CN102387222B - Address distribution method, apparatus and system thereof - Google Patents

Abstract

The embodiment of the present invention discloses an address allocation method, device and system, wherein the method includes: the address pool management server receives the address request message sent by the first BRAS in the broadband remote access server BRAS cluster, and the address pool management The server includes current idle address information of each BRAS in the BRAS cluster; according to the current idle address information of each BRAS in the BRAS cluster, sends the idle address of the second BRAS in the BRAS cluster to the first BRAS, to allocate the idle address of the second BRAS to the terminal equipment connected to the first BRAS. The technical solution provided by the embodiment of the present invention ensures that the address pool management server uniformly manages and allocates addresses in the BRAS cluster, thereby effectively improving the efficiency of address allocation and use.

Description

Address allocation method, device and system

technical field

The present invention relates to the field of network technology, in particular to an address allocation method, device and system.

Background technique

With the rapid development of the Internet, the number of broadband users has surged, and the demand for IPv4 addresses has shown a surge.

At present, telecom operators usually place a certain proportion of public network IPv4 addresses for each Broadband Remote Access Server (BRAS for short) or Gateway GPRS Support Node (GGSN for short) as an address pool. When the utilization rate of the address pool of each BRAS or GGSN reaches a certain saturation value, the administrator places more addresses into the address pool. Specifically, the address usage peak in the BRAS address pool where the residential users are located is from 20:00 to 24:00 in the evening, and the address idle rate in the address pool is very high at other times, while the address pool in the BRAS address pool where the office building area is located Address usage peaks during the working day, and most of the addresses in the address pool are idle at night. The administrator needs to monitor the usage status of the address pool of each device at any time. When the address usage rate in the address pool is high, the administrator needs to add addresses to the address pool in time, otherwise the user will not be able to access the Internet, and the address usage rate is low. The administrator also needs to allocate idle addresses to other address pools with insufficient resources.

Therefore, the manual address pool management in the prior art is cumbersome, and the independent management of each BRAS address pool results in low address allocation and use efficiency, which cannot meet the requirements of network resources.

Contents of the invention

In view of this, the embodiments of the present invention provide an address allocation method, device and system, which can solve the problems of cumbersome manual address pool management and low efficiency of address allocation and use in the prior art.

In order to achieve the above purpose, an embodiment of the present invention provides an address allocation method, including:

The address pool management server receives the address request message sent by the first BRAS in the broadband remote access server BRAS cluster, and the address pool management server includes the current idle address information of each BRAS in the BRAS cluster;

According to the current idle address information of each BRAS in the BRAS cluster, send the idle address of the second BRAS in the BRAS cluster to the first BRAS, so as to allocate the idle address of the second BRAS to the first BRAS. A BRAS-connected terminal device.

The embodiment of the present invention also provides an address allocation method, including:

The first broadband remote access server BRAS receives the address request message sent by the terminal device;

According to the idle address information contained in the first BRAS, if it is determined that there is no idle address in the first BRAS, sending the address request message to an address pool management server;

Receiving the idle address of the second BRAS sent by the address pool management server, the first BRAS and the second BRAS both belong to the BRAS cluster;

Send the idle address of the second BRAS to the terminal device.

The embodiment of the present invention also provides an address pool management server, including:

The receiving module is used to receive the address request message sent by the first BRAS in the broadband remote access server BRAS cluster, and the address pool management server includes the current idle address information of each BRAS in the BRAS cluster;

The first allocation module is configured to send the idle address of the second BRAS in the BRAS cluster to the first BRAS according to the current idle address information of each BRAS in the BRAS cluster, so as to assign the idle address of the second BRAS to the first BRAS. Addresses are assigned to terminal devices connected to the first BRAS.

The embodiment of the present invention also provides a broadband remote access server, including:

The first receiving module is configured to receive an address request message sent by the terminal device;

A determining module, configured to send the address request message to an address pool management server if it is determined that there is no idle address in the BRAS according to the idle address information contained in the broadband remote access server BRAS;

The second receiving module is configured to receive idle addresses of other BRASs sent by the address pool management server, the BRAS and the other BRASs all belong to the BRAS cluster;

The second allocating module is configured to send the idle address of the other BRAS to the terminal device.

The embodiment of the present invention also provides an address allocation system, including:

Broadband remote access server BRAS cluster, the BRAS cluster includes the above-mentioned multiple broadband remote access servers;

An address pool management server communicating with each BRAS in the BRAS cluster, the address pool management server adopts the above address pool management server.

The embodiment of the present invention also provides an address allocation system, including: a broadband remote access server BRAS cluster, the BRAS cluster includes a plurality of the above-mentioned broadband remote access servers, and one BRAS in the BRAS cluster uses the above-mentioned address pool management server .

The embodiment of the present invention uses the address pool management server to uniformly manage the address pools of the BRASs in the BRAS cluster. When a certain BRAS in the BRAS cluster needs to allocate an address for a terminal device and there is no free address locally, the BRAS can send the address to the address pool. The pool management server sends an address request message, and then the address management server can allocate free addresses in other BRASs to terminal devices that need addresses according to the address pool information under its unified management. Therefore, the method provided in this embodiment can automatically and uniformly manage the address pools in the BRAS cluster, and can improve the efficiency of address allocation and use.

Description of drawings

FIG. 1 is a schematic flowchart of an address allocation method provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic flowchart of an address allocation method provided by Embodiment 2 of the present invention;

Fig. 3 is a system network architecture diagram applied in the method embodiment shown in Fig. 2;

FIG. 4 is a schematic flowchart of an address allocation method provided by Embodiment 3 of the present invention;

Fig. 5 is a system network architecture diagram applied to the method embodiment shown in Fig. 4;

FIG. 6 is a schematic flowchart of an address allocation method provided in Embodiment 4 of the present invention;

FIG. 7 is a schematic structural diagram of an address pool management server provided in Embodiment 5 of the present invention;

FIG. 8 is a schematic structural diagram of an address pool management server provided in Embodiment 6 of the present invention;

FIG. 9 is a schematic structural diagram of a broadband remote access server provided by Embodiment 7 of the present invention;

FIG. 10 is a schematic diagram of an address allocation system provided by Embodiment 8 of the present invention;

FIG. 11 is a schematic diagram of an address allocation system provided by Embodiment 9 of the present invention;

FIG. 12 is a schematic diagram of an address allocation system provided by Embodiment 10 of the present invention;

FIG. 13 is a schematic diagram of an address allocation system provided by Embodiment 11 of the present invention.

Detailed ways

Fig. 1 is a schematic flow chart of an address allocation method provided in Embodiment 1 of the present invention, the method comprising:

Step 101, the address pool management server receives the address request message sent by the first BRAS in the BRAS cluster of broadband remote access servers, and the address pool management server includes current idle address information of each BRAS in the BRAS cluster.

The first BRAS in this embodiment may be any BRAS that sends an address request in the BRAS cluster.

Wherein, the first BRAS includes free address information in the first BRAS address pool, and when the first BRAS receives the address request message sent by the terminal device, it determines whether there is a free address according to the free address information in the first BRAS address pool, and if there is , then directly send the free address to the terminal device, otherwise, send the address request message sent by the terminal device to the address pool management server.

Step 102, according to the current idle address information of each BRAS in the BRAS cluster, send the idle address of the second BRAS in the BRAS cluster to the first BRAS, so as to allocate the idle address of the second BRAS to the The terminal device connected to the first BRAS.

The address pool management server in this embodiment includes the free address information in the current address pools of each BRAS in the BRAS cluster, and the address pool management server determines that there is a second address with free addresses according to the free address information in the current address pools of each BRAS. BRAS, wherein, the second BRAS is any BRAS that has an idle address in the BRAS cluster, and assigns the idle address of the second BRAS to the terminal equipment connected to the first BRAS, specifically: the address pool management server sends an address allocation message to The first BRAS. The first BRAS forwards the address allocation message to the terminal device, where the address allocation message includes idle address information of the allocated second BRAS.

Therefore, the embodiment of the present invention uses the address pool management server to uniformly manage the address pools of the BRASs in the BRAS cluster. The address pool management server sends an address request message, and then the address management server can allocate free addresses in other BRASs to terminal devices that need addresses according to the address pool information under its unified management. Therefore, the method provided in this embodiment can automatically and uniformly manage the address pools in the BRAS cluster, and can improve the efficiency of address allocation and use.

Figure 2 is a schematic flow chart of the address allocation method provided by Embodiment 2 of the present invention, and Figure 3 is a system network architecture diagram applied to the method embodiment shown in Figure 2, as shown in Figures 2 and 3, a server is configured outside the BRAS cluster It is used to perform the work of the above address pool management server. As the active address pool management server, configure another server outside the BRAS cluster as the backup address pool management server. When the active address pool management server cannot work, execute the active address pool management server. The work of the management server; there are 6 BRASs in the BRAS cluster. Among them, when the No. 1 BRAS needs to allocate addresses for its terminal equipment and the No. 1 BRAS has no free address locally, the No. 1 BRAS sends a message to the active address pool management server. Address request message, the method for performing address allocation by the active address pool management server is shown in Figure 2:

Step 201, the active address pool management server receives the address request message sent by the No. 1 BRAS.

Step 202: According to the current address pool information of each BRAS stored locally by the active address pool management server, determine that there are idle addresses in the address pool of the No. 2 BRAS, and allocate the idle addresses in the No. 2 BRAS in sequence.

In this embodiment, the active address pool management server periodically (such as every 5 seconds) receives the address pool information sent by each BRAS in the BRAS cluster, wherein the address pool information includes the address list and free addresses in the address pool information, the active address pool management server determines idle addresses according to the current address pool information of each BRAS, and arranges the idle addresses in order according to the address list, and then binds the idle addresses arranged in order to the respective BRASs to which they belong. determined and stored in the address pool information database.

In this embodiment, the active address pool management server queries the current address pool information of other No. 2 to No. 5 BRASs stored in the address pool information database in sequence, and if there is a free address in No. 2 BRAS, then allocates the address pools in No. 2 BRAS in sequence. Idle addresses, specifically: the active address pool management server sends an address allocation message to No. 1 BRAS, the address allocation message includes the allocated idle address information in No. 2 BRAS, and No. 1 BRAS sends the address allocation message to the connected terminal equipment.

In this embodiment, if the No. 2 BRAS does not have an idle address, the active address pool management server continues to inquire about the address pool information of other BRASs in the address pool information database, determines that there are other BRASs with idle addresses, and then assigns the idle addresses in other BRASs by The sequence is assigned to the terminal equipment connected to No. 1 BRAS.

As shown in FIG. 3 , the standby address pool management server in this embodiment is a server outside the BRAS cluster. When the active address pool management server fails to work normally, it can perform the work of the active address pool management server. In this embodiment, the standby address pool management server also periodically (such as every 5 seconds) receives the address pool information sent by each BRAS in the BRAS cluster, wherein the address pool information includes the address list and free addresses in the address pool information, the standby address pool management server determines the idle addresses according to the current address pool information of each BRAS, and arranges the idle addresses in order according to the address list, and then binds the idle addresses arranged in order to the BRASs to which they belong and stored in the address pool information database of the standby address pool management server.

Therefore, the embodiment of the present invention adopts the active address pool management server to uniformly manage the address pools of the BRASs in the BRAS cluster, and allocate idle addresses in the BRAS cluster in an orderly manner, improving the efficiency of address allocation and use.

At the same time, the embodiment of the present invention adopts the method of the standby address pool management server to ensure that when the main address pool management server fails, the work of the main address pool management server is executed to ensure the safe operation of the system.

Since the active address pool management server and the backup active address pool management server are servers outside the BRAS cluster, the network load of the BRAS cluster can be reduced.

Figure 4 is a schematic flow chart of the address allocation method provided by Embodiment 3 of the present invention, and Figure 5 is a system network architecture diagram applied to the method embodiment shown in Figure 4, there are 6 BRASs in the BRAS cluster, and the selected BRAS in the BRAS cluster One BRAS is used as the active address pool management server, hereinafter referred to as the active BRAS, and another BRAS in the BRAS cluster is selected as the standby address pool management server, hereinafter referred to as the standby BRAS; the method for performing address allocation by the system is shown in Figure 4:

Step 401, the active BRAS receives the address request message sent by the No. 2 BRAS in the BRAS cluster.

As shown in Figure 5, assuming that the IP address pool of No. 1 BRAS is the largest, the router path identifier (ROUTE ID) in the OSPF domain is selected through a unique identifier similar to Open Shortest Path First (Open Shortest Path First, hereinafter referred to as OSPF). The No. 1 BRAS is the active BRAS, and is responsible for performing the work of the active address pool management server in the second embodiment above.

After the No. 2 BRAS determines that there is no idle address in the No. 2 BRAS according to the local idle address information, it sends the address request message sent by the terminal device to the active BRAS.

Step 402: According to the current local address pool information of each BRAS, it is determined that there are free addresses in the address pool of the No. 3 BRAS, and the free addresses in the No. 3 BRAS are allocated in sequence.

Before this step, the active BRAS periodically receives the address pool information sent by each BRAS. The address pool information includes the address list and idle address information of each BRAS address pool. The active BRAS updates the local current address pool information according to the address pool information sent by each BRAS. The address pool information of each BRAS is specifically to arrange the idle address information in each BRAS according to the address list in order, and bind the idle addresses arranged in order with each BRAS, and then store the bound information of each BRAS address pool In the address pool information database of the active BRAS, the active BRAS queries the address pool information of other BRASs in the address pool information database in sequence, and if it is determined that No. 3 BRAS has free addresses, it sends the free addresses in No. 3 BRAS in sequence To the No. 2 BRAS, the No. 2 BRAS allocates the free address of the No. 3 BRAS to the terminal equipment.

If the No. 3 BRAS does not have an idle address, it will continue to query the address pool information database to determine other BRASs with idle addresses, and allocate the idle addresses of other BRASs in sequence.

As shown in Figure 5, the standby BRAS is another BRAS in the BRAS cluster, and can also be elected through a unique identifier ROUTE ID similar to OSPF. For example, No. 6 BRAS with the second largest IP address pool is recommended as the standby BRAS, which is responsible for implementing the second embodiment above The work of the standby address pool management server is enabled when the active BRAS fails to work normally, and performs the work of the active BRAS.

Therefore, in the embodiment of the present invention, the active BRAS and the backup BRAS are selected in the BRAS cluster to manage the address pools of the BRASs in the cluster in a unified manner, and orderly allocate the idle addresses in each BRAS, which can also realize the management of each BRAS in the BRAS cluster. The address pool of the BRAS is managed in a unified manner, which can improve the efficiency of address allocation and use.

It should be noted that, the active address pool management server and the backup address pool management server in the above embodiment can be servers other than the clustered BRAS, or the active address pool management server can be a server other than the clustered BRAS server, and the standby address pool management server can be a server other than the clustered BRAS server. The address pool management server is one of the BRASs in the BRAS cluster; or the active address pool management server is one of the BRASs in the BRAS cluster, and the standby address pool management server is a server outside the clustered BRAS server.

FIG. 6 is a schematic flowchart of an address allocation method provided in Embodiment 4 of the present invention, the method includes:

Step 601, the first broadband remote access server BRAS receives an address request message sent by a terminal device.

Step 602: If it is determined according to the idle address information contained in the first BRAS that there is no idle address in the first BRAS, send the address request message to the address pool management server.

In this embodiment, the first BRAS includes local address pool information, and the address pool information includes idle address information.

If it is determined according to the idle address information included in the first BRAS that there is an idle address in the first BRAS, assigning the idle address of the first BRAS to the terminal device.

Step 603, receiving the idle address of the second BRAS sent by the address pool management server, both of the first BRAS and the second BRAS belong to the BRAS cluster.

Wherein, the first BRAS is any BRAS in the BRAS cluster that sends the address request message, and the second BRAS is any BRAS in the BRAS cluster that has an idle address.

The address pool management server in this embodiment adopts the address pool management server in the embodiment shown in FIG. 1 , and its functions and working principles are as described above and will not be repeated here.

Step 604: Send the idle address of the second BRAS to the terminal device.

In the embodiment of the present invention, when a certain BRAS in the BRAS cluster needs to allocate an address for a terminal device and there is no free address locally, the BRAS can send an address request message to the address pool management server, and then the address management server can manage The address pool information in the BRAS allocates free addresses in other BRASs to terminal devices that need addresses. Therefore, the method provided by this embodiment can improve the efficiency of address allocation and use.

FIG. 7 is a schematic structural diagram of an address pool management server provided in Embodiment 5 of the present invention. The server includes: a receiving module 11 and a first allocation module 12, wherein,

The receiving module 11 is configured to receive the address request message sent by the first BRAS in the broadband remote access server BRAS cluster, the address pool management server includes the current idle address information of each BRAS in the BRAS cluster;

The first allocation module 12 is configured to send the idle address of the second BRAS in the BRAS cluster to the first BRAS according to the current idle address information of each BRAS in the BRAS cluster, so as to send the idle address of the second BRAS to the first BRAS The idle address is allocated to the terminal equipment connected to the first BRAS.

The address pool management server in this embodiment can be specifically used to execute the method in the method embodiment shown in FIG. 1 , and its implementation principle and technical effect are similar, and details are not repeated here.

FIG. 8 is a schematic structural diagram of the address pool management server provided by Embodiment 6 of the present invention. As shown in FIG. 8, on the basis of the server shown in FIG. 7 in this embodiment, the receiving module 11 is also used to receive each The address pool information of the BRASs respectively sent by the BRASs, the address pool information of the BRASs includes address lists in the address pools of the BRASs and free address information in the address pools of the BRASs.

The server also includes:

The storage module 13 is configured to bind the address pool information of the BRASs to the BRASs and store them in the address pool information database of the address pool management server.

The query module 14 is configured to query the address pool information database to determine whether there is an idle address in the address pool of the second BRAS.

The address pool management server of this embodiment can be specifically used to execute the method of the method embodiment shown in FIG. 2, and it can be specifically applied to the system structure diagram shown in FIG. 3 as the active address pool management server or the backup address pool management server, The implementation principles and technical effects are similar, and will not be repeated here.

FIG. 9 is a schematic structural diagram of a broadband remote access server provided in Embodiment 7 of the present invention. As shown in FIG. 9, the server includes:

The first receiving module 31 is configured to receive an address request message sent by the terminal device;

The determination module 32 is configured to send the address request message to an address pool management server if it is determined that there is no idle address in the BRAS according to the idle address information contained in the broadband remote access server BRAS;

The second receiving module 33 is configured to receive idle addresses of other BRASs sent by the address pool management server, the BRAS and the other BRASs all belong to the BRAS cluster;

The second allocating module 34 is configured to send the idle address of the other BRAS to the terminal device.

The server of this embodiment can be specifically used to execute the method of the method embodiment shown in Figure 6, and it can be specifically applied to any BRAS in the BRAS cluster in the system structure diagram shown in Figure 3 and Figure 5, and its realization principle and technical effect Similar and will not be repeated here. Wherein, the determination module 32 is further configured to determine that the BRAS has an idle address according to the idle address information contained in the BRAS; the second assignment module 34 is also configured to assign the idle address of the BRAS to the terminal device .

Fig. 10 is a schematic diagram of an address allocation system provided by Embodiment 8 of the present invention. As shown in Fig. 10, the system includes: a broadband remote access server BRAS cluster 21, and addresses outside the BRAS cluster 21 that communicate with each BRAS in the BRAS cluster 21 pool management server 22, wherein,

The address pool management server 22 adopts the address pool management server of the embodiment shown in FIG. The current idle address information of each BRAS; the current idle address information of each BRAS in the BRAS cluster, sending the idle address of the second BRAS in the BRAS cluster to the first BRAS, so as to send the idle address of the second BRAS to the first BRAS Addresses are assigned to terminal devices connected to the first BRAS.

The BRAS cluster 21 includes multiple broadband remote access servers BRAS in the embodiment shown in FIG. 9 .

The address allocation system of this embodiment can be specifically used to execute the method of the method embodiment shown in FIG. 1 , and its implementation principle and technical effect are similar, and details are not repeated here.

Fig. 11 is a schematic diagram of the address allocation system provided by Embodiment 9 of the present invention. As shown in Fig. 11, the system further includes: BRAS clusters 21 outside the BRAS cluster 21 and BRASs in the BRAS cluster 21 on the basis of the system shown in Fig. 10 The backup address pool management server 23 of communication, wherein

The address pool management server 22 adopts the address pool management server of the embodiment shown in FIG. 8 as the active address pool management server of the method embodiment shown in FIG. 2 ;

The standby address pool management server 23 adopts the address pool management server of the embodiment shown in FIG. 8 as the standby address pool management server of the method embodiment shown in FIG. The job of the pool management server.

The address allocation system of this embodiment can be specifically used to execute the method of the method embodiment shown in Figure 2. The system of this embodiment can adopt the system architecture shown in Figure 3 during specific implementation, and its implementation principle and technical effect are similar. I won't repeat them here.

Figure 12 is a schematic diagram of the address allocation system provided by Embodiment 10 of the present invention, as shown in Figure 12, the system includes: BRAS cluster 21, wherein, BRAS cluster 21 includes a plurality of broadband remote access servers BRAS of the embodiment shown in Figure 9 One BRAS in the BRAS cluster 21 adopts the address pool management server of the embodiment shown in FIG. 7 to execute the work of the address pool management server of the embodiment of the method shown in FIG. 1 .

The address allocation system of this embodiment can be specifically used to execute the method of the method embodiment shown in FIG. 1 , and its implementation principle and technical effect are similar, and details are not repeated here.

Figure 13 is a schematic diagram of the address allocation system provided by Embodiment 11 of the present invention. As shown in Figure 13, the system is based on the system shown in Figure 12, and one BRAS in the BRAS cluster 21 adopts the address of the embodiment shown in Figure 8 Pool management server, execute the work of the active BRAS of the embodiment of the method shown in Figure 4; Another BRAS in the BRAS cluster 21 adopts the address pool management server of the embodiment shown in Figure 8, executes the embodiment of the method shown in Figure 4 The standby BRAS works.

The address allocation system of this embodiment can be specifically used to execute the method of the method embodiment shown in Figure 4. The system of this embodiment can adopt the system architecture shown in Figure 5 during specific implementation, and its implementation principle and technical effect are similar. I won't repeat them here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (13)

1. an address distribution method, is characterized in that, comprising:

Address pool management server receives the address request that the BRAS in Broadband Remote Access Server BRAS cluster sends, and comprises the current idle address information of each BRAS in described BRAS cluster in described address pool management server;

According to the current idle address information of each BRAS in described BRAS cluster, the idle address of the 2nd BRAS in described BRAS cluster is sent to a described BRAS, the idle address of described the 2nd BRAS is distributed to the terminal equipment being connected with a described BRAS.

2. method according to claim 1, is characterized in that, the address request that described address pool management server receives the BRAS transmission in Broadband Remote Access Server BRAS cluster also comprises before:

Described address pool management server receives the address pool information of described each BRAS that in described BRAS cluster, each BRAS sends respectively, and the address pool information of described each BRAS comprises the idle address information in address list, the described each BRAS address pool in described each BRAS address pool;

After being bound with described each BRAS respectively, the address pool information of described each BRAS deposits the address pool information database of described address pool management server in.

3. method according to claim 2, it is characterized in that, the described idle address by the 2nd BRAS in described BRAS cluster sends to a described BRAS, before the idle address of described the 2nd BRAS being distributed to the terminal equipment being connected with a described BRAS, also comprises:

Described address pool management server is inquired about described address pool information database, determines in the address pool of described the 2nd BRAS and has idle address.

4. according to the method described in any one in claim 1～3, it is characterized in that, described address pool management server is one of each BRAS in described BRAS cluster, or is the server outside described BRAS cluster.

5. an address distribution method, is characterized in that, comprising:

The address request that the first Broadband Remote Access Server BRAS receiving terminal apparatus sends;

If determine that according to the idle address information comprising in a described BRAS a described BRAS does not exist idle address, described address request sends to the address pool management server of BRAS cluster; In described address pool management server, comprise the current idle address information of each BRAS in described BRAS cluster;

Receiver address pond management server sends the idle address of the 2nd BRAS, and a described BRAS and the 2nd BRAS all belong to described BRAS cluster;

The idle address of described the 2nd BRAS is sent to described terminal equipment.

6. method according to claim 5, is characterized in that, also comprises:

If determine there is idle address in a described BRAS, described terminal equipment distributed to in the idle address of a described BRAS.

7. an address pool management server, is characterized in that, comprising:

Receiver module, the address request sending for receiving a BRAS of Broadband Remote Access Server BRAS cluster, comprises the current idle address information of each BRAS in described BRAS cluster in described address pool management server;

The first distribution module, be used for according to the current idle address information of the each BRAS of described BRAS cluster, the idle address of the 2nd BRAS in described BRAS cluster is sent to a described BRAS, the idle address of described the 2nd BRAS is distributed to the terminal equipment being connected with a described BRAS.

8. server according to claim 7, it is characterized in that, described receiver module, also, for receiving the address pool information of described each BRAS that the each BRAS of described BRAS cluster sends respectively, the address pool information of described each BRAS comprises the idle address information in address list, the described each BRAS address pool in described each BRAS address pool;

Described server also comprises: memory module, and for depositing the address pool information database of described address pool management server after the address pool information of described each BRAS is bound with described each BRAS respectively in.

9. server according to claim 8, is characterized in that, described server also comprises:

Enquiry module, for inquiring about described address pool information database, determines in the address pool of described the 2nd BRAS whether have idle address.

10. a Broadband Remote Access Server, is characterized in that, comprising:

The first receiver module, the address request sending for receiving terminal apparatus;

Determination module, for the idle address information comprising according to described Broadband Remote Access Server BRAS, if determine there is not idle address in described BRAS, described address request sent to address pool management server; In described address pool management server, comprise the current idle address information of each BRAS in BRAS cluster;

The second receiver module, the idle address of other BRAS that send for receiver address pond management server, described BRAS and described other BRAS all belong to described BRAS cluster;

The second distribution module, for sending to described terminal equipment by the idle address of described other BRAS.

11. servers according to claim 10, is characterized in that, described determination module, and the also idle address information for comprising according to described BRAS, determines that described BRAS exists idle address;

Described the second distribution module, also for distributing to described terminal equipment by the idle address of described BRAS.

12. 1 kinds of address allocation systems, is characterized in that, comprising:

Broadband Remote Access Server BRAS cluster, described BRAS cluster comprises multiple BRAS as described in claim 10 or 11;

With the address pool management server that in described BRAS cluster, each BRAS communicates by letter, described address pool management server is the address pool management server described in any one in claim 7～9.

13. 1 kinds of address allocation systems, is characterized in that, comprising:

Broadband Remote Access Server BRAS cluster, described BRAS cluster comprises multiple BRAS as described in claim 10 or 11, a BRAS in described BRAS cluster adopts the address pool management server as described in any one in claim 7～9.