CN1411213A - Ethernet switch in net virtual local network switch in technique - Google Patents
Ethernet switch in net virtual local network switch in technique Download PDFInfo
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Abstract
This invention relates to Ethernet cut-over net virtual LAN cut-over technology including port and 802.1 Q protocol to realize VLAN automatic joining and flexible switch via VLAN ID in virtual LAN tag. This invented method is to set up adaptive VLAN submodule in the equipment soft exchange protocol and function module in which the adaptive VLANN submodule can be distributed into following tasks: interrupting detection task, main process task, ageing process task. Since VLAN ID in tag is applied for automatic joining, cancel ageing, switch in the Ethernet exchange equipment, this method reduces network management manual arrangement need in ordinary VLAN.
Description
Technical field
The present invention relates to a kind of Ethernet Access Network VLAN access technology.Be to dispose automatically with real-time software to replace loaded down with trivial details network management configuration, changing for networking has better adaptability, does not need a kind of VLAN access technology of complicated network management configuration.
Background technology
Virtual LAN VLAN (Vitrual Local Area Network) is a new technology that grows up in computer and the communications field in recent years, all demonstrates enormous function and potentiality aspect network performance and the manageability improving.And its most attractive advantage is its flexibility and to effective control of broadcast domain, and can carry out safe isolation to user's group.
The dividing mode of VLAN has multiple, and the method for relatively using always on the two-layer equipment is based on the hybrid mode of port port and 802.1Q agreement now.The division of VLAN and change are mainly carried out manual configuration by network management interface.
Summary of the invention
The objective of the invention is to rely on administrator configurations at the setting of VLAN in the existing VLAN cut-in method, and connect variation for networking, VLAN is provided with shortcomings such as the required maintenance workloads of situation such as change are big and proposes, switch with VLAN self adaptation access function, vid (VLAN Identifier) among the 802.1Q protocol-identifier Tag that can carry by the recognition data bag carries out the automatic adding of VLAN, and can in different VLAN groups, switch flexibly as required, reach networking requirement, a large amount of manual configuration that reduce, and for networking connection variation, VLAN is provided with situations such as change adaptability preferably.
Technical scheme of the present invention is: Ethernet Access Network VLAN access technology comprises port port and 802.1Q agreement, set up self adaptation VLAN submodule in the agreement of ethernet switching device software and functional module, self adaptation VLAN submodule can be divided into following subtask again:
1) interrupt the detection task,
2) main Processing tasks,
3) burin-in process task.
Described Ethernet Access Network VLAN access technology, it interrupts the interrupt register that the detection task is regularly inquired about chip, when the current VLAN configuration of the vid value in the Tag information that packet carries and this port does not match, can obtain the interruption of generation, and produce different Interrupt Process requests according to current VLAN configuration.
Described Ethernet Access Network VLAN access technology, its main Processing tasks is to carry out respective handling according to the interruption attribute in the Interrupt Process request, show the VLAN that does not have this vid value if interrupt attribute, then create new VLAN according to the Interrupt Process request content, the vid of this VLAN is identical with vid value in the Interrupt Process request content, and this port is added this VLAN in the Tag mode; Show the VLAN that has this vid value if interrupt attribute, but port not the member of this VLAN, then port is added corresponding VLAN in the Tag mode, when port adds VLAN (or creating VLAN) with adaptive mode, start corresponding timer.
Described Ethernet Access Network VLAN access technology, its burin-in process task are mainly handled the timer that adaptive mode adds the port of VLAN, control the life span that adaptive mode adds the VLAN of the port of VLAN or establishment in this way.Timer expiry is then deleted the port of automatic adding, create if this VLAN is an adaptive mode, and port is last member port of this VLAN, then in this port of deletion, this VLAN is also deleted.
Described Ethernet Access Network VLAN access technology, it interrupts the detection task can obtain this interruption by inquiry, and send dissimilar Interrupt Process requests to main Processing tasks according to Set For Current, interrupt content and comprise the value of vid among the VLAN Tag of the packet of receiving and corresponding ports number.
Described Ethernet Access Network VLAN access technology is to have no progeny in each inquiry, has added the time-delay of a period of time, and purpose is to control the frequency that inquiry is interrupted, as inquiring about once every 80～120ms.
Advantage of the present invention is: the switch that has added self adaptation VLAN access function is compared with the switch of this function of tool not, has remarkable advantages such as configuration is simple, safe and reliable.Can reduce webmaster expense and configuration error significantly in the networking, increase flexibility.
Description of drawings:
Fig. 1 is the schematic diagram of switching equipment system framework;
Fig. 2 interrupts detecting main Processing tasks flow chart;
Fig. 3 is main Processing tasks software flow pattern;
Fig. 4 is a burin-in process task software flow pattern;
Fig. 5 is concrete application case figure.
Embodiment:
The self adaptation vlan technology realizes on the basis of existing vlan technology.By to adding this function on the switch, then switch can be according to the VLAN attribute (value of vid in the VLAN Tag label) of packet that port is received, add among arbitrary VLAN of current existence flexibly, and can add different VLAN groups in different time sections as required, realize freely switching.
The specific implementation step is described as follows:
Fig. 1 is the schematic diagram of switching equipment system framework, whole system is divided into five layers of module, bottom hardware comprises CPU and exchange chip, the second layer is embedded OS (RTOS), and the operation platform of systems soft ware is provided, the 3rd layer of driver module, finish the functions such as register, vlan table of read-write hardware chip, the 4th layer is agreement and functional module, realizes agreement and correlation function that switching equipment is supported, and layer 5 is interface and webmaster.Self adaptation VLAN module belongs to a submodule of agreement and functional module, is based upon on the functionality of vlan module.Self adaptation functionality of vlan inside modules can be divided into following subtask again:
1) interrupt the detection task,
2) main Processing tasks,
3) burin-in process task.
Three subtasks start when the self adaptation functionality of vlan is open, run to this function always and close end.
Interruption detection task is finished the detection to the chip respective interrupt.The software flow pattern of this task such as Fig. 2.When a certain port has data to enter, exchange chip can be checked the Tag value in the packet, and judge according to the VLAN filter table in the current exchange chip, when the current VLAN configuration of the vid value in the Tag information that packet carries and this port does not match, produce and interrupt.Interrupting the detection task can obtain this interruption by the inquiry interrupt register, and sends the Interrupt Process request to main Processing tasks, comprising: interrupt type and interruption content.Interrupt type divides two kinds: a kind of is the current VLAN with this vid value that do not exist, and might as well be made as interrupt type 1; Another kind is the VLAN of this vid value of current existence, but this port is not member wherein, might as well be made as interrupt type 2.Interrupt content and comprise vid value and port numbers among the VLAN Tag of the packet of receiving.Have no progeny in each inquiry, added the time-delay of a period of time, purpose is to control the frequency that inquiry is interrupted, as inquiring about once every 100ms.As used exchange chip is Galnet2+ series (as GT48350, GT48360 etc.), and the interrupt register of being inquired about is the 0th and the Ingress Filter register of Interrupt Cause.In other main flow exchange chip corresponding interrupt register is also arranged.
Main Processing tasks module is carried out respective handling according to the Interrupt Process request that receives.Flow process such as Fig. 3: resolving the interruption attribute in the Interrupt Process request, is first kind if interrupt attribute, does not promptly have the VLAN of this vid value, then creates new VLAN, and this port is added this VLAN in the Tag mode; If interrupting attribute is second kind, promptly there is the VLAN of this vid value, then port is added corresponding VLAN in the Tag mode.When port adds VLAN (or creating VLAN) with adaptive mode, start corresponding timer.
The burin-in process task is mainly handled the timer that adaptive mode adds the port of VLAN, flow chart such as Fig. 4.Control the life span of the port (or creating VLAN) of adaptive mode adding VLAN in this way.Timer expiry is then deleted the port (or the VLAN that creates) of automatic adding.Create if this VLAN is an adaptive mode, and port is last member port of this VLAN, then in this port of deletion, this VLAN also deleted.
Explanation about interface and webmaster:
1) each port of equipment all can independently be set to open or close the self adaptation functionality of vlan.
2) with the port (or the VLAN that creates) of adaptive mode adding VLAN, on network management interface, adopt the special representation method, to distinguish over the VLAN and the port of common manual mode configuration.
3) with the port (or the VLAN that creates) of adaptive mode adding VLAN, can revise by manual configuration.Also can be understood as adaptive mode as a kind of additional configuration mode, its priority is lower than manual configuration.
The vid scope is followed 802.1Q agreement regulation among the VLAN Tag that is discerned among the present invention, is 1～4095.
Fig. 5 is concrete application case figure, as shown in the figure in the networking mode:
A. switch b connects the user, is respectively user 2～user q, and switch b is by being linked to the port Ab of switch A on the port Ba.Other has user 1 to be connected to the A3 port of switch A by switch D.Switch C Connection Service device group P is respectively server P1～server Pn, and server M1 also is connected on the switch C, and switch C is by being linked to the port Ac of switch A on the port Ca.In addition, the member server of server group M M2～server Mn directly is connected on the switch A.Here the example of Juing is a networking situation very common in the practical application.
B. in actual applications, server according to different service functions, is divided different VLAN groups.Belong to same VLAN, vid=100 as server M1～server Mn.Server P1～server Pn belongs to same VLAN, vid=300.User in the network may visit different server groups as required, needs access server group M as user 1, user 2, and all the other users need access server group P.
Common method to set up (that is: switch does not all possess the self adaptation functionality of vlan among Fig. 5):
The webmaster personnel carry out the VLAN configuration of switch-spanning according to user's needs, and each switch all will be configured, the concrete configuration method, because of switch manufacturer different with model, can be variant, at this its layoutprocedure is only described simply:
Switch A:
Configured port Ab, Ac, Ad and server M2～server Mn place port in same VLAN, vid=100; Configured port Ab, Ac in same VLAN, vid=300.Port Ab, the Ac, the Ad that link to each other with switch need be configured to the port that the Tag mode adds, and distinguish packet with the vid among the Tag and belong to which VLAN.
Switch b:
Configure user 2 place port B2 and upper united mouth Ba in same VLAN, vid=100; Dispose all the other user place ports and upper united mouth Ba in same VLAN, vid=300.Wherein first line of a couplet port Ba need be configured to the Tag port, distinguishes data with the vid among the Tag and belongs to which VLAN.
Switch C:
Configuration server M1 place port Cm and upper united mouth Ca, in same VLAN, vid=100;
Configuration server P1～server Pn place port and upper united mouth Ca, in same VLAN, vid=300; Wherein first line of a couplet port Ca need be configured to the Tag port, distinguishes data with the vid among the Tag and belongs to which VLAN.
Switch D:
Configure user 1 place port D1 and upper united mouth Da, in same VLAN, vid=100; Wherein first line of a couplet port Da need be configured to the Tag port, distinguishes data with the vid among the Tag and belongs to which VLAN.
When newly adding user or user and move, as being connected of switch b and switch A having moved to other port from port Ab, as move to port Aq.Switch A need delete the VLAN configuration of port Ab so, and adds the corresponding VLAN configuration of port Aq, its VLAN that joins the visit data of wanting is organized, to reach the demand of same visit different server group.And for example the VLAN configuration change of switch b changes vid=300 into from vid=100, and switch A also needs to change the VLAN configuration of port Ab so, deletes from the VLAN of vid=100, adds to then among the VLAN of vid=300, just can reach communicating requirement.
During the inconvenience of commonsense method is in the networking process and safeguards, need a large amount of manual configuration, and more loaded down with trivial details.Simultaneously because the complexity of VLAN configuration has increased the possibility of configuration misoperation.
Self adaptation VLAN access function solution (switch with self adaptation functionality of vlan is arranged among Fig. 5):
Might as well suppose that the switch A shown in Fig. 5 possesses the function that the VLAN self adaptation inserts, then the configuration effort amount obviously reduces, and only needs the direct switch that is connected with user side of configuration and the VLAN attribute of port:
Switch b, C, D are identical with common method to set up, and switch A only need dispose the port of Connection Service device M2～server Mn at same VLAN, and vid=300 gets final product;
Especially when switch A and switch b, when the interconnected port of switch C, switch D changes, as switch b and being connected of switch A having moved to other port from port Ab, perhaps the VLAN of switch C configuration changes, and does not need to change any configuration, but with regard to operate as normal.In addition, when new switch was connected with switch A, the switch that also only need configure new interpolation just can operate as normal, and need not to change the configuration of switch A.
We know, usually it is simple relatively directly connecting user's the switch and the VLAN configuration of port, and switch when interconnection, switch that is connected with a plurality of switches and port thereof configuration usually get up complicated, and mostly be the situation that a port belongs to a plurality of VLAN and switch-spanning configuration VLAN, also make mistakes easily.Simultaneously if move, connect situation such as variations, also need to carry out craft and revise and dispose the ability operate as normal.Obviously, the switch that has added self adaptation VLAN access function is compared with the switch of this function of tool not, have configuration simple, reduce webmaster expense, flexibly, the safe and reliable remarkable advantage that waits.
In above-mentioned applicating example, we might as well be example with user 2 access server group M, look at what how self adaptation VLAN access function was realized automatically inserting, and step is as follows:
1, the self adaptation functionality of vlan of each port of switch A is opened.
2, when user 2 needs access server group M, the B2 port of switch b is received the packet that user 2 sends, owing on switch b, disposed the VLAN that port B2, Ba belong to vid=100, and port Ba is the Tag port, transmit the rule of packet according to the VLAN of agreement 802.1Q, the packet that user 2 sends flows out from port Ba, and carries the Tag of vid=100.
3, the Ab port of switch A receives the packet of the Tag that carries vid=100 that the port Ba of switch 2 flows out, because the VLAN of vid=100 is arranged on the current switch A, but port Ab. is not the member of this VLAN, exchange chip will produce interruption, the interruption of self adaptation functionality of vlan module detects the subtask and detects this interruption, send the Interrupt Process request, comprise interrupt type in the Interrupt Process request and interrupted content, interrupt type is 2, and content comprises the port numbers of vid value 100 and port Ab.
4, the main Processing tasks of the self adaptation functionality of vlan module of switch 1 receives the Interrupt Process request, carries out respective handling according to interrupt type and content, and interrupt type is 2, then adds port Ab in the Tag mode automatically in the VLAN of existing vid=100.In this moment switch 1, server M2～server Mn place port, port Ab are the members of the VLAN of vid=100, transmit the rule of packet from the packet of receiving of port Ab according to the VLAN of agreement 802.1Q, and server M2～Mn can receive.Because network service is data interaction, the packet that sends from server M2～Mn also can pass through port Ab, port Ba and be transmitted to user 2 equally.
5, server M1 is connected on the switch C, similar with above-mentioned flow process, because in server M1 place port Cm on the switch C and the VLAN of port Ca at same vid=100, and port Ca is the Tag port, the packet that server M1 sends, Cm enters from port, transmit the rule of packet according to the VLAN of agreement 802.1Q, flow out from port Ca, and carry the Tag sign of vid=100, the port Ac of switch A receives that Tag is designated the packet of vid=100, because at switch A upper port Ac is not the member of vlan of vid=100, when port was received packet so, exchange chip can produce interruption, and the interruption of the self adaptation functionality of vlan module of same switch A detects the subtask and detects this interruption, send the Interrupt Process request, comprised interrupt type in the Interrupt Process request and interrupted content, interrupt type is 2, and content comprises the port numbers of vid value 100 and port Ac.The main Processing tasks of the self adaptation functionality of vlan module of switch A receives the Interrupt Process request, carries out respective handling according to interrupt type and content, and interrupt type is 2, then adds port Ac automatically in the VLAN of existing vid=100.Belong to the VLAN of vid=100 like this at switch 1 upper port Ac and port Ab, can intercommunication.
Through top step, each member of user 2 and server group M belongs to the VLAN of vid=100 now, can reach the purpose of intercommunication mutually.The burin-in process subtask mainly is regularly to delete the member of vlan that adaptive mode adds, and reaches the purpose that reduces redundant configuration.
At this moment, if the VLAN of switch b configuration changes, change vid=300 into as vid=100, switch A also can be according to the last also corresponding automatic renewal of flow process, the port Ab that switch b and switch is interconnected deletes from the VLAN of vid=100, join among the VLAN of vid=300, thereby realize intercommunication mutually.
Above-mentioned applicating example and realization explanation can be seen: self adaptation VLAN cut-in method advantage is can dispose automatically with real-time software to replace loaded down with trivial details network management configuration, has reduced administration overhead.For the variation of networking, adaptability is preferably arranged, do not need complicated network management configuration.
With 802.1D and the defined GVRP of 802.1Q (GARP VLAN RegistrationPotocol, wherein GARP is General Attribute Registration Protocol Generic Attribute RegistrationPotocol) protocol function compares, and self adaptation VLAN access function also has remarkable advantages:
1.GVRP the dynamic vlan technology that agreement is supported, need in switching equipment, regularly transmit a kind of GVRP protocol package literary composition, default value by agreement is 200cs, every switching equipment having opened this protocol function all regularly sends the GVRP message, need take certain bandwidth, and the self adaptation vlan technology among the present invention does not need processing protocol Bao Wen, not the occupied bandwidth resource.
2.GVRP to having relatively high expectations of other interconnect equipment.In networking, have only equipment all on the network all to support the GVRP protocol function, could realize dynamically forming the function of VLAN.And the switching equipment that has the self adaptation functionality of vlan among the present invention does not have specific (special) requirements to the miscellaneous equipment that it connected.
This function also can further be strengthened as required to the switch ports themselves with self adaptation functionality of vlan being carried out the classification restriction, the VLAN group of different stage user capture different range etc. simultaneously.Along with popularizing of the network interface card of supporting the 802.1Q agreement, the flexibility of this function is more obvious, has big using value and potentiality.This cut-in method has increased the flexibility of networking reducing the network management configuration expense significantly.
Claims (8)
1, a kind of Ethernet Access Network VLAN access technology, comprise port port and 802.1Q agreement, it is characterized in that: ethernet switching device is realized the automatic adding of VLAN by the VLANID among the VLAN ID Tag, and according to switching flexibly among the VLAN that do not coexist of vid among the packet Tag.
2, Ethernet Access Network VLAN access technology according to claim 1, it is characterized in that: the realization of self adaptation VLAN cut-in method is passed through to add self adaptation VLAN submodule in the agreement of software and functional module, and self adaptation VLAN submodule comprises three subtasks:
1) interrupt the detection task,
2) main Processing tasks,
3) burin-in process task.
3, Ethernet Access Network VLAN access technology according to claim 1 and 2, it is characterized in that interrupting the corresponding interrupt register of detection task inquiry exchange chip, when the vid value the 802.1Q protocol-identifier Tag that the packet that enters from a certain port carries and current VLAN configuration do not match, interrupt the detection task and can obtain interruption, and, send different Interrupt Process requests according to current configuration.
4, Ethernet Access Network VLAN access technology according to claim 1 and 2, it is characterized in that main Processing tasks carries out respective handling according to the interruption attribute of Interrupt Process request, show the VLAN that does not have this vid value if interrupt attribute, then create new VLAN, the vid value of the VLAN that creates is identical with vid value in the Interrupt Process request content, if and port is added this VLAN. in the Tag mode interrupt attribute and show the VLAN that has this vid value, but port is not the member of VLAN, then this port is added corresponding VLAN in the Tag mode, when port adds VLAN or creates VLAN with adaptive mode, start corresponding timer.
5, Ethernet Access Network VLAN access technology according to claim 1 and 2, it is characterized in that burin-in process task processing adaptive mode adds the timer of the port of VLAN, control the life span that adaptive mode adds the VLAN of the port of VLAN or establishment in this way, timer expiry is then deleted the port of automatic adding VLAN or the VLAN of establishment.
6, Ethernet Access Network VLAN access technology according to claim 1 and 2 is characterized in that the Interrupt Process request comprises interrupt type and interrupts content two parts, and wherein interrupt type divides two kinds:
1) the current VLAN that does not have this vid,
2) VLAN of current this vid of existence, but port is in VLAN,
Interrupt content and comprise vid value and corresponding end slogan among the VLAN Tag of the packet of receiving.
7, Ethernet Access Network VLAN access technology according to claim 1 and 2, it is characterized in that having no progeny in each inquiry, added the time-delay of a period of time, purpose is to control the frequency that inquiry is interrupted, time delay interval is the ms level, as time delay interval 80～120ms.
8, Ethernet Access Network VLAN access technology according to claim 1 and 2, it is characterized in that: each port all can independently be set to open or close this self adaptation VLAN access function as required.
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