CN102244583B - Method and network equipment for forwarding multicast streaming - Google Patents
Method and network equipment for forwarding multicast streaming Download PDFInfo
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Abstract
The invention provides a method and network equipment for forwarding multicast streaming. The method comprises the following steps that: an upstream multicast streaming inflow virtual local area network (VLAN) and a downstream multicast streaming receiving VLAN of the network equipment are configured; when the network equipment receives a multicast joining request message, sent by a user of the downstream multicast streaming VLAN, from a port of the downstream multicast streaming receiving VLAN, the network equipment builds a multicast forwarding table entry according to the multicast joining request message and the port, wherein the multicast joining request message carries a VLAN identification which is used for identifying the VLAN of the user and a multicast group identification which is requested by the user, and the multicast forwarding table entry comprises the VLAN identification of the user, the port and the multicast group identification; and the network equipment receives the multicast streaming which is sent by a multicast streaming inflow VLAN and is corresponding to the multicast group identification, and the network equipment forwards the multicast streaming to the VLAN of the user according to the multicast forwarding table entry. The method and network equipment provided by the invention can realize accurate forwarding of the multicast streaming.
Description
Technical field
The present invention relates to the network communications technology, relate in particular to a kind of multicast flow forwarding method and the network equipment.
Background technology
Super VLAN (Super Virtual Local Area Network, Super VLAN) is a kind of mode that VLAN divides, and is the administrative skill of a kind of special optimization IP address.Its principle is that the IP of a network segment is given to different Sub-VLAN (Sub VLAN), and each Sub VLAN is broadcast domain independently, and two layers of isolation mutually between different Sub VLAN.In the time that the user in Sub VLAN need to carry out three layers of communication, using the IP address of the virtual interface of use Super VLAN as gateway address, multiple like this VLAN share an IP address, thereby have saved IP address resource.Super VLAN is used widely because of its beneficial effect.
When carry out multicast data flow forwarding on Super VLAN time, when receiving the multicast member message that joins request on the physical interface belonging on Sub VLAN, on the multicast member Interface realization of each Sub VLAN, spy upon the mode reception & disposal multicast member message that joins request by Layer 2 Multicast, and the multicast member interface mode that is converted into Super VLAN is articulated in Super VLAN, thereby realize in the time having multicast member to need this part of multicast data flow in certain Sub VLAN, be the multicast member of the Super VLAN message upstream application multicast data flow that joins request the multicast member of the Sub VLAN message transformation that joins request.When multicast data flow issues from Super VLAN, then be transmitted to all Sub VLAN according to the characteristic of Super VLAN.
When carry out in the manner described above multicast data flow forwarding in Super VLAN time, owing to just simply the member interface in Sub VLAN being converted into the member interface of Super VLAN, the information of recording in multicast forwarding list item is only Super vlan port information, be that whole multicast forwarding list item still hangs on Super VLAN, so in the time that certain physical interface of Super VLAN belongs to multiple Sub VLAN simultaneously, carrying out just cannot knowing multicast data flow is specifically issued to which the Sub VLAN under this physical interface when multicast data flow issues.
In the network architecture being formed by multiple Common VLAN, may there are too the problems referred to above, that is: in the time that multiple VLAN share a port, at the concrete VLAN that carries out cannot distinguishing when multicast data flow forwards request multicast data flow, now multicast data flow will be forwarded in the whole VLAN that connect by this physical interface, cannot realize the precise relay of multicast data flow.
Summary of the invention
For above-mentioned defect, the invention provides a kind of multicast flow forwarding method and the network equipment, for realizing the precise relay of multicast data flow.
According to an aspect of the present invention, provide a kind of multicast flow forwarding method, comprising:
The upstream multicast of configure network devices flows into VLAN and downstream multicast data flow receives VLAN;
When the described network equipment receives multicast that user that the port of VLAN receives downstream multicast data flow VLAN sends and joins request message from described downstream multicast data flow, set up multicast forwarding list item according to join request message and described port of described multicast, wherein, the described multicast message that joins request carries the multicast identifier that user vlan for identifying described user place VLAN mark and described user ask, and described multicast forwarding list item comprises that described user vlan identifies, described port and described multicast identifier;
The described network equipment receives described multicast and flows into the multicast data flow corresponding with described multicast identifier that VLAN issues, and according to described multicast forwarding list item, described multicast data flow is forwarded to user place VLAN.
According to a further aspect in the invention, also provide a kind of network equipment, comprising:
Configuration module, for configuring, upstream multicast flows into VLAN and downstream multicast data flow receives VLAN;
Multicast forwarding list item is set up module, when join request message for receive the multicast of user's transmission of downstream multicast data flow VLAN from the port of described downstream multicast data flow reception VLAN, set up multicast forwarding list item according to join request message and described port of described multicast, wherein, the described multicast message that joins request carries the multicast identifier that user vlan for identifying described user place VLAN mark and described user ask, and described multicast forwarding list item comprises that described user vlan identifies, described port and described multicast identifier;
Multicast data flow forwarding module, flows into for receiving described multicast the multicast data flow corresponding with described multicast identifier that VLAN issues, and according to described multicast forwarding list item, described multicast data flow is forwarded to user place VLAN.
According to multicast flow forwarding method of the present invention and the network equipment, the multicast sending according to user due to the network equipment message generation that joins request comprises the multicast forwarding list item of user vlan mark, multicast identifier and port information, so while being the shared port of multiple VLAN in convenient network, the network equipment still can will receive multicast data flow precise relay to the VLAN that asks this multicast data flow, overcome and in prior art, be directed to this network architecture, needed multicast data flow is sent to all VLAN under this port and the defect that causes network resources waste simultaneously.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of the multicast flow forwarding method of the embodiment of the present invention one.
Fig. 2 is the network architecture diagram of the multicast flow forwarding method of the application embodiment of the present invention one.
Fig. 3 is the network architecture diagram of the multicast flow forwarding method of the application embodiment of the present invention two.
Fig. 4 is the network architecture diagram of the multicast flow forwarding method of the application embodiment of the present invention four.
Fig. 5 is the structural representation of the network equipment of the embodiment of the present invention six.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-
Fig. 1 is the schematic flow sheet of the multicast flow forwarding method of the embodiment of the present invention one.As shown in Figure 1, this multicast flow forwarding method comprises the following steps:
Step S101, the upstream multicast of configure network devices flows into VLAN and downstream multicast data flow receives VLAN;
Step S102, when the described network equipment receives multicast that user that the port of VLAN receives downstream multicast data flow VLAN sends and joins request message from described downstream multicast data flow, set up multicast forwarding list item according to join request message and described port of described multicast, wherein, the described multicast message that joins request carries the multicast identifier that user vlan for identifying described user place VLAN mark and described user ask, and described multicast forwarding list item comprises that described user vlan identifies, described port and described multicast identifier;
Step S103, the described network equipment receives described multicast and flows into the multicast data flow corresponding with described multicast identifier that VLAN issues, and according to described multicast forwarding list item, described multicast data flow is forwarded to user place VLAN.
Fig. 2 is the network architecture diagram of the multicast flow forwarding method of the application embodiment of the present invention one.Below in conjunction with Fig. 2, above-mentioned steps S101～S103 is elaborated.
As shown in Figure 2, in this network, switch SWITCH has the first port Port1, the second port Port2, the 3rd port Port3 and the 4th port Port4.Wherein, the first port Port1 belongs to the first virtual LAN VLAN 1, the second port Port2 belongs to the second virtual LAN VLAN 2 and the 3rd virtual LAN VLAN 3, the three port Port3 simultaneously and belongs to the 4th virtual LAN VLAN 4, the four port Port3 and belong to the 5th virtual LAN VLAN 5.
By the VLAN being connected with network side router, i.e. the 5th virtual LAN VLAN 5, is set to upstream multicast and flows into VLAN, and the multicast source that upstream equipment sends is all forwarded to switch SWITCH with the form of VLAN5; And by the VLAN being connected with user's side, the first virtual LAN VLAN 1, the second virtual LAN VLAN 2, the 3rd virtual LAN VLAN 3 and the 4th virtual LAN VLAN 4 are set to downstream multicast data flow and receive VLAN.
In the time that the user in the first virtual LAN VLAN 1, the second virtual LAN VLAN 2, the 3rd virtual LAN VLAN 3 or the 4th virtual LAN VLAN 4 thinks a certain multicast data flow of request receiving, the port of the VLAN by self place sends the multicast message that joins request to switch SWITCH, and in this multicast joins request message, carries the multicast identifier (multicast group id) of multicast data flow that user asks and the identification information (being user vlan ID) of the VLAN at self place.It is the multicast data flow of 239.1.1.1 that for example user of the second virtual LAN VLAN 2 asks multicast group id, and the multicast that this user sends to switch SWITCH by the second port Port2 joins request, and message should carry multicast group id 239.1.1.1 and user vlan identifies VLAN2.
Switch SWITCH is according to snoop protocol, for example multicast listener discovery agreement is spied upon (Intemet Group Management Protocol Snooping, IGMP Snooping), receiving multicast from the second port Port2 joins request message, set up multicast forwarding list item, this multicast forwarding list item comprises this multicast entrained multicast group id 239.1.1.1 of message and user vlan mark VLAN2 that joins request, and also comprises the second port Port2 for receiving this request.And this multicast message that joins request is forwarded to Multicast Routing interface by switch SWITCH, the 4th port Port4 sends.
In the time that switch SWITCH receives the multicast source that the 5th virtual LAN VLAN 5 forwards by the 4th port Port4, at the corresponding multicast forwarding list item of multicast group id of local search and described multicast source, for example, when this multicast group id is 239.1.1.1, switch SWITCH inquires the multicast forwarding list item that comprises 239.1.1.1, VLAN2 and the second port Port2, and switch SWITCH is sent to the second virtual LAN VLAN 2 by this multicast data flow by the second port Port2.
According to the multicast flow forwarding method of above-described embodiment, the multicast sending according to user due to the network equipment message generation that joins request comprises user vlan mark, the multicast forwarding list item of multicast identifier and port information, so while being the shared port of multiple VLAN in convenient network, for example the second virtual LAN VLAN 2 in Fig. 2 and the 3rd virtual LAN VLAN 3 share the second port Port2, the network equipment still can will receive multicast data flow precise relay to the VLAN that asks this multicast data flow, overcome and in prior art, be directed to this network architecture, the defect that needs simultaneously multicast data flow to be sent to all VLAN under this port and cause network resources waste.
Embodiment bis-
On the basis of the multicast flow forwarding method of above-described embodiment one, downstream multicast data flow receives the multiple sub-VLAN Sub VLAN that VLAN comprises super VLAN Super VLAN; Correspondingly, the described multicast entrained described user vlan of message that joins request is designated the user Sub VLAN mark of the Sub VLAN for identifying described user place, and described multicast forwarding list item comprises described user Sub VLAN mark, described port and described multicast identifier.
Fig. 3 is the network architecture diagram of the multicast flow forwarding method of the application embodiment of the present invention two.In the network shown in Fig. 3, Super VLAN comprises two Sub VLAN, i.e. Sub VLAN1 and Sub VLAN2.Wherein, IGMP Snooping function is open on the Sub VLAN1 of Super VLAN, and independent role is in Sub VLAN1; Multicast forwarding list item is based upon on Sub VLAN1, and the entrance of multicast traffic stream, be that Multicast Routing interface (the 3rd port Port3) belongs to Sub VLAN1, in the time that the Sub of Super VLAN VLAN2 has multicast data flow, can in whole VLAN, broadcast so.Conventionally, this application be in the time of the network planning clearly in current network, only the Sub VLAN1 of Super VLAN has the demand of multicast data flow, for example specify in the network of a certain enterprises, only some rooms are for holding video conference, there is multicast data flow demand in the affiliated Sub VLAN in this room only, now can on the Sub VLAN under this room, open IGMP Snooping function, for realizing the intercommunicating network equipment of Sub VLAN, for example switch SWITCH, can resolve join request message set up multicast forwarding list item of multicast.
Particularly, when apply the multicast flow forwarding method of above-described embodiment in the network architecture shown in Fig. 3 time, when the user of Sub VLAN1 for example joins request message by the second port Port2 to SWITCH transmission multicast, in joining request message, carries this multicast the multicast group id of mark with the multicast data flow of asking of Sub VLAN1.When the second port Port2 on switch SWITCH receives the multicast message that joins request that downstream Sub VLAN1 sends, if this port did not receive corresponding multicast data flow before, recording the second port Port2 is to export with the forwarding of the corresponding multicast data flow of multicast group id.Switch SWITCH forms taking Sub VLAN1 as master index, taking multicast group id as secondary index and records the second port Port2 multicast forwarding list item of the forwarding outlet of multicast data flow for this reason according to above-mentioned information.And, this multicast join request message via switch SWITCH to Multicast Routing interface, the 3rd port Port3 send.If this port received corresponding multicast data flow before, in the multicast group id of this multicast data flow and the multicast list of this port, increase the user Sub VLAN mark that this multicast joins request in message comprising.
Wherein, this Multicast Routing interface is the interface that is specifically designed to receiving group stream, and is only only legal multicast data flow from the multicast data flow of Multicast Routing interface.In the time that switch SWITCH receives the multicast data flow of other non-Multicast Routing interfaces, assert that it is illegal multicast data flow, rejection is to prevent from down swimming forwarded.
In addition, switch SWITCH also can be this forwarding port opening ageing timer, so that Sub VLAN1, after ageing timer is overtime, initiatively sends IGMP group-specific query message to the second port Port2.
In the time that switch SWITCH receives multicast data flow from Multicast Routing interface, from the multicast forwarding list item of this locality storage, whether inquiry has the user need to this multicast data flow, whether there is the multicast forwarding list item that multicast group id is corresponding with this multicast data flow, if have, by multicast data flow, the forwarding from multicast forwarding list item outlet forwards, and is sent to the user Sub VLAN in multicast forwarding list item and identifies corresponding Sub VLAN; If no, this multicast data flow is not forwarded.For example, switch SWITCH knows that through inquiry multicast forwarding list item the main rope of multicast data flow is cited as Sub VLAN1, corresponding forwarding outlet is the second port Port2, by the second port Port2, multicast data flow is sent to Sub VLAN1, and can be sent to Sub VLAN2.
According to the multicast flow forwarding method of above-described embodiment, can realize the multicast data flow precise relay in a certain specific Sub VLAN of Super VLAN, to realize in the time that same port belongs to multiple Sub VLAN, still can precise relay to this specific Sub VLAN, and can in the multiple Sub VLAN that have this port, not broadcast.
Further, in the multicast flow forwarding method of above-described embodiment, if the downstream user of the second port Port2 no longer needs this part of multicast data flow, can send the message of leaving this multicast group, now can adopt mechanism while guarantor to delete forwarding outlet, while wherein guarantor, mechanism refers to a group-specific query timer is set, it is for example 10 seconds, and sent IGMP group-specific query message to the downstream user of the second port Port2 in these 10 seconds, if do not receive yet the response of this IGMP group-specific query message after group-specific query timer expiry, confirm that downstream user does not all need this part of multicast data flow, now delete and forward outlet, in the time that outlet is sky, delete this multicast forwarding list item, and send multicast group leave group message toward upstream, to stop multicast data flow again to forward downstream.
Embodiment tri-
On the basis of the multicast flow forwarding method of above-described embodiment one, described downstream multicast data flow receives the multiple sub-VLAN Sub VLAN that VLAN comprises Super VLAN; Correspondingly, the described multicast entrained described user vlan mark of message that joins request comprises that described multicast forwarding list item comprises described family Super VLAN mark, described user Sub VLAN mark, described port and described multicast identifier for the user Sub VLAN mark of the Sub VLAN at identifying user place with for the user Super VLAN mark of the Super VLAN at identifying user place.
The multicast flow forwarding method of this embodiment can be applied to the network architecture shown in Fig. 3, but wherein, IGMP Snooping function is open on Super VLAN, and it controls the multicast forwarding behavior of the Sub VLAN of Super VLAN and Super VLAN.Now, multicast traffic stream is walked three layers of Multicast Routing by Super VLAN and is issued, then is forwarded in the multicast member interface of Sub VLAN of Super VLAN.
Particularly, switch SWITCH for example receives by the second port Port2 the multicast message that joins request that the user of downstream Sub VLAN1 sends, form taking Super VLAN as master index, taking multicast group id as secondary index according to join request message and the second port Port2 of this multicast, and record Sub VLAN1 that this Super VLAN hangs down and the forwarding outlet of this multicast data flow, i.e. the second port Port2.And switch SWITCH forwards this multicast message that joins request to Multicast Routing interface.
More specifically, if not independent manually opened Multicast Routing interface on the Sub of Super VLAN VLAN, the common acquiescence of Multicast Routing interface is all three layer interfaces of Super VLAN so, and this interface does not normally have actual physical interfaces to add, therefore need local the multicast message that joins request to be passed to three layers of Multicast Routing resume module, the mode of walking Multicast Routing module by three layers of multicast form afterwards guides multicast traffic stream get off.
In addition, if on the Sub of Super VLAN VLAN manual configuration the physical interface of certain Sub VLAN be Multicast Routing interface, so now multicast traffic stream can also be walked Layer 2 Multicast form and receives from this Multicast Routing interface.
Switch SWITCH is from the Multicast Routing interface of Super VLAN or manual configuration receives the multicast data flow that user asks, first find corresponding Super VLAN with master index, find again Sub VLAN1 and the second corresponding port Port2 of lower extension, forwarding multicasting stream.
According to the multicast flow forwarding method of above-described embodiment, realize the precise relay in Super VLAN.
Further, at the multicast flow forwarding method of above-described embodiment, also comprise:
In the time that switch SWITCH receives multicast group leave group message, for example, adopt mechanism while guarantor to delete forwarding outlet, and delete this Sub VLAN in the time that all forwarding outlets of one of them Sub VLAN do not exist, to prevent that multicast data flow from forwarding toward this Sub VLAN again; And, in the time that the outlet of all Sub VLAN does not need multicast traffic stream, delete the multicast forwarding list item of whole Super VLAN, and upstream send multicast group leave group message, to stop multicast data flow data to forward toward downstream again.
Embodiment tetra-
Further, at the multicast flow forwarding method of above-described embodiment one, it is M-VLAN that described downstream multicast data flow receives VLAN, and the Sub VLAN of wherein said M-VLAN comprises the Sub VLAN of Super VLAN and the Common VLAN of non-described Super VLAN; Correspondingly, described multicast join request the entrained described user vlan mark of message comprise user Super VLAN mark for identifying described Super VLAN and following both one of: for the user Sub VLAN mark of the Sub VLAN of the Super VLAN at identifying user place, or for user's Common VLAN mark of the Common VLAN at identifying user place; Described multicast forwarding list item comprises described user Super VLAN mark, described user vlan mark, described port and described multicast identifier, and wherein said user vlan is designated described user Sub VLAN or described user's Common VLAN mark.
Fig. 4 is the network architecture diagram of the multicast flow forwarding method of the application embodiment of the present invention four.As shown in Figure 3, configuration Super VLAN is M-VLAN, and can specify other Common VLAN (VLAN3 and VLAN5 as shown in Figure 4) outside non-Super VLAN Sub VLAN as this M-VLAN, the multicast forwarding list item of so follow-up formation is unified hanging in Super VLAN just.
Switch is in the time that the second port Port2 receives that the multicast of Sub VLAN1 joins request message, this locality judges whether this physical port has been present in the Sub VLAN1 list item of hanging under Super VLAN, if exist, just refresh the ageing timer of this second port Port2; If not, generating main rope, to be cited as Super VLAN, secondary index be multicast group id and the Sub VLAN1 that records extension and the second corresponding port Port2, and this multicast message that joins request is sent to three layers of Multicast Routing resume module under Super VLAN or forwarded toward Multicast Routing interface.The multicast sending for the Common VLAN under this M-VLAN message that joins request, generating indexes is that Super VLAN, secondary index are multicast group id and user's Common VLAN of recording extension mark and corresponding forwarding outlet.
Switch SWITCH receives after the multicast data flow that user asks, by three layers of multicast mode, described multicast data flow is issued from identifying corresponding Super VLAN with described Super VLAN, according to the user Super VLAN mark corresponding with this multicast data flow, make flow away three layers of multicast mode of this multicast arrive Super VLAN, thereby search and know user Sub VLAN mark or user's Common VLAN mark of lower extension and forward outlet according to being based upon multicast forwarding list item on Super VLAN.Next, switch SWITCH copies described multicast data flow according to the quantity of described user Sub VLAN mark or Common VLAN mark in forwarding outlet, and the multicast data flow after copying is extremely identified to corresponding Sub VLAN or identifies corresponding Common VLAN with described user's Common VLAN with described user Sub VLAN by described port repeat.
According to the multicast flow forwarding method of above-described embodiment, realize the multicast data flow precise relay across Super VLAN.
Further, in the multicast flow forwarding method of above-described embodiment, for example, when switch SWITCH is in the time that one of them multicast forwarding of Sub VLAN1 exports (the second port Port2) receiving group group leave group message, in the Sub VLAN1 hanging, delete the second port Port2 under Super VLAN, and stopping copying toward the second port Port2 that to forward VLAN be the multicast data flow of Sub VLAN1, other are normal forwarding still; If judge and know that the second port Port2, in the Sub VLAN1 hanging under Super VLAN, last forwards outlet, deletes Sub VLAN1 simultaneously.Until all VLAN that hang under Super VLAN do not exist while forwarding outlet, send this multicast group leave group message toward three layers of upstreams Multicast Routing module, need this part of multicast data flow to tell upstream to no longer include downstream network.
Embodiment five
Further, on the basis of the multicast flow forwarding method of above-described embodiment one, it is M-VLAN that downstream multicast data flow receives VLAN, and the Sub VLAN of wherein said M-VLAN comprises the Common VLAN of Super VLAN and non-described Super VLAN; Correspondingly, if described user belongs to the Sub VLAN of described Super VLAN, the described multicast entrained described user vlan mark of message that joins request comprises user multicast VLAN mark, user Super VLAN mark and user Sub VLAN mark, if described user belongs to described Common VLAN, the described multicast entrained described user vlan mark of message that joins request comprises that user multicast VLAN mark and user's Common VLAN identify.
Particularly, the multicast flow forwarding method of the present embodiment is applicable to the network architecture shown in Fig. 4, but the concrete configuration in this network is: the Sub VLAN that configuration Super VLAN is M-VLAN, and the Sub VLAN of Super VLAN becomes the Sub VLAN of this M-VLAN automatically; And the Sub VLAN of this M-VLAN also comprises other Common VLAN, and allow the multicast data flow of other VLAN by being issued in Super VLAN across Layer 2 Multicast mode.
Switch SWITCH is in the time receiving multicast and join request message, and the main rope of the multicast forwarding list item of setting up is cited as M-VLAN, and secondary index is multicast group id, and lower extension Super VLAN, Sub VLAN and forward outlet, or lower extension Common VLAN and forward outlet.The switch SWITCH message that also multicast joined request is forwarded to three layers of Multicast Routing module or Multicast Routing interface (can be to obtain through dynamic I GMP/PIM protocol massages mode or user's static configuration mode), need to receive this part of multicast traffic stream upstream to express downstream user.
Switch receives after the multicast data flow that user asks, for example by three layers of multicast mode or via Multicast Routing interface, described multicast data flow is issued from identifying corresponding M-VLAN with described user multicast VLAN, described multicast data flow is copied according to the quantity of described user Sub VLAN mark or Common VLAN mark at described port, and the multicast data flow after copying is extremely identified to corresponding Sub VLAN or identifies corresponding Common VLAN with described Common VLAN with described user Sub VLAN by described port repeat.
According to the multicast flow forwarding method of above-described embodiment, realize the multicast data flow precise relay across multilayer VLAN.
Further, in the multicast flow forwarding method of above-described embodiment, when switch receives from port the leave group message of user's transmission of downstream multicast data flow reception VLAN, according to the similar method of above-mentioned arbitrary embodiment, successively delete the record in multicast forwarding list item, forward outlet until all VLAN that hang under M-VLAN do not exist, upstream three layers of Multicast Routing module or Multicast Routing interface send multicast group leave group message, the multicast data flow issuing to cut off upstream.
Embodiment six
Fig. 5 is the structural representation of the network equipment of the embodiment of the present invention six.As shown in Figure 5, this network equipment comprises:
Configuration module 61, for configuring, upstream multicast flows into VLAN and downstream multicast data flow receives VLAN;
Multicast forwarding list item is set up module 62, when join request message for receive the multicast of user's transmission of downstream multicast data flow VLAN from the port of described downstream multicast data flow reception VLAN, set up multicast forwarding list item according to join request message and described port of described multicast, wherein, the described multicast message that joins request carries the multicast identifier that user vlan for identifying described user place VLAN mark and described user ask, and described multicast forwarding list item comprises that described user vlan identifies, described port and described multicast identifier;
Multicast data flow forwarding module 63, flows into for receiving described multicast the multicast data flow corresponding with described multicast identifier that VLAN issues, and according to described multicast forwarding list item, described multicast data flow is forwarded to user place VLAN.
According to the network equipment of above-described embodiment, because the message generation that joins request according to the multicast of user's transmission comprises user vlan mark, the multicast forwarding list item of multicast identifier and port information, so while being the shared port of multiple VLAN in convenient network, for example the second virtual LAN VLAN 2 in Fig. 2 and the 3rd virtual LAN VLAN 3 share the second port Port2, the network equipment still can will receive multicast data flow precise relay to the VLAN that asks this multicast data flow, overcome and in prior art, be directed to this network architecture, the defect that needs simultaneously multicast data flow to be sent to all VLAN under this port and cause network resources waste.
Further, in the network equipment of above-described embodiment, described downstream multicast data flow receives the multiple sub-VLAN Sub VLAN that VLAN comprises super VLAN Super VLAN; Correspondingly, the described multicast entrained described user vlan of message that joins request is designated the user Sub VLAN mark of the Sub VLAN for identifying described user place, and described multicast forwarding list item comprises described user Sub VLAN mark, described port and described multicast identifier.
Further, in the network equipment of above-described embodiment, described multicast data flow forwarding module is also for receiving after the multicast data flow that user asks, joining request according to described multicast, the entrained user Sub VLAN of message identifies and described multicast identifier is searched corresponding multicast forwarding list item, according to described multicast forwarding list item, described multicast data flow is extremely identified to corresponding Sub VLAN with described user Sub VLAN by described port repeat.
According to the network equipment of above-described embodiment, can realize the multicast data flow precise relay in a certain specific Sub VLAN of Super VLAN, to realize in the time that same port belongs to multiple Sub VLAN, still can precise relay to this specific Sub VLAN, and can in the multiple Sub VLAN that have this port, not broadcast.
Further, in the network equipment of above-described embodiment, described downstream multicast data flow receives the multiple sub-VLAN Sub VLAN that VLAN comprises Super VLAN; Correspondingly, the described multicast entrained described user vlan mark of message that joins request comprises that described multicast forwarding list item comprises described user Super VLAN mark, described user Sub VLAN mark, described port and described multicast identifier for the user Sub VLAN mark of the Sub VLAN at identifying user place with for the user Super VLAN mark of the Super VLAN at identifying user place.
Further, in the network equipment of above-described embodiment, multicast data flow forwarding module is also for receiving after the multicast data flow that user asks, joining request according to described multicast, the entrained user Super VLAN of message identifies and described multicast identifier is searched corresponding multicast forwarding list item, and according to described multicast forwarding list item, described multicast data flow is extremely identified to corresponding Sub VLAN with described user Sub VLAN by described port repeat.
According to the network equipment of above-described embodiment, realize the precise relay in Super VLAN.
Further, in the network equipment of above-described embodiment, it is M-VLAN that described downstream multicast data flow receives VLAN, and the Sub VLAN of wherein said M-VLAN comprises the Sub VLAN of Super VLAN and the Common VLAN of non-described Super VLAN; Correspondingly, described multicast join request the entrained described user vlan mark of message comprise user Super VLAN mark for identifying described Super VLAN and following both one of: for the user Sub VLAN mark of the Sub VLAN of the Super VLAN at identifying user place, or for user's Common VLAN mark of the Common VLAN at identifying user place; Described multicast forwarding list item comprises described user Super VLAN mark, described user vlan mark, described port and described multicast identifier, and wherein said user vlan is designated described user Sub VLAN or described user's Common VLAN mark.
Further, in the network equipment of above-described embodiment, described multicast data flow forwarding module is also for receiving after the multicast data flow that user asks, described multicast data flow is issued from identifying corresponding Super VLAN with described Super VLAN, described multicast data flow is copied according to the quantity of described user Sub VLAN mark or Common VLAN mark at described port, and the multicast data flow after copying is extremely identified to corresponding Sub VLAN or identifies corresponding Common VLAN with described user's Common VLAN with described user Sub VLAN by described port repeat.
According to the network equipment of above-described embodiment, realize the multicast data flow precise relay across Super VLAN.
Further, in the network equipment of above-described embodiment, it is M-VLAN that described downstream multicast data flow receives VLAN, and the Sub VLAN of wherein said M-VLAN comprises the Common VLAN of Super VLAN and non-described Super VLAN; Correspondingly, if described user belongs to the Sub VLAN of described Super VLAN, the described multicast entrained described user vlan mark of message that joins request comprises user multicast VLAN mark, user Super VLAN mark and user Sub VLAN mark, if described user belongs to described Common VLAN, the described multicast entrained described user vlan mark of message that joins request comprises that user multicast VLAN mark and user's Common VLAN identify.
Further, in the network equipment of above-described embodiment, described multicast data flow forwarding module is also for receiving after the multicast data flow that user asks, described multicast data flow is issued from identifying corresponding M-VLAN with described user multicast VLAN, described multicast data flow is copied according to the quantity of described user Sub VLAN mark or Common VLAN mark at described port, and the multicast data flow after copying is extremely identified to corresponding Sub VLAN or identifies corresponding Common VLAN with described user's Common VLAN with described user Sub VLAN by described port repeat.
According to the network equipment of above-described embodiment, realize the multicast data flow precise relay across multilayer VLAN.
Further, in the network equipment of above-described embodiment, also comprise:
Multicast forward table entry deletion module, if receive the leave group message that the user of VLAN sends for receive described downstream multicast data flow from described port, delete the multicast forwarding list item corresponding with described leave group message, wherein said leave group message carries the multicast identifier that user vlan identifies and described user asks for identifying described user place VLAN.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (18)
1. a multicast flow forwarding method, is characterized in that, comprising:
The upstream multicast of configure network devices flows into virtual LAN VLAN and downstream multicast data flow receives VLAN;
When the described network equipment receives multicast that user that the port of VLAN receives downstream multicast data flow VLAN sends and joins request message from described downstream multicast data flow, set up multicast forwarding list item according to join request message and described port of described multicast, wherein, the described multicast message that joins request carries the multicast identifier that user vlan for identifying described user place VLAN mark and described user ask, and described multicast forwarding list item comprises that described user vlan identifies, described port and described multicast identifier;
The described network equipment receives described multicast and flows into the multicast data flow corresponding with described multicast identifier that VLAN issues, and according to described multicast forwarding list item, described multicast data flow is forwarded to user place VLAN;
Described downstream multicast data flow receives VLAN and comprises M-VLAN, and the Sub VLAN of wherein said M-VLAN comprises the Common VLAN of Super VLAN and non-described Super VLAN; Correspondingly, if described user belongs to the Sub VLAN of described Super VLAN, the described multicast entrained described user vlan mark of message that joins request comprises user multicast VLAN mark, user Super VLAN mark and user Sub VLAN mark, if described user belongs to described Common VLAN, the described multicast entrained described user vlan mark of message that joins request comprises that user multicast VLAN mark and user's Common VLAN identify.
2. multicast flow forwarding method according to claim 1, is characterized in that, described downstream multicast data flow receives the multiple sub-VLAN Sub VLAN that VLAN also comprises super VLAN Super VLAN; Correspondingly, the described multicast entrained described user vlan of message that joins request is designated the user Sub VLAN mark of the Sub VLAN for identifying described user place, and described multicast forwarding list item comprises described user Sub VLAN mark, described port and described multicast identifier.
3. multicast flow forwarding method according to claim 2, it is characterized in that, the described network equipment receives described multicast and flows into the multicast data flow corresponding with described multicast identifier that VLAN issues, and the step that described multicast data flow is forwarded to user place VLAN according to described multicast forwarding list item comprises:
The described network equipment receives after the multicast data flow that user asks, joining request according to described multicast, the entrained user Sub VLAN of message identifies and described multicast identifier is searched corresponding multicast forwarding list item, according to described multicast forwarding list item, described multicast data flow is extremely identified to corresponding Sub VLAN with described user Sub VLAN by described port repeat.
4. multicast flow forwarding method according to claim 1, is characterized in that, described downstream multicast data flow receives the multiple sub-VLAN Sub VLAN that VLAN also comprises Super VLAN; Correspondingly, the described multicast entrained described user vlan mark of message that joins request comprises that described multicast forwarding list item comprises described user Super VLAN mark, described user Sub VLAN mark, described port and described multicast identifier for the user Sub VLAN mark of the Sub VLAN at identifying user place with for the user Super VLAN mark of the Super VLAN at identifying user place.
5. multicast flow forwarding method according to claim 4, it is characterized in that, the described network equipment receives described multicast and flows into the multicast data flow corresponding with described multicast identifier that VLAN issues, and the step that described multicast data flow is forwarded to user place VLAN according to described multicast forwarding list item comprises:
The described network equipment receives after the multicast data flow that user asks, joining request according to described multicast, the entrained user Super VLAN of message identifies and described multicast identifier is searched corresponding multicast forwarding list item, and according to described multicast forwarding list item, described multicast data flow is extremely identified to corresponding Sub VLAN with described user Sub VLAN by described port repeat.
6. multicast flow forwarding method according to claim 1, it is characterized in that, described downstream multicast data flow receives VLAN and also comprises M-VLAN, and the Sub VLAN of wherein said M-VLAN comprises the Sub VLAN of Super VLAN and the Common VLAN of non-described Super VLAN; Correspondingly, described multicast join request the entrained described user vlan mark of message comprise user Super VLAN mark for identifying described Super VLAN and following both one of: for the user Sub VLAN mark of the Sub VLAN of the Super VLAN at identifying user place, or for user's Common VLAN mark of the Common VLAN at identifying user place; Described multicast forwarding list item comprises described user Super VLAN mark, described user vlan mark, described port and described multicast identifier, and wherein said user vlan is designated described user Sub VLAN mark or described user's Common VLAN mark.
7. multicast flow forwarding method according to claim 6, it is characterized in that, the described network equipment receives described multicast and flows into the multicast data flow corresponding with described multicast identifier that VLAN issues, and the step that described multicast data flow is forwarded to user place VLAN according to described multicast forwarding list item comprises:
The described network equipment receives after the multicast data flow that user asks, described multicast data flow is issued from identifying corresponding Super VLAN with described Super VLAN, described multicast data flow is copied according to the quantity of described user Sub VLAN mark or user's Common VLAN mark at described port, and the multicast data flow after copying is extremely identified to corresponding Sub VLAN or identifies corresponding Common VLAN with described user's Common VLAN with described user Sub VLAN by described port repeat.
8. multicast flow forwarding method according to claim 1, it is characterized in that, the described network equipment receives described multicast and flows into the multicast data flow corresponding with described multicast identifier that VLAN issues, and the step that described multicast data flow is forwarded to user place VLAN according to described multicast forwarding list item comprises:
The described network equipment receives after the multicast data flow that user asks, described multicast data flow is issued from identifying corresponding M-VLAN with described user multicast VLAN, described multicast data flow is copied according to the quantity of described user Sub VLAN mark or user's Common VLAN mark at described port, and the multicast data flow after copying is extremely identified to corresponding Sub VLAN or identifies corresponding Common VLAN with described user's Common VLAN with described user Sub VLAN by described port repeat.
9. according to the arbitrary described multicast flow forwarding method of claim 1 to 8, it is characterized in that, also comprise:
If the described network equipment receives the leave group message of user's transmission of described downstream multicast data flow reception VLAN from described port, delete the multicast forwarding list item corresponding with described leave group message, wherein said leave group message carries the multicast identifier that user vlan identifies and described user asks for identifying described user place VLAN.
10. a network equipment, is characterized in that, comprising:
Configuration module, for configuring, upstream multicast flows into VLAN and downstream multicast data flow receives VLAN;
Multicast forwarding list item is set up module, when join request message for receive the multicast of user's transmission of downstream multicast data flow VLAN from the port of described downstream multicast data flow reception VLAN, set up multicast forwarding list item according to join request message and described port of described multicast, wherein, the described multicast message that joins request carries the multicast identifier that user vlan for identifying described user place VLAN mark and described user ask, and described multicast forwarding list item comprises that described user vlan identifies, described port and described multicast identifier;
Multicast data flow forwarding module, flows into for receiving described multicast the multicast data flow corresponding with described multicast identifier that VLAN issues, and according to described multicast forwarding list item, described multicast data flow is forwarded to user place VLAN;
Described downstream multicast data flow receives VLAN and comprises M-VLAN, and the Sub VLAN of wherein said M-VLAN comprises the Common VLAN of Super VLAN and non-described Super VLAN; Correspondingly, if described user belongs to the Sub VLAN of described Super VLAN, the described multicast entrained described user vlan mark of message that joins request comprises user multicast VLAN mark, user Super VLAN mark and user Sub VLAN mark, if described user belongs to described Common VLAN, the described multicast entrained described user vlan mark of message that joins request comprises that user multicast VLAN mark and user's Common VLAN identify.
11. network equipments according to claim 10, is characterized in that, described downstream multicast data flow receives the multiple sub-VLAN Sub VLAN that VLAN also comprises super VLAN Super VLAN; Correspondingly, the described multicast entrained described user vlan of message that joins request is designated the user Sub VLAN mark of the Sub VLAN for identifying described user place, and described multicast forwarding list item comprises described user Sub VLAN mark, described port and described multicast identifier.
12. network equipments according to claim 11, it is characterized in that, described multicast data flow forwarding module is also for receiving after the multicast data flow that user asks, joining request according to described multicast, the entrained user Sub VLAN of message identifies and described multicast identifier is searched corresponding multicast forwarding list item, according to described multicast forwarding list item, described multicast data flow is extremely identified to corresponding Sub VLAN with described user Sub VLAN by described port repeat.
13. network equipments according to claim 10, is characterized in that, described downstream multicast data flow receives the multiple sub-VLAN Sub VLAN that VLAN also comprises Super VLAN; Correspondingly, the described multicast entrained described user vlan mark of message that joins request comprises that described multicast forwarding list item comprises described user Super VLAN mark, described user Sub VLAN mark, described port and described multicast identifier for the user Sub VLAN mark of the Sub VLAN at identifying user place with for the user Super VLAN mark of the Super VLAN at identifying user place.
14. network equipments according to claim 13, it is characterized in that, multicast data flow forwarding module is also for receiving after the multicast data flow that user asks, joining request according to described multicast, the entrained user Super VLAN of message identifies and described multicast identifier is searched corresponding multicast forwarding list item, and according to described multicast forwarding list item, described multicast data flow is extremely identified to corresponding Sub VLAN with described user Sub VLAN by described port repeat.
15. network equipments according to claim 10, it is characterized in that, described downstream multicast data flow receives VLAN and also comprises M-VLAN, and the Sub VLAN of wherein said M-VLAN comprises the Sub VLAN of Super VLAN and the Common VLAN of non-described Super VLAN; Correspondingly, described multicast join request the entrained described user vlan mark of message comprise user Super VLAN mark for identifying described Super VLAN and following both one of: for the user Sub VLAN mark of the Sub VLAN of the Super VLAN at identifying user place, or for user's Common VLAN mark of the Common VLAN at identifying user place; Described multicast forwarding list item comprises described user Super VLAN mark, described user vlan mark, described port and described multicast identifier, and wherein said user vlan is designated described user Sub VLAN mark or described user's Common VLAN mark.
16. network equipments according to claim 15, it is characterized in that, described multicast data flow forwarding module is also for receiving after the multicast data flow that user asks, described multicast data flow is issued from identifying corresponding Super VLAN with described Super VLAN, described multicast data flow is copied according to the quantity of described user Sub VLAN mark or user's Common VLAN mark at described port, and the multicast data flow after copying is extremely identified to corresponding Sub VLAN or identifies corresponding Common VLAN with described user's Common VLAN with described user Sub VLAN by described port repeat.
17. network equipments according to claim 10, it is characterized in that, described multicast data flow forwarding module is also for receiving after the multicast data flow that user asks, described multicast data flow is issued from identifying corresponding M-VLAN with described user multicast VLAN, described multicast data flow is copied according to the quantity of described user Sub VLAN mark or user's Common VLAN mark at described port, and the multicast data flow after copying is extremely identified to corresponding Sub VLAN or identifies corresponding Common VLAN with described user's Common VLAN with described user Sub VLAN by described port repeat.
18. according to claim 10 to 17 arbitrary described network equipments, it is characterized in that, also comprise:
Multicast forward table entry deletion module, if receive the leave group message that the user of VLAN sends for receive described downstream multicast data flow from described port, delete the multicast forwarding list item corresponding with described leave group message, wherein said leave group message carries the multicast identifier that user vlan identifies and described user asks for identifying described user place VLAN.
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| CN103326996B (en) * | 2012-03-23 | 2018-08-07 | 南京中兴软件有限责任公司 | A kind of method and system that control multicast member is added |
| CN103354524B (en) * | 2013-07-03 | 2016-08-10 | 杭州华三通信技术有限公司 | A kind of method and apparatus realizing three layers of on-demand routing of multicast based on PIM-SSM |
| CN105897541B (en) * | 2016-04-11 | 2018-11-06 | 烽火通信科技股份有限公司 | The method of compatible SUPER VLAN and VLANIF in IPRAN systems |
| CN109039675A (en) * | 2018-09-26 | 2018-12-18 | 盛科网络（苏州）有限公司 | Member based on IGMPv2 agreement leaves management method and system |
| CN110391919B (en) * | 2019-07-12 | 2021-03-23 | 杭州迪普科技股份有限公司 | Multicast traffic forwarding method and device, and electronic device |
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