CN105790993B - A service cutover method, device and broadband access server - Google Patents

Abstract

The invention provides a service cutover method, device and broadband access server, and relates to the communication field. The method includes: performing 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; configuring the second service router to send the The second route of the user, the number of digits of the second route is greater than the first route corresponding to the user originally stored by the core router; wherein, the core router issues the route according to the longest matching principle of the route the user traffic. The scheme of the present invention can realize the correctness of the backhaul flow of the cutover user without changing the user gateway route issued by the original service router, and at the same time ensure that the backhaul flow of the uncutover user is not affected.

Description

A service cutover method, device and broadband access server

technical field

The invention relates to the communication field, in particular to a service cutover method, device and broadband access server.

Background technique

The broadband access server (BRAS) mainly completes two functions, one is the network bearer function; the other is the control realization function: cooperate with the authentication system, billing system, customer management system and service policy control system to realize user access authentication, Billing and management functions;

At present, the layout of network equipment of major operators such as China Telecom, China Unicom, and China Mobile has been basically fixed, and the services carried out by each network equipment are also different. In order to allow network equipment vendors to provide equipment with more competitive prices and to develop more and more secure services, operators often require equipment to be provided by multiple manufacturers. If at a certain site, the previous equipment was completely provided by one equipment manufacturer, and now the operator wants to join another equipment manufacturer, but at the same time does not want to change the configuration of the previous equipment, only adding new equipment can realize partial switching of network services, and It is guaranteed that the services of the users who have been cut over will not be affected, and the original equipment will not be affected at the same time. If the business is completely cut over, that is, the equipment is replaced, as long as the new equipment can support the services of the original equipment. If only part of the same service needs to be cut over, for example, there were 2000 users on the existing equipment before, and now 1000 users are cut over to the new equipment, and it is guaranteed that the configuration of the existing equipment should not be changed as much as possible. 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 will remain unchanged, that is, the IP address issued to the user will also remain unchanged. The gateway route of the address, so that even if the user cuts over to a new device, the backhaul traffic on the network side can only return to the existing device.

Therefore, in order to ensure the accuracy of the cutover user's backhaul traffic, the existing technology needs to configure a new gateway route for the cutover user, which makes the implementation of the solution inconvenient.

Contents of the invention

The technical problem to be solved by the present invention is how to realize the correctness of cutover user return traffic without changing the user gateway route issued by the original service router.

In order to solve the above technical problems, an embodiment of the present invention provides a service cutover method, including:

performing a cutover operation on the user on the first service router, so that the user is transferred to the second service router;

Configure 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 digits of the second route is greater than the number of bits corresponding to the user previously stored by the core router first route;

Wherein, the core router delivers the traffic of the user according to the longest matching principle of routes.

Wherein, both the first service router and the second service router are broadband remote access servers.

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

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

Wherein, configuring the second service router to send the second route of the user to the core router connected to the first service router includes:

determining whether the user has a gateway;

If yes, configure the second service router to use the network segment route of the user as the second route and send it to the core router;

If not, configure the second service router to generate a 32-bit routing mask for the user, and send the routing mask to the core router as the second route.

In addition, another embodiment of the present invention also provides a service cutover device, including:

A cutover module, 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 configure the second service router to send the second route of the user to the core router connected to the first service router, the number of bits of the second route is greater than the corresponding the first route for the user;

Wherein, the core router delivers the traffic of the user according to the longest matching principle of routes.

Wherein, both the first service router and the second service router are broadband remote access servers.

Wherein, the cutover module includes:

The first configuration submodule is configured to configure the second service router, so that the second service router authenticates the user, and after the authentication is successful, issues the first service of the user to the user The IP address used on the router.

Wherein, the configuration module includes:

A determination submodule is used to determine whether the user has a gateway;

The second configuration submodule is configured to configure the second service router to use the user's network segment route as the second route if the user has a gateway, and send it to the core router; otherwise, configure the The second service router generates a 32-bit routing mask for the user, and sends the routing mask as the second route to the core router.

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

A receiving module, configured to receive users cut over by the first service router;

A sending module, configured to send a second route for the user to the core router, where the number of digits of the second route is greater than the first route corresponding to the user originally stored by the core router;

Wherein, the core router delivers the traffic of the user according to the longest matching principle of routes.

Wherein, the broadband access server also includes:

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

The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

The solution of the present invention can cut over all or part of its users to the second service router without changing the user gateway route published by the first service router, and enable the core router to correctly deliver the traffic of the cutover users to the second service router. to the second service router.

Description of drawings

Fig. 1 is a schematic diagram of the steps of the service cutover method of the present invention;

Fig. 2 is a schematic diagram of the network structure implementing the service cutover method of the present invention;

Fig. 3 is a detailed flow schematic diagram implementing the service cutover method of the present invention;

FIG. 4 is a schematic structural diagram of a service cutover device implementing the present invention;

FIG. 5 is a schematic structural diagram of a broadband access server implementing the present invention;

Fig. 6 is a schematic diagram of execution logic of the broadband access server of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

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

Step 11, performing 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;

Step 12, configure the second service router to send the second route of the user to the core router connected to the first service router, the number of bits of the second route is greater than the number of digits corresponding to the previously stored by the core router the first route of the user;

It should be noted that the first route originally saved by the core router may be sent by the first service router. Before adding the second service router, the core router sends the user's traffic to the first service router according to the first route . After the user is cut over to the second service router, the second service router sends a second route with a higher number of digits to the core router, and the core router stores the second route. When the core router delivers the traffic of the user, it will select the second route with a higher number of bits according to the longest matching principle of the route, so it will send the traffic of the cutover user to the second service router. At the same time, other users not cut over by the first service router will not be affected, and the traffic of these users is still sent to the first service router by the core router as before.

It can be seen that the method of this embodiment can cut over all or a part of its users to the second service router without changing the user gateway route published by the first service router, and enable the core router to transfer the traffic of the cutover users to the second service router. Correctly send to the second service router.

Specifically, the service router in this embodiment is specifically the broadband remote access server BRAS, and after the user is transferred to the second service router, an IP address needs to be issued to the cutover user again. In the prior art, when changing the IP address of the user, the configuration on the AAA server also needs to be correspondingly changed. Therefore, in order to avoid making changes to the AAA server, it is necessary to configure the second service router in the above step 11, so that the second service router can authenticate the cutover user, and after successful authentication, issue a The IP address originally used by the user on the first service router.

In addition, as a feasible but not necessary preferred solution, for the convenience of implementation, if the cutting user has a gateway, the network segment route of the cutting user can be directly used as the second route; if there is no network segment route, it can be generated for the cutting user a second route. That is, in performing the above step 12, specifically determine whether the user has a gateway; if yes, then configure the second service router to use the user's network segment route as the second route and send it to the core router ; No, configure the second service router to generate a 32-bit routing mask for the user, and send the routing mask to the core router as the second route.

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

In this implementation mode, the service server is specifically a BRAS (Broadband Remote Access Server, broadband access server), as shown in Figure 2, assuming that a new BRAS device is introduced in the existing network, and the user 1 on the original BRAS is separated. All services (the IP address of user 1 is: 1.1.1.2), the specific process of handing over the user is shown in Figure 3, including:

Convert user 1's configuration to new device configuration without configuring user 1's gateway.

Allocate the downlink device of user 1's service to the new BRAS. As shown in Figure 2, assuming that the downlink device is a switch, and the services between users are divided by VLAN (user 1 corresponds to VLAN1, user 2 corresponds to VLAN2), in this step, the switch is connected to the port of the new BRAS on the switch Configure VLAN1 on it.

User 1 dials normally, and user 1 cannot perceive any changes here.

After user 1 goes online, the authentication packet 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 as before.

The new BRAS generates a second route for user 1 according to routing protocols (such as OSPF, link state routing protocol ISIS), and notifies the second route of user 1 to the core router.

The core router CR stores the second route of user 1 locally; assuming that the core router currently stores the first route 1.1.0.1/16 of user 1 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 cutover).

When user 2 on the original BRAS (assuming the user DI address is 1.1.1.1) accesses the network, after the return packet reaches the core router, the core router will match 1.1.0.1/16 when querying the routing entry. The first hop is the original BRAS, so the packet can be correctly delivered to the original BRAS; when user 1 accesses the network, when the return packet reaches the core router, it will match 1.1.1.2/32 when querying the routing entry (ignored 1.1.0.1/16), the next hop of this route is the new BRAS, so the message can be delivered to the new BRAS correctly; in this way, the cutover of user 1 is realized without affecting the normal reception of user 1 by the original BRAS return traffic.

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

A cutover module, 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 configure the second service router to send the second route of the user to the core router connected to the first service router, the number of bits of the second route is greater than the corresponding the first route for the user;

Wherein, the core router delivers the traffic of the user according to the longest matching principle of routes.

It can be seen that the method of this embodiment can cut over all or a part of its users to the second service router without changing the user gateway route published by the first service router, and enable the core router to transfer the traffic of the cutover users to the second service router. Correctly send to the second service router.

Wherein, both the first service router and the second service router are broadband remote access servers.

The cutover module further includes:

The configuration sub-module is configured to configure the second service router, so that the second service router authenticates the user, and after the authentication is successful, releases the user's information on the first service router to the user. The IP address used.

Apparently, the service cutover device in this embodiment corresponds to the service cutover method provided in the previous embodiment, and both can achieve the same technical effect.

In addition, the embodiment of the present invention also provides a broadband access server, as shown in Figure 5, including:

A receiving module, configured to receive users cut over by the first service router;

A sending module, configured to send a second route for the user to the core router, where the number of digits of the second route is greater than the first route corresponding to the user originally stored by the core router; the first route may It was originally sent by the first service router to the core router for the user.

Wherein, the core router delivers the traffic of the user according to the longest matching principle of routes.

Further, the broadband access server in this embodiment also includes "

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

As shown in Figure 6, the execution logic of the broadband access server is as follows:

S1. Complete the authentication after the user goes online through the AAA server, and designate an IP address after the authentication is successful.

S2. Determine whether the user has a gateway.

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

S4. If there is a gateway, use the user's network segment route as the second route.

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

S6, end.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A service cutover method, characterized in that, comprising: performing a cutover operation on the user on the first service router, so that the user is transferred to the second service router; Configure 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 digits of the second route is greater than the number of bits corresponding to the user previously stored by the core router first route; Wherein, the core router delivers the traffic of the user according to the longest matching principle of the route; The user on the first service router performs the cutover operation, including: Perform a configuration operation on the second service router, so that the second service router authenticates the user, and after the authentication is successful, issues the IP address used by the user on the first service router to the user. 2. The method according to claim 1, wherein both the first service router and the second service router are broadband remote access servers. 3. The method of claim 2, wherein, Configuring the second service router to send the second route of the user to the core router connected to the first service router includes: determining whether the user has a gateway; If yes, configure the second service router to use the network segment route of the user as the second route and send it to the core router; If not, configure the second service router to generate a 32-bit routing mask for the user, and send the routing mask to the core router as the second route. 4. A service cutover device, characterized in that it comprises: A cutover module, 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 configure the second service router to send the second route of the user to the core router connected to the first service router, the number of bits of the second route is greater than the corresponding the first route for the user; Wherein, the core router delivers the traffic of the user according to the longest matching principle of the route; The cutover module includes: The first configuration submodule is configured to configure the second service router, so that the second service router authenticates the user, and after the authentication is successful, issues the first service of the user to the user The IP address used on the router. 5. The device according to claim 4, characterized in that, Both the first service router and the second service router are broadband remote access servers. 6. The device according to claim 5, characterized in that, The configuration module includes: A determination submodule is used to determine whether the user has a gateway; The second configuration submodule is configured to configure the second service router to use the user's network segment route as the second route if the user has a gateway, and send it to the core router; otherwise, configure the The second service router generates a 32-bit routing mask for the user, and sends the routing mask as the second route to the core router. 7. A broadband access server, characterized in that, comprising: A receiving module, configured to receive users cut over by the first service router; A sending module, configured to send a second route for the user to the core router, where the number of digits of the second route is greater than the first route corresponding to the user originally stored by the core router; Wherein, the core router delivers the traffic of the user according to the longest matching principle of the route; The broadband access server also includes: The authentication module is configured to authenticate the user when the user goes online, and issue the IP address used by the user on the first service router to the user after the authentication is successful.