CN104579794B - Query facility fault detection method and device - Google Patents
Query facility fault detection method and device Download PDFInfo
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- CN104579794B CN104579794B CN201510040597.7A CN201510040597A CN104579794B CN 104579794 B CN104579794 B CN 104579794B CN 201510040597 A CN201510040597 A CN 201510040597A CN 104579794 B CN104579794 B CN 104579794B
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Abstract
The present invention provides a kind of query facility fault detection method and device, wherein this method comprises: the flux of multicast via the Multicast Routing equipment transmission as query facility that monitoring receives；When determine the flux of multicast be less than preset flow threshold value, and when the duration that the flux of multicast is less than preset flow threshold value reaching preset time, EB packet is sent to other Multicast Routing equipment where this Multicast Routing equipment in local area network, to re-elect query facility.The present invention can quickly detect the query facility of failure, and select new query facility processing flux of multicast in time, so that the interruption duration of multicast service be effectively reduced.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of query facility fault detection methods and device.
Background technique
In the prior art, when in local area network there are multiple support multicast management protocols (such as igmpinternet IGMPv2,
IGMPv3 or multicast listener discovery MLD agreement) Multicast Routing equipment when, a Multicast Routing can be selected according to election mechanism
Equipment is responsible for sending query message and forwarding multicast flow as unique query facility.Other Multicast Routing equipment are then made
For non-query facility.Each non-query facility is provided with timer, sets if not receiving inquiry in the timing length of timer
The query message that preparation is sent, non-query facility then think query facility failure, and initiate new query facility election process.
According to the regulation of multicast management protocol, to the timing length of the setting of timer are as follows: the polling interval healthy and strong property coefficient *
+ maximum response time/2 are usually defaulted as 255 seconds.That is, non-query facility may need longest etc. after query facility failure
The failure of query facility can be just perceived to 255 seconds, then re-start new query facility election again, and then lead to multicast data flow
It is longer to measure the break period.
Summary of the invention
In view of the drawbacks of the prior art, the present invention provides a kind of query facility fault detection method and devices.
The present invention provides a kind of query facility fault detection methods, set applied to the Multicast Routing as non-query facility
It is standby, wherein this method comprises:
Monitor the flux of multicast via the Multicast Routing equipment transmission as query facility received；
When determining that the flux of multicast is less than preset flow threshold value, and it is less than preset flow threshold value in the flux of multicast
When duration reaches preset time, election is sent to other Multicast Routing equipment where this Multicast Routing equipment in local area network
Message, to re-elect query facility.
The present invention also provides a kind of query facility fault detection means, set applied to the Multicast Routing as non-query facility
Standby, described device includes:
Monitoring unit, for monitoring the multicast data flow via the Multicast Routing equipment transmission as query facility received
Amount；
Determination unit for being less than preset flow threshold value when the determining flux of multicast, and is less than in the flux of multicast
When the duration of preset flow threshold value reaches preset time, to other multicast paths where this Multicast Routing equipment in local area network
EB packet is sent by equipment, to re-elect query facility.
Query facility fault detection method and device provided by the invention are detecting the group sent via query facility
Flow is broadcast less than preset threshold, and when the duration that the flux of multicast is less than preset flow threshold value reaching preset time,
It determines query facility possible breakdown, sends election report to other Multicast Routing equipment where Multicast Routing equipment in local area network
Text, to re-elect query facility.It can be seen that the present invention can quickly detect the query facility of failure, and select in time
New query facility handles flux of multicast, so that the interruption duration of multicast service be effectively reduced.
Detailed description of the invention
Fig. 1 is the network environment schematic diagram in the embodiment of the present invention；
Fig. 2 is a kind of query facility fault detection method flow diagram in the embodiment of the present invention；
Fig. 3 is a kind of logical construction schematic diagram of query facility fault detection means in the embodiment of the present invention；
Fig. 4 is the hardware structure signal of Multicast Routing equipment where query facility fault detection means in the embodiment of the present invention
Figure.
Specific embodiment
For the purpose for making the application, technical solution and advantage are more clearly understood, referring to the drawings to application scheme
It is described in further detail.
In order to solve the problems in the existing technology, the present invention provides a kind of query facility fault detection method and
Device.
Fig. 1 is network environment schematic diagram applied by query facility fault detection method of the present invention, includes handing in the networking
It changes planes (Switch), multiple Multicast Routing equipment (such as Router 1, Router2 and Router3) and multiple main frames (example
Such as Host1, Host12 and Host3), each multicast routing device include again multiple ports (such as Port1 on Router1,
Port2).The interchanger, multiple Multicast Routing equipment and host are in same local area network.
Referring to FIG. 2, being the processing flow schematic diagram of query facility fault detection method provided by the invention, which is set
Standby fault detection method can be applied to the Multicast Routing equipment as non-query facility, which, which can be, enables
IGMP (Internet Group Management Protocol, igmpinternet) and/or MLD (Multicast
Listener Discover, multicast listener discovery protocol) agreement equipment, which includes following
Step:
Step 201, the flux of multicast via the Multicast Routing equipment transmission as query facility received is monitored；
When Multicast Routing equipment in local area network starts, election report can be mutually sent between each multicast routing device
Text, and a Multicast Routing equipment is elected as query facility by the EB packet, other Multicast Routing equipment are made
For non-query facility.Wherein, electing query facility by the EB packet noticed between each multicast routing device includes:
After receiving the EB packet that each multicast routing device is sent, by the IP address of itself and received all elections
The source IP address of message is compared, and elects IP address maximum or the smallest Multicast Routing equipment as query facility.
Later, the multicast sent via other networks except the local area network is uniformly received by the query facility elected
Flow, and the flux of multicast is forwarded to via interchanger to all non-query facilities in local area network.
After electing query facility, each Multicast Routing equipment as non-query facility saves the letter of query facility
Breath, the information include the Multicast Routing device identification of query facility, on query facility with this Multicast Routing equipment connectivity port
Port information etc..
Then, start the flux of multicast via the Multicast Routing equipment transmission as query facility that monitoring receives, that is,
Monitor the multicast port for itself enabling multicast management protocol the received flux of multicast sent by query facility.Wherein, respectively
Multicast Routing equipment preserves the multicast member list item obtained according to study, receives flux of multicast in non-query facility
When, can determine whether the flux of multicast is via the Multicast Routing equipment as query facility according to the multicast member list item
It sends.Specifically, can check the source IP address of received flux of multicast, if the source IP address with itself enable multicast pipe
The IP address for managing the multicast port of agreement is not same network segment, and the corresponding multicast of destination IP for itself preserving the flux of multicast
Group membership's list item, it is believed that the flux of multicast is the flux of multicast via the Multicast Routing equipment transmission as query facility.
Further, when being monitored to the flux of multicast of the Multicast Routing equipment transmission as query facility, if sentencing
The current flux of multicast that breaks is relatively stable, for example, within a certain period of time the received Multicast Routing by as query facility set
When the flux of multicast that preparation is sent is positively retained within the scope of certain numerical value, can periodically it be set to what is received via as inquiry
The flux of multicast that standby Multicast Routing equipment is sent is monitored；If judging, current flux of multicast is unstable, for example, being received
Query facility send flux of multicast when it is more when it is few, can be in real time to receiving via the Multicast Routing as query facility
The flux of multicast that equipment is sent is monitored, so that monitoring result is more accurate.
Step 202, when determining that the flux of multicast is less than preset flow threshold value, and it is less than default stream in the flux of multicast
When measuring the duration arrival preset time of threshold value, query facility possible breakdown is determined, to local where this Multicast Routing equipment
Other Multicast Routing equipment in net send EB packet, to re-elect query facility.
In the present invention, a flow threshold and a timer can be preset in advance, which is additionally provided with a timing length,
That is the preset time need to be set to be less than stalwartness property coefficient * as defined in multicast management protocol when the preset time is arranged
255 seconds defaulted in polling interval+maximum response time/2 or multicast management protocol.
In flux of multicast monitoring process, if the multicast that sends of the received Multicast Routing equipment as query facility
Flow once reaches preset flow threshold value (such as the preset flow threshold value is 0), then triggers and open preset timer, if
In the preset time (such as 30 seconds) of timer, the received Multicast Routing equipment as query facility of this Multicast Routing equipment is sent out
The flux of multicast sent always remains as the preset flow threshold value 0, illustrates query facility possible breakdown.
At this point, this Multicast Routing equipment deletes the information of the query facility of itself preservation, and using itself as query facility
The flux of multicast that other networks except local area network where receiving this Multicast Routing equipment are sent, and it is forwarded to by interchanger
His Multicast Routing equipment, to prevent the flux of multicast for being sent to host from interrupting during this period.
It should be noted that can then stop the multicast end to itself when this Multicast Routing equipment is as query facility
Mouth carries out the monitoring of flux of multicast.
Then, other Multicast Routing equipment where this Multicast Routing equipment to this Multicast Routing equipment in local area network are sent
EB packet.Since other each Multicast Routing equipment are also sent in monitoring by former query facility as this Multicast Routing equipment
Flow, and can monitor identical as a result, therefore other each Multicast Routing equipment are determining former query facility possible breakdown
When, EB packet can also be sent to this Multicast Routing equipment.This Multicast Routing equipment is receiving other each Multicast Routings
After the EB packet that equipment is sent, by the source IP address of the IP address of this Multicast Routing equipment and received all EB packets into
Row compares, and elects IP address maximum or the smallest Multicast Routing equipment as query facility.
In addition, the group via the Multicast Routing equipment transmission as query facility that the embodiment of the present invention is received in monitoring
Flow is broadcast less than preset flow threshold value, and when the duration that flux of multicast is less than preset flow threshold value reaching preset time,
Query facility failure can not be determined completely.It is also possible that causing each multicast routing device because multicast source devices break down
Flux of multicast cannot be received, former query facility at this time is practical be normal operation Multicast Routing equipment.
If such situation, when mutually sending EB packet between each Multicast Routing equipment, the original query facility
It can receive the EB packet of each multicast routing device, and EB packet re-elects query facility based on the received.Simultaneously
To each Multicast Routing device replied EB packet, so that the former query facility of the normal operation also assists in other each multicast paths
In the query facility election that this is carried out by equipment.
Under normal conditions, since the IP address of each multicast routing device has not been changed, re-electing query facility
When, the former query facility of normal operation can be still query facility by election again.
After electing query facility, still sent by unified receive of query facility via other networks except the local area network
Flux of multicast, and the flux of multicast is forwarded to via interchanger to all non-query facilities in local area network.Non- query facility
Continue the flux of multicast via the Multicast Routing equipment transmission as query facility that monitoring receives, to judge query facility
Operating status.
It further, can also be periodically to each in the Multicast Routing equipment normal operation as query facility
Multicast Routing equipment as non-query facility sends query message, to inform non-query facility, the normal operation of query facility.
A timer can also be arranged in each non-query facility in the embodiment of the present invention again, if the timing in the timer is inscribed
The query message that query facility is periodically sent is received, determines query facility normal operation, and resets the timing of timer.If
It does not receive the query message that query facility is periodically sent in timing, can also determine query facility failure, and according to
Above-mentioned election process re-elects query facility.
Heretofore described EB packet is also possible to above-mentioned query message.In query facility failure, other each groups
When broadcasting routing device as query facility, each multicast routing device can elect new inquiry to set by mutually sending query message
It is standby；When multicast source devices failure causes query facility that cannot send flux of multicast, query facility is receiving other each multicasts
After the query message that routing device is sent, query facility will be also replied correspondingly to participate in the election of query facility.
The embodiment of the present invention is illustrated below in conjunction with Fig. 1.
By taking each multicast routing device in same local area network is to enable the IGMP equipment of IGMP agreement as an example, it is assumed that
After conducting an election, using Multicast Routing equipment Router1 as query facility, Router2 and Router3 are that non-inquiry is set
Standby, wherein the Port4 of the Port1 of Router1 and the Port3 of Port2, Router2 and Router3 are to enable IGMP agreement
Multicast port.
Router2 monitoring multicast port Port3 the multicast data flow sent of the received Router1 via as query facility
Amount, that is, the source IP address of the flux of multicast monitored and the address multicast port Port3IP be not in same network segment, and Router1 is saved
There is the corresponding multicast member list item of the destination IP of the flux of multicast.
If its pre-set preset flow threshold value is 0, the preset duration of timer is set as 10 seconds, then monitoring
Port3 the received flux of multicast sent via Router1 when being 0, determine the multicast data flow sent of received query facility
Amount reaches preset flow threshold value, triggers opening timing device, and in the preset time of timer 10 seconds, the received warp of Port3 institute
It is continuously 0 by the flux of multicast that Router1 is sent, illustrates the Router1 possible breakdown as query facility.
At this point, the Multicast Routing equipment Router2 as non-query facility stops prison rapidly using itself as query facility
Survey Port3 the received flux of multicast sent via Router1.Other networks hair other than local area network where receiving it simultaneously
The flux of multicast come, and Router1 and Router3 are forwarded to by interchanger, to prevent the flux of multicast for being sent to host from existing
It is interrupted during this.
Then, other flux of multicast equipment Router1 and Router3 of the Router 2 into local area network send election report
Text, while the EB packet that the flux of multicast equipment that also can receive other normal operations is sent, if Router2 is received
EB packet in do not include EB packet that former query facility Router1 is sent, can determine Router1 failure, and from connecing
IP address maximum is selected in the source IP address and own IP address of all EB packets received or the smallest Multicast Routing is set
It is standby to be used as query facility.If however Router2 include in received EB packet original query facility Router1 transmission election
Message, it may be possible to because multicast source devices failure causes Router1 to send without flux of multicast, illustrate former query facility Router1 fortune
Row is normal, then all EB packets re-elect out query facility based on the received, in the IP address of each multicast routing device
In the case where constant, usually it can still elect former query facility Router1 as query facility.
The process that Router3 is executed is identical as Router2, and details are not described herein.
The present invention also provides a kind of query facility fault detection means, Fig. 3 is the knot of the query facility fault detection means
Structure schematic diagram, the device can be applied in the Multicast Routing equipment as non-query facility, the query facility fault detection means
It may include monitoring unit 301 and determination unit 302, in which:
Monitoring unit 301, for monitoring the multicast via the Multicast Routing equipment transmission as query facility received
Flow；
Determination unit 302, for being less than preset flow threshold value when the determining flux of multicast, and it is small in the flux of multicast
When the duration of preset flow threshold value reaching preset time, query facility possible breakdown is determined, to this Multicast Routing equipment
Other Multicast Routing equipment in the local area network of place send EB packet, to re-elect query facility.
Further, the monitoring unit 301 specifically can be used for periodically monitoring setting via as inquiry of receiving
The flux of multicast that standby Multicast Routing equipment is sent；Alternatively, real-time monitoring receive via the multicast path as query facility
The flux of multicast sent by equipment.
Further, described device can also include deleting unit 303, the letter of the query facility for deleting itself preservation
Breath, and using this Multicast Routing equipment as query facility.
Further, described device can also include election unit 304, for receiving other multicast paths in the local area network
The EB packet sent by equipment, the IP address of itself is compared with the source IP address of received all EB packets, is selected
IP address maximum or the smallest Multicast Routing equipment are enumerated as query facility.
Further, the election unit 304 specifically can be also used for receiving the Multicast Routing equipment as query facility
The EB packet sent after EB packet is received in non-failure.
In addition, the query facility fault detection means that the present invention is applied to the Multicast Routing equipment as non-query facility exists
Can be consistent with the process flow of above-mentioned query facility fault detection method in specific process flow, details are not described herein.
Above-mentioned apparatus can also pass through hardware realization, query facility fault detection dress of the present invention by software realization
The hardware structure schematic diagram of Multicast Routing equipment can refer to shown in Fig. 4 where setting, and basic hardware environment includes central processing
Device CPU, forwarding chip, memory and other hardware, wherein include machine readable instructions in memory device, and CPU reads and holds
Row machine readable instructions execute the function of each unit in Fig. 3.
As can be seen that the embodiment of the present invention is being detected via inquiry from the embodiment of the above various method and apparatus
The flux of multicast that equipment is sent is less than preset threshold, and reaches in the duration that the flux of multicast is less than preset flow threshold value
When preset time, query facility possible breakdown is determined, to other Multicast Routing equipment where Multicast Routing equipment in local area network
EB packet is sent, to re-elect query facility.It can be seen that the present invention can quickly detect the query facility of failure, and
New query facility processing flux of multicast is selected in time, so that the interruption duration of multicast service be effectively reduced.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (10)
1. a kind of query facility fault detection method, applied to the Multicast Routing equipment as non-query facility, which is characterized in that
The described method includes:
Monitor the flux of multicast via the Multicast Routing equipment transmission as query facility received；
When determining that the flux of multicast is less than preset flow threshold value, and it is less than preset flow threshold value in the flux of multicast and continues
When time reaches preset time, election report is sent to other Multicast Routing equipment where this Multicast Routing equipment in local area network
Text, to re-elect query facility；Wherein, the preset time is less than designated value, and the designated value was equal to 255 seconds, either,
The designated value=the polling interval stalwartness property coefficient *+maximum response time/2.
2. the method as described in claim 1, which is characterized in that it is described monitor receive via the multicast as query facility
The flux of multicast that routing device is sent specifically includes:
Periodically monitor the flux of multicast via the Multicast Routing equipment transmission as query facility received；Alternatively,
The flux of multicast via the Multicast Routing equipment transmission as query facility that real-time monitoring receives.
3. the method as described in claim 1, which is characterized in that after determining query facility possible breakdown, to this multicast
Before other Multicast Routing equipment in local area network where routing device send EB packet, the method also includes:
Delete the information of the query facility of itself preservation；
Using this Multicast Routing equipment as query facility.
4. the method as described in claim 1, which is characterized in that in other groups to where this Multicast Routing equipment in local area network
After broadcasting routing device transmission EB packet, the method also includes:
The EB packet that other Multicast Routing equipment are sent in the local area network is received, the IP address of itself is owned with received
The source IP address of EB packet is compared, and elects IP address maximum or the smallest Multicast Routing equipment as query facility.
5. method as claimed in claim 4, which is characterized in that described to receive other Multicast Routing equipment hairs in the local area network
The EB packet sent includes:
It receives the Multicast Routing equipment as query facility and receives the election report sent after EB packet in non-failure
Text.
6. a kind of query facility fault detection means, applied to the Multicast Routing equipment as non-query facility, which is characterized in that
Described device includes:
Monitoring unit, for monitoring the flux of multicast via the Multicast Routing equipment transmission as query facility received；
Determination unit, for being less than preset flow threshold value when the determining flux of multicast, and in the flux of multicast less than default
When the duration of flow threshold reaches preset time, set to other Multicast Routings where this Multicast Routing equipment in local area network
Preparation send EB packet, to re-elect query facility；Wherein, the preset time is less than designated value, and the designated value is equal to
255 seconds, either, the designated value=polling interval stalwartness property coefficient *+maximum response time/2.
7. device as claimed in claim 6, which is characterized in that the monitoring unit is specifically used for:
Periodically monitor the flux of multicast via the Multicast Routing equipment transmission as query facility received；Alternatively,
The flux of multicast via the Multicast Routing equipment transmission as query facility that real-time monitoring receives.
8. device as claimed in claim 6, which is characterized in that described device further include:
Unit is deleted, the information of the query facility for deleting itself preservation, and using this Multicast Routing equipment as query facility.
9. device as claimed in claim 6, which is characterized in that described device further include:
Unit is elected, for receiving the EB packet that other Multicast Routing equipment are sent in the local area network, by the IP of itself
Location is compared with the source IP address of received all EB packets, elects IP address maximum or the smallest Multicast Routing equipment
As query facility.
10. device as claimed in claim 9, which is characterized in that the election unit is specifically also used to:
It receives the Multicast Routing equipment as query facility and receives the election report sent after EB packet in non-failure
Text.
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| CN101068214A (en) * | 2007-06-26 | 2007-11-07 | 华为技术有限公司 | Route convergent method and equipment |
| CN101420381A (en) * | 2008-12-08 | 2009-04-29 | 杭州华三通信技术有限公司 | Method and apparatus for enhancing forwarding reliability in VRRP load balance |
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