CN101035050A - Processing method of the virtual LAN aggregation - Google Patents
Processing method of the virtual LAN aggregation Download PDFInfo
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- CN101035050A CN101035050A CNA2007100735313A CN200710073531A CN101035050A CN 101035050 A CN101035050 A CN 101035050A CN A2007100735313 A CNA2007100735313 A CN A2007100735313A CN 200710073531 A CN200710073531 A CN 200710073531A CN 101035050 A CN101035050 A CN 101035050A
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Abstract
The invention discloses a virtual local-area network (VLAN) convergence processing method, comprising the steps of: a. layer 2 (L2) switching module of Ethernet makes MAC address learning and L2 transmission judgment; b. converging VLAN ID, MAC and port respectively to implement VLAN convergence; c. L3 routing module makes L3 routing transmission according to routing table; d. stream classifying module makes QOS regulation or flow control on incoming Ethernet frame; e. making transmission operation according to the results of the above steps. By logic convergence, the invention implements VLAN extensibility, improves VLAN application flexibility and expanding function; and implements reasonable flow distribution and balance by physical port monitoring and detection.
Description
Technical field
The present invention relates to a kind of VLAN (Virtual Local Area Network, the VLAN) processing method of polymerization.
Background technology
VLAN is a kind of by with local area network (LAN) (Local Area Network, thereby the emerging technology that is divided into the realization of the network segment one by one virtual work group of apparatus logic ground LAN) rather than physics.IEEE has issued the 802.1Q consensus standard draft in order to standardized VLAN implementation in 1999.
Vlan technology allows network manager that the LAN of a physics logically is divided into different broadcast domains, because it is logically rather than physically to divide, so each work station in the same VLAN need not be placed in the same physical space, these work stations not necessarily belong to the same physics LAN network segment.
VLAN is for the broadcast issue that solves Ethernet and fail safe and a kind of agreement that proposes, it has increased the VLAN head on the basis of ethernet frame, with VLAN ID the user is divided into littler working group, two layers of exchanging visit of user between restriction different operating group, each working group is exactly a VLAN.The benefit of VLAN is to limit broadcasting area, and can form the virtual work group, the dynamic management network.
At present, the transaction module of general VLAN is the MAC chip of L2/L3 layer (second layer of Ethernet/3rd layer) exchange normally, mainly comprises L2 Switching Module, L3 routing module, traffic classification module and forwarding engine etc.
The present basic application schematic diagram of VLAN as shown in Figure 1, wherein port1, port2, port3 and port4 represent descending service port respectively, when these ports will on send professional the time, VLAN1,2,3,4,5,6,7,8,9 by logic interfacing, with Port BindingBundling separately, by the inter-process of A equipment, data are delivered to port7, port8 again, again according to the position of logic port, on send B device processes.
Accompanying drawing 2 is depicted as and utilizes VLAN aggregation realization IP address effectively to divide timing, after data flow enters physical port, handles according to following steps, comprising:
201, the L2 Switching Module carries out MAC address learning and L2 layer forwarding judgement.
After data flow enters L2, look into MAC (address definition of Ethernet) table earlier, if find coupling purpose MAC, then find corresponding port to forward, if do not find, then learn to wait to be aging in MAC and VLAN and port corresponding relation thereof the record MAC table, return data bag subsequently send packet to handle to CPU again.
202, the L3 routing module carries out L3 layer routing forwarding according to routing table, if what use is L2 chip then this module not.
203, the traffic classification module is done QOS (service quality) adjustment and flow control to entering Ether frame.If L2 layer chip then can carry out Flow Control according to the COS position in source target MAC (Media Access Control) address, port, vlan number, the Ether frame, reduce priority even abandon; If L3 layer chip can also add the port numbers of TCP/UDP according to TOS (COS) position, IP source destination address, the IP address in the IP bag, even carry out QOS according to the information of application layer and adjust and flow control.
204, forwarding engine is done the forwarding operation according to the result of prior module, the COS in Ether frame of the selection of output queue and priority query's mapping table or Diffserv (Differentiated Services) table.
The shortcoming of this method is: the system equipment maximum is only supported 4094 VLAN at present, and network size is less.
Summary of the invention
Technical problem to be solved by this invention provides a kind of processing method of virtual LAN aggregation, increases the flexible Performance And Reliability of networking, enlarges network size.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of processing method of virtual LAN aggregation, after data flow entered physical port, processing method comprised step:
A, L2 Switching Module carry out MAC address learning and the L2 layer is transmitted judgement;
B, with the polymerization respectively of virtual LAN VLAN ID, MAC, port, realize the polymerization of VLAN;
C, L3 routing module carry out L3 layer routing forwarding according to routing table;
D, traffic classification module are done the adjustment or the flow control of QOS aspect to entering Ether frame;
E, transmit operation according to the result of above-mentioned steps.
Wherein, described step b may further comprise the steps: after CPU receives packet, look into the VLAN aggregation table earlier, if find the port of corresponding MAC Address, then forward, otherwise check that whether this VLAN participates in polymerization, does not then abandon; If participated in polymerization, then learn in MAC and VLAN aggregation group and the port corresponding relation record MAC table, alias VLAN is the VLAN aggregation group number.
Wherein, also comprise the flow equalization of realizing the VLAN aggregation group among the described step b.
Wherein, the physical port state can be monitored and detect to described VLAN aggregation group.
Wherein, the implementation method of the flow equalization of described VLAN aggregation group is: adopt hash algorithm, from given port of aggregation port group selection, purpose MAC that carries with Frame and former MAC are as the KEY value of hash algorithm, according to flow, realize by the balanced table of aggregation group.
Wherein, the implementation method of the flow equalization of described VLAN aggregation group is: VLAN aggregation group monitors physical port status, guarantee the data more unimpeded road that flows away, and realize the flow relative equilibrium of different bandwidth port.
Wherein, in the described steps d selection of output queue according to the flow equalization of the COS in the Ether frame and priority query's mapping table or Diffserv table, VLAN aggregation group.
Wherein, if the transaction module of VLAN is a L2 layer chip, then do not comprise step c.
Wherein, in the described steps d,, then can carry out flow control, reduce priority even abandon according to the COS position in source target MAC (Media Access Control) address, port, vlan number, the Ether frame if the transaction module of VLAN is a L2 layer chip; If L3 layer chip, the information that also can add port numbers, the application layer of TCP/UDP according to TOS position, IP source destination address, the IP address in the IP bag is carried out QOS and is adjusted and flow control.
The present invention has following beneficial effect:
1) polymerization by logic realizes the scalability of VLAN, can be expanded to N*4094 (N is the number of vlangroup group) by original VLAN restriction 4094, has improved VLAN application flexibility and Telescopic;
2) owing in the VLAN aggregation group, increased physical port monitoring and detection, realized that the dynamic bandwidth of VLAN aggregation detects;
3) by to physical port monitoring and detection, reasonable flow distribution and flow equalization have been realized.
Description of drawings
Fig. 1 is that present VLAN uses schematic diagram;
Fig. 2 is a vlan data newspaper processing method schematic diagram;
Fig. 3 is that VLAN of the present invention uses schematic diagram;
Fig. 4 is a vlan data newspaper processing method schematic diagram of the present invention;
Fig. 5 is an application example 1 of the present invention, and Ethernet switch and router be the supported vlans aggregation protocol all;
Fig. 6 is an application example 2 of the present invention, Ethernet switch supported vlans aggregation protocol, and router is not supported;
Fig. 7 is an application example 3 of the present invention, router supported vlans aggregation protocol, and Ethernet switch is not supported.
Embodiment
The core concept of the inventive method is: with a plurality of VLAN of configuration on the system equipment, by polymerization, replace to certain VLAN group, in the VLAN group, comprise the MAC Address of port information, vlan list and aggregation port, finish flow equalization by the detection of dynamic and the HASH algorithm of aggregation group again.
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
Figure 3 shows that VLAN of the present invention uses schematic diagram, port1, port2, port3 and port4 represent descending service port respectively, when on these ports need, sending business, VLAN1,2,3,4,5,6,7,8 by logic interfacing, 9 and the binding of port separately, pass through the inter-process of A equipment again, the business polymerization that VLAN1～9 are uploaded replace to one independently logic interfacing vlangroup1 upload, and logically realize the method for data flow polymerization and dynamic equalization on this basis.During downlink data transmission, deliver to the vlangroug1 group earlier, search corresponding vlan list, port list and mac table by port again, realize professional reliable transmission.
Figure 4 shows that the implementation method of vlangroup1, in the transaction module of general VLAN, increase the function of a L2 polymerization, the transaction module of general VLAN is the MAC chip of a L2/L3 layer exchange normally, mainly comprises L2 Switching Module, L3 routing module, traffic classification module and forwarding engine etc.
After data flow enters physical port, according to following step process:
401, the L2 Switching Module carries out MAC address learning and L2 layer forwarding judgement.
After data flow enters L2, look into the MAC table earlier, if find coupling purpose MAC, then find corresponding port to forward,, then learn in MAC and VLAN and port corresponding relation thereof the record MAC table if do not find, etc. to be aging, return data bag subsequently send packet to handle to CPU again.
402, the polymerization module of L2 is finished the polymerization of VLAN ID, port and MAC.
After CPU receives packet, look into the VLAN aggregation table earlier,, then forward if find the port of corresponding MAC Address; Otherwise check whether this VLAN participates in polymerization, does not then abandon,, then learn in MAC and VLAN aggregation group and the port corresponding relation record MAC table that alias VLAN is the VLAN aggregation group number if participated in polymerization.
403, the L3 routing module mainly carries out L3 layer routing forwarding according to routing table, if the L2 chip does not then have this module.
404, the traffic classification module mainly is to do QOS adjustment or flow restriction to entering Ether frame, if L2 layer chip, then can carry out Flow Control according to the COS position in source target MAC (Media Access Control) address, port, vlan number, the Ether frame, reduce priority even abandon, if L3 layer chip can also add the port numbers of TCP/UDP according to TOS position, IP source destination address, the IP address in the IP bag, even carry out QOS according to the information of application layer and adjust and flow control.
405, forwarding engine is done the forwarding operation according to the result of the several modules in front, and the selection of output queue is according to the COS in the Ether frame and priority query's mapping table or Diffserv table or VLAN aggregation equilibrium etc.
The L2 polymerization module that increases in the above-mentioned steps 402 is replaced and polymerization in order to realize VLAN, comprises the polymerization of VLAN ID, the polymerization of MAC and the polymerizable functional of port, thereby realizes the polymerizable functional of VLAN.As 4094 VLAN of the maximum support of present system equipment,, can expand down N*4094 VLAN by polymerization.
In the above-mentioned steps 402, also comprise the VLAN aggregation group equalization function that realizes forwarding, finish the flow equalization of aggregation group.Following two kinds of implementation methods are arranged:
1, the logic aggregation group adopts the HASH algorithm from given port of aggregation port group selection, and DA (purpose MAC) that carries with Frame and SA (source MAC) are as the KEY value of HASH algorithm, according to flow, by the balanced realization flow equalization of showing of aggregation group.
2, VLAN aggregation group monitors physical port status, the more unimpeded road of selecting data to flow away, the flow relative equilibrium of realization different bandwidth port.
Figure 5 shows that application example 1 of the present invention, host A .1 belongs to VLAN1 among the figure, and host A .2 belongs to VLAN2; Host B .1 belongs to VLAN3, and host B .2 belongs to VLAN5; Host C .1 belongs to VLAN4.On Ethernet switch with VLAN1, VLAN2, VLAN3, VLAN4 and VLAN5 aggregate into vlangroup1, the VLAN aggregation agreement is finished the maintenance of agreement and mutual.Under the normal condition, the processing mode of data flow has following several:
1, the method that adopts single chartered steamer to change guarantees that each link is basic balanced fully.
2, routing is carried out in the combination of comprehensive source and destination IP address, such as shunting equilibrium according to the purpose difference.
3, time-delay is weighted equilibrium according to aggregated links.
After if circuit delay surpasses a threshold values, the virtual condition of vlangroup aggregation group monitoring system physical port, pass through weighting algorithm, if circuit 1 time-delay 10ms, and circuit 2 time-delay 20ms, then the actual data flow that sends from circuit 1 of stream is 2/3, and the data flow that sends from circuit 2 is 1/3, and Weighted Index is data 1/3 and 2/3;
If the circuit A that sends to router from main frame occurs congested or postpones big the time, data flow can transfer the B path automatically;
If behind circuit fracture wherein, vlangroup can mail to all data streams another circuit;
If router supported vlans aggregation protocol then protocols having is mutual, information such as VLAN protocol interaction state, port, MAC Address and polymerization VLAN ID;
If router is the aggregation protocol of supported vlans not, then Ethernet switch can be determined line status according to modes such as detections, sends data flow according to line status, and other is by standard VLAN protocol operation, as shown in Figure 6.
If Ethernet switch is the aggregation protocol of supported vlans not, then router can be determined line status according to modes such as detections, sends data flow according to line status, and other is by standard VLAN protocol operation, as shown in Figure 7.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, a kind of processing method of virtual LAN aggregation is characterized in that, after data flow entered physical port, processing method comprised step:
Two layers of L2 Switching Module of a, Ethernet carry out MAC address learning and the L2 layer is transmitted judgement;
B, with the polymerization respectively of virtual LAN VLAN ID, MAC, port, realize the polymerization of VLAN;
C, L3 routing module carry out L3 layer routing forwarding according to routing table;
D, traffic classification module are done the adjustment or the flow control of service quality QOS aspect to entering Ether frame;
E, transmit operation according to the result of above-mentioned steps.
2, the processing method of virtual LAN aggregation as claimed in claim 1, it is characterized in that, described step b may further comprise the steps: after CPU receives packet, look into the VLAN aggregation table earlier, if find the port of corresponding MAC Address, then forward, otherwise check whether this VLAN participates in polymerization, does not then abandon, if participated in polymerization, then learn in MAC and VLAN aggregation group and the port corresponding relation record MAC table, alias VLAN is the VLAN aggregation group number.
3, the processing method of virtual LAN aggregation as claimed in claim 1 is characterized in that, also comprises the flow equalization of realizing the VLAN aggregation group among the described step b.
4, the processing method of virtual LAN aggregation as claimed in claim 3 is characterized in that, the physical port state can be monitored and detect to described VLAN aggregation group.
5, the processing method of virtual LAN aggregation as claimed in claim 3, it is characterized in that, the implementation method of the flow equalization of described VLAN aggregation group is: adopt hash algorithm, from given port of aggregation port group selection, purpose MAC that carries with Frame and former MAC are as the KEY value of hash algorithm, according to flow, realize by the balanced table of aggregation group.
6, the processing method of virtual LAN aggregation as claimed in claim 3, it is characterized in that, the implementation method of the flow equalization of described VLAN aggregation group is: VLAN aggregation group monitors physical port status, guarantee the data more unimpeded road that flows away, and realize the flow relative equilibrium of different bandwidth port.
7, the processing method of virtual LAN aggregation as claimed in claim 1 is characterized in that, the selection of output queue is according to the flow equalization of the COS in the Ether frame and priority query's mapping table or Differentiated Services table, VLAN aggregation group in the described steps d.
8, the processing method of virtual LAN aggregation as claimed in claim 1 is characterized in that, if the transaction module of VLAN is a L2 layer chip, does not then comprise step c.
9, the processing method of virtual LAN aggregation as claimed in claim 1, it is characterized in that, in the described steps d, if the transaction module of VLAN is a L2 layer chip, then can carry out flow control, reduce priority even abandon according to the COS position in source target MAC (Media Access Control) address, port, vlan number, the Ether frame; If L3 layer chip, the information that also can add port numbers, the application layer of TCP/UDP according to TOS position, IP source destination address, the IP address in the IP bag is carried out QOS and is adjusted and flow control.
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| WO2008077347A1 (en) * | 2006-12-25 | 2008-07-03 | Huawei Technologies Co., Ltd. | Link aggregation method, device, mac frame receiving/sending method and system |
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