CN101094190B - Method for transmitting protective controlled message in Ethernet ring net - Google Patents
Method for transmitting protective controlled message in Ethernet ring net Download PDFInfo
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- CN101094190B CN101094190B CN2007101420467A CN200710142046A CN101094190B CN 101094190 B CN101094190 B CN 101094190B CN 2007101420467 A CN2007101420467 A CN 2007101420467A CN 200710142046 A CN200710142046 A CN 200710142046A CN 101094190 B CN101094190 B CN 101094190B
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Abstract
The method comprises: the node detects the status of the links corresponding to ports on the ring; if the node detects a failure happening in the neighbor circuit on the ring, it sets the port corresponding to said failure link as 'disabling the forwarding of ring network control message' in order to disable port corresponding to the failure link to make the forwarding of Ethernet ring network protection control message; if the node detects the failure in the neighbor link on ring is recovered, then the port corresponding to said recovered link will be set as 'enabling status'.
Description
Technical field
The present invention relates to the communications field, relate more specifically to a kind of transmission method of Ethernet ring protection control message.
Background technology
Ethernet ring protection system among the RFC3619 is linked to each other by a plurality of nodes and constitutes ring, can define a plurality of territories on the ring, i.e. the Ethernet ring protection territory.Comprise a host node and several transmission nodes in the territory, and one group of protected professional VLAN (Virtual Local Area Network is called for short VLAN) that is used for the user data forwarding.Wherein, two ports of host node on ring are respectively master port and from port, and protected service VLAN is the protection service VLAN.When the ring uplink was intact, host node blocked the protection service VLAN forwarding capability from port, and loop free produces in the network, had prevented because " broadcast storm " that network loop causes; When link occurs fault, host node is decontroled the protection service VLAN forwarding capability from port, and user data can be the passing through from port of host node, thereby ensured professional connection.Ethernet ring protection control message is communication between the node and a control message in the territory, and when the node port blocked, message is unaffected still can pass through in ethernet ring network control.
Fig. 1 is the topological diagram of ethernet ring network automatic protective system; form by node S1, S2, S3 and S4; disposed an Ethernet ring protection territory on the ring that these four nodes are formed, the host node in the territory (MASTER) is S2, and all the other node S1, S3, S4 are transmission node (TRANSIT).Two of host node S2 ring upper port are respectively master ports and from port, and its middle port 2 is master port (P), and port one is from port (S).In addition, also defined the protection service VLAN in the territory, each port all is configured in the protection service VLAN on the ring.When the ring uplink was intact, host node S2 blocked the protection service VLAN data forwarding function from port one, thereby had prevented to exist in the network loop to form " network storm "; When the ring uplink broke down, host node S2 had decontroled the protection service VLAN data forwarding function from port one, makes that the data in the service VLAN are communicated with again.
Host node cycle ground sends link health detection message (HELLO) to master port, when ring uplink when intact, the HELLO message passes through each transmission node successively, arrive host node from port, the HELLO message can by host node block from port, received by host node.If host node can not receive the HELLO message in official hour, just think that the ring uplink breaks down.
When transmission node detects adjacent link occurs fault, send link failure warning message (LINK-DOWN), the LINK-DOWN message arrives host node through the transmission of ring uplink, if host node slave port is in blocked state, the LINK-DOWN message also passes host node slave port, gives host node.Host node thinks that at master port or when port is received the LINK-DOWN message fault has taken place the ring uplink.
When host node detects the ring uplink when breaking down; relieving is from the protection service VLAN forwarding capability of port; upgrade the mac address table of ring upper port; and transmission linkdown notification message (FLUSH-DOWN) notice is encircled upward, and other nodes carry out the link failure switching; after transmission node is received FLUSH-DOWN; upgrade ring upper port mac address table, the data in the protection service VLAN begin to transmit by new path.
When node detection arrives adjacent link occurs fault, block the protection service VLAN forwarding capability of corresponding port; When fault disappears, temporarily do not decontrol the protection service VLAN forwarding capability of port.During link failure, host node still outwards sends the HELLO message from master port, if link failure disappears, the HELLO message can pass the port of obstruction and the link that fault disappears.When receiving the HELLO message from port; just think that encircling uplink recovers; again block protection service VLAN forwarding capability from port; upgrade ring upper port mac address table; go up transmission linkup notification message (FLUSH-UP) to ring; the notice ring is gone up other nodes and is carried out the link-recovery switching; after transmission node is received FLUSH-UP; upgrade ring upper port mac address table; the transmission node that detects the link failure disappearance is also decontroled the protection service VLAN forwarding capability of corresponding port, and the data in the protection service VLAN begin to transmit by new path.
The protection service VLAN function of ring upper port is blocked or is decontroled not influence of transmission for Ethernet ring protection control message, so Ethernet ring protection control message can pass the port blocked node that achieves the goal, and finishes the control communication between the node.
Link failure situation more complicated in the reality, common one section chain route transmitting-receiving two parts constitute, and when having only a receiving portions or a part to break down, single-pass can appear in link.As shown in Figure 2, the link single-channel fault takes place between node S3 and the S4, node S3 can not receive the information of node S4, but node S4 can receive the information of node S3.Node S3 detects link failure, blocks the corresponding port 2 of faulty link, sends the LINK-DOWN message to host node, and host node is received the laggard line link failover of LINK-DOWN message.During link failure, host node still sends the HELLO message from master port to ring, and the HELLO message can pass the port 2 of node S3, through the link between node S3 and the S4, then through node S4 arrival host node from port.Host node is being received the HELLO message from port, think and carry out link-recovery link-recovery and switch, and blocks the protection service VLAN forwarding capability from port again, makes that the data in the protection service VLAN can not be transmitted by host node slave port.Yet the link between node S3 and the S4 is a single-pass, and unidirectional obstructed fault takes place the data communication meeting in the protection service VLAN, just can not be transferred to node S1 as the data in the protection service VLAN of node S4.
For some link failure detection methods, when the running software of going up node when certain ring broke down, adjacent node also can be thought link occurs fault.As shown in Figure 3, by detecting link failure, when node can not receive the probe messages that the opposite end sends in official hour, think link occurs fault between node S3 and the node S4 to sending out a probe messages.The hardware of node S3 can normally be transmitted data, but when software breaks down, can't send probe messages at the appointed time to node S4, node S4 with regard to think and S3 between link fault has taken place.After node S4 detects link failure, block the corresponding port of faulty link, send the LINK-DOWN message to host node.After host node is received the LINK-DOWN message, think link occurs fault, carry out link failure and switch.During link failure, host node still sends the HELLO message from master port to ring, and the HELLO message can be forwarded to port 2 by node S3 hardware, through the link between node S3 and the S4, then through node S4 arrival host node from port.Host node is being received the HELLO message from port, think and carry out link-recovery link-recovery and switch, and blocks the protection service VLAN forwarding capability from port again, makes that the data in the protection service VLAN can not be transmitted by host node slave port.Yet the link between detected S3 of node S4 and the S4 still is a malfunction, and host node thinks that whole loop network link state but for intact, has produced false judgment, and follow-up operation all may produce fault.After looped network recovers to switch, need the data transmitted by software can't proper communication between the node, interrupt as producing by the communication data that node S3 software is transmitted between node S1 and the S4.In addition, when the communication of link between node S3 and the node S4 is all interrupted, because it is malfunction that node S4 has write down Link State, just can not send the LINK-DOWN message again notifies link failure to host node, host node can only rely on that the HELLO message is overtime judges the detection link failure, postpone link failure and switched the required time, can't satisfy the demand of high real-time business.
As patent EP1727313, also there is similar problem in other Ethernet ring protection methods.
Summary of the invention
One or more problems in view of the above the invention provides the transmission method that a kind of new Ethernet ring protection is controlled message.
Transmission method according to Ethernet ring protection control message of the present invention may further comprise the steps: node detection ring upper port link corresponding state; If node detection goes up adjacent link to ring and breaks down; then the corresponding port of faulty link is set at the forwarding of looped network control message and forbids attitude; so that the corresponding port of faulty link can not be transmitted Ethernet ring protection control message; if going up the adjacent link fault to ring, node detection disappears; the corresponding port of the link that then fault disappeared is set at looped network control message and transmits the permission attitude, to transmit Ethernet ring protection control message by the corresponding port of fault disappearance link.
Wherein, break down, then also need to block the professional VLAN forwarding capability of protection of the corresponding port of faulty link if node detection goes up adjacent link to ring.Node is not transmitted the destination interface transmission of forbidding attitude or is transmitted Ethernet ring protection control message to being in looped network control message.When being in looped network control message and transmitting the destination interface of forbidding attitude and receive Ethernet ring protection control message, Ethernet ring protection is controlled message give up.
Wherein, node is only transmitted the destination interface transmission that allows attitude or is transmitted Ethernet ring protection control message to being in looped network control message.When the destination interface that is in looped network control message permission attitude receives Ethernet ring protection control message, described Ethernet ring protection control message is sent or transmits.
By the present invention, can avoid in the ethernet ring network control message can transmit by detecting the link of fault, thereby can prevent the looped network protection handoff error, improve the fault-resistant ability of ethernet ring network in actual networking.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the topological diagram of ethernet ring network automatic protective system;
Fig. 2 is the topological diagram that the link single-channel fault appears in Ethernet ring protection system;
Fig. 3 is the topological diagram that the node software fault appears in Ethernet ring protection system;
Fig. 4 is the flow chart that port looped network control message forwarding attitude is set according to the ethernet ring network node of the embodiment of the invention;
Fig. 5 is the flow chart when controlling message transmission or forwarding according to the looped network of the embodiment of the invention; And
Fig. 6 is the flow chart when controlling the message reception according to the looped network of the embodiment of the invention.
Embodiment
In the present invention, the functional definition of the node cycle upper port being transmitted ethernet ring network control message is that looped network control message is transmitted and allowed attitude and looped network control message to transmit to forbid attitude.When port is that looped network control message is transmitted when allowing attitude, ethernet ring network control message can pass through this port, and when port is that looped network control message is transmitted when forbidding attitude, ethernet ring network is controlled message can not pass through this port.The ethernet ring network control message forwarding state of port only has effect to ethernet ring network control message, to the not influence of user data message.When ring is gone up node detection to link occurs fault, corresponding port is set to the forwarding of looped network control message and forbids attitude, to prevent that ethernet ring network control message is by this port, when ring is gone up node detection to link-recovery, corresponding port is set to looped network control message and transmits the permission attitude, so that ethernet ring network control message is by this port.Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
With reference to figure 4, illustrate that the ethernet ring network node according to the embodiment of the invention is provided with the flow process that port looped network control message is transmitted attitude.As shown in Figure 4, this ethernet ring network node is provided with port looped network control message and transmits the process of attitude and may further comprise the steps: S402, the Link State of node detection ring upper port in the Ethernet ring protection territory; S404, when node detection breaks down to adjacent link, carry out looped network protection and handle (the protection service VLAN forwarding capability that for example blocks the corresponding port of this faulty link, notice host node link occurs fault), and the corresponding port of faulty link is set at looped network control message transmits and forbid attitude; S406 when node detection disappears to the adjacent link fault, is set at the fault link corresponding port that disappears looped network control message and transmits and allow attitude.
With reference to figure 5, the flow process when sending or transmitting according to the looped network of embodiment of the invention control message is described.As shown in Figure 5, the process when this looped network control message sends or transmits may further comprise the steps: S502, and node need send looped network control message to the ring upper port; S504, attitude is forbidden in forwarding if destination interface is looped network control message, and message is sent; S506, message is transmitted the permission attitude if destination interface is looped network control, and then message can send.
With reference to figure 6, the flow process when receiving according to the looped network of embodiment of the invention control message is described.As shown in Figure 6, the process when this looped network control message receives may further comprise the steps: S602, and ethernet ring network control message arrives node port; S604, attitude is forbidden in forwarding if this node port is looped network control message, then with packet loss; S606, message is transmitted the permission attitude if this node port is looped network control, and then message can pass through this port.
By the description of Fig. 4 to Fig. 6 as can be seen, the transmission method according to the Ethernet ring protection control message of the embodiment of the invention may further comprise the steps: node detection ring upper port link corresponding state; If node detection goes up adjacent link to ring and breaks down; then the corresponding port of faulty link is set at the forwarding of looped network control message and forbids attitude; so that the corresponding port of faulty link can not be transmitted Ethernet ring protection control message; if going up the adjacent link fault to ring, node detection disappears; the corresponding port of the link that then fault disappeared is set at looped network control message and transmits the permission attitude, to transmit Ethernet ring protection control message by the corresponding port of fault disappearance link.Between the loop network link age at failure; the link health detection message that host node sends can not be by detecting the link that fault takes place; after fault disappears; the link health detection message that host node sends can be by detecting the link that fault disappears; thereby prevented from still can transmit host node that ethernet ring network control message causes false judgment, improved the fault-resistant ability of Ring protection system the looped network state owing to detect the link of fault.
Below the transmission of having used the Ethernet ring protection control message in certain Ethernet ring protection system of the present invention is described.
For example, supposing has 5 transmission nodes and 1 host node on the ring, and the link between the adjacent node disconnects the simple optical fiber between certain two node for two optical fiber of transmitting-receiving, makes that link is a single-pass.In not using Ethernet ring protection system of the present invention, after host node detects looped network generation link failure, still can receive from port by the link of single-pass to the HELLO message that master port sends, think that loop network link recovers, carry out the link-recovery handover blocking from port, cause protecting the data of service VLAN can only single-pass; After Ethernet ring protection system is used the present invention; during the link unidirectional fault; the node that detects link failure is set at the forwarding of looped network control message with corresponding port and forbids attitude; the HELLO message that host node sends can't be by detecting the port of link failure; also the HELLO message can't received from port, so can not produce false judgment to the looped network state.
In addition, supposing has 5 transmission nodes and 1 host node on ring, adopts between the adjacent node mode of sending out probe messages is carried out link failure detection, when node can not receive the probe messages that the opposite end sends in official hour, just thinks link occurs fault.Certain transmission node CPU (Central Processing Unit is called for short CPU) is resetted, and when cpu reset began, hardware still can be transmitted data, but software can't move, and after a period of time, hardware stops forwarding data at cpu reset.The peer node of this reset node detects less than detection packet in official hour, thinks link occurs fault.In not using Ethernet ring protection system of the present invention; after host node detects looped network generation link failure; still can receive from port by the hardware forwarding of reset node to the HELLO message that master port sends; think that loop network link recovers; carry out the link-recovery handover blocking from port; produced false judgment to the looped network state; the node hardware of CPU of resetting this moment stops forwarding data; it is fault case that but adjacent node has write down Link State; can not reinform the host node link failure; therefore host node detects and breaks down less than loop network link, still is in blocked state from port, causes protecting the user data in the service VLAN obstructed.After Ethernet ring protection system is used the present invention; when node detection arrives link failure; with the ports-settings of corresponding faulty link is that attitude is forbidden in the forwarding of looped network control message; the HELLO message that host node sends can't be by detecting the port of link failure; also can't receive the HELLO message from port, can not produce false judgment the looped network state.
In sum; the present invention is by classifying to the mode of node port transmission Ethernet ring protection control message; when detecting link occurs fault; forbid that Ethernet ring protection control message is by the corresponding port of faulty link; prevent the looped network status error judgement under the complicated link failure condition, improved the reliability and stability of system.In addition, the present invention can be used in the multiple Ethernet ring protection technology.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (6)
1. the transmission method of an Ethernet ring protection control message is characterized in that, may further comprise the steps:
Node detection ring upper port link corresponding state;
If described node detection goes up adjacent link to ring and breaks down; then the corresponding port of faulty link is set at the forwarding of looped network control message and forbids attitude; so that the corresponding port of described faulty link can not be transmitted Ethernet ring protection control message; if going up the adjacent link fault to ring, described node detection disappears; the corresponding port of the link that then fault disappeared is set at looped network control message and transmits the permission attitude, to transmit described Ethernet ring protection control message by the corresponding port of described fault disappearance link.
2. the transmission method of Ethernet ring protection control message according to claim 1; it is characterized in that; if described node detection goes up adjacent link to ring and breaks down, then described node also needs to block the professional VLAN forwarding capability of protection of the corresponding port of described faulty link.
3. the transmission method of Ethernet ring protection control message according to claim 1 and 2 is characterized in that, described node is not transmitted the destination interface transmission of forbidding attitude or transmitted described Ethernet ring protection control message to being in looped network control message.
4. the transmission method of Ethernet ring protection control message according to claim 1 and 2; it is characterized in that; when being in looped network control message and transmitting the destination interface of forbidding attitude and receive described Ethernet ring protection control message, described Ethernet ring protection control message is given up.
5. the transmission method of Ethernet ring protection control message according to claim 1 and 2 is characterized in that, described node only allows the destination interface of attitude to send or transmit described Ethernet ring protection control message to being in the forwarding of looped network control message.
6. the transmission method of Ethernet ring protection control message according to claim 1 and 2; it is characterized in that; when being in destination interface that looped network control message allows attitude and receiving described Ethernet ring protection control message, described Ethernet ring protection control message is sent or transmits.
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| CN2007101420467A CN101094190B (en) | 2007-08-20 | 2007-08-20 | Method for transmitting protective controlled message in Ethernet ring net |
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| CN2007101420467A CN101094190B (en) | 2007-08-20 | 2007-08-20 | Method for transmitting protective controlled message in Ethernet ring net |
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| CN101094190B true CN101094190B (en) | 2010-12-08 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101330404A (en) * | 2008-06-20 | 2008-12-24 | 华为技术有限公司 | Method, system and equipment for managing network appliance port state |
| CN101662421B (en) * | 2008-08-28 | 2012-09-05 | 中兴通讯股份有限公司 | Method and device for transmitting control message based on ethernet multi-ring network |
| CN101465782B (en) * | 2009-01-12 | 2011-01-05 | 杭州华三通信技术有限公司 | Method for switching optimizing link of RRPP loop, system and network node |
| CN101815029B (en) * | 2009-02-19 | 2014-09-10 | 中兴通讯股份有限公司 | Address refreshing method of sub-loop virtual channel |
| CN102694710B (en) * | 2012-05-25 | 2014-12-31 | 浙江宇视科技有限公司 | Ring network service protection method and device |
| CN103166868B (en) * | 2013-03-04 | 2015-09-16 | 杭州华三通信技术有限公司 | For the method and apparatus that anti-neighbours are shaken |
| CN106559820B (en) * | 2015-09-24 | 2019-08-16 | 电信科学技术研究院 | A kind of link monitoring method and device |
| CN109617828A (en) * | 2019-01-22 | 2019-04-12 | 新华三技术有限公司 | A kind of data forwarding method and device |
| CN114500161A (en) * | 2022-02-27 | 2022-05-13 | 重庆长安汽车股份有限公司 | Redundant link switching method based on vehicle-mounted Ethernet ring network and readable storage medium |
| CN114844774B (en) * | 2022-04-24 | 2023-07-14 | 重庆长安汽车股份有限公司 | Redundant communication system, method and storage medium of vehicle-mounted Ethernet ring |
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|---|---|---|---|---|
| US6766482B1 (en) * | 2001-10-31 | 2004-07-20 | Extreme Networks | Ethernet automatic protection switching |
| CN1747439A (en) * | 2005-10-14 | 2006-03-15 | 杭州华为三康技术有限公司 | Fault treating method for phase switching loop of automatic protection system of Ethernet |
| CN1812300A (en) * | 2005-01-28 | 2006-08-02 | 武汉烽火网络有限责任公司 | Loop network connection control method, route exchanging equipment and loop network system |
| EP1727313A1 (en) * | 2005-05-25 | 2006-11-29 | Siemens Aktiengesellschaft | Ring network and method for automatic protection switching |
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2007
- 2007-08-20 CN CN2007101420467A patent/CN101094190B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6766482B1 (en) * | 2001-10-31 | 2004-07-20 | Extreme Networks | Ethernet automatic protection switching |
| CN1812300A (en) * | 2005-01-28 | 2006-08-02 | 武汉烽火网络有限责任公司 | Loop network connection control method, route exchanging equipment and loop network system |
| EP1727313A1 (en) * | 2005-05-25 | 2006-11-29 | Siemens Aktiengesellschaft | Ring network and method for automatic protection switching |
| CN1747439A (en) * | 2005-10-14 | 2006-03-15 | 杭州华为三康技术有限公司 | Fault treating method for phase switching loop of automatic protection system of Ethernet |
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