CN103746922B - Method and device for forwarding multicast messages - Google Patents
Method and device for forwarding multicast messages Download PDFInfo
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- CN103746922B CN103746922B CN201310696072.XA CN201310696072A CN103746922B CN 103746922 B CN103746922 B CN 103746922B CN 201310696072 A CN201310696072 A CN 201310696072A CN 103746922 B CN103746922 B CN 103746922B
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Abstract
The embodiment of the invention provides a method and a device for forwarding multicast messages. The method is applied to a stacking system including a plurality of forwarding units. Each forwarding unit implements the following steps: receiving a first multicast message through any entrance interface, and judging whether local exit interfaces include exit interfaces of the first multicast message according to the open mode of a VLAN corresponding to the entrance interface and a locally-preset multicast table entry; forwarding the first multicast message through corresponding exit interfaces if the local exit interfaces include exit interfaces of the first multicast message, and carrying a VLAN identifier in the first multicast message to form a second multicast message and forwarding the second multicast message through each local stacking port; and carrying a VLAN identifier in the first multicast message to form a second multicast message and forwarding the second multicast message through each local stacking port to instruct the current forwarding unit receiving the second multicast message to perform a series of forwarding processes if the local exit interfaces do not include exit interfaces of the first multicast message. Forwarding of a single message among the stacking ports of the stacking system is realized, and bandwidth consumption of the stacking ports is reduced.
Description
Technical field
The present invention relates to communication technical field, more particularly, to a kind of retransmission method of multicast message and device.
Background technology
Pile system (stacking system) refers to more than one retransmission unit by respective stack port (i.e.
Stacking opening) couple together, form one " logical device ", run as a logic switching entity, it is right that such user passes through
This " logical device " is managed, you can realize all of switching equipment in " logical device " is managed.
Specifically, above-mentioned retransmission unit may be disposed on exchange chip, and now, above-mentioned pile system is by multiple exchange cores
Piece composition；May also be disposed on switching equipment, now, above-mentioned pile system is made up of multiple switching equipment；Also can set
It is placed on exchange line card, now, above-mentioned pile system exchanges, by multiple, (the such as case type switching equipment) that line card forms.
At present, above-mentioned pile system is generally divided into linear pile system and loop wire pile system, each in linear pile system
Path between retransmission unit is unique；In loop wire pile system, the path between each retransmission unit is not unique；But,
No matter for the pile system under which kind of framework, when forwarding to multicast message, generally adopting centralized duplication to forward
Mode forwards, and concrete forwarding process is as follows:
For each retransmission unit in pile system,, when receiving a multicast message, first, determining should for it
The outgoing interface (i.e. the multicast downstream port of multicast message) of bar multicast message, and the quantity according to the outgoing interface determined, to this
Multicast message is replicated, that is, the bar number of the multicast message replicating is identical with the quantity of the outgoing interface determined；Then, determining
When the outgoing interface going out is local outgoing interface, the outgoing interface that the multicast message of duplication is passed through to determine forwards；Determining
Outgoing interface be other retransmission units outgoing interface when, according to the local multicast list preserving, the multicast message of duplication is passed through
Related stack mouth sends the retransmission unit belonging to the outgoing interface determined, by these retransmission units further according to the local group preserving
Broadcast list item, the multicast message receiving is forwarded by corresponding outgoing interface.
It should be noted that the multicast list that in above-mentioned pile system, each retransmission unit preserves is all identical, every
In individual multicast list, with the index that is designated of each retransmission unit, all can inquire each retransmission unit all stacking opening and
All outgoing interfaces etc., so that retransmission unit replicates and forwarding multicasting message.
Below, the forwarding process of above-mentioned multicast message is described in detail taking linear pile system as a example:
As shown in figure 1, being including the switch 11 being provided with retransmission unit, switch 12, switch 13 and switch
14 linear pile system.Where it is assumed that switch 11 receives a multicast message, and this multicast message has 4 to go out
The outgoing interface 1 of interface, respectively switch 11, the outgoing interface 2 of switch 12, the outgoing interface 3 of switch 13 and switch 14
Outgoing interface 4.
So, in this case, switch 11 replicates 4 parts of multicast messages, then, a multicast message replicating is led to
Cross the outgoing interface 1 of itself to forward, the multicast message of remaining 3 parts duplications is sent to switch 12 by stacking opening；Switch
After 12 multicast messages receiving this 3 parts duplications, a multicast message replicating is forwarded by the outgoing interface 2 of itself, will remain
The multicast message of 2 parts of remaining duplications is sent to switch 13 by stacking opening；The group that switch 13 receives this 2 parts duplications is reported
Wen Hou, a multicast message replicating is forwarded by the outgoing interface 3 of itself, and last a multicast message replicating is passed through heap
Folded mouth sends to switch 14；After switch 14 receives the multicast message that this part replicates, this multicast message is passed through itself
Outgoing interface 4 forwards.
Can be seen that the switch any one pile system being provided with to retransmission unit from above-mentioned forwarding process
For, it is receiving thousands of up to a hundred multicast messages, and in the case that the outgoing interface of every multicast message is all more, needs many
Secondary duplication, and by the multicast message of the disposable transmission copying of related stack mouth, so, just take related stack mouth relatively
Many bandwidth resources, are easily caused a large amount of loss of multicast message, and then make the success rate that multicast message forwards relatively low.
Content of the invention
Embodiments provide a kind of retransmission method of multicast message and device, in order to solve existing multicast message
Pass-through mode takies more stacking opening broadband resource and forwards the relatively low problem of success rate.
Based on the problems referred to above, a kind of retransmission method of multicast message provided in an embodiment of the present invention, the method is applied to wrap
Include in the pile system of multiple retransmission units, each retransmission unit in described pile system is performed both by following step:
First multicast message is received by arbitrary incoming interface, and according to the corresponding VLAN of described incoming interface
The open mode of (virtual local area network, vlan) and locally default multicast list, judge locally to go out to connect
With the presence or absence of the outgoing interface of described first multicast message in mouthful；
When being judged as NO, after described first multicast message carries described vlan mark formation the second multicast message,
Pass through each local stacking opening respectively to forward, instruction receives the current retransmission unit of the second multicast message, execution following step:
Vlan mark according to entrained by described second multicast message, and locally default multicast list, judge in the outgoing interface of itself
Outgoing interface with the presence or absence of described second multicast message；If so, described second multicast message is reverted to described first group of report
Wen Hou, passes through corresponding outgoing interface respectively and forwards, and described second multicast message is passed through respectively itself except receiving second group
Report the stacking opening outside the stacking opening of literary composition to forward, received the retransmission unit of the second multicast message again as described current
Retransmission unit, the step returning described current retransmission unit execution, until described current retransmission unit determines that itself includes one
Terminate during individual stacking opening；Otherwise, by described second multicast message respectively pass through respective except the heap receiving the second multicast message
Stacking opening outside folded mouth forwards, the retransmission unit being received the second multicast message again as described current retransmission unit,
The step returning described current retransmission unit execution, until described current retransmission unit determine itself include a stacking opening when
Terminate.
A kind of retransmission unit of multicast message provided in an embodiment of the present invention, described device is applied to including multiple described dresses
In the pile system put, comprising:
Receiver module, for receiving the first multicast message by arbitrary incoming interface；
Judge module, for the default multicast of the open mode according to the corresponding vlan of described incoming interface and described device
List item, judges to whether there is the outgoing interface of described first multicast message in local outgoing interface；
Forwarding module, described for when described judge module is judged as NO, carrying in described first multicast message
After vlan mark forms the second multicast message, pass through each local stacking opening respectively and forward；
Indicating module, for, after described forwarding module forwards described second multicast message, instruction receives the second multicast
The current switching equipment of message, executes following step: the vlan mark according to entrained by described second multicast message, and locally pre-
If multicast list, judge in the outgoing interface of itself whether there is described second multicast message outgoing interface；If so, by described
After two multicast messages revert to described first multicast message, pass through corresponding outgoing interface respectively and forward, and described second group is reported
Literary composition passes through the stacking opening in addition to receiving the stacking opening of the second multicast message of itself respectively and forwards, and will receive second again
, as described present apparatus, the step returning described current switching equipment execution, until described current friendship for the device of multicast message
Exchange device is determined and itself is included terminating during a stacking opening；Otherwise, described second multicast message is passed through respectively respective removing
Receive the stacking opening outside the stacking opening of the second multicast message to forward, received again the device of the second multicast message as
Described present apparatus, the step returning described current switching equipment execution, until described current switching equipment determines itself bag
Terminate when including a stacking opening.
The beneficial effect of the embodiment of the present invention includes:
A kind of retransmission method of multicast message provided in an embodiment of the present invention and device, in the method, for stacking system
For any one retransmission unit in system, after the first multicast message is received by arbitrary incoming interface, according to incoming interface pair
The open mode of the vlan answering and locally default multicast list, judge to whether there is the first multicast message in local outgoing interface
Outgoing interface；When being judged as NO, after the first multicast message carries vlan mark formation the second multicast message, pass through every respectively
Individual local stacking opening forwards, and instruction receives the current retransmission unit of the second multicast message, executes following step: according to second group
Report the vlan mark entrained by literary composition, and locally default multicast list, judge to whether there is second group in the outgoing interface of itself
Report the outgoing interface of literary composition；If so, the second multicast message is reverted to after the first multicast message, turned by corresponding outgoing interface respectively
Send out, and the second multicast message is turned by the stacking opening in addition to receiving the stacking opening of the second multicast message of itself respectively
Send out, the retransmission unit being received the second multicast message again, as described current retransmission unit, returns current retransmission unit and holds
The step of row, terminates when current retransmission unit is determined and itself included a stacking opening；Otherwise, the second multicast message is divided
Do not forwarded by respective stacking opening in addition to receiving the stacking opening of the second multicast message, the second multicast will be received again
The retransmission unit of message, as described current retransmission unit, the step returning current retransmission unit execution, forwards list until current
Unit determines and itself includes terminating during a stacking opening.
It can be seen that, in embodiments of the present invention, it is the open mode of the corresponding vlan of each interface according to retransmission unit, and
The corresponding multicast list of setting in advance, executes related forwarding mechanism, and that is, certain incoming interface in retransmission unit receives multicast
After message, no matter this incoming interface corresponding vlan unlatching is Layer 2 Multicast pattern, or three layers of multicast pattern, or two or three layers
Mixed pattern, is all to carry out after relevant treatment by multicast message, is forwarded to other by each stacking opening of retransmission unit respectively
On retransmission unit, unlike prior art, retransmission unit side replicate with all outgoing interface quantity identical numbers it is ensured that
Stacking opening between retransmission unit is forwarded in the form of single part of multicast message so as to his retransmission unit passes through the similar forwarding of execution
Mechanism, is finally completed the forwarding operation of multicast message, aforementioned this processing mode, reduces the stacking port band width money of retransmission unit
The consumption in source, and then improve the forwarding success rate of multicast message.
Brief description
Fig. 1 is the forwarding process schematic diagram of existing multicast message；
Fig. 2 is the retransmission method flow chart of multicast message provided in an embodiment of the present invention；
Fig. 3 a is the structural representation of pile system provided in an embodiment of the present invention；
Fig. 3 b is one of forwarding process schematic diagram of multicast message provided in an embodiment of the present invention；
Fig. 3 c is the two of the forwarding process schematic diagram of multicast message provided in an embodiment of the present invention；
Fig. 3 d is the three of the forwarding process schematic diagram of multicast message provided in an embodiment of the present invention；
Fig. 4 is the structure chart of the retransmission unit of multicast message provided in an embodiment of the present invention.
Specific embodiment
With reference to Figure of description, to a kind of retransmission method of multicast message provided in an embodiment of the present invention and device
Specific embodiment illustrates.
A kind of retransmission method of multicast message provided in an embodiment of the present invention, the method can be applicable to forward list including multiple
In the pile system of unit, and each retransmission unit in this system is performed both by following step (as shown in Figure 2):
S21: the first multicast message is received by arbitrary incoming interface；
S22: open mode according to the corresponding vlan of incoming interface and locally default multicast list, judge local outgoing interface
In with the presence or absence of the first multicast message outgoing interface；If so, execution step s23, otherwise, execution step s24；
S23: the first multicast message is passed through respectively corresponding outgoing interface and forward, and carry vlan mark in the first multicast message
Know after forming the second multicast message, pass through each local stacking opening respectively and forward；
Here, above-mentioned vlan mark can be vlan id (vid), be mainly used to indicate and receive the second multicast message
Retransmission unit, determines the follow-up processing mode to the second multicast message according to vid, for example, only the second multicast message is carried out
Layer 2 Multicast is processed, or only the second multicast message is carried out with three layers of process, or first carries out two layers to the second multicast message
Multicast is processed, then carries out three layers of multicasts process；That is, for each retransmission unit, all preserving each self-corresponding
The corresponding relation of the corresponding open mode of wlan of vlan mark, to determine the processing mode of multicast message；
S24: after carrying vlan mark formation the second multicast message in the first multicast message, pass through each local heap respectively
Folded mouth forwards；
S25: instruction receives the current retransmission unit of the second multicast message, executes following step: report according to second group
Vlan mark entrained by literary composition, and locally default multicast list, judge to whether there is second group of report in the outgoing interface of itself
The outgoing interface of literary composition；If so, the second multicast message is reverted to after the first multicast message, pass through corresponding outgoing interface respectively and forward, and
Second multicast message is passed through respectively the stacking opening in addition to receiving the stacking opening of the second multicast message of itself to forward, will again
The secondary retransmission unit receiving the second multicast message, as current retransmission unit, returns the step that current retransmission unit executes, directly
Terminate when determining and itself include a stacking opening to current retransmission unit；Otherwise, the second multicast message is passed through each respectively
Stacking opening in addition to receiving the stacking opening of the second multicast message forward, received the forwarding of the second multicast message again
, as current retransmission unit, the step returning current retransmission unit execution, until current retransmission unit determines itself bag for unit
Terminate when including a stacking opening.
In embodiments of the present invention, above-mentioned retransmission unit may also set up on exchange chip, and now, above-mentioned pile system is
It is made up of multiple exchange chips；May also be disposed on switching equipment, now, above-mentioned pile system is by multiple switching equipment groups
Become；May also be disposed on exchange line card, now, above-mentioned pile system exchanges, by multiple, (the such as case type that line card forms
Switching equipment).
Specifically, in above-mentioned steps s21, for the incoming interface receiving multicast message, it is probably two layers and connects
Mouthful, such as access mouth, trunk mouth etc.；It is also likely to be three layer interfaces, such as svi mouth or route mouth etc., so, for difference
The interface of type, the open mode of generally their also different and, different vlan of corresponding vlan is likely to difference.
In view of the situation, for the retransmission unit receiving multicast message, in order to avoid it as prior art that
Sample, all outgoing interfaces of multicast message all is locally completed to replicate, is leading to forward many parts of multicast messages by certain stacking opening,
Take the more bandwidth resources of stacking opening, in embodiments of the present invention, the unlatching of the corresponding vlan of each interface according to itself
Pattern, and the corresponding multicast list of prior setting, to set the forwarding mechanism of multicast message, thus realizing between retransmission unit
Ensure between stacking opening only to forward a multicast message, and then reduce the consumption of stacking opening bandwidth resources, reach raising group and report
The effect of the forwarding success rate of literary composition.
Specifically, for two layer interfaces on each retransmission unit, the open mode of generally corresponding vlan is two
Layer multicast pattern, at this moment, setting Layer 2 Multicast list item in advance, this Layer 2 Multicast list item specifically includes multicast group address, vlan mark
Know, vlan identifies corresponding interface message (as shown in table 1 below) etc., each multicast group address can correspond to multiple vlan marks, often
Individual vlan identifies and at least includes all local stacking opening marks in corresponding interface message, in order to complete whole multicast message
Forward operation, certainly, each vlan identifies in corresponding interface message and may also include the corresponding local outgoing interface of multicast address
Mark, so, when multicast message is transmitted to other retransmission units by retransmission unit, can carry vlan mark in vlan mark
In, so that other retransmission units identify according to vlan determines subsequent treatment mode.
It should be noted that in above-mentioned Layer 2 Multicast list item, generally also setting up an acquiescence Layer 2 Multicast list item, this table
Vlan in identifies all local stacking opening mark that corresponding interface message also includes retransmission unit, to judge two
Layer multicast list in do not exist multicast message multicast list when use, in this case, retransmission unit be from acquiescence two layers
Local stacking opening is obtained in multicast list.
Table 1
For three layer interfaces on each retransmission unit, the open mode of generally corresponding vlan is three layers of multicast mould
Formula or two or three layers of mixed pattern, when the corresponding open mode of three layer interfaces is three layers of multicast pattern, arrange three layers of group in advance
Broadcast list item, this three layers of multicast lists may particularly include multicast group address, enliven multicast chained list (multicast linked list,
Mll) node identification, mll node identification corresponding vlan mark and interface index, vlan mark and the corresponding interface of interface index
Information etc. (as shown in table 2 below), each mll node identification can correspond to multiple vlan marks with multiple interface indexs (for example
{ device, port }), and each vlan identifies the local outgoing interface only including multicast group address in corresponding interface message.?
In this case, the stacking opening mark of each retransmission unit is stored in being in the interface list of same vlan with three layer interfaces
, in order to receive after multicast message, the stacking opening being flooded in list identifies in corresponding stacking opening.Here,
Under three layers of multicast pattern, the stacking opening of each retransmission unit is to add all vlan, so that other retransmission units can connect
Receive related multicast message.
Table 2
When the open mode of the corresponding vlan of three layer interfaces is two or three layers of mixed pattern, need to arrange in advance Layer 2 Multicast
List item and three layers of multicast list, concrete set-up mode is ibid, different, in this mode, the heap of each retransmission unit
Folded mouth mark is provided in Layer 2 Multicast list item, is not provided with the interface list that floods, here no longer describes in detail one by one.
Further, in above-mentioned steps s22, based on the set-up mode of above-mentioned multicast list, each retransmission unit is concrete
Can judge in local outgoing interface, to whether there is the outgoing interface of the first multicast message by following several ways:
First kind of way, when the open mode of vlan is Layer 2 Multicast pattern, each retransmission unit judges locally to preset
Layer 2 Multicast list item in the presence or absence of the first multicast message Layer 2 Multicast list item, be judged as YES, judging corresponding two layers
Vlan in multicast list identifies whether include outgoing interface mark in corresponding interface message, if so, corresponding goes out to connect by it
Mouth is defined as the outgoing interface of the first multicast message, and here, locally default Layer 2 Multicast list item includes all of locally going out to connect
Mouth mark；
The second way, when the open mode of vlan is three layers of multicast pattern, each retransmission unit judges locally to preset
Three layers of multicast list in the presence or absence of the first multicast message three layers of multicast list, when being judged as YES, judge corresponding three
Whether include in mll node identification corresponding vlan mark in layer multicast list or the corresponding interface message of interface index
Outgoing interface identifies, and if so, its corresponding outgoing interface is defined as the outgoing interface of the first multicast message, here, locally default
Three layers of multicast list include all of local outgoing interface mark；
The third mode, when the open mode of vlan is that two or three layers of multicast use pattern with, each retransmission unit judges this
With the presence or absence of the Layer 2 Multicast list item of the first multicast message in the default Layer 2 Multicast list item in ground, when being judged as YES, it is right to judge
Vlan in the Layer 2 Multicast list item answered identifies whether include outgoing interface mark in corresponding interface message, if so, then by it
Corresponding outgoing interface is defined as the outgoing interface of the first multicast message；And judge locally whether deposit in default three layers of multicast list
In three layers of multicast list of the first multicast message, when being judged as YES, judge the mll node mark in corresponding three layers of multicast list
Know in corresponding vlan mark or the corresponding interface message of interface index and whether include outgoing interface mark, if so, that it is right
The outgoing interface answered is defined as the outgoing interface of the first multicast message.
It should be noted that in the third mode above-mentioned, being that two or three layers of multicast use pattern with the open mode of vlan
In the case of, the outgoing interface of above-mentioned multicast message may include two layers of outgoing interface and three layers of outgoing interface simultaneously, therefore,
Further, in above-mentioned steps s23 or step s24, above-mentioned local stacking opening is actually in following several feelings
Obtain under condition:
The first situation, is Layer 2 Multicast pattern or two or three layers of mixed pattern in the open mode of vlan, and locally presets
Layer 2 Multicast list item in there is the Layer 2 Multicast list item of the first multicast message in the case of, according to corresponding Layer 2 Multicast list item
In vlan identify the local stacking opening mark acquisition that corresponding interface message includes；
Second situation, is Layer 2 Multicast pattern or two or three layers of mixed pattern in the open mode of vlan, and locally presets
Layer 2 Multicast list item in there is not the Layer 2 Multicast list item of the first multicast message in the case of, according to acquiescence Layer 2 Multicast list item
In vlan identify the local stacking opening mark acquisition that corresponding interface message includes；
The third situation, vlan open mode be three layers of multicast pattern when, according to prestore with incoming interface at
Local stacking opening mark in the interface list of same vlan obtains.
Further, in above-mentioned steps s25, each retransmission unit receives second by the instruction of following several ways
The current retransmission unit of multicast message, judges to whether there is the outgoing interface of the second multicast message in the outgoing interface of itself:
First kind of way, each retransmission unit indicates that the open mode that current device identifies corresponding vlan in vlan is two
During layer multicast pattern, the vlan in the Layer 2 Multicast list item of the second multicast message judging locally in default Layer 2 Multicast list item
Identify and in corresponding interface message, whether include outgoing interface mark, if so, then its corresponding outgoing interface is defined as second group
Report the outgoing interface of literary composition, here, default Layer 2 Multicast list item includes the outgoing interface mark of all of current device；
The second way, when the open mode identifying corresponding vlan in vlan is three layers of multicast pattern, opening in vlan
When to open pattern be three layers of multicast pattern, judge locally in default three layers of multicast list with the presence or absence of three layers of the first multicast message
Multicast list, when being judged as YES, judge in corresponding three layers of multicast list to enliven multicast chained list mll node identification corresponding
Whether include outgoing interface mark in vlan mark or the corresponding interface message of interface index, if so, corresponding go out to connect by it
Mouth is defined as the outgoing interface of the second multicast message, and here, default three layers of multicast list include going out of all of current device
Interface identifier；
The third mode, when the open mode of vlan mark is that two or three layers of multicast use pattern with, judges locally default
Whether the vlan in the Layer 2 Multicast list item of the second multicast message in Layer 2 Multicast list item identifies in corresponding interface message and wraps
Include outgoing interface mark, if so, then its corresponding outgoing interface is defined as the outgoing interface of the second multicast message；And judge local
Whether there is three layers of multicast list of the first multicast message in default three layers of multicast list, when being judged as YES, judge to correspond to
Three layers of multicast list in enliven multicast chained list mll node identification corresponding vlan mark or the corresponding interface of interface index
Whether include outgoing interface mark in information, if so, its corresponding outgoing interface is defined as the outgoing interface of the second multicast message.
That is, for the retransmission unit that certain receives the second multicast message, it is according to the second multicast message
In vlan mark, determine vlan identify corresponding vlan current open is any pattern, for example opening two layers of group
In the case of broadcasting pattern, the retransmission unit receiving the second multicast message can directly inquire about this vlan mark in Layer 2 Multicast list item
Whether there is outgoing interface, in the presence of inquiring, just by the vlan in the second multicast message in corresponding interface message
Mark is got rid of, and reverts to the first multicast message, then, by the first multicast message copy as with above-mentioned interface message in go out to connect
Mouthful the same number of number, and forwarding by these outgoing interfaces respectively, meanwhile, according in above-mentioned interface message except reception the
Local stacking opening number outside the stacking opening of two multicast messages, replicates to the second multicast message, and passes through these respectively
Local stacking opening forwards, and executes above-mentioned flow process, by that analogy, Zhi Daojie with the equipment indicating subsequently received second multicast message
The retransmission unit receiving multicast message determines that itself including a stacking opening terminates.
Then, inquire non-existent in the case of it is only necessary to according in above-mentioned interface message remove receive second group report
Local stacking opening number outside the stacking opening of literary composition, is replicated to the second multicast message, and is locally stacked by these respectively
Mouth forwards, and nevertheless indicates that the equipment of subsequently received second multicast message executes above-mentioned flow process, by that analogy, until receiving group
Report civilian retransmission unit and determine and itself include terminating during a stacking opening, in this case, this retransmission unit is come
Say, whether it has executed itself the related procedure of outgoing interface, there is no the stacking opening being capable of forwarding multicasting message, this is just
Mean that multicast message has passed through related outgoing interface forwarding and finished, the forwarding process of therefore multicast message leaves it at that.
It should be noted that in embodiments of the present invention, for each retransmission unit in pile system, receiving
To in the case of multicast message, the only number according to the corresponding local outgoing interface of this multicast message and local stacking opening, to multicast
Message is replicated, the outgoing interface in the corresponding other equipment for this multicast message, does not execute duplication flow process, and,
By multicast message it is ensured that only forwarding one after relevant treatment when local stacking opening is transmitted to other retransmission units
Multicast message, for other retransmission units receiving the multicast message forwarding, the forwarding process of execution is similar to, therewith not
With other retransmission units, in forwarding multicasting message, do not forward to the stacking opening receiving related multicast message, to avoid
Loop in pile system, so, is achieved that heap between each retransmission unit in pile system for the multicast message
Forwarded in the way of single part of multicast message between folded mouth, improve the utilization rate of stacking opening bandwidth resources.
In addition, above-mentioned multicast forward method is not only applicable to linear pile system, it is also applied to annular pile system, answering
During for the latter, need for annular pile system to be split as linear pile system, concrete disassembling machine is made as prior art, and here is not
Describe in detail again.
With reference to following specific embodiments, above-mentioned method for forwarding multicast message is described in detail:
As shown in Figure 3 a it is assumed that pile system includes switch 31, switch 32 and the exchange being provided with retransmission unit
Machine 33, wherein, switch 31 receives a multicast message by incoming interface 1.
Embodiment one
The hypothesis corresponding vlan of incoming interface 1 is vlan1, and the open mode of vlan1 is Layer 2 Multicast pattern；Assume this group
The outgoing interface reporting literary composition is the outgoing interface 3 (as shown in Figure 3 b) on the outgoing interface 1 and switch 33 on switch 31, then, lead to
Cross following flow processs this multicast message is forwarded:
Switch 31, after receiving this multicast message, determines that the open mode of the corresponding vlan1 of access interface 1 is two
Layer multicast pattern, according to the multicast group address of this multicast message, inquires about in locally default Layer 2 Multicast list item, obtains
The corresponding interface message of mark (i.e. outgoing interface 1 and stacking opening 1) of vlan1, at this moment, switch 31 replicates a multicast message,
Forwarded by outgoing interface 1, meanwhile, after multicast message carries the mark of vlan1, forwarded by stacking opening 1.
Next, for receive the switch 32 of multicast message of the mark carrying vlan1 by stacking opening 2,
Carry the mark of vlan1 it is known that vlan1 unlatching is Layer 2 Multicast pattern, in this situation in parsing multicast message
Under, whether there is outgoing interface in the corresponding interface message of mark directly inquiring about vlan1 in locally default Layer 2 Multicast list item
Mark, inquire do not exist when, the multicast message of the mark of vlan1 will be carried, by the stacking opening 3 (mark according to vlan1
Know what the mark of the stacking opening 3 in corresponding interface message obtained) forwarding.
So, receive the switch 33 of the multicast message carrying vlan1 subsequently through stacking opening 4 for, in execution
State the flow process of switch 32 execution, will not be described in detail herein, after execution, draw local exist need forwarding multicasting message go out to connect
Mouth 3, and itself only include a stacking opening 4, now, the mark of the vlan1 in the multicast message receiving is removed, that is, extensive
Answer into the multicast message of the mark not carrying vlan1, and forwarded by outgoing interface 3, complete the forwarding of whole multicast message.
Embodiment two
Assume that incoming interface 1 (such as incoming interface is svi interface) corresponding vlan is vlan1, and the open mode of vlan1 is
Three layers of multicast pattern；The outgoing interface assuming this multicast message is that (corresponding vlan is for svi outgoing interface 3 on switch 31
Vlan2 the svi outgoing interface 4 (as shown in Figure 3 c, the corresponding vlan of svi outgoing interface 4 is vlan2)) and on switch 32, then,
By following flow processs, this multicast message is forwarded:
Switch 31, after receiving this multicast message, determines that the open mode of the corresponding vlan1 of access interface 1 is three
Layer multicast pattern, according to the multicast group address of this multicast message, inquires about in locally default three layers of multicast list, obtains
Svi outgoing interface 3 is one of outgoing interface, and at this moment, switch 31 replicates a multicast message, is forwarded by svi outgoing interface 3,
Meanwhile, multicast message is flooded in vlan1, be flooded to stacking opening 1, vlan1 is carried in multicast message by stacking opening 1
Mark after forward.
Next, for receive the switch 32 of multicast message of the mark carrying vlan1 by stacking opening 2,
Carry the mark of vlan1 it is known that vlan1 unlatching is three layers of multicast pattern, in this situation in parsing multicast message
Under, locally default three layers of multicast list show that svi outgoing interface 4 is one of outgoing interface for inquiry, and at this moment, switch 32 replicates
The multicast message that portion receives, then, the mark of the vlan1 in the multicast message of duplication is removed, that is, reverts to and do not carry
The multicast message of the mark of vlan1, and forwarded by svi outgoing interface 4, meanwhile, by the multicast message receiving in vlan1
Inside flood, be flooded to stacking opening 3, forwarded by stacking opening 3.
So, for the switch 33 of the multicast message receiving the mark carrying vlan1 subsequently through stacking opening 4,
Execute the flow process of above-mentioned switch 32 execution, will not be described in detail herein, after execution, drawing locally not existing needs forwarding multicasting report
The outgoing interface of literary composition, and itself only include a stacking opening 4, now, no longer multicast message is flooded, complete whole multicast
The forwarding of message.
Embodiment three
Assume that incoming interface 1 (such as incoming interface is svi interface) corresponding vlan is vlan1, and the open mode of vlan1 is
Two or three layers of mixed multicast pattern；Assume this multicast message outgoing interface be switch 31 on two layers of outgoing interface 5 and svi outgoing interface
6 (corresponding vlan is vlan2), and svi outgoing interface 7 (as shown in Figure 3 d, the corresponding vlan of svi outgoing interface 7 on switch 32
For vlan2), then, by following flow processs, this multicast message is forwarded:
Switch 31, after receiving this multicast message, determines that the open mode of the corresponding vlan1 of access interface 1 is two
Three layers of mixed multicast pattern, first the multicast group address according to this multicast message, looks in locally default Layer 2 Multicast list item
Ask, obtain the corresponding interface message of mark (including two layers of outgoing interface 5 and stacking opening 1) of vlan1；Then, further according to this
The multicast group address of multicast message, inquires about in locally default three layers of multicast list, show that svi outgoing interface 6 is one of
Outgoing interface, at this moment, switch 31 replicates 2 parts of multicast messages, passes through two layers of outgoing interface 5 respectively and svi outgoing interface 6 forwards, with this
Meanwhile, after carrying the mark of vlan1 in multicast message, forwarded by stacking opening 1.
Next, for the multicast message receiving the mark carrying vlan1 by stacking opening 2 switch 32
Say, carry the mark of vlan1 in parsing multicast message it is known that vlan1 unlatching is two or three layers of multicast pattern, this
In the case of, whether have to connect in the corresponding interface message of mark first inquiring about vlan1 in locally default Layer 2 Multicast list item
Mouthful mark, inquire do not exist when, then inquire about locally default three layers of multicast list, show that svi outgoing interface 7 is one of
Outgoing interface, at this moment, replicates the multicast message that portion receives, then, the mark of the vlan1 in the multicast message of duplication is gone
Fall, that is, revert to the multicast message of the mark not carrying vlan1, and forwarded by svi outgoing interface 7, meanwhile, will receive
Multicast message turned by stacking opening 3 (being obtained according to the mark identifying the stacking opening 3 in corresponding interface message of vlan1)
Send out.
So, receive the switch 33 of the multicast message carrying vlan1 subsequently through stacking opening 4 for, in execution
State the flow process of switch 32 execution, will not be described in detail herein, after execution, drawing locally not existing needs going out of forwarding multicasting message
Interface, and itself only include a stacking opening 4, complete the forwarding of whole multicast message.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of retransmission unit of multicast message, due to this dress
The principle putting institute's solve problem is similar to the retransmission method of aforementioned multicast message, and the enforcement of therefore this device may refer to aforementioned side
The enforcement of method, repeats no more in place of repetition.
A kind of retransmission unit of multicast message provided in an embodiment of the present invention, is applied to the stacking system including this device multiple
In system, as shown in figure 4, this device specifically includes:
Receiver module 41, for receiving the first multicast message by arbitrary incoming interface；
Judge module 42, for the default multicast list of the open mode according to the corresponding vlan of incoming interface and device,
Judge in local outgoing interface, to whether there is the outgoing interface of the first multicast message；
Forwarding module 43, when being judged as NO for judge module 42, carries vlan mark in the first multicast message and is formed
After second multicast message, pass through each local stacking opening respectively and forward；
Indicating module 44, for, after forwarding module forwards the second multicast message, instruction receives the second multicast message
Present apparatus, execute following step: the vlan mark according to entrained by the second multicast message, and locally default multicast list,
Judge in the outgoing interface of itself, to whether there is the outgoing interface of the second multicast message；If so, the second multicast message is reverted to first
After multicast message, pass through corresponding outgoing interface respectively and forward, and the second multicast message is passed through respectively itself except receiving second
Stacking opening outside the stacking opening of multicast message forwards, the device being received the second multicast message again as present apparatus,
The step returning present apparatus execution, terminates when present apparatus are determined and itself included a stacking opening；Otherwise, by second
Multicast message is forwarded by respective stacking opening in addition to receiving the stacking opening of the second multicast message respectively, will receive again
The step executing as present apparatus, return present apparatus to the device of the second multicast message, comes from until present apparatus determine
Body includes terminating during a stacking opening.
Preferably, above-mentioned forwarding module 43, is additionally operable to judge to exist first group in local outgoing interface in judge module 42
When reporting civilian outgoing interface, the first multicast message is passed through respectively corresponding outgoing interface and forward, and carry in the first multicast message
After vlan mark forms the second multicast message, pass through each local stacking opening respectively and forward, the step of execution indicating module 44 execution
Suddenly.
Preferably, above-mentioned judge module 42, specifically for when the open mode of vlan is Layer 2 Multicast pattern, judging dress
Whether there is the Layer 2 Multicast list item of the first multicast message in the default Layer 2 Multicast list item put, when being judged as YES, judge
Vlan in corresponding Layer 2 Multicast list item identifies whether include outgoing interface mark in corresponding interface message, and it is corresponding
Outgoing interface is defined as the outgoing interface of the first multicast message；When the open mode of vlan is three layers of multicast pattern, judgment means
Whether there is three layers of multicast list of the first multicast message in default three layers of multicast list, when being judged as YES, judge to correspond to
Three layers of multicast list in mll node identification corresponding vlan mark or the corresponding interface message of interface index in whether wrap
When having included outgoing interface mark, its corresponding outgoing interface is defined as the outgoing interface of the first multicast message；And the unlatching in vlan
When pattern is that two or three layers of multicast use pattern with, judge locally in default Layer 2 Multicast list item with the presence or absence of the first multicast message
Layer 2 Multicast list item, when being judged as YES, judges that the vlan in corresponding Layer 2 Multicast list item identifies in corresponding interface message
Whether include outgoing interface mark, if so, then its corresponding outgoing interface is defined as the outgoing interface of the first multicast message；And sentence
With the presence or absence of three layers of multicast list of the first multicast message in disconnected locally default three layers of multicast list, when being judged as YES, sentence
In mll node identification corresponding vlan mark or the corresponding interface message of interface index broken in corresponding three layers of multicast list
Whether include outgoing interface mark, if so, its corresponding outgoing interface is defined as the outgoing interface of the first multicast message.
Here, the default Layer 2 Multicast list item of said apparatus includes all of local outgoing interface mark, said apparatus
Default three layers of multicast list include all of local outgoing interface mark.
Preferably, the local stacking opening that the second multicast message is forwarded by above-mentioned forwarding module 43, is the unlatching mould in vlan
Formula is there is the first multicast message in Layer 2 Multicast pattern or two or three layers of mixed pattern, and default Layer 2 Multicast list item two layers
During multicast list, the local stacking opening that corresponding interface message includes is identified according to the vlan in corresponding Layer 2 Multicast list item
Mark obtains；Default Layer 2 Multicast list item does not exist the first multicast message Layer 2 Multicast list item when, according to acquiescence two
Vlan in layer multicast list identifies the local stacking opening mark acquisition that corresponding interface message includes；And opening in vlan
When to open pattern be three layers of multicast pattern, according to prestoring the local heap being in the interface list of same vlan with incoming interface
Folded mouth mark obtains.
Preferably, above-mentioned indicating module 44, identifies the unlatching of corresponding vlan specifically for instruction current device in vlan
When pattern is Layer 2 Multicast pattern, the Layer 2 Multicast list item of the second multicast message judging locally in default Layer 2 Multicast list item
In vlan identify in corresponding interface message, whether to include outgoing interface mark, if so, then its corresponding outgoing interface is determined
Outgoing interface for the second multicast message；When the open mode identifying corresponding vlan in vlan is three layers of multicast pattern, in vlan
Open mode when being three layers of multicast pattern, judge locally in default three layers of multicast list with the presence or absence of the first multicast message
Three layers of multicast list, when being judged as YES, judge to enliven multicast chained list mll node identification pair in corresponding three layers of multicast list
Outgoing interface mark whether is included in the vlan mark answered or the corresponding interface message of interface index, if so, that it is corresponding
Outgoing interface is defined as the outgoing interface of the second multicast message；And be that two or three layers of multicast use pattern with the open mode of vlan mark
When, the vlan mark in the Layer 2 Multicast list item of the second multicast message judging locally in default Layer 2 Multicast list item is corresponding
Whether include outgoing interface mark in interface message, if so, then its corresponding outgoing interface is defined as going out of the second multicast message
Interface；And judge locally in default three layers of multicast list with the presence or absence of three layers of multicast list of the first multicast message, sentencing
When breaking as being, judge in corresponding three layers of multicast list enliven multicast chained list mll node identification corresponding vlan mark or
Whether include outgoing interface mark in the corresponding interface message of interface index, if so, its corresponding outgoing interface is defined as second
The outgoing interface of multicast message, the outgoing interface that default Layer 2 Multicast list item includes all of current device identifies, and default three
Layer multicast list includes the outgoing interface mark of all of current device.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprise these changes and modification.
Claims (8)
1. a kind of retransmission method of multicast message is it is characterised in that the method is applied to the stacking system including multiple retransmission units
In system, each retransmission unit in described pile system is performed both by following step:
First multicast message is received by arbitrary incoming interface, and the unlatching according to described incoming interface corresponding VLAN vlan
Pattern and locally default multicast list, judge to whether there is the outgoing interface of described first multicast message in local outgoing interface；
When being judged as NO, after described first multicast message carries described vlan mark formation the second multicast message, respectively
Forwarded by each local stacking opening, instruction receives the current retransmission unit of the second multicast message, execute following step: according to
Vlan mark entrained by described second multicast message, and locally default multicast list, whether judge in the outgoing interface of itself
There is the outgoing interface of described second multicast message；If so, described second multicast message is reverted to after described first multicast message,
Pass through corresponding outgoing interface respectively to forward, and described second multicast message is passed through respectively itself except receiving the second multicast message
Stacking opening outside stacking opening forward, received again the retransmission unit of the second multicast message as described current forward single
Unit, the step returning described current retransmission unit execution, determine until described current retransmission unit and itself include a stacking
Terminate during mouth；Otherwise, by described second multicast message respectively by respective except receive the second multicast message stacking opening it
Outer stacking opening forwards, and the retransmission unit being received the second multicast message again, as described current retransmission unit, returns institute
The step stating current retransmission unit execution, terminates when described current retransmission unit is determined and itself included a stacking opening；
Each retransmission unit described also executes following step:
Exist in judging local outgoing interface described first multicast message outgoing interface when, by described first multicast message respectively
Forwarded by corresponding outgoing interface, and carry after described vlan mark forms the second multicast message in described first multicast message,
Pass through each local stacking opening respectively to forward, instruction receives the current retransmission unit of the second multicast message, execution following step:
Vlan mark according to entrained by described second multicast message, and locally default multicast list, judge itself go out to connect
With the presence or absence of the outgoing interface of described second multicast message in mouthful；If so, described second multicast message is reverted to described first group
After reporting literary composition, pass through corresponding outgoing interface respectively and forward, and described second multicast message is passed through respectively itself except receiving the
Stacking opening outside the stacking opening of two multicast messages forwards, the step returning described current retransmission unit execution, works as until described
Front retransmission unit is determined and itself is included terminating during a stacking opening；Otherwise, described second multicast message is passed through each respectively
Stacking opening in addition to receiving the stacking opening of the second multicast message forward, return the step of described current retransmission unit execution
Suddenly, terminate when described current retransmission unit is determined and itself included a stacking opening.
2. the method for claim 1, it is characterised in that each retransmission unit described passes through following manner, judges local
With the presence or absence of the outgoing interface of described first multicast message in outgoing interface:
When the open mode of described vlan is Layer 2 Multicast pattern, each retransmission unit judges locally default Layer 2 Multicast table
With the presence or absence of the Layer 2 Multicast list item of described first multicast message in, when being judged as YES, judge corresponding Layer 2 Multicast table
Vlan in identifies whether include outgoing interface mark in corresponding interface message, if so, then will be true for its corresponding outgoing interface
It is set to the outgoing interface of described first multicast message, described default Layer 2 Multicast list item includes all of local outgoing interface mark；
When the open mode of described vlan is three layers of multicast pattern, each retransmission unit judges locally default three layers of multicast table
With the presence or absence of three layers of multicast list of described first multicast message in, when being judged as YES, judge corresponding three layers of multicast table
Whether enlivening in multicast chained list mll node identification corresponding vlan mark or the corresponding interface message of interface index in wraps
Include outgoing interface mark, if so, its corresponding outgoing interface is defined as the outgoing interface of described first multicast message, described default
Three layers of multicast list include all of local outgoing interface mark；
When the open mode of described vlan is that two or three layers of multicast use pattern with, each retransmission unit judges locally default two layers
Whether there is the Layer 2 Multicast list item of described first multicast message in multicast list, when being judged as YES, judge corresponding two layers
Vlan in multicast list identifies whether include outgoing interface mark in corresponding interface message, if so, then by its corresponding go out
Interface is defined as the outgoing interface of described first multicast message；And judge locally to whether there is in default three layers of multicast list institute
State three layers of multicast list of the first multicast message, when being judged as YES, judge the mll node mark in corresponding three layers of multicast list
Know in corresponding vlan mark or the corresponding interface message of interface index and whether include outgoing interface mark, if so, that it is right
The outgoing interface answered is defined as the outgoing interface of described first multicast message.
3. method as claimed in claim 2 is it is characterised in that each retransmission unit described obtains local heap by following manner
Folded mouth:
It is Layer 2 Multicast pattern or two or three layers of mixed pattern in the open mode of described vlan, and described default Layer 2 Multicast table
In exist described first multicast message Layer 2 Multicast list item when, according in corresponding Layer 2 Multicast list item vlan mark right
The local stacking opening mark that the interface message answered includes obtains；Do not have described in described default Layer 2 Multicast list item
During the Layer 2 Multicast list item of one multicast message, identified in corresponding interface message according to the vlan in acquiescence Layer 2 Multicast list item and wrap
The local stacking opening mark including obtains；
Described vlan open mode be three layers of multicast pattern when, according to prestore with described incoming interface be in same
Local stacking opening mark in the interface list of vlan obtains.
4. the method for claim 1 is it is characterised in that the instruction of each retransmission unit receives working as of the second multicast message
Front retransmission unit, the vlan mark according to entrained by described second multicast message, and locally default multicast list, judge itself
Outgoing interface in the presence or absence of described second multicast message outgoing interface, specifically include:
Each retransmission unit indicates that the open mode that described current device identifies corresponding vlan in described vlan is Layer 2 Multicast
During pattern, described in the Layer 2 Multicast list item of described second multicast message judging locally in default Layer 2 Multicast list item
Vlan identifies whether include outgoing interface mark in corresponding interface message, if so, then its corresponding outgoing interface is defined as institute
State the outgoing interface of the second multicast message, described default Layer 2 Multicast list item includes the outgoing interface mark of all of current device
Know；
When the open mode identifying corresponding vlan in described vlan is three layers of multicast pattern, in the open mode of described vlan it is
During three layers of multicast pattern, judge locally in default three layers of multicast list with the presence or absence of three layers of multicast of described first multicast message
List item, when being judged as YES, judges to enliven the corresponding vlan of multicast chained list mll node identification in corresponding three layers of multicast list
Outgoing interface mark whether is included in mark or the corresponding interface message of interface index, if so, will be true for its corresponding outgoing interface
It is set to the outgoing interface of described second multicast message, described default three layers of multicast list include the outgoing interface of all of current device
Mark；
When the open mode of described vlan mark is that two or three layers of multicast use pattern with, judge locally default Layer 2 Multicast list item
In the Layer 2 Multicast list item of described second multicast message in described vlan identify in corresponding interface message and whether include
Outgoing interface identifies, and if so, its corresponding outgoing interface is then defined as the outgoing interface of described second multicast message；And judge local
Whether there is three layers of multicast list of described first multicast message in default three layers of multicast list, when being judged as YES, judge
The corresponding vlan of multicast chained list mll node identification identifies enlivening in corresponding three layers of multicast list or interface index is corresponding
Whether include outgoing interface mark in interface message, if so, its corresponding outgoing interface is defined as described second multicast message
Outgoing interface.
5. a kind of retransmission unit of multicast message is it is characterised in that described device is applied to the stacking including multiple described devices
In system, described device includes:
Receiver module, for receiving the first multicast message by arbitrary incoming interface；
Judge module, default for the open mode according to described incoming interface corresponding VLAN vlan and described device
Multicast list, judge in local outgoing interface whether there is described first multicast message outgoing interface；
Forwarding module, for when described judge module is judged as NO, carrying described vlan mark in described first multicast message
Know after forming the second multicast message, pass through each local stacking opening respectively and forward；
Indicating module, for, after described forwarding module forwards described second multicast message, instruction receives the second multicast message
Present apparatus, execute following step: the vlan mark according to entrained by described second multicast message, and locally default multicast
List item, judges to whether there is the outgoing interface of described second multicast message in the outgoing interface of itself；If so, described second group is reported
After literary composition reverts to described first multicast message, pass through corresponding outgoing interface respectively and forward, and described second multicast message is led to respectively
Cross the stacking opening in addition to receiving the stacking opening of the second multicast message of itself to forward, the second multicast message will be received again
Device as described present apparatus, the step that returns described present apparatus execution, until described present apparatus determine itself
Terminate during including a stacking opening；Otherwise, by described second multicast message respectively by respective except receiving second group of report
Stacking opening outside the stacking opening of literary composition forwards, and the device being received the second multicast message again, as described present apparatus, returns
The step returning described present apparatus execution, terminates when described present apparatus are determined and itself included a stacking opening；
Described forwarding module, is additionally operable to judge there is described first multicast message in local outgoing interface in described judge module
During outgoing interface, described first multicast message is passed through respectively corresponding outgoing interface and forward, and carry in described first multicast message
After described vlan mark forms the second multicast message, pass through each local stacking opening respectively and forward, execute described indicating module and hold
The step of row.
6. device as claimed in claim 5 is it is characterised in that described judge module, specifically for the unlatching in described vlan
When pattern is Layer 2 Multicast pattern, judge in the default Layer 2 Multicast list item of described device, to whether there is described first group of report
The Layer 2 Multicast list item of literary composition, when being judged as YES, judges the vlan mark corresponding interface letter in corresponding Layer 2 Multicast list item
Whether include outgoing interface mark in breath, its corresponding outgoing interface is defined as the outgoing interface of described first multicast message；Institute
When the open mode stating vlan is for three layers of multicast pattern, judge to whether there is institute in default three layers of multicast list of described device
State three layers of multicast list of the first multicast message, when being judged as YES, judge to enliven multicast in corresponding three layers of multicast list
Outgoing interface mark whether is included in chained list mll node identification corresponding vlan mark or the corresponding interface message of interface index
When, its corresponding outgoing interface is defined as the outgoing interface of described first multicast message；And in the open mode of described vlan be
When two or three layers of multicast use pattern with, judge locally in default Layer 2 Multicast list item with the presence or absence of the two of described first multicast message
Layer multicast list, when being judged as YES, judging that the vlan in corresponding Layer 2 Multicast list item identifies in corresponding interface message is
The no outgoing interface that includes identifies, and if so, its corresponding outgoing interface is then defined as the outgoing interface of described first multicast message；And
Judge locally in default three layers of multicast list with the presence or absence of three layers of multicast list of described first multicast message, be judged as YES
When, judge mll node identification corresponding vlan mark or the corresponding interface of interface index in corresponding three layers of multicast list
Whether include in information outgoing interface mark, if so, by its corresponding outgoing interface be defined as described first multicast message go out to connect
Mouthful, the default Layer 2 Multicast list item of described device includes all of local outgoing interface and identifies, default three layers of described device
Multicast list includes all of local outgoing interface mark.
7. device as claimed in claim 6 it is characterised in that described forwarding module by described second multicast message forward basis
Ground stacking opening, is to be Layer 2 Multicast pattern or two or three layers of mixed pattern in the open mode of described vlan, and described default two
Layer multicast list in exist described first multicast message Layer 2 Multicast list item when, according in corresponding Layer 2 Multicast list item
Vlan identifies the local stacking opening mark acquisition that corresponding interface message includes；In described default Layer 2 Multicast list item not
Exist described first multicast message Layer 2 Multicast list item when, corresponding connect according to the vlan mark in acquiescence Layer 2 Multicast list item
The local stacking opening mark that message breath includes obtains；And when the open mode of described vlan is three layers of multicast pattern, root
Obtain according to prestoring the local stacking opening mark being in the interface list of same vlan with described incoming interface.
8. device as claimed in claim 5 is it is characterised in that described indicating module, specifically for indicating described current device
When the open mode identifying corresponding vlan in described vlan is Layer 2 Multicast pattern, judge locally default Layer 2 Multicast list item
In the Layer 2 Multicast list item of described second multicast message in described vlan identify in corresponding interface message and whether include
Outgoing interface identifies, and if so, its corresponding outgoing interface is then defined as the outgoing interface of described second multicast message；In described vlan mark
When the open mode knowing corresponding vlan is for three layers of multicast pattern, when the open mode of described vlan is three layers of multicast pattern,
Judge locally in default three layers of multicast list with the presence or absence of three layers of multicast list of described first multicast message, be judged as YES
When, judge that the corresponding vlan of multicast chained list mll node identification that enlivens in corresponding three layers of multicast list identifies or interface rope
Draw and in corresponding interface message, whether include outgoing interface mark, if so, its corresponding outgoing interface is defined as described second group
Report the outgoing interface of literary composition；And when the open mode of described vlan mark is that two or three layers of multicast use pattern with, judge locally pre-
If Layer 2 Multicast list item in the Layer 2 Multicast list item of described second multicast message in described vlan identify corresponding interface
Whether include outgoing interface mark in information, if so, then its corresponding outgoing interface is defined as going out of described second multicast message
Interface；And judge locally in default three layers of multicast list with the presence or absence of three layers of multicast list of described first multicast message,
When being judged as YES, judge that the corresponding vlan of multicast chained list mll node identification that enlivens in corresponding three layers of multicast list identifies
Or whether include outgoing interface mark in the corresponding interface message of interface index, if so, its corresponding outgoing interface is defined as
The outgoing interface of described second multicast message, described default Layer 2 Multicast list item includes the outgoing interface mark of all of current device
Know, described default three layers of multicast list include the outgoing interface mark of all of current device.
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| CN105763446B (en) * | 2016-03-25 | 2019-05-07 | 新华三技术有限公司 | A kind of link-state information processing method and processing device |
| CN106411730B (en) * | 2016-10-26 | 2019-11-12 | 新华三技术有限公司 | A kind of message forwarding method and device |
| CN108809836B (en) * | 2018-05-31 | 2020-02-18 | 新华三技术有限公司 | Multicast data message forwarding method and device |
| CN110061922B (en) * | 2019-04-30 | 2021-06-11 | 新华三技术有限公司 | Message forwarding method and device |
| CN110445678B (en) * | 2019-07-26 | 2021-02-09 | 新华三大数据技术有限公司 | Multicast network detection method, device and forwarding equipment |
| CN111010343B (en) * | 2019-12-18 | 2022-01-11 | 锐捷网络股份有限公司 | Method, device, network equipment and storage medium for forwarding multicast message |
| CN111262713B (en) * | 2020-01-03 | 2022-07-08 | 优刻得科技股份有限公司 | Message multicast processing method, processing device, readable medium and system |
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