WO2016101437A1

WO2016101437A1 - Method and device for service cutover and wide-band access server

Info

Publication number: WO2016101437A1
Application number: PCT/CN2015/076000
Authority: WO
Inventors: 徐盛
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-25
Filing date: 2015-04-07
Publication date: 2016-06-30
Also published as: CN105790993B; CN105790993A

Abstract

A method and device for service cutover and a wide-band access server are provided in the present invention, which relates to the field of communications. The method includes: performing a cutover operation on the user in a first service router to transfer the service of the user to a second service router, and configuring the second service router to transmit the second route of the user to a superior core router of the first service router, wherein the bits of the second route is larger than that of a first route corresponding to the user and originally stored in the core router, and the core router delivers the flow of the user according to the longest match rule of a route. The scheme of the present invention can realize the correctness of the return flow of the cutover user without changing the user gateway route released by the original service router, and ensure that the return flow of the non-cutover user is not affected.

Description

Service cutover method, device and broadband access server

Technical field

The present invention relates to the field of communications, and in particular, to a service cutover method, apparatus, and broadband access server.

Background technique

The Broadband Access Server (BRAS) mainly performs two functions, one is the network bearer function; the other is the control implementation function: cooperate with the authentication system, the billing system, the customer management system and the service policy control system to implement user access authentication, Billing and management functions;

At present, the network equipment of major operators of China Telecom, China Unicom and China Mobile has been basically fixed, and the services carried out by various network equipments are not the same. In order to allow network equipment vendors to provide more cost-effective equipment, and to carry out more and more secure services, operators often require equipment to be provided by multiple vendors. If a certain site is used, the previous device is completely provided by one device manufacturer. Now the operator wants to join another device vendor, and at the same time, if you want to change the configuration of the previous device, only the newly added device can realize the division of the network service, and Ensure that the services of the cut-over users are not affected, and the original equipment is not affected. If the service is completely cut, that is, the device is replaced, as long as the new device can support the services of the original device. If only one part of the same service is to be cut, for example, if there are 2000 users on the existing device, then 1000 users are cut and connected to the new device, and the original device configuration is guaranteed to be unchanged. Realize the normal operation of new and old equipment at the same time.

Here, if the configuration of the original device is not changed, the authentication and authorization information of the existing user on the AAA server remains unchanged, that is, the IP address delivered to the user is also unchanged, since the existing device has already released the user. The gateway route of the address, so that even if the user cuts off the new device, the network side backhaul traffic can only be returned to the existing device.

Therefore, in order to ensure the accuracy of the backhaul user's backhaul traffic, the prior art needs to configure a new gateway route for the cutover user, which results in the scheme being not convenient enough.

Summary of the invention

The embodiment of the present invention provides a service cutover method, a device, and a broadband access server, so as to at least solve the related art, how to implement the cutover user backhaul traffic without changing the route of the user gateway issued by the original service router. The question of correctness.

To solve the above technical problem, an embodiment of the present invention provides a service cutover method, including:

Performing a cutover operation on the user on the first service router to transfer the user to the second service router;

Configuring the second service router to send the second route of the user to the core router connected to the first service router, where the number of bits of the second route is greater than that originally saved by the core router and corresponding to the user First route

The core router delivers the traffic of the user according to the longest matching principle of the route.

The first service router and the second service router are broadband remote access servers.

The performing the cutover operation on the user on the first service router includes:

Performing a configuration operation on the second service router, so that the second service router authenticates the user, and after the authentication succeeds, issues the IP address used by the user on the first service router to the user.

The second service router is configured to send the second route of the user to the core router that is connected to the first service router, including:

Determining whether the user has a gateway;

If yes, the second service router is configured to use the network segment of the user as the second route, and send the route to the core router.

No, the second service router is configured to generate a 32-bit route mask for the user, and send the route mask to the core router as the second route.

In addition, another embodiment of the present invention further provides a service switching device, including:

The cutover module is configured to perform a cutover operation on the user on the first service router, so that the service of the user is transferred to the second service router;

a configuration module, configured to send the second service router to send the second route of the user to the core router that is connected to the first service router, where the number of bits of the second route is greater than the original saved by the core router a first route to the user;

The cutover module includes:

The first configuration sub-module is configured to perform the configuration operation on the second service router, so that the second service router authenticates the user, and after the authentication succeeds, issues the user to the first service to the user. The IP address used on the router.

The configuration module includes:

Determining a sub-module, setting to determine whether the user has a gateway;

a second configuration sub-module, configured to: if the user has a gateway, configure the second service router to use the network segment route of the user as the second route, and send the route to the core router; otherwise, the configuration The second service router generates a 32-bit route mask for the user, and sends the route mask to the core router as the second route.

In addition, another embodiment of the present invention further provides a broadband access server, including:

a receiving module, configured to receive a user cut by the first service router;

a sending module, configured to send a second route to the core router, where the number of bits of the second route is greater than a first route that is originally saved by the core router and corresponding to the user;

The broadband access server further includes:

The authentication module is configured to authenticate the user when the user goes online, and after the authentication succeeds, issue the IP address used by the user on the first service router to the user.

The beneficial effects of the above technical solution of the present invention are as follows:

The technical solution provided by the embodiment of the present invention can cut all users or a part of users to the second service router without changing the route of the first service router to release the user gateway, and enable the core router to cut the user. The traffic is correctly sent underground to the second service router.

DRAWINGS

1 is a schematic diagram of steps of a service cutover method according to the present invention;

2 is a schematic diagram of a network structure of a service cutover method embodying the present invention;

3 is a detailed flow diagram of a service cutover method embodying the present invention;

4 is a schematic structural view of a service cutover device embodying the present invention;

5 is a schematic structural diagram of a broadband access server embodying the present invention;

FIG. 6 is a schematic diagram of execution logic of a broadband access server according to the present invention.

detailed description

The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in the following description.

As shown in FIG. 1 , an embodiment of the present invention provides a service cutover method, including:

Step 11: Perform a cutover operation on the user on the first service router, and transfer the service of the user to the second service router.

Step 12: The second service router is configured to send the second route of the user to the core router that is connected to the first service router, where the number of bits of the second route is greater than that originally saved by the core router. Describe the first route of the user;

It should be noted that the first route saved by the core router may be sent by the first service router. Before adding the second service router, the core router sends the traffic of the user to the first service router according to the first route. . After the user cuts off the second service router, the second service router sends a second route with a higher number of bits to the core router, and the core router saves the second route. When the core router delivers the traffic of the user, the second route with a higher number of bits is selected according to the longest matching principle of the route. Therefore, the traffic of the cutover user is sent to the second service router. At the same time, other users that are not cut off by the first service router will not be affected. The traffic of these users is still sent by the core router to the first service router as before.

It can be seen that the method in this embodiment can cut all users or a part of users to the second service router without changing the route of the first service router to release the user gateway, and enable the core router to cut the traffic of the user. Send it to the second service router correctly.

Specifically, the service router in this embodiment is specifically a broadband remote access server (BRAS). After the user moves to the second service router, the IP address of the cutover user needs to be re-issued. In the prior art, when the user IP address is changed, the configuration on the AAA server needs to be changed accordingly. Therefore, in order to avoid the modification of the AAA server, in the foregoing step 11, the second service router needs to be configured to perform the operation on the second service router to authenticate the cutover user, and after the authentication succeeds, the handover is performed to the cutover user. The IP address that the user originally used on the first service router.

In addition, as a feasible but non-essential preferred solution, for the convenience of implementation, if the cutting user has a gateway, the network segment of the cut user can be directly used as the second route, and if there is no network segment route, the user can be generated for the cutting user. A second route. That is, in performing step 12 above, it is specifically determined whether the user has a gateway; if yes, configuring the second service router to route the network segment of the user as the second route, and sending the signal to the core router No, the second service router is configured to generate a 32-bit route mask for the user, and send the route mask to the core router as the second route.

The method of this embodiment will be described in detail below in conjunction with an implementation manner.

In this implementation manner, the service server is specifically a BRAS (Broadband Remote Access Server), as shown in FIG. 2, assuming that a new BRAS device is introduced in the existing network, and the user 1 on the original BRAS is separated. For all services, the IP address of user 1 is 1.1.1.2. The process of cutting the user is as shown in Figure 3.

Converting User 1's configuration to a new device's configuration eliminates the need to configure User 1's gateway.

The downlink device of the user 1 service is allocated to the new BRAS. As shown in Figure 2, the downlink device is a switch, and the services between users are divided by VLAN (user 1 corresponds to VLAN 1 and user 2 corresponds to VLAN 2). In this step, the switch connects to the new BRAS. Configure VLAN1 on it.

User 1 dials normally, where User 1 cannot perceive any changes.

After User 1 goes online, the authentication message is delivered to the new BRAS.

The new BRAS authenticates User 1 through the AAA server and still issues the same IP address (1.1.1.2) to User 1.

The new BRAS generates a second route for User 1 according to a routing protocol (such as Open Shortest Path First Protocol (OSPF), Link State Routing Protocol (ISIS)), and advertises the second route of User 1 to the core router.

The core router CR locally stores the second route of the user 1; it is assumed that the core router currently simultaneously stores the first route 1.1.0.1/16 of the user B for the original BRAS and the newly added second route 1.1.1.2/32 (the first route 1.1) .0.1/16 is issued by the original BRAS to the core routing device before User 1 is cut.

User 2 on the original BRAS (assuming the user's DI address is 1.1.1.1) accesses the network. After the backhaul message reaches the core router, the core router will match the route entry to 1.1.0.1/16. One hop is the original BRAS, so the message can be correctly delivered to the original BRAS; when the user 1 accesses the network, when the backhaul message arrives at the core router, it will match the 1.1.1.2/32 when querying the route entry (ignoring 1.1.0.1/16), the next hop of the route is the new BRAS, so the message can be correctly delivered to the new BRAS; thus, the cutover of the user 1 is implemented, and the original BRAS does not normally receive the user. Return traffic.

In addition, an embodiment of the present invention further provides a service cutover device, as shown in FIG. 4, including:

The cutover module further includes:

The configuration sub-module is configured to perform the configuration operation on the second service router, so that the second service router authenticates the user, and after the authentication succeeds, the user is issued to the user on the first service router. The IP address used.

Obviously, the service cutover device of this embodiment can achieve the same technical effect corresponding to the service cutover method provided by the previous embodiment.

In addition, an embodiment of the present invention further provides a broadband access server, as shown in FIG. 5, including:

a sending module, configured to send a second route to the user to the core router, where the number of bits of the second route is greater than a first route that is originally saved by the core router and corresponding to the user; the first route may be It is the original first service router sent to the core router for the user.

Further, the broadband access server of this embodiment further includes:

As shown in FIG. 6, the broadband access server performs the following logic:

S1: After the user goes online, the AAA server completes the authentication after the user goes online, and specifies an IP address after the authentication succeeds.

S2. Determine whether the user has a gateway.

S3. If there is no gateway, when the user goes online, a second route is generated specifically for the user.

S4. If there is a gateway, the network segment route of the user is used as the second route.

S5. Announce the second route of the user to the core router, so that the core router saves.

S6, the end.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Industrial applicability

As described above, the service cutover method and apparatus and the broadband access server provided by the embodiments of the present invention have the following beneficial effects: all users or a part of the user service router can be distributed without changing the route of the first service router. The user cuts off the second service router and enables the core router to correctly send the traffic of the cutover user to the second service router.

Claims

A service cutover method, including:

Performing a cutover operation on the user on the first service router to transfer the user to the second service router;

Configuring the second service router to send the second route of the user to the core router connected to the first service router, where the number of bits of the second route is greater than that originally saved by the core router and corresponding to the user First route

The core router delivers the traffic of the user according to the longest matching principle of the route.
The method of claim 1 wherein said first service router and said second service router are both broadband remote access servers.
The method of claim 2, wherein

The cutover operation is performed on the users on the first service router, including:

Performing a configuration operation on the second service router, so that the second service router authenticates the user, and after the authentication succeeds, issues the IP address used by the user on the first service router to the user.
The method of claim 2, wherein

And the second service router is configured to send the second route of the user to the core router that is connected to the first service router, including:

Determining whether the user has a gateway;

If yes, the second service router is configured to use the network segment of the user as the second route, and send the route to the core router.

No, the second service router is configured to generate a 32-bit route mask for the user, and send the route mask to the core router as the second route.
A service cutover device comprising:

The cutover module is configured to perform a cutover operation on the user on the first service router, so that the service of the user is transferred to the second service router;

a configuration module, configured to send the second service router to send the second route of the user to the core router that is connected to the first service router, where the number of bits of the second route is greater than the original saved by the core router a first route to the user;

The core router delivers the traffic of the user according to the longest matching principle of the route.
The device according to claim 5, wherein

The first service router and the second service router are both broadband remote access servers.
The apparatus according to claim 6, wherein

The cutover module includes:

The first configuration sub-module is configured to perform the configuration operation on the second service router, so that the second service router authenticates the user, and after the authentication succeeds, issues the user to the first service to the user. The IP address used on the router.
The apparatus according to claim 6, wherein

The configuration module includes:

Determining a sub-module, setting to determine whether the user has a gateway;

a second configuration sub-module, configured to: if the user has a gateway, configure the second service router to use the network segment route of the user as the second route, and send the route to the core router; otherwise, the configuration The second service router generates a 32-bit route mask for the user, and sends the route mask to the core router as the second route.
A broadband access server, including:

a receiving module, configured to receive a user cut by the first service router;

a sending module, configured to send a second route to the core router, where the number of bits of the second route is greater than a first route that is originally saved by the core router and corresponding to the user;

The core router delivers the traffic of the user according to the longest matching principle of the route.
The broadband access server of claim 9, further comprising:

The authentication module is configured to authenticate the user when the user goes online, and after the authentication succeeds, issue the IP address used by the user on the first service router to the user.