applied to industrial trade, the interconnected reality that just becomes of each vendor equipment; Yet ethernet technology is formed the technology that existing STP, the RSTP of redundant network employing switched in several seconds to tens seconds, can not satisfy the time demand of industry spot network reconstruct, the defective that the technology of developing a kind of fast-speed redundancy is improved Ethernet becomes needs the another one difficult problem that solves.
DT-ring fast-speed redundancy technology is improved on the technical foundation of the ieee802.1d of maturation and is formed, the message format of employing standard, the criterion of communicating by letter efficiently makes the speed of switching of network when forming looped network satisfy the demand of industry spot networking to internet security, reliability fully by the method for bringing up to this realization redundant looped network of 100ms. in original tens seconds.This is a kind of method of simple and efficient realization redundant looped network.
Summary of the invention:
In view of this, the invention provides a kind of fast replacing method of ethernet redundancy looped network.Technical scheme of the present invention is achieved in that in order to achieve the above object
1. the present invention adopts the mode that sets in advance main website, slave station, in a ring main website, a plurality of slave stations can only be set.
2. the present invention adopts the pattern that sets in advance the central port, and each switch can be provided with a multiple central port of 2, and two ports forming same ring are set in the same territory, and the DT-ring agreement has been stipulated 32 territories at most.All central ports of forming the master-salve station device of same ring must be in same territory, promptly territory ID number identical; Can form network topology structures such as monocycle, tangent rings so support the industrial switch of DT-ring agreement.
3. the present invention has adopted the standard message form of IEEE 802.1d on message format, comes looped network is controlled.
4. when adopting industrial switch of the present invention to form redundant looped network, by the topology change of master station device maintaining network; Two central port ports of acquiescence of master station device are in the Forward state, a port is in the Block state; Be in the port of Forward state, can transmitting and receiving service message and TEST message, the port that is in the Block state receives only the TEST message.Master station device sent a TEST message every 1 second, when looped network just often, the port that is in the Block state can received a TEST message at interval 1 second.This moment, the loop network with physics disconnected in master node place logic, made service message not form ring in network, cleared up the generation except that network storm.
5. adopt device of the present invention, the state of the cpu of each device central port of poll in 10ms; Communication media between the node in the loop network breaks, as Fig. 2, two device ring ports of slave station A, B change, the central port converts LINK-Down to by LINK-UP, slave station A, B are immediately with the Link_Down incident, be forwarded on the net from the another one central port, refresh the central port MAC Address simultaneously one time.And the port that is in LINK-Down is set to the BLOCK state.Other slave units receive the control message of Link Down, E-Packet earlier, refresh the central port mac address table one time.
6. after master station device is received the control message of Link Down, at first open be in originally the Block state from port, but do not block master port, the node of master station device in network sends the message of network topological change, and master station device refreshes the central port mac address table of oneself;
7. receive the message of the topology change that master station device sends from station arrangement in the network, refresh the MAC Address of slave station device ring port.
8. master station device can continue regularly to send the TEST message from master port.
9. after finding the loop link-recovery from station arrangement A, B in the territory, send the control message of Link Up at once to the central port that is in the Forward state; That faces mutually transmits after receiving the control message of Link Up immediately from station arrangement; After master station device received the control message of Link Up in the territory, the master and slave port to master station device sent topology changed messages simultaneously, and master station device is set to the Block state from port then, refreshes the mac address table of own central port simultaneously.
10. after receiving the message of topology change from station arrangement, open the central port that is in the Block state originally, make this port be in the Forward state, refresh the MAC Address of own central port simultaneously.
11. network recovery is to just making state, master station device return to the state that a central port is in Forward, a central port is in the Block state; All states that is in Forward from two central ports of station arrangement.
12. main equipment is received the TEST message in the territory, at blocking data message from port.Main equipment refreshes the mac address table of own central port, and sends mac address table renewal message, makes slave unit refresh the mac address table of its central port.
13. in addition, agreement can also provide timeout mechanism that slave unit loop integrality is detected.
14. adopt the present invention can form tangent looped network, network topology constitutes as Fig. 3.
Description of drawings
Fig. 1 monocycle state
Fig. 2 looped network off-state
Fig. 3 tangent rings topology
Fig. 4 main website state machine
Fig. 5 slave station state machine
Embodiment
For making the present invention clearer, above agreement can be divided into master and slave station state and describe respectively; Below respectively its state machine is described in detail.
The main website agreement
There is three state in main website, is respectively initial state, ring-open state and ring-off status; By protocol massages and our station central port State Control transferring protocol state.No matter be in which kind of state, main website all can send the TEST message to the main ring port, is used for the detection loop state.
Initial state: the state when the central port has only to be LINK-UP, do not need agreement that protocol massages is carried out any processing, a detection ring port LINK-UP incident is behind inferior central port LINK-UP, forward state to ring-off status, it is the BLOCK state that time central port is set simultaneously.
| ID | Event | CONDITION | ACTION | NEXT-STATE |
| 1 | Link-up | Has only a central port Link-up | NULL | Self |
| 2 | Link-up | Two central port Link-up are arranged | Current Link-up port is set to time central port; State is set to BLOCK | Ring-off status |
| 3 | Receive protocol massages; Type is Link-up | NULL | NULL | NULL |
Ring-off status: DT-RING ring connection status physically; Each port status on the ring all is the LINK-UP state, and this moment is Cheng Huan physically.
| ID | Event | CONDITION | ACTION | NEXT-STATE |
| 1 | Link-down | The main ring port | FDB table on the clear central port; It is forwarding state that time central port is set; Send protocol massages to inferior central port, type changes for opening up to mend; | Initial state |
| 2 | Link-down | Inferior central port | NULL | Initial state |
| 3 | Receive protocol massages, type is Link-down | NULL | Time central port forwarding state is set; Send protocol massages to the central port, type changes for opening up to mend. | Ring-Kai state |
| 4 | Receive protocol massages, type is Link-up | NULL | NULL | Ring-off status |
| 5 | The TEST message is overtime | NULL | Time central port forwarding state is set sends protocol massages, type changes for opening up to mend. | Ring-Kai state |
Ring-Kai state: DT-RING ring connection status physically; Port on the ring has at least one to be the LINK-DOWN state; Main ring can not receive the own TEST message that sends from the main ring port this moment.
| ID | Event | CONDITION | ACTION | NEXT-STATE |
| 1 | Receive the TEST message | NULL | The secondary ring port status is set to blocked state and sends protocol massages from inferior central port; Type changes for opening up to mend | Encircle-close state |
| 2 | Receive protocol massages; Type of message is | NULL | The secondary ring port status is set to blocked state | Encircle-close state |
| Link-up | Send protocol massages from inferior central port; Type changes for opening up to mend | |||
| 3 | Link-down | The main ring port | The secondary ring port status is set to forwarding state time central port and becomes main ring port transmission protocol massages automatically; Type of message changes for opening up to mend | Initial state |
| 4 | Link-down | Inferior central port | NULL | Initial state |
The slave station agreement
Slave station has three state, is respectively initial state, stands-forwarding state and station-blocked state; By protocol massages and our station central port State Control transferring protocol state.
Initial state:
State when the central port has only one to be LINK-UP does not need agreement that protocol massages is carried out any processing, a detection ring port LINK-UP/DOWN incident, and behind two central port LINK-UP, protocol status is leapt to station-blocked state.
| ID | Event | CONDITION | ACTION | NEXT-STATE |
| 1 | Link-up | Has only a central port Link-up | NULL | Initial state |
| 2 | Link-up | Two central port Link-up are arranged | This port block is set sends linkup protocol massages startup repeating timer | Stand-blocked state |
| 3 | Receive protocol massages-all | NULL | NULL | Initial state |
| 4 | Link-Down | NULL | Port Block is set | Initial state |
| 5 | Repeating timer is overtime | NULL | Clear mac address table | Initial state |
Stand-forwarding state:
Stable state after the slave station central port all is Link-up, port all is in stable state.
| ID | Event | CONDITION | ACTION | NEXT-STATE |
| 1 | Receive protocol massages, type of message is a test packet | NULL | The transmitted test message | Self |
| 2 | Receive protocol massages, type changes for opening up to mend | NULL | Transmit this message and remove central port FDB | Self |
| 3 | Port Link-down | NULL | Send protocol massages to the Link-up central port, type of message is that the clear FDB table of Link-down starts repeating timer | Initial state |
| 4 | Repeating timer is overtime | NULL | Clear FDB table |
Stand-blocked state:
This is an interim state, when slave station is in initial state, is checked through port Link-up incident, after this port is set is BLOCK, wait for that main website is with the secondary ring port shutdown after, forward state to station-forwarding state.
| ID | Event | CONDITION | ACTION | NEXT-STATE |
| 1 | Receive protocol massages, type changes for opening up to mend | NULL | Port is set transmits clear central port FDB | Stand-forwarding state |
| 2 | Repeating timer is overtime | NULL | Port is set transmits clear central port FDB | Stand-forwarding state |
| 3 | Port Link-down | NULL | Send protocol massages to the Link-up central port, type of message is Link-down | Initial state |
Claims (4)
- Ethernet under the industrial environment fast, reliable redundant looped network switch method for designing, it is characterized in that specifying main website in the looped network/from station arrangement; Two central port ports of acquiescence of master station device are in the Forward state, a port is in the Block state; Be in the state of Forward from two central ports of station arrangement; Master station device sends the TEST message by the Forward status port, and the port of Block state detects the TEST message; The state of the cpu of each device central port of poll in 10ms; Communication media between the device in the loop network breaks, two the device ring ports on medium both sides of breaking change, the central port converts LINK-DOWN to by LINK-UP, break two devices on medium both sides immediately with the LINK-DOWN incident, be forwarded on the net from the another one central port, refresh the central port MAC Address simultaneously one time; Master station device is received from the central port and is received the incident that neighboring devices is transmitted, and at first opens the central port that is in the Block state, makes this port be in the Forward state, and the message of delivery network topology change, master station device refresh the central port mac address table of oneself; Refresh MAC Address receive the message of the topology change that master station device sends from station arrangement after; Whole topology change reaches the stable state time less than 100ms to reconstituting.
- 2. method according to claim 1, it is characterized in that, two central ports of master station device are configured to Forward state, Block state respectively, central port by the Forward state sends the TEST message, send once 1 second, central port by the Block state receives the TEST message, and the central port of Block state receives only the TEST message, does not receive other messages.
- 3. method according to claim 1 is characterized in that, under stable state, all two central ports from station arrangement all are in the Forward state.
- 4. method according to claim 1, it is characterized in that, all from station arrangement all at the LINK-UP, the state of LINK-DOWN of two central ports of monitoring, when LINK-UP, the generation of LINK-DOWN incident are arranged in the network, the device that the incident that monitors takes place is transmitted event earlier, refreshes the MAC Address of this device then; When adjacent other receives the incident of forwarding from station arrangement by the central port, same first forwarding incident refreshes the MAC Address of this device then.
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| CNB2007100030416A CN100469036C (en) | 2007-02-01 | 2007-02-01 | An implementation method for industrial Ethernet fast-speed redundancy |
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| CNB2007100030416A CN100469036C (en) | 2007-02-01 | 2007-02-01 | An implementation method for industrial Ethernet fast-speed redundancy |
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| CN100469036C true CN100469036C (en) | 2009-03-11 |
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