CN100433693C - Method for dynmaic establishing virtual local network table and Ethernet equipment - Google Patents
Method for dynmaic establishing virtual local network table and Ethernet equipment Download PDFInfo
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- CN100433693C CN100433693C CNB2006101561259A CN200610156125A CN100433693C CN 100433693 C CN100433693 C CN 100433693C CN B2006101561259 A CNB2006101561259 A CN B2006101561259A CN 200610156125 A CN200610156125 A CN 200610156125A CN 100433693 C CN100433693 C CN 100433693C
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Abstract
A method for dynamically setting up table of virtual local area network includes configuring VLAN information being able to be supported by Ethernet device port, setting up relevant VLAN table when VLAN being able to use said port to support message identification is confirmed and relevant VLAN table being not existed is confirmed according to said information after message is received by port.
Description
Technical field
The present invention relates to the ethernet technology field, relate in particular to a kind of method and ethernet device of dynmaic establishing virtual local network table.
Background technology
Along with the promotion in market, the development of Ethernet is more and more rapider, uses also more and more widely.VLAN (Virtual Local Area Network, VLAN), be to be positioned at work station and server on the same physical network segment from being divided into different logical segment in logic with one group, function and the operation on and traditional LAN (Local Area Network, local area network (LAN)) basic identical, the interconnected and transmission of terminal system in the certain limit can be provided.The generation of vlan technology, for the broadcast storm in the limiting network, the aspects such as fail safe that promote local area network (LAN) all provide huge help, and therefore the application for vlan technology also is more and more general in Ethernet.
Because 802.1Q agreement regulation, VLAN ID (sign) maximum is 4095, and when the switch of network cascade was more and more, the VLAN ID resource in the network became in short supply unusually.And QinQ (802.1Qin 802.1Q (stacked VLANs), double layer VLAN) appearance of technology has effectively solved the problem of VLAN ID resource scarcity in the network, a kind of comparatively simple two-layer VPN (VirtualPrivate Network, Virtual Private Network) scheme is provided simultaneously.QinQ is the address to a kind of visualization of the tunnel protocol that encapsulates based on 802.1Q, its core concept is that user private network VLAN is encapsulated on the public network VLAN, the message band the backbone network that two-layer VLAN passes through service provider, thereby provides a kind of comparatively simple two-layer VPN tunnel for the user.
Because ethernet device is if handle message, just need the corresponding VLAN of this ethernet device support, therefore, at present, ethernet device is supported certain VLAN if desired, just need the local vlan table of creating correspondence, and this vlan table is tied on the corresponding ports, preserve the attribute information of this VLAN in this vlan table.When this port has message to handle, ethernet device obtains corresponding VLAN ID from this message Shen, search the vlan table of local this port of preserving according to this VLAN ID, after the vlan table that finds this VLAN ID correspondence, carry out relevant treatment according to the attribute information of this VLAN that wherein preserves.
As seen, present ethernet device must create the vlan table of certain VLAN earlier and vlan table is tied to certain port and just can support this VLAN at this port.Because the VLAN as lower floor's network of the ethernet device of network node divides and may change to some extent, therefore, for convenience's sake, the network manager wishes that this ethernet device can support a large amount of VLAN, the network manager can configure by disposable VLAN the needs support like this, even the VLAN of lower floor's network has changed like this, do not need to revise the configuration of this network node yet.But, when ethernet device need be supported lot of V LAN, need to create a large amount of vlan tables.After ethernet device is supported the QinQ technology, need to create 4096 * 4096 vlan tables on the port at most.If an equipment has 32 ports, need to create 4096 * 4096 * 32 vlan tables so under the extreme case.Take 2 bytes by each vlan table and calculate, these vlan tables will take the internal memory of 1G, and this is that ethernet device is unaffordable.Therefore, present a lot of ethernet devices all limit the VLAN quantity that it can be supported, and the VLAN number that ethernet device can be supported also becomes an important indicator weighing the ethernet device performance.Especially for BRAS (Broadband Remote Access Server, BAS Broadband Access Server), three-tier switch equipment such as (Layer3Switch), because these equipment generally are in the convergence-level of metropolitan area network, lower floor's network that they connect generally can be divided into a lot of VLAN, and this just needs them to have powerful VLAN tenability.
Summary of the invention
The embodiment of the invention provides a kind of method and ethernet device of dynmaic establishing virtual local network table, in order to solve the quantitatively conditional problem of VLAN that can support ethernet device in the prior art.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of method of dynmaic establishing virtual local network table, may further comprise the steps:
The information of the virtual LAN VLAN that the configuration ethernet device port can be supported; And
After described port receives message, when determining that according to described information described port can be supported the VLAN of described message identification and determine not have corresponding vlan table, for described port is created corresponding vlan table;
When the quantity of the simultaneous vlan table of described ethernet device during, the current vlan table that does not have to use is worn out greater than setting threshold.
The embodiment of the invention also provides a kind of ethernet device, comprises being used to receive and send the port of message and first memory module of preserving vlan table, and described ethernet device comprises second memory module, processing module and aging module, wherein:
The information of the virtual LAN VLAN that described second memory module preservation ethernet device port can be supported;
Described processing module is after described port receives message, when determining that according to described information this port can be supported the VLAN of described message identification and determine not have corresponding vlan table, for described port is created corresponding vlan table;
Described aging module wears out to the current vlan table that does not have to use when the quantity of the simultaneous vlan table of described ethernet device during greater than setting threshold.
In embodiments of the present invention, the information of the configuration ethernet device port VLAN that can support; And after this port receives message, when determining that according to this information this port can be supported the VLAN of this message identification and determine not have corresponding vlan table, for this port is created corresponding vlan table, when the quantity of the simultaneous vlan table of ethernet device during, the current vlan table that does not have to use is worn out greater than setting threshold.Adopt embodiment of the invention technical scheme; can break through the VLAN restriction quantitatively that to support ethernet device in the prior art; and only need small quantity of memory space to preserve the information of its VLAN that can support; thereby the reduction ethernet device is the load that the VLAN that supports under it bears, and has protected the resource of ethernet device.
Description of drawings
Fig. 1 is the flow chart of dynamic creation vlan table in the embodiment of the invention;
Fig. 2 is the flow chart of the aging mechanism that determines whether to start vlan table in the embodiment of the invention;
Fig. 3 is the flow chart of method two in the aging mechanism of vlan table in the embodiment of the invention;
Fig. 4 is a system block diagram of ethernet device in the embodiment of the invention;
Fig. 5 is another system block diagram of ethernet device in the embodiment of the invention.
Embodiment
Because the VLAN quantity of the message correspondence by ethernet device in a period of time can be not a lot, therefore, the VLAN quantity that ethernet device needs to support simultaneously can be not a lot of yet, the present invention can utilize this characteristics dynamic creation VLAN of ethernet device, makes ethernet device can support lot of V LAN.
In the present embodiment, the information of the configuration ethernet device port VLAN that can support; And after this port receives message, when determining that according to this information this port can be supported the VLAN of this message identification and determine not have corresponding vlan table, for this port is created corresponding vlan table.
Below in conjunction with accompanying drawing present embodiment is done description further.
In the present embodiment, in ethernet device, increase a VLAN allocation list, be used to preserve the information of the VLAN that each port of ethernet device can support respectively.This VLAN allocation list can generate when the network manager disposes for the first time.For example, the network manager at first be ethernet device a port arrangement its can supported vlans ID from 1 to 1024 VLAN, at this moment, will generate a VLAN allocation list on the ethernet device, has only a node in this table, this nodes records the vlan information of this configuration, because configuration is the continuous VLAN of VLAN ID, therefore, only need record start VLAN ID ' 1 ' and finish VLAN ID ' 1024 ' represent can supported vlans ID from 1 to 1024 VLAN just passable, need occupation space very little.When the network manager disposed the VLAN that this port can also supported vlans ID from 2048 to 4094 again, then ethernet device will be created a node again in this allocation list, writes down this configuration information.
Because increased the information that the VLAN allocation list is preserved the VLAN that ethernet device each port can support respectively in the present embodiment, therefore, the flow process of dynamic creation vlan table may further comprise the steps as shown in Figure 1 in the present embodiment:
When this port receives message, judge whether this port can be supported the VLAN of this message identification but do not have corresponding vlan table, and when determining to support the VLAN of this message identification but not having corresponding vlan table, for this port is created corresponding vlan table.
Step S101, ethernet device receive a message;
Step S102, the vlan table of the local port correspondence that receives this message of preserving of inquiry if there is the vlan table of the VLAN ID correspondence that this message carries, then directly finishes; Otherwise carry out step S103;
Step S103, the local VLAN allocation list of preserving of inquiry judges whether ethernet device can support the VLAN of this VLAN ID correspondence, if carry out step S104, otherwise directly finish;
Step S104 is for this port is created this vlan table.
As seen, adopt the technical scheme of present embodiment, under opposite extreme situations, the network manager can dispose all VLAN under the port, for example dispose VLAN 1～4094 QinQ 1～4094, only need a node just can write down this in the VLAN allocation list and disposed.As seen, in this case, this port is after receiving message, as long as when judging the vlan table that does not have the VLAN ID correspondence that this message carries, will create a new vlan table, if bottom-layer network does not stop to change like this, 4094 * 4094 these ports then finally may have been created to deserved vlan table.If the N of Ethernet port can both be supported all VLAN under it, then ethernet device finally may have been created 4094 * 4094 * N vlan table.So the system resource that takies of multi-VLAN table is that ethernet device is difficult to bear.And because as mentioned before, the VLAN quantity of the message correspondence by this equipment in a period of time can be not a lot, and promptly in a period of time, some vlan table is less than using, in order to alleviate the load of ethernet device, can be to not wearing out at the vlan table that uses.
In order not wear out at the vlan table that uses to having, in the present embodiment, every successfully the establishment after the vlan table, ethernet device carries out flow process as shown in Figure 2, may further comprise the steps:
Step S201 adds 1 with the quantity of the vlan table of current existence;
Ethernet device can local quantity of preserving the vlan table of this current existence.
Step S202, whether the quantity that detects this simultaneous vlan table is greater than setting threshold, if carry out step S203, otherwise directly finish;
Step S203, the aging mechanism of startup vlan table.
When specific implementation, also can be not do not carry out above-mentioned detection after successfully creating a vlan table, but whether the quantity that can periodically detect existing vlan table is greater than setting threshold, and carries out respective handling according to testing result every.
In the present embodiment, provide the aging mechanism of multiple vlan table, for example:
Method one
When there is the online user in ethernet device as the VLAN under its each port, this online user's of record user profile in corresponding vlan table, then after the aging mechanism of vlan table starts, whether there is user profile in the inquiry vlan table, and when determining not have user profile, deletes corresponding vlan table.
With BRAS equipment is example, and online user's number that it can be supported is conditional, and each user can only belong to a VLAN, and the number that is to say the vlan table that is using is limited.Such as certain BRAS equipment can only be supported 10000 users, and to have only 10000VLAN table be useful this section moment so, and other vlan table useless just can wear out.Therefore, the setting threshold of the simultaneous vlan table of this BRAS equipment can be 10000, and still, in order to prevent to create repeatedly, delete vlan table, aging mechanism is restarted in suggestion when the vlan table number of creating surpasses the number of users twice of equipment permission access.
When specific implementation, after the aging mechanism of vlan table starts, can travel through the local vlan table of preserving of ethernet device, also can be according to the query portion vlan table is set, for example, just inquire about the vlan table of certain port of ethernet device and do not have the vlan table of the online VLAN correspondence of user to delete this port, in concrete processing, may only delete certain port does not have the vlan table of the online VLAN correspondence of user just can make the quantity of the simultaneous vlan table of ethernet device be not more than setting threshold, the vlan table quantity of disposable deletion is less relatively when handling like this, can avoid creating repeatedly and deleting a large amount of vlan tables.
Method two
If ethernet device receives or sends message at each port, then do a mark and represent that this vlan table uses at corresponding vlan table, after the aging mechanism of vlan table started, ethernet device carried out flow process as shown in Figure 3, may further comprise the steps:
Step S301, whether the vlan table of inquiring about current existence exists mark, if, carry out step S302, otherwise, carry out step S303;
In this step, can travel through the local vlan table of preserving of ethernet device, also can be according to the query portion vlan table is set.
Step S302 removes corresponding mark, finishes;
Step S303 deletes corresponding vlan table.
As seen, by above-mentioned flow process, after the mark of a vlan table was eliminated, if inquire about still there is not mark when whether it exists mark in next time, promptly corresponding during this period VLAN did not handle message, and then this vlan table can be deleted.
When specific implementation, can in inquiring a vlan table each time, not exist this mark just to delete this vlan table afterwards, but do not delete this vlan table again after can in inquiring a vlan table, not existing this mark to reach set point number.
In addition, be different from the above-mentioned method that in vlan table, makes marks, if ethernet device receives or sends message at each port, can also be at timestamp information of corresponding vlan table record, be used for that mark receives or send time of message, and after the aging mechanism of vlan table started, ethernet device can wear out to VLAN according to this timestamp information.
Need to prove that the pairing method of the above-mentioned embodiment of the invention of mentioning can be stored in the computer read/write memory medium.
Ethernet device in the present embodiment as shown in Figure 4, comprises the port one 00 and first memory module 200, and in order to realize the dynamic creation vlan table, the ethernet device in the present embodiment also comprises second memory module 300 and processing module 400, wherein:
Port one 00 receives and sends message;
The information of the VLAN that second memory module, 300 preservation ethernet device port ones 00 can be supported;
As shown in Figure 5, processing module 400 can comprise first judging unit 401 and second judging unit 402, wherein:
The information that second judging unit 402 is preserved according to second memory module 300 judges whether port can be supported the VLAN of this message identification and export judged result.
Ethernet device in the present embodiment can comprise aging module 500, wherein:
Aging module 500 does not have the vlan table of use to wear out when the quantity of the simultaneous vlan table of ethernet device during greater than setting threshold to current.
Because aging module 500 can judge behind each establishment vlan table that therefore, processing module 400 is notified aging module 500 create vlan table in first memory module 200 after;
Aging module 500 is handled according to this notice.
To the method one that reply is not worn out at the vlan table that uses, ethernet device can comprise control module, is used for the user profile of the online user of record corresponding VLAN in the vlan table of first memory module 200;
Whether there is user profile in the vlan table in aging module 500 inquiries first memory module 200, and when determining not have user profile, deletes corresponding vlan table.
To the method two that reply is not worn out at the vlan table that uses, ethernet device can comprise mark module, is used for when port receives or send message, and the corresponding vlan table of mark uses in first memory module 200;
Whether the vlan table in aging module 500 inquiries first memory module 200 exists mark, if remove mark; Otherwise, delete corresponding vlan table.
Adopt the present embodiment technical scheme, under extreme case, network manager's configuration ethernet equipment can be supported all VLAN under it, then how to change no matter the VLAN of bottom-layer network divides, all no longer need manual intervention, alleviated network manager's work load greatly.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1, a kind of method of dynmaic establishing virtual local network table is characterized in that, may further comprise the steps:
The information of the virtual LAN VLAN that the configuration ethernet device port can be supported; And
After described port receives message, when determining that according to described information described port can be supported the VLAN of described message identification and determine not have corresponding vlan table, for described port is created corresponding vlan table;
When the quantity of the simultaneous vlan table of described ethernet device during, the current vlan table that does not have to use is worn out greater than setting threshold.
2, the method for claim 1, it is characterized in that, after described port receives message, judge whether described port exists the vlan table of described message correspondence earlier, when determining not exist, judge again whether described port can support the VLAN of described message identification.
3, the method for claim 1 is characterized in that, when creating vlan table, whether the quantity of judging the simultaneous vlan table of described ethernet device is greater than setting threshold periodically or each.
4, method as claimed in claim 3 is characterized in that, the online user's of record corresponding VLAN user profile in vlan table;
The concrete grammar that the current vlan table that does not have to use is worn out is: whether have user profile in the inquiry vlan table, and delete corresponding vlan table when determining not have user profile.
5, method as claimed in claim 3 is characterized in that, when described port received or send message, the corresponding vlan table of mark used;
The concrete grammar that the current vlan table that does not have to use is worn out is: whether the inquiry vlan table exists mark, if remove described mark; Otherwise, delete corresponding vlan table.
6, a kind of ethernet device comprises being used to receive and send the port of message and first memory module of preserving vlan table, it is characterized in that described ethernet device comprises second memory module, processing module and aging module, wherein:
The information of the virtual LAN VLAN that described second memory module preservation ethernet device port can be supported;
Described processing module is after described port receives message, when determining that according to described information this port can be supported the VLAN of described message identification and determine not have corresponding vlan table, for described port is created corresponding vlan table;
Described aging module wears out to the current vlan table that does not have to use when the quantity of the simultaneous vlan table of described ethernet device during greater than setting threshold.
7, ethernet device as claimed in claim 6 is characterized in that, described processing module comprises first judging unit and second judging unit, wherein:
Described first judging unit is judged the vlan table that whether has described message correspondence in described first memory module when described port receives message, and is determining to notify when not existing described second judging unit;
The information that described second judging unit is preserved according to described second memory module judges whether described port can be supported the VLAN of described message identification and export judged result.
8, ethernet device as claimed in claim 6 is characterized in that, described processing module is notified described aging module create vlan table in described first memory module after;
Described aging module is handled according to described notice.
9, ethernet device as claimed in claim 8 is characterized in that, described ethernet device comprises control module, is used for the user profile of the online user of record corresponding VLAN in the vlan table of described first memory module;
Described aging module inquires about in the vlan table in described first memory module whether have user profile, and deletes corresponding vlan table when determining not have user profile.
10, ethernet device as claimed in claim 8 is characterized in that, described ethernet device comprises mark module, is used for when described port receives or send message, and the corresponding vlan table of mark uses in described first memory module;
Whether the vlan table that described aging module is inquired about in described first memory module exists mark, if remove described mark; Otherwise, delete corresponding vlan table.
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| CNB2006101561259A CN100433693C (en) | 2006-12-27 | 2006-12-27 | Method for dynmaic establishing virtual local network table and Ethernet equipment |
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| CNB2006101561259A CN100433693C (en) | 2006-12-27 | 2006-12-27 | Method for dynmaic establishing virtual local network table and Ethernet equipment |
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| CN1976312A CN1976312A (en) | 2007-06-06 |
| CN100433693C true CN100433693C (en) | 2008-11-12 |
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| CN104519052B (en) * | 2014-12-02 | 2017-06-20 | 重庆尊贤科技有限公司 | The lower multi-internet integration transmission method of the multiple vlan of one family one binding authentication mechanism outlets |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5949783A (en) * | 1997-09-08 | 1999-09-07 | 3Com Corporation | LAN emulation subsystems for supporting multiple virtual LANS |
| CN1474564A (en) * | 2002-08-05 | 2004-02-11 | ��Ϊ��������˾ | Communication method between virtual local area webs |
| US20040047352A1 (en) * | 1999-10-22 | 2004-03-11 | Dell Usa L.P. | Site-to-site dynamic virtual local area network |
| CN1540931A (en) * | 2003-04-22 | 2004-10-27 | 华为技术有限公司 | Method for hot backing up creation and delection of virtual local area network in exchanger |
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- 2006-12-27 CN CNB2006101561259A patent/CN100433693C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5949783A (en) * | 1997-09-08 | 1999-09-07 | 3Com Corporation | LAN emulation subsystems for supporting multiple virtual LANS |
| US20040047352A1 (en) * | 1999-10-22 | 2004-03-11 | Dell Usa L.P. | Site-to-site dynamic virtual local area network |
| CN1474564A (en) * | 2002-08-05 | 2004-02-11 | ��Ϊ��������˾ | Communication method between virtual local area webs |
| CN1540931A (en) * | 2003-04-22 | 2004-10-27 | 华为技术有限公司 | Method for hot backing up creation and delection of virtual local area network in exchanger |
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