CN1885799A - Method for rapidly detecting Ethernet exchanger loop failure - Google Patents
Method for rapidly detecting Ethernet exchanger loop failure Download PDFInfo
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- CN1885799A CN1885799A CNA2005100773566A CN200510077356A CN1885799A CN 1885799 A CN1885799 A CN 1885799A CN A2005100773566 A CNA2005100773566 A CN A2005100773566A CN 200510077356 A CN200510077356 A CN 200510077356A CN 1885799 A CN1885799 A CN 1885799A
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Abstract
The disclosed fast fault detection method for Ethernet exchanger loop comprises: A. the network CPU periodical sends form-ring detection message with a special field and known source physical address and target address as the broadcast address; B. the CPU reads every user port message of Ethernet exchanger to decide whether the user port form ring, yes to cast off all message of this port and notify manager to treat the fault; C. the CPU reads the message of exchanger external port for corresponding treatment. This invention can find out and treat fault in minimal time to reduce effect to network at maximal degree.
Description
Technical field
The present invention relates to a kind of method that is used for fast detecting Ethernet switch loop fault.
Background technology
Ethernet switch is the equipment that Virtual network operator is used always when building network, and it not only can improve utilization of network bandwidth, and, can also improve the reliability of the network operation widely.But in actual applications, operator finds owing to the operation lack of standardization to switch usually causes that loop fault appears in the switch device port.
Usually, the loop fault of switch ports themselves appearance is divided into monocycle loop fault and dicyclo loop fault.The monocycle loop fault is meant on the ports physical of switch and has formed loop, just refers to come in from this port again from the message that this port is gone out; The dicyclo loop fault is meant on two ports physical of switch and formed loop, just refers to the message that sends from port of switch, and the another one port from physical connection enters switch again.In case switch has physically formed loop, not only the loop port working is unusual, but also can cause whole network performance to descend.At first, can form broadcast storm, can be broadcast to all of the port at the inner broadcasting packet of switch, moment produces a large amount of broadcasting packets in whole network like this, causes network congestion; Secondly, in the network environment that forms loop,, cause the instability of message communication because the MAC Address self-learning function that exchanger chip possesses makes the MAC Address of equipment drift about; And this wrong can spreading in whole network reduced the service efficiency of user to network, increased user's use cost.
For so one can occur, and occur giving whole network bring the fault of massive losses at any time, no matter be the user, still run the commercial city and can't accept.But the agreement of present application technology as SpanningTree Protocol can only solve the loop problem that occurs between many switches, and the agreement complexity, and the response time is slow.For the loop fault that single device occurs, still can only lean on artificial discovery, the artificial solution.This mode is to investigate fault, solution fault by cost great amount of manpower and material resources and time, and the huge waste of benefit is conspicuous, and the cost of user and operator also is huge, and is more heavy as user's loss of enjoying service.
Summary of the invention
In view of the foregoing, the purpose of this invention is to provide a kind of method that detects the Ethernet switch loop fault.
For achieving the above object, the present invention by the following technical solutions: a kind of method of fast detecting Ethernet switch loop fault, this method may further comprise the steps:
A, network C PU send one at set intervals and become the ring detection messages, and the source physical address of this message is a known physical address, and destination address is a broadcast address;
B, network C PU read the message of each user port of Ethernet switch, and judge whether Cheng Huan of Ethernet switch user port, handle;
C, network C PU read the message that Ethernet switch outreaches port, whether have into the central port according to Ethernet switch, and the message that outreaches port is handled.
Described step B is finished by following steps:
1), network C PU reads the message that enters each user port of Ethernet switch;
2), check whether this port is into the central port; If network C PU is all the up-downgoing packet loss of this port, and notify the keeper to solve this port failure; Otherwise, carry out following operation;
3), network C PU resolves the message of each user port of Ethernet switch, judges whether this message is to become to encircle detection messages;
If illustrate that this port for becoming the central port, performs mark; Otherwise, the message of this port is directly transmitted;
4), repeat the 1st).
Described step C is finished by following steps:
1), reads Ethernet switch and outreach the port message;
2), check whether Ethernet switch exists into the central port; If there is no become the central port, then network C PU directly transmits this port message, jumps to the 1st); Otherwise, carry out following steps;
3) if there is into the central port, network C PU need further judge this port message, judge that this port message is broadcasting packet or the unicast message of going to into the central port?
4) if then network C PU is with this packet loss; Otherwise, this message is transmitted;
5), repeat the 1st).
When network C PU detects a certain port Cheng Huanhou of Ethernet switch, network C PU monitors this port, until this port loop trouble shooting, specifically may further comprise the steps:
(1), when network C PU whenever detect one become the central port after, generate a corresponding software counter automatically, and give the initial value of a nonzero value;
(2), the every transmission of CPU once becomes to encircle detection messages, will become the counter of central ports subtract 1 all;
(3), just this is become the counter of central port to revert to initial value if CPU detects into the ring detection messages again; Otherwise, carry out following steps;
(4), judge that whether the numerical value of counter be zero, if be zero, illustrate that fault gets rid of, this port is reverted to normal condition; If non-vanishing, the also not eliminating of this fault is described.
Include one in the described one-tenth ring detection messages and be used to be detected as the specific fields of encircling fault;
Described specific fields comprises three fields: Ethernet header field, GNMP protocol header fields, GNAP protocol fields; Wherein, GNMP agreement that uses and GNAP agreement are one group of self-defining NMPs, can be structured on the ethernet data link layer, and be independent of ICP/IP protocol.
Form in the Star Network at many switches, if loop fault occurs on a certain the switch, the method that adopts this paper to set forth, can be fast with the corresponding port of fault locking at this switch, not only can not influence whole network, the user of other ports also can use network normally on this switch.This can improve the efficient of the network operation greatly, and has ensured user's interests.
Description of drawings
Fig. 1 is a hardware components example structure schematic diagram of the present invention
Fig. 2 is that network C PU timed sending becomes ring detection messages subprogram block diagram
Fig. 3 detects the flow chart that Ethernet switch user port message judges whether into ring for network C PU
Fig. 4 outreaches port message process chart for network C PU detects Ethernet switch
Embodiment
The method of detection Ethernet switch loop fault disclosed by the invention is:
1, network C PU sends an one-tenth ring detection messages that contains specific fields to all user ports at set intervals, and the source physical address of this message is a known physical address, and destination address is a broadcast address;
2, network C PU reads the message of each user port of Ethernet switch, and judges whether Cheng Huan of Ethernet switch user port, handles;
3, network C PU reads the message that Ethernet switch outreaches port, whether has into the central port according to Ethernet switch, and the message that outreaches port is handled.
Because the exchange chip in the common Ethernet switch only is responsible for the message of exchanger user port, first line of a couplet port is transmitted, and the message of being transmitted is not carried out any analysis and judgement, so, for finishing said method provided by the invention, as shown in Figure 1, the present invention's network C PU has connected in the first line of a couplet port of Ethernet switch, and this network C PU has two network interfaces, and one links to each other with the first line of a couplet port of Ethernet switch; Another one really outreaches port as what integrate back equipment.As seen from the figure, because network C PU connects with Ethernet switch, network C PU frame is in the centre of ethernet data stream, so, network C PU can analyze all up-downgoing messages of Ethernet switch, judge Ethernet switch user port, outreach whether Cheng Huan of port.
Certainly, this network C PU also can directly be integrated in the Ethernet switch.In specific embodiments of the invention, the RC32438 chip that the present invention adopts IDT company to produce.
Below in conjunction with accompanying drawing, the method for above-mentioned detection Ethernet switch loop fault is elaborated:
As shown in Figure 2, network C PU sends an one-tenth ring detection messages that contains specific fields at set intervals, and the source physical address of this message is a known physical address, and destination address is a broadcast address.
Network C PU reads the message of each user port of Ethernet switch, and judges whether Cheng Huan of Ethernet switch user port, and as shown in Figure 3, concrete grammar is as follows:
1), network C PU reads the message that enters each user port of Ethernet switch
2), check whether this port is into the central port; If network C PU is all the up-downgoing packet loss of this port, and notify the keeper to solve this port failure; Otherwise, carry out following operation;
Network C PU finds its a certain port Cheng Huanhou, with the purpose of all up-downgoing packet loss of this port is to make affected scope only be limited in this one-tenth central port, stop into the ring fault and form network storm, solve into the ring fault in the problem that whole network spreads, guarantee that other user uses network normally.
The reason that has ready-made ring fault owing to switch ports themselves generally is because the fault on the switch physical level that artificial operation lack of standardization causes so become the recovery of ring non-working port, still needs artificial the participation to solve.This method can notify the keeper to carry out final processing by message mechanism after detecting, find out switch ports themselves and have ready-made ring fault by above step immediately.
3), network C PU resolves the message of each user port of Ethernet switch, judge this message whether be include specific fields and known physical address become the ring detection messages; If illustrate that this port for becoming the central port, performs mark, record; Otherwise, the message of this port is directly transmitted;
4), repeat the 1st).
In addition, network C PU also monitors the port that outreaches of Ethernet switch, whether has into the central port according to Ethernet switch, and the message that outreaches port is handled, and as shown in Figure 4, concrete grammar is as follows:
1), reads Ethernet switch and outreach the port message;
2), check whether Ethernet switch exists into the central port; If there is no become the central port, then network C PU directly transmits this port message, jumps to the 1st); Otherwise, carry out following steps;
3) if there is into the central port, network C PU need further judge this port message, judge that this port message is broadcasting packet or the unicast message of going to into the central port?
4) if then network C PU is with this packet loss; Otherwise, this message is transmitted;
5), repeat the 1st).
When network C PU detects a certain user port of Ethernet switch or outreaches port when loop fault occurring and becoming into the central port, whether network C PU just begins this port is monitored, monitor this port loop fault and remove, and concrete steps are:
(1), when network C PU whenever detect one become the central port after, generate a corresponding software counter automatically, and give the initial value of a nonzero value;
(2), the every transmission of CPU once becomes to encircle detection messages, will become the counter of central ports subtract 1 all;
(3), just this is become the counter of central port to revert to initial value if CPU detects into the ring detection messages again; Otherwise, carry out following steps;
(4), judge that whether the numerical value of counter be zero, if be zero, illustrate that fault gets rid of, this port is reverted to normal condition; If non-vanishing, the also not eliminating of this fault is described.
Indulge the above, the present invention by network C PU at regular intervals to the second line of a couplet port (being user port) of switch send contain specific fields and known address become the ring detection messages, and all messages that switch second line of a couplet port is received carry out analyzing and processing, whether have into ring detection messages, judge whether Cheng Huan of this port if searching; If the ring message is arranged into, this port Cheng Huan is described, network C PU just notifies the keeper to handle, and association message is abandoned, thereby, be implemented in and find loop in the shortest time; In the shortest time, in the degree of maximum, reduce the influence of loop to network, greatly improve the efficient of the network operation.
Illustrate the write method of above-mentioned one-tenth ring detection messages below.
In specific embodiments of the invention, above-mentioned one-tenth ring detection messages adopt standard in the modern operating system the socket programmed method, write according to GNMP agreement and GNAP protocol format, concrete compiling procedure is as follows:
A. create a raw socket by socket (PF_PACKET, SOCK_RAW, htons (ETH_P_ALL)) statement;
B. apply for that sends a data buffer zone, size definition is 100 bytes;
C. enclose specific fields at this buffering area, be designated loop detection message;
D. utilize this message of system function sendto () timed sending, as sending once for 5 seconds.
Described specific fields comprises three fields: Ethernet stem, GNMP protocol header, GNAP agreement.
GNMP agreement and GNAP agreement are one group of self-defining NMPs, can be structured on the ethernet data link layer, and be independent of ICP/IP protocol.
GNMP agreement full name is the Great Wall NMP, meets the network layer protocol of osi model, can be directly by framework on other protocol layer.GNMP protocol massages form is as follows:
| Version | Length | Keep | Keep | |
| State | Keep | Keep | Type | |
| Keep | Purpose ID | |||
| Keep | Source ID | |||
| Data | ||||
| Filler code | The verification counting | |||
Wherein:
Version: 4bit, protocol version defines different message formats, and the version of this document description is 0001;
Length: 12bit, whole GNMP message length;
Keep: 8bit keeps;
Keep: 8bit keeps;
State: 8bit, the marking equipment state;
Keep: 8bit keeps;
Keep: 8bit keeps;
Type: 8bit, the protocol massages type, having defined 0x09 is detection messages
Keep: 8bit keeps;
Purpose ID:24bit, the destination device sign keeps when loop detection;
Source ID:24bit, the source device sign keeps when loop detection;
Keep: 8bit keeps;
Data: 208～11840bit fills GNAP stem and data field part thereof;
Filler code: 16bit, filler code must be 0x00;
Verification counting: 16bit, 16 of whole message data add up and.
GNAP agreement full name is a Great Wall network application agreement, and it is a simple application agreement of GNMP agreement, is transport layer protocol, and it is nested in the data field of GNMP agreement.GNAP protocol massages form is as follows:
| The purpose command code | The source command code |
| State | Keep |
| Series of targets number | The source series number |
| Data | |
Wherein:
Purpose command code: 16bit, the object run sign indicating number, loop detection message be designated 0x0040;
Source command code: 16bit, the source command code, loop detection message be designated 0x0040;
State: 16bit, state;
Keep: 16bit keeps;
Series of targets number: 16bit, series of targets number keeps during loop detection;
Source series number SN:16bit, the source series number keeps during loop detection;
Data: data, there is not additional data during loop detection.
In becoming the ring detection messages, the source device field of Ethernet stem (known physical address), protocol fields (0xe370 represents the GNMP message), purpose in protocol fields of GNMP stem (0x09 represents detection messages) and the GNAP stem and source command code (0x0040 represents loop detection message) field are of paramount importance several fields, and they provide foundation for the loop detection module.
Form in the Star Network at many switches, if loop fault occurs on a certain the switch, the method that adopts this paper to set forth, can be fast with the corresponding port of fault locking at this switch, not only can not influence whole network, the user of other ports also can use network normally on this switch.This can improve the efficient of the network operation greatly, and has ensured user's interests.
Claims (5)
1, a kind of method of fast detecting Ethernet switch loop fault, this method may further comprise the steps:
A, network C PU send one at set intervals and become the ring detection messages, and the source physical address of this message is a known physical address, and destination address is a broadcast address;
B, network C PU read the message of each user port of Ethernet switch, and judge whether Cheng Huan of Ethernet switch user port, handle;
C, network C PU read the message that Ethernet switch outreaches port, whether have into the central port according to Ethernet switch, and the message that outreaches port is handled.
2, the method for a kind of fast detecting Ethernet switch loop fault according to claim 1, it is characterized in that: described step B is finished by following steps:
1), network C PU reads the message that enters each user port of Ethernet switch;
2), check whether this port is into the central port; If network C PU is all the up-downgoing packet loss of this port, and notify the keeper to solve this port failure; Otherwise, carry out following operation;
3), network C PU resolves the message of each user port of Ethernet switch, judges whether this message is to become to encircle detection messages;
If illustrate that this port for becoming the central port, performs mark; Otherwise, the message of this port is directly transmitted;
4), repeat the 1st).
3, the method for a kind of fast detecting Ethernet switch loop fault according to claim 1, it is characterized in that: described step C is finished by following steps:
1), reads Ethernet switch and outreach the port message;
2), check whether Ethernet switch exists into the central port; If there is no become the central port, then network C PU directly transmits this port message, jumps to the 1st); Otherwise, carry out following steps;
3) if there is into the central port, network C PU need further judge this port message, judge that this port message is broadcasting packet or the unicast message of going to into the central port?
4) if then network C PU is with this packet loss; Otherwise, this message is transmitted;
5), repeat the 1st).
4, according to the method for claim 1 or 2 or 3 described a kind of fast detecting Ethernet switch loop faults, it is characterized in that: a certain port Cheng Huanhou that detects Ethernet switch as network C PU, network C PU monitors this port, until this port loop trouble shooting, specifically may further comprise the steps:
(1), when network C PU whenever detect one become the central port after, generate a corresponding software counter automatically, and give the initial value of a nonzero value;
(2), the every transmission of CPU once becomes to encircle detection messages, will become the counter of central ports subtract 1 all;
(3), just this is become the counter of central port to revert to initial value if CPU detects into the ring detection messages again; Otherwise, carry out following steps;
(4), judge that whether the numerical value of counter be zero, if be zero, illustrate that fault gets rid of, this port is reverted to normal condition; If non-vanishing, the also not eliminating of this fault is described.
5, according to the method for claim 1 or 2 or 3 described a kind of fast detecting separate unit Ethernet switch loop faults, it is characterized in that: include one in the described one-tenth ring detection messages and be used to be detected as the specific fields of encircling fault;
Described specific fields comprises three fields: Ethernet header field, GNMP protocol header fields, GNAP protocol fields;
GNMP agreement and GNAP agreement are one group of self-defining NMPs, can be structured on the ethernet data link layer, and be independent of ICP/IP protocol;
GNMP protocol massages form is as follows:
Version Length Keep Keep
State Keep Keep Type
Keep Purpose ID
Keep Source ID
Data
Filler code The verification counting
Wherein:
Version: 4bit, protocol version defines different message formats, and the version of this document description is 0001;
Length: 12bit, whole GNMP message length;
Keep: 8bit keeps;
Keep: 8bit keeps;
State: 8bit, the marking equipment state;
Keep: 8bit keeps;
Keep: 8bit keeps;
Type: 8bit, the protocol massages type, having defined 0x09 is detection messages
Keep: 8bit keeps;
Purpose ID:24bit, the destination device sign keeps when loop detection;
Source ID:24bit, the source device sign keeps when loop detection;
Keep: 8bit keeps;
Data: 208～11840bit fills GNAP stem and data field part thereof;
Filler code: 16bit, filler code must be 0x00;
Verification counting: 16bit, 16 of whole message data add up and;
GNAP protocol massages form is as follows:
The purpose command code The source command code
State Keep
Series of targets number The source series number
Data
Wherein:
Purpose command code: 16bit, the object run sign indicating number, loop detection message be designated 0x0040;
Source command code: 16bit, the source command code, loop detection message be designated 0x0040;
State: 16bit, state;
Keep: 16bit keeps;
Series of targets number: 16bit, series of targets number keeps during loop detection;
Source series number SN:16bit, the source series number keeps during loop detection;
Data: data, there is not additional data during loop detection.
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| CNB2005100773566A CN100495985C (en) | 2005-06-22 | 2005-06-22 | Method for rapidly detecting Ethernet exchanger loop failure |
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| CN101242315B (en) * | 2008-02-26 | 2010-08-18 | 中兴通讯股份有限公司 | Loop detection method |
| CN101291258B (en) * | 2007-04-19 | 2010-12-29 | 中兴通讯股份有限公司 | Ethernet loop processing method when connecting multiple frames on communication platform |
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| CN101707538B (en) * | 2009-11-25 | 2011-09-14 | 烽火通信科技股份有限公司 | Method for detecting and automatically recovering Ethernet loopback |
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| CN101707538B (en) * | 2009-11-25 | 2011-09-14 | 烽火通信科技股份有限公司 | Method for detecting and automatically recovering Ethernet loopback |
| CN102916850A (en) * | 2012-08-23 | 2013-02-06 | 歌尔声学股份有限公司 | Computer network loop detecting method |
| CN102916850B (en) * | 2012-08-23 | 2015-08-26 | 歌尔声学股份有限公司 | A kind of computer network loop detecting method |
| CN104283730A (en) * | 2013-07-08 | 2015-01-14 | 深圳市共进电子股份有限公司 | Loop detecting method and system |
| CN105071977A (en) * | 2015-09-15 | 2015-11-18 | 深圳市万网博通科技有限公司 | Switch-based network operation quality self-inspection and self-healing method |
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