CN1585361A - Method for realizing addressing pool share between multiple IP-DSLM - Google Patents
Method for realizing addressing pool share between multiple IP-DSLM Download PDFInfo
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- CN1585361A CN1585361A CN 200410009143 CN200410009143A CN1585361A CN 1585361 A CN1585361 A CN 1585361A CN 200410009143 CN200410009143 CN 200410009143 CN 200410009143 A CN200410009143 A CN 200410009143A CN 1585361 A CN1585361 A CN 1585361A
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Abstract
The method includes following steps: a virtual LAN is set for intercommunication between IP-DSLAM, and an address pool is set at a part of IP-DSSAM for connecting users; when IP-DSLAM starts up, first it is decided if there is an available address pool for using by users, if not, then a request for applying address field is transmitted to the IP-DSLAM with the address pool; the IP-DSLAM with the address pool decides if the allocation is available, if yes, then a permit message is transmitted, and the address field needed by request IP-DSLAM is allocated for using as local address pool by the request IP-DSLAM; if not, then a refusing message is transmitted, the IP-DSLAM continually transmits the request to the other IP-DSLAM; if there is an address pool, then the declaration message is transmitted to other IP-DSLAM, IP address is allocated to the local users; if the connected users continually increase to the a certain amount that will exceed the volume of the address pool, the addresses will be distributed and the request is transmitted to the IP-DSLAM with address pool; if the connected users in IP-DSLAM decrease, the unused address will be released.
Description
Technical field
The present invention relates to the method that a kind of address pool is shared, relate in particular to a kind of method that realizes that address pool is shared between many IP-DSLAM.
Background technology
Along with development of internet technology, broadband access has at present become a kind of leading user mode access.Broadband access generally comprises modes such as ADSL, VDSL, Ethernet, and according to the operation needs of operator, these all modes all need broadband dialing and the process that authenticates.After authentication phase is finished, also need to carry out IP address assignment usually, purpose is that like this, the end user just can communicate for user side distributes an IP.And present most of IP-DSLAM (Digital SubscriberLine Access Multiplexer) has been integrated into basic authentication (as 802.1x authentication, PPPoE authentication and termination) and IP address assignment and management function on the DSLAM equipment and has realized.Like this, higher level equipment just can substitute the BRAS of traditional application model with the three-tier switch of relative low price, thereby has reduced the construction cost of broadband access network significantly.
IP address assignment has multiple mode, mainly can be divided into two big classes: static IP distributes and dynamic IP is distributed; The static IP method of salary distribution is to specify an IP for user side in advance, after authentification of user passes through, just can communicate by letter at once; Do not have IP in advance and the dynamic IP method of salary distribution is a user side, after authentication is passed through,, obtain an IP, just can communicate by letter then by the IP address assignment process.For the dynamic IP method of salary distribution, modal is to utilize DHCP (Dynamic Host ConfigurationProtocol) agreement, and IP-DSLAM is IP address of user side dynamic assignment; When user side initiatively disconnected connection or abnormal broken line, IP-DSLAM can reclaim this IP, so that can be that other clients are distributed.DHCP is the expansion of BOOTP, is based on C/S model, and it provides the mechanism of a kind of dynamic assigned ip address and configuration parameter, and this is mainly used in the relatively place of difficulty of large network environment and configuration.DHCP has defined a kind of mechanism that can make the IP address use one section finite time, client's time limit in can redistribute this IP address.Dynamic Host Configuration Protocol server is client computer assigned ip address automatically, and its configuration parameter makes the compunication on the network become convenient and realized easily.DHCP can rent the IP address, and for the catenet that has many computers, it sometimes may be unnecessary that every computer has an IP address.Rental period is indefinite from 1 minute to 100 years, when the rental period to the time, server can use to this IP address assignment other machine.The client also can ask to use the network address and the corresponding configuration parameters of oneself liking.
At present, there is following defective in IP-DSLAM by DHCP agreement distributing IP: (1) address can not be shared, and causes waste; (2) address pool is disperseed, and is not easy management.Suppose that two IP-DSLAM device A and B are built-in with the IP address pool; The last user who connects of A can only distribute the address from the address pool of A like this, and the user of the last connection of B can only distribute the address from the address pool of B; In order to satisfy the needs that the full configuration user reaches the standard grade simultaneously, A and B must have a big address pool like this, can actually insert the user not for a long time, cause the waste of precious IP resource; If dispose a little address pool, the situation that the user can't surf the Net because can not get IP can occur again; Simultaneously,, cause the very big inconvenience of management, hindered the whole network planning of network manager and drawn because address pool is disperseed.
At present, at inflexible shortcoming of above-mentioned distributing IP address, have a kind of by expanding the method that DHCP realizes that share in the IP address pond between many IP-DSLAM.Its main feature is: after certain specific PPPoE authentification of user passes through, begin to apply for IP, if there is IP available this locality, then distribute an available address from local pool; Do not have available address as this locality, then construct the ip-request message, the server the highest to long-range priority applies for, is not applied the person then and returns an IP available address.Above-mentioned distribution method is no problem, generally, also can normally not surf the Net because of the performance impact user.But in some cases, may bring performance issue, for example: if having only a device can serve as server in a group, remaining device can only be as common client; Like this, each client will send the message of application IP addresses and address release continually to server; When number of users is more, may cause application IP addresses slow.
Each client can be along with the increase of user's request of reaching the standard grade, and constantly to the server applied address; This process is frequent and long-term, can cause client and server always to have the mutual of application IP addresses or release message; When user's going on line or off line is frequent, can increase the weight of the burden of server, cause the direct decline of its disposal ability, cause bandwidth to reduce.
Summary of the invention
At the existing problem and shortage of method that share in existing IP address pond, the present invention proposes the method that address pool is shared between the many IP-DSLAM of realization of the message interaction of application IP addresses and release between a kind of client of minimizing and the server.
The present invention is achieved in that a kind of method that realizes that address pool is shared between many IP-DSLAM, may further comprise the steps:
Dispose the VLAN that communicates with one another at the IP-DSLAM equipment room, and the address pool of family use for connection is set on part IP-DSLAM;
During the IP-DSLAM device start, at first judge and self have or not the address pool that to use for the user, if zero-address pond, then send the request message of applied address to the IP-DSLAM equipment that address pool is arranged, there is the IP-DSLAM equipment of address pool to judge whether and to distribute according to its request, if can distribute then to send and allow message, the IP-DSLAM equipment of request obtains required address pool, if cannot distribute and then send the refusal message, IP-DSLAM equipment continues have the IP-DSLAM equipment of address pool to send request to other, till obtaining the required address pond; If address pool is arranged, then send the address advertisement message to other IP-DSLAM equipment, be the local user of connection distributing IP address simultaneously;
Continue to increase when some desires to exceed the address pool capacity if IP-DSLAM go up to connect the user, distribute the address or again to the IP-DSLAM applied address that address pool is arranged; After upward the connection user reduces to some as if IP-DSLAM, discharge obsolete address, the IP-DSLAM that this address belongs to originally regains this address.
Further, this method also comprises: if IP-DSLAM is restarted or disconnect IP address that active release is applied for or the IP address of reclaiming distribution suddenly.
Further, described application and release address specifically are to carry out with the form of address field.
Further, address pool being set on the described part IP-DSLAM can be that an IP-DSLAM goes up setting.
Further, the address field of described IP-DSLAM application is fixed with desire connection number of users.
The present invention is actually by configuration address pond on or several IP-DSLAM, then other IP-DSLAM in advance a sector address section in applied address pond use as local pool; When IP-DSLAM along with the increasing of access customer number, may expand local pool so can apply for a sector address section once more to the increase in demand of number of addresses, to reduce the forwarding of IP-DSLAM Address requests to each other; When the access user of IP-DSLAM is rolled off the production line gradually, local pool may exceed actual use amount, so can discharge the address number that certain address field reduces local address pool, take and waste to reduce the address, these d/d address fields can be used by other IP-DSLAM application again simultaneously.The invention enables address assignment quickness and high efficiency more, in the application IP addresses, the mutual number between IP-DSLAM reduces to minimum, and reliability and performance are greatly improved.The unified networking in convenient simultaneously office side plans and manages because only need manage one or several have the IP-DSLAM of pre-configured address pool to get final product.The present invention makes that by the dynamic application and the release of address field the message interaction number about the IP application IP addresses significantly reduces between client and the server, has improved the utilance of IP, has improved the treatment effeciency of server, reduces the waste rate of IP simultaneously.And, can change single configuration mode of planting, promptly the interior configurable a plurality of server of group are each server configured in advance one sector address, greatly facilitate the management of office side.
Description of drawings
Below in conjunction with accompanying drawing, the present invention is made detailed description.
Fig. 1 is the address pool shared group web frame schematic diagram of IP-DSLAM of the present invention.
Embodiment
As shown in Figure 1, application structure of the present invention is as figure, wherein: A:Radius Server server; B:Internet; C:L3 Switch is used to converge L2 Switch; D:L2 Switch; E:IP-DSLAM; F: user.And finish distribution to IP address by the built-in DHCP-SERVER of IP-DSLAM.
The present invention at first is or several IP-DSLAM configuration address ponds in the group, and configuration of IP-DSLAM used vlan that communicates with one another makes IP-DSLAM can finish the IP address pool and shares simultaneously.And, owing to address pool can be shared, so can manage concentratedly to user's IP address.
When IP-DSLAM restarts, or Dynamic Host Configuration Protocol server is when restarting, IP-DSLAM at first judges the local pre-configured address pool that whether has, as this locality the fixed address pond is arranged, then this device type is SERVER, here, SERVER can only make the IP-DSLAM distribution address field that non-SERVER uses to other, can not be to other IP-DSLAM applied address section of using as SERVER; As local no fixed address pond, then this device type is CLIENT, and here, CLIENT can only can not distribute address field to IP-DSLAM to other as the IP-DSLAM applied address section that SERVER uses.
Then between the IP-DSLAM by broadcasting packet (DHCP_TYPE_REBOOT) with collect message (DHCP_TYPE_REBOOT_ACK) and carry out each other study, i.e. record MAC and IP each other; During initial learn, send IP address field application (DHCP_TYPE_IP_BATCH_REQUEST) to the long-range IP-DSLAM that address pool is arranged, apply for a sector address section, here, the size of address field specifically is to determine according to this locality possible access customer number and other management strategy; The message (DHCP_TYPE_IP_BATCH_ACK) of the IP address field application success or not that acceptance is then returned is if the address field that success is then applied for is set to local pool.Because from the address field of long-range acquisition by static allocation to this locality, so this address field becomes local address block, the IP address of address field becomes local ip address.Then apply for it if get nowhere to other IP-DSLAM.
Inserting the user when this locality constantly increases, the quantity available of local pool reduces gradually, during to a certain scope, can be according to binary exponential backoff algorithm (algorithm controllable granularity), apply for another sector address section, to long-range transmission applied address section request message, then accept dhcp address section success message once more, expand local pool.The continuation that inserts the user along with this locality increases, constantly the applied address section; After can not successfully applying for address field, begin to insert user's request separately to other IP-DSLAM transmission, to apply for single IP address for each.
If local access user is rolled off the production line gradually, behind the user offline, this locality has taken more IP address, then utilizes slow start and congestion avoidance algorithm (algorithm controllable granularity) in the imitative Transmission Control Protocol, discharges the IP address field gradually; Along with constantly rolling off the production line of user, this process can constantly repeat, to reduce the number of addresses that this locality takies.
When IP-DSLAM equipment restarts or detects abnormal conditions, judge whether this locality has applied for address field, how many address fields of no matter having applied for the how many times application, if have, initiatively send address field and discharge message (DHCP_TYPE_IP_BATCH_RELEASE), discharge the local address field that takies.If local to remote distribution address field, no matter distributed how many times and distributed how many address fields, initiatively reclaim the address field that these take, comprise be distributed to local with long-range, with the consistency of maintenance address pool.
Disposablely when for example certain client begins applied for an address field from a certain server, and the address pool of this address field as oneself, if it contains 10 addresses, when client has 8 to insert the user applies addresses, the IP address that client then can directly apply for this locality offers the user; When the user arrives a threshold value, when for example being set to 9, client comprises an address field of 10 IP addresses immediately again to the server application; If the address uses up very soon,, for example apply for 15 etc. again according to back off algorithm; If the user continues to increase and server when not having enough addresses to provide, client is that the IP address is applied in single each access user's request separately, this just is equivalent to the application method of prior art, as from the foregoing, the situation of this independent applied address is quite few, and it also is that one of above-mentioned address field application is replenished.When the user is rolled off the production line gradually, according to certain slow start or congestion avoidance algorithm, discharge 5 earlier, discharge 10 again, reduce the address number of local ip address section gradually.
Claims (5)
1, a kind of method that realizes that address pool is shared between many IP-DSLAM is characterized in that this method may further comprise the steps:
Dispose the VLAN that communicates with one another at the IP-DSLAM equipment room, and the address pool of family use for connection is set on part IP-DSLAM;
During the IP-DSLAM device start, at first judge and self have or not the address pool that to use for the user, if zero-address pond, then send the request message of applied address to the IP-DSLAM equipment that address pool is arranged, there is the IP-DSLAM equipment of address pool to judge whether and to distribute according to its request, if can distribute then to send and allow message, the IP-DSLAM equipment of request obtains required address pool, if cannot distribute and then send the refusal message, IP-DSLAM equipment continues have the IP-DSLAM equipment of address pool to send request to other, till obtaining the required address pond; If address pool is arranged, then send the address advertisement message to other IP-DSLAM equipment, be the local user of connection distributing IP address simultaneously;
Continue to increase when some desires to exceed the address pool capacity if IP-DSLAM go up to connect the user, distribute the address or again to the IP-DSLAM applied address that address pool is arranged; After upward the connection user reduces to some as if IP-DSLAM, discharge obsolete address, the IP-DSLAM that this address belongs to originally regains this address.
2, the method that address pool is shared between the many IP-DSLAM of realization as claimed in claim 1 is characterized in that this method also comprises: if IP-DSLAM is restarted or disconnection suddenly, initiatively discharge the IP address of application or reclaim the IP address of distributing.
3, the method that address pool is shared between the many IP-DSLAM of realization as claimed in claim 1 or 2 is characterized in that, described application and release address specifically are to carry out with the form of address field.
4, the method that address pool is shared between the many IP-DSLAM of realization as claimed in claim 1 is characterized in that, it can be that an IP-DSLAM goes up setting that address pool is set on the described part IP-DSLAM.
5, the method that address pool is shared between the many IP-DSLAM of realization as claimed in claim 3 is characterized in that described IP-DSLAM applied address section is fixed to desire to meet the user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009143 CN1585361A (en) | 2004-05-28 | 2004-05-28 | Method for realizing addressing pool share between multiple IP-DSLM |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410009143 CN1585361A (en) | 2004-05-28 | 2004-05-28 | Method for realizing addressing pool share between multiple IP-DSLM |
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| CN1585361A true CN1585361A (en) | 2005-02-23 |
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| CN 200410009143 Pending CN1585361A (en) | 2004-05-28 | 2004-05-28 | Method for realizing addressing pool share between multiple IP-DSLM |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008011806A1 (en) * | 2006-07-17 | 2008-01-31 | Hangzhou H3C Technologies Co., Ltd. | A multicast network deploying method, multicast network and a control server |
| WO2011035586A1 (en) * | 2009-09-23 | 2011-03-31 | 中兴通讯股份有限公司 | Method, device and system for allocating addresses in hot standby scenario |
| EP2482499A1 (en) * | 2009-09-23 | 2012-08-01 | ZTE Corporation | Method, apparatus, system for address management |
-
2004
- 2004-05-28 CN CN 200410009143 patent/CN1585361A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008011806A1 (en) * | 2006-07-17 | 2008-01-31 | Hangzhou H3C Technologies Co., Ltd. | A multicast network deploying method, multicast network and a control server |
| WO2011035586A1 (en) * | 2009-09-23 | 2011-03-31 | 中兴通讯股份有限公司 | Method, device and system for allocating addresses in hot standby scenario |
| CN102025475A (en) * | 2009-09-23 | 2011-04-20 | 中兴通讯股份有限公司 | Address allocation method, apparatus and system in hot backup scene |
| EP2482499A1 (en) * | 2009-09-23 | 2012-08-01 | ZTE Corporation | Method, apparatus, system for address management |
| EP2482499A4 (en) * | 2009-09-23 | 2013-04-24 | Zte Corp | Method, apparatus, system for address management |
| US8825904B2 (en) | 2009-09-23 | 2014-09-02 | Zte Corporation | Method, apparatus, system for address management |
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