CN102487348A - Method and system for realizing looped network uplink protection - Google Patents
Method and system for realizing looped network uplink protection Download PDFInfo
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- CN102487348A CN102487348A CN2010105699283A CN201010569928A CN102487348A CN 102487348 A CN102487348 A CN 102487348A CN 2010105699283 A CN2010105699283 A CN 2010105699283A CN 201010569928 A CN201010569928 A CN 201010569928A CN 102487348 A CN102487348 A CN 102487348A
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- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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Abstract
The invention discloses a method and a system for realizing looped network uplink protection. The method comprises the step of selecting a transmission node as a spare node from an Ethernet automatic protection switching (EAPS) looped network, and comprises the following specific substeps of: when the spare node detect that a main uplink connected with a main node has a fault, starting a spare uplink connected with the spare node, and sending a forward list to the other nodes in the EAPS looped network to update messages, wherein the identification information that the spare node starts the spare uplink is added in a retention field of the message. Redundancy protection on the uplink is realized by modifying the retention field of an EAPS protocol and sending the message containing uplink control and management information.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of implementation method and system of looped network up link protection.
Background technology
EAPS (Ethernet Automatic Protection Switching, Ethernet Automatic Protection Switching) is the Ethernet ring protection switching technology that is proposed by Extreme Networks company, and is turned to RFC3619 in 2003 by ietf standard.The EAPS technology can use lower one-tenth to set up the elasticity metropolitan area network (MAN) and the local area network (LAN) (LAN) of high reliability originally.
EAPS major technique characteristics comprise: less than 1 second failure recovery time, in 50 milliseconds, the fault that is similar to sonet ring fast restoration capabilities can be provided usually; Each segmented node in the looped network can standalone upgrade, does not require that the interface rate of each node in the looped network must be consistent; Physical rings and domain logic can be separate; The quick stationkeeping ability of the fault network segment or node; Support OSPF (Open Shortest Path First, ospf), BGP IP routing protocols such as (Border Gateway Protocol, Border Gateway Protocols).
The EAPS looped network comprises a host node (Master Node) and several transmission nodes (Transit Node) and corresponding with it control VLAN and protected VLAN.EAPS looped network state is divided into two kinds: complete Complete state and imperfect Failed state.Each EAPS node has two ports, is respectively master port (Primary Port) and from port (Secondary Port).The EAPS agreement has three timers: host node sends interval, host node detection inefficacy duration (fail-period) and the transmission node prerotation of hello (health detection) message and sends out duration (pre-forward).
As shown in Figure 1, a typical EAPS looped network just is equal to the topology of a physical rings.Under the Complete state, host node is inaccessible from port S from logic, does not allow to transmit message from port, guarantees looped network chain rupture in logic, has avoided traffic loops.The EAPS looped network protection is through alarm mechanism, polling mechanism and looped network Switchover mechanism, and detection looped network connectedness is also protected fast.
Alarm mechanism: when transmission node detects the link occurs fault that principal and subordinate's port links to each other, must send " link down " message to host node.Host node is received this message; Judge that the looped network state becomes Failed from Complete, host node is opened from port, refreshes transmitting of oneself; And through principal and subordinate's port send " flush " message, the notification transmission node is switched (refresh and transmit, relearn MAC Address).
Polling mechanism: host node periodically sends looped network health detection message (hello message) through control VLAN by master port.Under the Complete state, health detection message is through the forwarding of each transmission node, arrive host node from port.If before detecting (fail-period) timer expiry that lost efficacy; Do not receive hello message from port S; Host node thinks that looped network breaks down, and opens from port, refreshes transmitting of oneself; And through principal and subordinate's port send " flush " message, the notification transmission node is switched (refresh and transmit, relearn MAC Address).
Restoration Mechanism: host node is received the hello detect-message at port S, judges that then the looped network recovering state is normal.If looped network originally was in imperfect Failed state, host node will be switched.The host node obturation refreshes transmitting of oneself from port, and switches (refresh and transmit, relearn MAC Address) to all transmission nodes transmission " flush " message, notification transmission node.
At present, the EAPS agreement can realize looped network protection, yet does not relate to the up link protection of looped network in the looped network protection.The node that perhaps links to each other with up link breaks down if the up link of looped network breaks down, and all can cause the up chain rupture of whole looped network, causes service disconnection.
Summary of the invention
The present invention provides a kind of implementation method and system of looped network up link protection, in order to solve prior art the problem of looped network up link protection can not be provided.
The present invention provides a kind of implementation method of looped network up link protection, and this method selected transmission node in Ethernet Automatic Protection Switching EAPS looped network is a secondary node, specifically comprises:
Said secondary node detects leading when using uplink failure of host node connection; Open the subsequent use up link that said secondary node connects; And updating message is transmitted in other nodes transmissions in the EAPS looped network, is added with the identification information that secondary node is starting subsequent use up link in the reserved field of this message.
Wherein, the main mode with uplink failure of said secondary node detection host node connection comprises:
Said secondary node receives the EAPS message that host node sends; When in detecting this EAPS message, carrying the uplink failure sign; Judge that the master that host node connects uses uplink failure, wherein, the uplink failure identification information that carries is added in the reserved field of EAPS message; Perhaps,
When said secondary node does not receive any message of host node transmission in the setting-up time section, judge that the master that host node connects uses uplink failure.
Wherein, the said setting-up time section detection failure duration that is twice.
Further, under the state of subsequent use up link work, said method also comprises:
When said secondary node receives the EAPS message of host node transmission; Judge main normal with the up link recovery; Inaccessible said subsequent use up link; And updating message is transmitted in other nodes transmissions in the EAPS looped network, is added with the sign that secondary node is being closed subsequent use up link in the reserved field of this message.
Further, said host node detects the EAPS message that secondary node is being closed subsequent use up link sign that carries of in the timing section, whether receiving the secondary node transmission, if then refresh the master and slave port of self and transmit; Otherwise host node other nodes in the EAPS looped network send transmits updating message.
Wherein, said timing section is to send the transmission duration of three health detection message continuously.
The present invention also provides a kind of realization system of looped network up link protection, comprises an EAPS ring network host node and a plurality of EAPS looped network transmission node, it is characterized in that, selected transmission node is a secondary node in said EAPS looped network transmission node;
Said secondary node comprises:
The message detection unit is used to detect the master that is connected with host node with up link fault whether, if open the subsequent use up link that said secondary node connects;
Message issues the unit, is used for detecting in said message detection unit main when use uplink failure, and updating message is transmitted in other nodes transmissions in the EAPS looped network, is added with the sign that secondary node is starting subsequent use up link in the reserved field of this message.
Wherein, said message detection unit comprises:
The first message detection subelement is used to detect whether do not receive any message that host node sends in the setting-up time section, if, judge that the master uses uplink failure, trigger subsequent use up link and open subelement;
The second message detection subelement is used for the EAPS message that host node sends is detected, and when in detecting this EAPS message, carrying the uplink failure sign, judges that the master uses uplink failure, triggers subsequent use up link and opens subelement; Wherein, the uplink failure identification information that carries is added in the reserved field of EAPS message;
Subsequent use up link is opened subelement, is used to open the subsequent use up link that said secondary node connects.
Further, said message detection unit also comprises: the 3rd message detection subelement;
Said the 3rd message detection subelement is used under the state of subsequent use up link work, detects whether to receive the EAPS message that host node sends, if judge that the master recovers normal with up link, inaccessible said subsequent use up link;
Further; Said message issues the unit; Also being used for detecting the master at said the 3rd message detection subelement recovers just often with up link; Other nodes send and transmit updating message in the EAPS looped network, are added with the sign that secondary node is being closed subsequent use up link in the reserved field of this message.
Further, said host node also is used to detect and whether receives that in the timing section said message issues the secondary node that carries that sends the unit and closing the EAPS message that subsequent use up link identifies, if then refresh the master and slave port of self and transmit; Otherwise other nodes send and transmit updating message in the EAPS looped network.
Compared with prior art, beneficial effect of the present invention is following:
The subsequent use up link that the method for the invention is set a secondary node and is connected with secondary node; Reserved field through expansion EAPS agreement; Carry out the transmission of up link control and management information through the EAPS message of expansion between secondary node and host node, realized redundancy protecting, and need not increase other agreements newly up link; Not only can guarantee the switch speed of up link, and not influence common transmission node, less the change of whole looped network.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is EAPS ring network structure figure in the prior art;
Fig. 2 is the implementation method flow chart of a kind of looped network up link protection provided by the invention;
The ring network structure figure that Fig. 3 uses for the method for the invention;
Fig. 4 is the structure chart of EAPS message frame among the present invention;
The host node that Fig. 5 provides for the embodiment of the invention is realized looped network up link guard method flow chart;
The secondary node that Fig. 6 provides for the embodiment of the invention is realized looped network up link guard method flow chart;
Fig. 7 is the realization system construction drawing of a kind of looped network up link protection provided by the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
In order to solve prior art the problem of looped network up link protection can not be provided, the present invention provides a kind of implementation method and system of looped network up link protection.
Concrete, the present invention provides a kind of implementation method of looped network up link protection, and in this method, a selected transmission node is a secondary node in the EAPS looped network; As shown in Figure 2, said method comprises:
Step S201, secondary node detect the main uplink failure of using that host node connects;
In this step; The mode of secondary node detection failure comprises: secondary node receives the EAPS message that host node sends; When in detecting this EAPS message, carrying the uplink failure sign; Judge that the master that host node connects uses uplink failure, wherein, the uplink failure identification information that carries is added in the reserved field of EAPS message; Perhaps,
When secondary node does not receive any message of host node transmission in the setting-up time section, judge that the master that host node connects uses uplink failure.
Wherein, the setting-up time section is the detection failure duration of twice.
Step S202, secondary node are opened the subsequent use up link that is connected with secondary node;
Step S203, secondary node other nodes in the EAPS looped network send transmits updating message, subsequent use up link operate as normal.
Wherein, transmit in the reserved field of updating message and be added with the identification information that secondary node is starting subsequent use up link.
Further; When secondary node receives the EAPS message of host node transmission; Judge main normal with the up link recovery; Inaccessible said subsequent use up link, and updating message is transmitted in other nodes transmissions in the EAPS looped network, is added with the sign that secondary node is being closed subsequent use up link in the reserved field of this message.
Host node then detects the EAPS message that secondary node is being closed subsequent use up link sign that carries of in the timing section, whether receiving the secondary node transmission, if then refresh the master and slave port of self and transmit; Otherwise said host node other nodes in the EAPS looped network send transmits updating message.
Wherein, the timing section is to send the transmission duration of three health detection message continuously.
Provide the several preferred embodiments of the present invention according to Fig. 3～Fig. 6 below, and combine description, further provide ins and outs of the present invention, make it that concrete implementation procedure of the method for the invention can be described better embodiment.
The embodiment of the invention provides a kind of implementation method of looped network up link protection, and this method mainly comprises when the master breaks down with up link, starts the processing method of subsequent use up link; Further, when the master recovered with up link, this method also comprised fault recovery processing method;
The ring network structure figure that the method for the invention is used is as shown in Figure 3, and wherein, host node links to each other with up link with main; In transmission node, setting one is secondary node, and this secondary node links to each other with subsequent use up link.When the master breaks down with up link; Secondary node sends specific EAPS message through host node or the main up fault of using is known in secondary node self detection; Start subsequent use up link, and send specific EAPS message (that is flush message) to other looped network nodes.
Wherein, The extended message that mutual specific EAPS message is EAPS message in the EAPS agreement between secondary node and host node is passed through the modification to EAPS agreement reserved field among the present invention, the transmission of management information when realizing uplink failure; And need not increase other agreements newly; This method not only can guarantee the switch speed of up link, and does not influence common transmission node, less to the change of whole looped network.The form of EAPS message frame is as shown in Figure 4 in the EAPS agreement, and said reserved field is the STATE field, and its initial value is 0x00.When concrete the application, the different different active and standby uplink link status of value representative, concrete definition mode can for:
The EAPS message that the 0x00 host node sends (hello/flush message), expression is main normal with up link;
The EAPS message that the 0x01 host node sends (hello/flush message), expression is main unusual with up link;
The EAPS message that the 0x02 secondary node sends (flush message), expression secondary node have known that the master uses uplink failure, is carrying out subsequent use up link and is launching operation
The EAPS message that the 0x03 secondary node sends (flush message), expression secondary node have been known main normal with the up link recovery, are carrying out subsequent use up link shutoff operation.
Further, recover just often with up link when main, said method is also carried out the fault recovery processing, is specially: host node transmission EAPS extended message (carrying the 0x00 sign) notice secondary node master is normal with up link; After secondary node was received message, inaccessible subsequent use up link refreshed transmitting of master and slave port, and sent flush message (carrying the 0x03 sign) to other looped network nodes and notify other node updates to transmit; If host node is not received the flush message that secondary node sends in predefined duration, host node sends other looped network nodes renewals of flush message informing voluntarily by principal and subordinate's port and transmits.
For the implementation procedure of clearer elaboration the method for the invention, be executive agent with host node and secondary node respectively below, explain main during with the up link fault generating when leading with the up link fault recovery, the operating process of host node and secondary node.
Embodiment one
As shown in Figure 5, present embodiment is the implementation method that executive agent is set forth the up link protection with the host node, may further comprise the steps:
Step S501, the main up link operate as normal of using, reserved field is initial value 0x00 in the EAPS message that host node sends (hello/flush message);
Step S502, host node detect the master and use uplink failure, and the reserved word segment value that the EAPS message of after this sending (hello/flush message) is carried is 0x01, and expression is main unusual with up link;
Step S503, host node detect the flush message that carries the 0x02 sign of whether receiving that secondary node sends, if, execution in step S505; Otherwise, execution in step S5054;
Step S504, subsequent use up link are temporarily unavailable;
Step S505, host node refresh transmitting of principal and subordinate's port;
Step S506, when main recover with up link normal after, reserved field is initial value 0x00 in the EAPS message that host node sends (hello/flush message);
Step S507, host node are waited for the flush message (carrying the 0x03 sign) that secondary node sends, and open the hello message counter;
When step S508, host node arrive pre-set threshold value 3 in message counter, judge the flush message of during counting, whether receiving secondary node,, forward step S509 to if do not receive, otherwise, forward step S510 to;
Step S509, host node are not received the flush message that secondary node sends in the time of sending 3 hello message continuously, host node then sends flush message voluntarily, notifies other nodes to refresh route;
Step S510, host node refresh transmitting of principal and subordinate's port.
Embodiment two
As shown in Figure 6, present embodiment is an executive agent with subsequent use node, sets forth the implementation method of up link protection, may further comprise the steps:
After step S601, secondary node start, receive the EAPS message that host node sends, and inaccessible subsequent use up link;
Step S602, secondary node are when carrying the 0x01 sign in the EAPS message that detects the host node transmission; Perhaps; (for example: in the detection failure duration (fail-period) of twice) do not received any message that host node sends in the time period of setting, and judges the main uplink failure of using;
Wherein, Secondary node does not receive that in the setting-up time section under any message scenario of host node transmission, host node possibly break down or the looped network chain rupture, at this moment; Host node can't notify secondary node to carry out the up link switching, so detect judgement voluntarily by secondary node.
Step S603, secondary node are opened subsequent use uplink port, launch subsequent use up link, refresh principal and subordinate's port of this node and transmit, and send other nodes of flush message informing that carry the 0x02 sign and refresh route;
Step S604, under the state of subsequent use up link work, secondary node receives when the reserved word segment value is 0x00 in the EAPS message (hello/flush message) that host node sends, and explain that the host node up link recovers normally to forward step S605 to;
Step S605, the inaccessible subsequent use up link of secondary node refresh principal and subordinate's port of this node and transmit, and send other nodes of flush message informing that carry the 0x03 sign and refresh route.
The method of the invention; The subsequent use up link of setting a secondary node and being connected with secondary node, and, carry out the transmission of up link control and management information through the EAPS message of expansion between secondary node and host node through expanding the reserved field of EAPS agreement; Realized redundancy protecting to up link; And need not increase other agreements newly, not only can guarantee the switch speed of up link, and not influence common transmission node, less the change of whole looped network.
As shown in Figure 7, the present invention also provides a kind of realization system of looped network up link protection, comprises an EAPS ring network host node and a plurality of EAPS looped network transmission node, and selected transmission node is a secondary node in said EAPS looped network transmission node; Said secondary node comprises:
Further, said message detection unit 710 comprises:
The first message detection subelement 711 is used to detect whether do not receive any message that host node sends in the setting-up time section, if, judge that the master uses uplink failure, trigger subsequent use up link and open subelement 713;
The second message detection subelement 712 is used for the EAPS message that host node sends is detected, and when in detecting this EAPS message, carrying the uplink failure sign, judges that the master uses uplink failure, triggers subsequent use up link and opens subelement 713; Wherein, the uplink failure identification information that carries is added in the reserved field of EAPS message;
Subsequent use up link is opened subelement 713, is used to open the subsequent use up link that said secondary node connects.
Further, said message detection unit also comprises: the 3rd message detection subelement 714;
Said the 3rd message detection subelement 714 is used under the state of subsequent use up link work, detects whether to receive the EAPS message that host node sends, if judge that the master recovers normal with up link, inaccessible said subsequent use up link;
Said message issues unit 720; Also being used for detecting the master at said the 3rd message detection subelement 714 recovers just often with up link; Other nodes send and transmit updating message in the EAPS looped network, are added with the sign that secondary node is being closed subsequent use up link in the reserved field of this message.
Further, said host node also is used to detect and whether receives that in the timing section said message issues the secondary node that carries that sends the unit and closing the EAPS message that subsequent use up link identifies, if then refresh the master and slave port of self and transmit; Otherwise other nodes send and transmit updating message in the EAPS looped network.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the implementation method of a looped network up link protection is characterized in that, a selected transmission node is a secondary node in Ethernet Automatic Protection Switching EAPS looped network; Said method comprises:
Said secondary node detects leading when using uplink failure of host node connection; Open the subsequent use up link that said secondary node connects; And updating message is transmitted in other nodes transmissions in the EAPS looped network, is added with the identification information that secondary node is starting subsequent use up link in the reserved field of this message.
2. the method for claim 1 is characterized in that, the main mode with uplink failure that said secondary node detects the host node connection comprises:
Said secondary node receives the EAPS message that host node sends; When in detecting this EAPS message, carrying the uplink failure sign; Judge that the master that host node connects uses uplink failure, wherein, the uplink failure identification information that carries is added in the reserved field of EAPS message; Perhaps,
When said secondary node does not receive any message of host node transmission in the setting-up time section, judge that the master that host node connects uses uplink failure.
3. method as claimed in claim 2 is characterized in that, the detection failure duration that said setting-up time section is a twice.
4. like claim 1 or 2 or 3 described methods, it is characterized in that under the state of subsequent use up link work, said method also comprises:
When said secondary node receives the EAPS message of host node transmission; Judge main normal with the up link recovery; Inaccessible said subsequent use up link; And updating message is transmitted in other nodes transmissions in the EAPS looped network, is added with the sign that secondary node is being closed subsequent use up link in the reserved field of this message.
5. method as claimed in claim 4 is characterized in that,
Said host node detects the EAPS message that secondary node is being closed subsequent use up link sign that carries of in the timing section, whether receiving the secondary node transmission, if then refresh the master and slave port of self and transmit; Otherwise said host node other nodes in the EAPS looped network send transmits updating message.
6. method as claimed in claim 5 is characterized in that, said timing section is to send the transmission duration of three health detection message continuously.
7. the realization system of a looped network up link protection comprises an EAPS ring network host node and a plurality of EAPS looped network transmission node, it is characterized in that, selected transmission node is a secondary node in said EAPS looped network transmission node;
Said secondary node comprises:
The message detection unit is used to detect the master that is connected with host node with up link fault whether, if open the subsequent use up link that said secondary node connects;
Message issues the unit, is used for detecting in said message detection unit main when use uplink failure, and updating message is transmitted in other nodes transmissions in the EAPS looped network, is added with the sign that secondary node is starting subsequent use up link in the reserved field of this message.
8. system as claimed in claim 7 is characterized in that, said message detection unit comprises:
The first message detection subelement is used to detect whether do not receive any message that host node sends in the setting-up time section, if, judge that the master uses uplink failure, trigger subsequent use up link and open subelement;
The second message detection subelement is used for the EAPS message that host node sends is detected, and when in detecting this EAPS message, carrying the uplink failure sign, judges that the master uses uplink failure, triggers subsequent use up link and opens subelement; Wherein, the uplink failure identification information that carries is added in the reserved field of EAPS message;
Subsequent use up link is opened subelement, is used to open the subsequent use up link that said secondary node connects.
9. like claim 7 or 8 described systems, it is characterized in that,
Said message detection unit also comprises: the 3rd message detection subelement;
Said the 3rd message detection subelement is used under the state of subsequent use up link work, detects whether to receive the EAPS message that host node sends, if judge that the master recovers normal with up link, inaccessible said subsequent use up link;
Said message issues the unit; Also being used for detecting the master at said the 3rd message detection subelement recovers just often with up link; Other nodes send and transmit updating message in the EAPS looped network, are added with the sign that secondary node is being closed subsequent use up link in the reserved field of this message.
10. system as claimed in claim 9; It is characterized in that; Said host node; Also be used to detect and whether receive that in the timing section said message issues the secondary node that carries that sends the unit and closing the EAPS message that subsequent use up link identifies, if then refresh the master and slave port of self and transmit; Otherwise other nodes send and transmit updating message in the EAPS looped network.
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| CN201010569928.3A CN102487348B (en) | 2010-12-02 | 2010-12-02 | Method and system for realizing looped network uplink protection |
| PCT/CN2011/078528 WO2012071905A1 (en) | 2010-12-02 | 2011-08-17 | Method and system for protecting ring network uplink |
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| CN201010569928.3A CN102487348B (en) | 2010-12-02 | 2010-12-02 | Method and system for realizing looped network uplink protection |
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| CN105103502A (en) * | 2013-03-28 | 2015-11-25 | 三菱电机株式会社 | Method for configuring node devices of a mesh communications network, computer program, information storage means and system |
| CN105103502B (en) * | 2013-03-28 | 2018-05-25 | 三菱电机株式会社 | For the method for the node device of configuration mesh communication network, computer program, information-storing device and system |
| CN106100954A (en) * | 2016-06-15 | 2016-11-09 | 北京航空航天大学 | A kind of APS redundancy approach based on SpaceWire bus |
| CN108833247A (en) * | 2018-05-18 | 2018-11-16 | 新华三技术有限公司 | Switching method again and device after link failure recovery |
| CN108833247B (en) * | 2018-05-18 | 2021-02-09 | 新华三技术有限公司 | Method and device for re-switching after link failure recovery |
Also Published As
| Publication number | Publication date |
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| CN102487348B (en) | 2015-04-01 |
| WO2012071905A1 (en) | 2012-06-07 |
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