CN107707470B

CN107707470B - OSPF area number configuration method and equipment

Info

Publication number: CN107707470B
Application number: CN201610654017.8A
Authority: CN
Inventors: 魏小强
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-08-09
Filing date: 2016-08-09
Publication date: 2021-03-16
Anticipated expiration: 2036-08-09
Also published as: CN107707470A; WO2018028499A1

Abstract

The invention discloses an OSPF area number configuration method and equipment, wherein the method comprises the following steps: the first network element equipment is used for accessing second network element equipment to a network through the first network element equipment, the first network element equipment is equipment which is accessed to the network, the second network element equipment is equipment which is newly accessed to the network, and the first network element equipment is connected with the second network element equipment through a point-to-point link; the method comprises the following steps: receiving a first message sent by second network element equipment; sending a response message to a second network element device according to the first message, wherein the response message comprises: and the OSPF area number is connected between the first network element equipment and the second network element equipment. The invention expands the negotiation option of IPCP, can remotely complete OSPF area number configuration without on-site configuration of equipment, saves the route time and improves the efficiency.

Description

OSPF area number configuration method and equipment

Technical Field

The invention relates to the technical field of Internet, in particular to an OSPF area number configuration method and equipment.

Background

DCN (Data Communications Network) is a Data Communications Network defined in g.7712 by ITU-T (International telecommunications Union-telecommunications Sector), and includes both MCN (Management Communications Network) and SCN (Signaling Communications Network). The former is a communication network responsible for managing the plane, and the latter is a network responsible for signaling communications. Meanwhile, g.7712 also mentions that the link layer of the DCN supports communication modes such as ethernet or point-to-point link (point-to-point protocol); network layer support: pure OSI (Open System interconnection, an internet communication model) domain networking, pure IP domain networking, and hybrid OSI + IP domain networking. Since TCP/IP (Transmission Control Protocol/Internet Protocol ) has become the actual implementation standard of communication networks, the DCN network model we discuss here is: the link layer is a point-to-point link and the network layer is an IP-based three-layer forwarding network. It should be noted that, unless otherwise specified, DCN refers to MCN.

PPP (point-to-point protocol) is a logical link layer protocol family of point-to-point links. In RFC1661, PPP is mentioned to have mainly three functions:

1. a method for encapsulating multi-protocol messages.

2. Link Control Protocol (LCP), which includes establishment, configuration, and testing of data links.

3. The Network Control protocol family (NCPs), whose main function is to create and configure different Network layer Protocols.

RFC1332 defines IPCP (IP Control protocol), which is a major protocol for NCPs. It is responsible for configuring, enabling, and disabling the IP protocol model at both ends of the point-to-point link. It is almost identical to LCP except for the following protocol fields, code field ranges, etc.

Data link layer protocol field: 0x8021(0x represents 16 systems);

code field: only the use codes from 1 to 7(Configure-Request, Configure-Ack, Configure-Nak, Configure-Regect, Terminate-Request, Terminate-Ack and Code-Reject) are recognized. The other Code is treated as an unrecognizable Code and should generate a Code-retrieve.

As mentioned above, when the link layer PPP negotiation is completed, the creation and configuration of the network layer protocol is triggered. For example, an IP interface is created, an IP address obtained from PPP dialing is configured to the IP interface, a routing protocol on the interface is initiated to run, and so on.

After the network layer is configured, the IP packet forwarding can be generally executed, the forwarding of the IP packet depends on inquiring an IP forwarding table to obtain a message forwarding method, and finally, a forwarding process is executed. The IP forwarding table is a routing table entry for an IP packet to reach a destination, and it is generally learned by a routing protocol, and the learning and calculation results are injected into the forwarding table. Common routing protocols, such as: RIP (Routing Information Protocol), OSPF (Open Shortest Path First), IS-IS (intermediary System-to-intermediary System), and the like.

OSPF is an interior gateway protocol based on a link-state algorithm. Currently one of the most widely used routing protocols. During operation, the OSPF area numbers of two network ports are required to be equal, OSPF link state database synchronization can be carried out, and then SFP algorithm is executed to calculate IP route.

Before OSPF normally runs, a professional is generally required to configure the OSPF, for example, an OSPF interface area number and the like, and most of the information configuration needs to be implemented in an equipment opening field. If the equipment is in remote mountainous areas with inconvenient traffic or places such as islands which are difficult to reach, the field configuration is difficult. Especially, when the configuration parameters are abnormal, the recovery is not easy to modify. On-site configuration and post-maintenance have to consume a large amount of time on the road, so that the operation efficiency is greatly reduced.

Disclosure of Invention

The invention mainly aims to provide an OSPF area number configuration method and equipment, aiming at realizing the remote configuration of the OSPF area number and improving the operation efficiency.

In order to achieve the above object, the OSPF area number configuration method provided by the present invention comprises: the network access control system comprises a first network element device, a second network element device, a first network element device and a second network element device, wherein the first network element device is a device which is accessed into a network, the second network element device is a device which is newly accessed into the network, and the first network element device and the second network element device are connected through a point-to-point link; the OSPF area number configuration method comprises the following steps:

receiving a first message sent by the second network element equipment;

sending a response message to a second network element device according to the first message, wherein the response message comprises: and the OSPF area number is connected between the first network element equipment and the second network element equipment.

Preferably, after the sending a response message to the second network element device according to the first packet, the method includes:

judging whether the OSPF area number connected between the first network element equipment and the second network element equipment is modified;

if the OSPF area number of the first network element equipment and the second network element equipment is modified; receiving a second message sent by the second network element device, where the second message includes: an expected value for the OSPF area number;

comparing the expected value of the OSPF area number with the OSPF area number of the first network element equipment and the second network element equipment after modification according to the second message; if the first network element equipment and the second network element equipment are the same, sending a confirmation message to the second network element equipment; if the two network elements are different, sending a rejection message to the second network element device, where the rejection message includes: and after modification, the OSPF area number of the first network element device connected with the second network element device.

judging whether the second network element equipment is powered off or not;

if the second network element equipment is powered on again after power failure; receiving a third message sent by the second network element device, where the third message includes: an expected value for the OSPF area number;

comparing the expected value of the OSPF area number with the OSPF area number of the first network element equipment and the second network element equipment before power-off according to the third message; if the first network element equipment and the second network element equipment are the same, sending a confirmation message to the second network element equipment; if the two network elements are different, sending a rejection message to the second network element device, where the rejection message includes: and the OSPF area number is connected between the first network element equipment and the second network element equipment before power failure.

In order to achieve the above object, the present invention further provides an OSPF area number configuration method, configured to access a second network element device to a network through a first network element device, where the first network element device is a device that has already accessed the network, the second network element device is a device that newly accesses the network, and the first network element device and the second network element device are connected through a point-to-point link; the OSPF area number configuration method comprises the following steps:

sending a first message to the first network element equipment;

receiving a response message fed back by the first network element device according to the first packet, where the response message includes: the OSPF area number is connected between the first network element equipment and the second network element equipment;

setting the OSPF area number as the OSPF port area number.

Preferably, after the setting the OSPF area number as the area number of the OSPF port, the method further comprises:

if the OSPF area number of the first network element equipment and the second network element equipment is modified; sending a second message to the first network element device, where the second message includes: an expected value for the OSPF area number;

receiving a confirmation message or a rejection message fed back by the first network element equipment according to the second message;

setting the modified OSPF area number as the area number of the OSPF port.

judging whether the second network element equipment is powered off or not;

if the second network element equipment is powered on again after power failure; sending a third packet to the first network element device, where the third packet includes: an expected value for the OSPF area number;

receiving a confirmation message or a rejection message fed back by the first network element device according to the third message;

and setting the OSPF area number of the connection between the first network element equipment and the second network element equipment before power failure as the area number of the OSPF port.

The invention also provides OSPF area number configuration equipment, which comprises first network element equipment, wherein the first network element equipment is equipment which is accessed to the network, second network element equipment is equipment which is newly accessed to the network, and the first network element equipment is connected with the second network element equipment through a point-to-point link; wherein the first network element device comprises a response module;

the response module is configured to receive a first packet sent by the second network element device, and send a response message to the second network element device according to the first packet, where the response message includes: and the OSPF area number is connected between the first network element equipment and the second network element equipment.

Preferably, the first network element device further includes a comparing module, a confirming module and a rejecting module; the OSPF area number configuration equipment also comprises a judgment module;

the determining module is configured to determine whether an OSPF area number connected between the first network element device and the second network element device is modified;

the comparing module is configured to receive a second packet sent by the second device when the OSPF area number connected to the first network element device and the second network element device is modified, where the second packet includes: an expected value for the OSPF area number; comparing the expected value of the OSPF area number with the OSPF area number of the first network element equipment and the second network element equipment after modification according to the second message;

the confirmation module is configured to send a confirmation message to the second network element device when the expected value of the OSPF area number is the same as the OSPF area number of the modified connection between the first network element device and the second network element device;

the rejecting module is configured to send a rejecting message to the second network element device when the expected value of the OSPF area number is different from the OSPF area number of the modified connection between the first network element device and the second network element device, where the rejecting message includes: and after modification, the OSPF area number of the first network element device connected with the second network element device.

Preferably, the determining module is further configured to determine whether the second network element device is powered off;

the comparing module is further configured to receive a third message sent by the second network element device when the second network element device is powered on again after being powered off, where the third message includes: an expected value for the OSPF area number; comparing whether the expected value of the OSPF area number is the same as the OSPF area number connected between the first network element equipment and the second network element equipment before power-off according to the third message;

the confirming module is further configured to send a confirmation message to the second network element device when the expected value of the OSPF area number is the same as the OSPF area number of the connection between the first network element device and the second network element device before power failure;

the rejecting module is further configured to send a rejecting message to the second network element device when the expected value of the OSPF area number is different from the OSPF area number of the modified connection between the first network element device and the second network element device, where the rejecting message includes: and the OSPF area number is connected between the first network element equipment and the second network element equipment before power failure.

The invention also provides OSPF area number configuration equipment, which comprises second network element equipment, wherein the first network element equipment is equipment which is accessed to the network, the second network element equipment is equipment which is newly accessed to the network, and the first network element equipment is connected with the second network element equipment through a point-to-point link; wherein the second network element device includes: a request module and a setting module;

the request module is used for sending a first message to the first network element equipment;

the setting module is configured to receive a response message fed back by the first network element device according to the first packet, where the response message includes: the OSPF area number is connected between the first network element equipment and the second network element equipment; setting the OSPF area number as the OSPF port area number.

Preferably, the OSPF area number configuration device further comprises a judging module;

the request module is further configured to send a second packet to the first network element device when the OSPF area number connected between the first network element device and the second network element device is modified; the second packet includes: an expected value for the OSPF area number;

the setting module is further configured to receive an acknowledgment message or a rejection message fed back by the first network element device according to the second packet, and set the modified OSPF area number as the area number of the OSPF port.

the request module is further configured to send a third packet to the first network element device when the second network element device is powered on again after being powered off, where the third packet includes: an expected value for the OSPF area number;

the setting module is further configured to receive an acknowledgment message or a rejection message fed back by the first network element device according to the third packet, and set the OSPF area number where the first network element device and the second network element device are connected before power failure as the area number of the OSPF port.

According to the scheme of the invention, when a second network element device accesses a network through a first network element device which has accessed the network, the second network element device sends a first message to the first network element device after the first network element device and the second network element device establish point-to-point link connection; the first network element equipment sends a response message carrying an OSPF area number to second network element equipment according to the first message, wherein the OSPF area number is an OSPF port area number connected with the second network element equipment by the first network element equipment; the second network element equipment sets the OSPF area number as the area number of the OSPF port establishing a link connection relation with the first network element equipment; the network manager can remotely manage the first network element equipment and the second network element equipment to send or receive messages, and complete the remote configuration of the OSPF area number, and does not need an operator to carry out the OSPF area number configuration on the site of the newly accessed second network element equipment, so that a large amount of time consumed on the route is saved, and the operation efficiency is greatly improved.

Drawings

FIG. 1 is a flowchart illustrating a first embodiment of a method for configuring an OSPF area identifier according to the present invention;

FIG. 2 is a diagram illustrating a scenario applicable to the first embodiment;

fig. 3 is a schematic flowchart of a refinement process of an applicable scenario in the first embodiment;

FIG. 4 is a flowchart illustrating a second embodiment of the OSPF area ID configuration method of the present invention;

FIG. 5 is a diagram illustrating an applicable scenario of the second embodiment;

fig. 6 is a schematic diagram of a detailed flow of an applicable scenario of the second embodiment;

FIG. 7 is a flowchart illustrating a third embodiment of the OSPF area ID configuration method of the present invention;

FIG. 8 is a diagram illustrating an applicable scenario of the third embodiment;

fig. 9 is a schematic flowchart of a refinement of an applicable scenario in the third embodiment;

FIG. 10 is a flowchart illustrating another OSPF area ID configuration method according to a first embodiment of the present invention;

FIG. 11 is a flowchart illustrating another second embodiment of the OSPF area ID configuration method of the present invention;

FIG. 12 is a flowchart illustrating another OSPF area ID configuration method according to a third embodiment of the present invention;

FIG. 13 is a functional block diagram of an OSPF area ID configuration apparatus according to an embodiment of the present invention;

FIG. 14 is a functional block diagram of an OSPF area ID configuration apparatus according to another embodiment of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides an OSPF area number configuration method, in an embodiment, referring to fig. 1 and fig. 2, the method is used for accessing a second network element device to a network through a first network element device, the first network element device is a device already accessed to the network, the second network element device is a device newly accessed to the network, and the first network element device and the second network element device are connected through a point-to-point link; providing a configuration method of the OSPF area number from a first network element equipment side, wherein the method comprises the following steps:

step 20A, receiving a first message sent by a second network element device;

step 30A, sending a response message to a second network element device according to the first packet, where the response message includes: and the OSPF area number is connected between the first network element equipment and the second network element equipment.

And the second network element equipment sets the OSPF area number as the area number of the OSPF port.

It should be noted that the point-to-point link in this document is a broad concept of a PPP link, and may be an ethernet link running PPP, a GCC (General Control Channel), a DCC (Data Communication Channel), or the like; including physically real point-to-point links, as well as emulated or logical point-to-point links. Wherein the physical point-to-point link is, for example, a GCC channel or a DCC channel running PPP, etc.; the analog point-to-point link is, for example, a link for operating PPP (PPP over Ethernet, PPPoE for short) over Ethernet.

RFC1332 mentions that there may be three negotiation options when IPCP negotiates network layer parameters: IP address set, IP compression protocol, and IP address. And RFC1332 defines detailed negotiation rules of an IP address set, an IP compression protocol and an IP address; the OSPF area number protocol option follows the negotiation rules in RFC1332 above for IP address sets, IP compression protocol, and IP addresses. And adding an OSPF area number protocol option on the basis of the three negotiation options.

When PPP control IPCP negotiation is carried out between two devices connected by a point-to-point link, the negotiation option of the IPCP is expanded, an OSPF area number negotiation option is added in the negotiation option when the IPCP negotiates the parameters of a network layer, and the OSPF area number negotiation option is used for negotiation and configuration of the OSPF area number; a user (understood as the first network element device in this embodiment) in the OSPF area number protocol option may carry OSPF area number information; the configuration request sender may also be allowed to declare an expected value of the OSPF area number, which may be understood as that the expected value information of the OSPF area number is carried in the first message when the second network element device sends the first message; the second network element device may be further allowed to request the first network element device to provide OSPF area number information.

If the OSPF area number needs to be negotiated, the second network element device does not provide the OSPF area number option in the configuration first message, then the configuration option must be added to the response message fed back by the first network element device, the provided OSPF area number must be accepted, or the requirement of the second network element device for the OSPF area number is displayed. By default, the OSPF area number may not be specified.

In an embodiment of the present invention, the first message is a Configure-Request message, and all OSPF area number options in configuration options of the Configure-Request message are configured to be 0, it is considered that the OSPF area number options are not provided in the first message, and the configuration options must be added to an acknowledgement message fed back by the first network element device;

Configure-Nak, which is two command formats of the ML-PPP (Multilink-PPP) negotiation, the PPP functions strongly but has a limitation in network deployment that only one link is processed at a time, while ML-PPP is not limited by the limitation, which is a new Internet Engineering Task Force (IETF) standard for B-channel aggregation. Using the ML-PPP protocol, multiple PPP links may be bundled, increasing the available bandwidth for inter-device transmissions.

The following is the OSPF area number configuration option format. These fields are sent in left to right order.

Type

4

Length

6

OSPF Area Id

The OSPF Area Id contains four bytes that characterize the OSPF Area number. In the Request to send the Configure-Request message, the OSPF Area Id is used to Request the OSPF Area number. If all four bytes are set to 0, this indicates that the opposite end is requested to provide the OSPF area number.

Default value (Default)

0

Corresponding to the foregoing OSPF area code configuring method embodiment, referring to fig. 2, from a second network element device side, the present invention further provides an OSPF area code configuring method, where the method is used to access a second network element device to a network through a first network element device, the first network element device is a device already accessed to the network, the second network element device is a device newly accessed to the network, and the first network element device and the second network element device are connected through a point-to-point link; the OSPF area number configuration method comprises the following steps:

step 10A, sending a first message to the first network element equipment;

step 40A, receiving a response message fed back by the first network element device according to the first packet, where the response message includes: the OSPF area number is connected between the first network element equipment and the second network element equipment;

step 50A, setting the OSPF area number as the area number of the OSPF port.

The OSPF area number configuration method of the first embodiment is described in detail by an example as follows:

DCN network capacity expansion, allocating OSPF area number to OSPF interface of new network access equipment, after network management normally manages network element A, adding port B.2 of new network element B into existing network through port A.1 of network element A; the whole OSPF area number assignment process, see fig. 3 and fig. 4, mainly includes the following steps:

step 101A: the new network element B is powered on, the port B.2 starts PPP, and the LCP and the normally running equipment (the network element A) successfully negotiate;

step 102A: the port b.2 of the new network element B starts to initiate a Configure-Request message Request of IPCP, with the following option fields filled:

Type：4

Length：6

OSPF Area Id:0

here, the OSPF area number fills in a default value of 0, and requests an opposite terminal to send the OSPF area number;

step 103A: port a.1 of network element a, using the configuration-Nak message reply of the IPCP, the option fields are filled as follows:

Type：4

Length：6

OSPF Area Id:1.0.0.0

the above field indicates that the port b.2 of the neighbor device network element B is assigned with an OSPF interface area number of 1.0.0.0;

step 104A: port b.2 of new device network element B uses 1.0.0.0 as the area number of the OSPF interface.

The network element A and the network element B both comprise a plurality of ports, and if the newly added network element B is in a remote mountain area with inconvenient traffic, the technical scheme can be understood that a professional can complete the configuration of the port B.2 of the network element B only at a network manager without going to the place where the network element B is located; in the same manner, for example, if port b.1 of network element B joins the existing network through port c.1 of network element C, the OSPF Area Id of port b.1 of network element B may be configured to be equal to the OSPF Area Id of port c.1 of network element C: 2.0.0.0, the port b.1 of the new device network element B uses 2.0.0.0 as the area number of the OSPF interface, and the configuration of other ports of the network element B can be completed remotely.

When the network expands in large scale, the new network access equipment may be distributed in different places, each new network access equipment may have multiple ports, each port needs to be configured by means of the port of the network access equipment, and an operator can remotely complete the OSPF interface configuration operation of all the new network access equipment through the scheme without running between the places where the new network access equipment is located, so that a large amount of time is saved, and the operation efficiency is greatly improved.

As a second preferred embodiment of the above-mentioned scheme

Referring to fig. 5, on the basis of the first embodiment, after the second network element apparatus sets the OSPF area number as the area number of the OSPF port, the method includes:

step 10B, determining whether the OSPF area number connected between the first network element device and the second network element device is modified;

step 30B, if the OSPF area number of the connection between the first network element device and the second network element device is modified; receiving a second message sent by the second network element device, where the second message includes: an expected value for the OSPF area number;

it can be understood that if the OSPF area number of the connection between the first network element device and the second network element device is not modified, the second packet does not need to be sent. In an embodiment of the present invention, the second message is a Configure-Request message, where an OSPF area number option in configuration options of the Configure-Request message is configured as an expected value of an OSPF area number, and the expected value is defaulted to the OSPF area number of the connection between the first network element device and the second network element device before being modified;

step 40B, comparing the expected value of the OSPF area number with the modified OSPF area number of the connection between the first network element device and the second network element device according to the second message; if the first network element equipment and the second network element equipment are the same, sending a confirmation message to the second network element equipment; if the two network elements are different, sending a rejection message to the second network element device, where the rejection message includes: after modification, the OSPF area number of the connection between the first network element device and the second network element device;

in an embodiment of the present invention, the acknowledgment message is a Configure-Ack message, the Reject message is a Configure-Reject message, and if the modified OSPF area number is the same as that before the modification, the Configure-Ack message feeds back an acknowledgment; if the modified OSPF area number is different from that before the modification, the modified OSPF area number is added to the configuration options in the Configure-Reject message.

And the second network element equipment sets the modified OSPF area number as the area number of the OSPF port.

Corresponding to the above embodiment of the OSPF area number configuration method, referring to fig. 6, after the setting of the OSPF area number as the area number of the OSPF port includes:

step 20B, if the OSPF area number of the connection between the first network element device and the second network element device is modified; sending a second message to the first network element device, where the second message includes: an expected value for the OSPF area number;

step 50B, receiving a confirmation message or a rejection message fed back by the first network element device according to the second message; setting the modified OSPF area number as the area number of the OSPF port.

The OSPF area number configuration method of the second embodiment is described in detail by an example below:

the application scenario is applicable to modifying the OSPF interface area number, and as shown in fig. 7, after the network administrator normally manages the network element a and the network element B, the network administrator changes the OSPF interface area number between the network element a and the network element B in the network administration center. Referring to fig. 8, the method mainly includes the following steps:

step 101B: the network element A uses the port A.1 to communicate with the network element B through the B.2 of the network element B, and the OSPF area number is 1.0.0.0;

step 102B: the network management modifies the OSPF area number of the A.1 interface of the network element A to be 2.0.0.0;

step 103B: modifying the port A.1 management state of the network element A to be down on the network manager, and then updating the management state to be up again;

step 104B: triggering PPP of the port A.1 and the port B.2 to reinitiate negotiation, and entering negotiation of NCPs after LCP negotiation is successful;

step 105B: the IPCP of port b.2 starts to initiate a Configure-Request message Request, and the option fields are filled as follows:

Type：4

Length：6

OSPF Area Id:1.0.0.0；

here port b.2 declares the expected value of the OSPF area number as: 1.0.0.0;

step 106B: port a.1 rejects area number 1.0.0.0 using the Configure-Reject message and provides a new area number 2.0.0.0, with the option fields filled in as follows:

Type：4

Length：6

OSPF Area Id:2.0.0.0

step 107B: b.2 of network element B uses 2.0.0.0 as the area number of the OSPF interface.

When the configuration parameters are abnormal and need to be modified and recovered, a professional can remotely modify the OSPF interface area number, and the process is as above and is not described again; there is no need to flush between the location of network element a and the location of network element B.

Preferred embodiment III as the above

Referring to fig. 9, on the basis of the first embodiment, after the second network element apparatus sets the OSPF area number as the area number of the OSPF port, the method includes:

step 10C, judging whether the second network element equipment is powered off;

step 30C, if the second network element equipment is powered on again after power off; receiving a third message sent by the second network element device, where the third message includes: an expected value for the OSPF area number;

step 40C, comparing whether the expected value of the OSPF area number is the same as the OSPF area number of the connection between the first network element device and the second network element device before power-off according to the third message; if the first network element equipment and the second network element equipment are the same, sending a confirmation message to the second network element equipment; if the two network elements are different, sending a rejection message to the second network element device, where the rejection message includes: an OSPF area number where the first network element device is connected to the second network element device before power-off;

in an embodiment of the present invention, the third message is a Configure-Request message, where an OSPF area number option in configuration options of the Configure-Request message is configured as an expected value of an OSPF area number, where the expected value defaults to the OSPF area number where the first network element device is connected to the second network element device before power failure; the confirmation message is a Configure-Ack message; the reject message is a Configure-Ack message, and if the expected value default OSPF area number is modified if the reject message is abnormal, the OSPF area number of the first network element device and the second network element device before power failure is added in the Configure-Ack message; preventing the OSPF area number from being tampered with.

And the second network element equipment sets the OSPF area number connected with the first network element equipment and the second network element equipment before power failure as the area number of the OSPF port.

Corresponding to the third embodiment of the OSPF area number configuration method, referring to fig. 10, after the setting of the OSPF area number as the area number of the OSPF port, the method includes:

step 10C, judging whether the second network element equipment is powered off;

step 20C, if the second network element device is powered off and then powered on again; sending a third packet to the first network element device, where the third packet includes: an expected value for the OSPF area number;

step 50C, receiving a confirmation message or a rejection message fed back by the first network element device according to the third message; and setting the OSPF area number of the connection between the first network element equipment and the second network element equipment before power failure as the area number of the OSPF port.

The OSPF area number configuration method of the third embodiment is described in detail by an example below:

it is applicable to determine the OSPF interface area number, as shown in fig. 11, the network manager normally manages the network element a and the network element B. The network element B is powered back up for some reason and the OSPF interface reconfirms the OSPF area number embodiment. Referring to fig. 12, the method mainly includes the following steps:

step 101C: the network element A uses the port A.1 to communicate with the network element B through the B.2 of the network element, and the OSPF area number is 1.0.0.0;

step 102C: after the network element B is restarted, the port B.2 initiates PPP negotiation communication, and the LCP negotiation is successful, and enters the negotiation stage of NCPs;

step 103C: the IPCP of port b.2 starts to initiate a Configure-Request message Request, and the option fields are filled as follows:

Type：4

Length：6

OSPF Area Id:1.0.0.0；

here port b.2 declares the expected value of the OSPF area number as: 1.0.0.0;

step 104C: port a.1 acknowledges OSPF area number 1.0.0.0 success using a configuration-Ack message with the option fields filled in as follows:

Type：4

Length：6

OSPF Area Id:1.0.0.0；

step 105C: b.2 of network element B continues to use 1.0.0.0 as the area number of the OSPF interface.

When the network element B is restarted after power failure, the IP address of the port B.2 needs to be renegotiated and determined, the IPCP of the port B.2 starts to initiate a Configure-Request message Request to declare an expected value of an OSPF area number, wherein the expected value is the IP address before power failure, and the port A.1 continues to use 1.0.0.0 as the area number of the OSPF interface after the success confirmation of the port A.2; when the network element B equipment is powered off, the area number configuration of the OSPF interface of the network element B can be completed at the location of the network management equipment without the need of carrying out the area number configuration of the OSPF interface at the location of the network element B equipment.

Referring to fig. 13, in an embodiment, the OSPF area code configuring apparatus provided by the present invention includes a first network element apparatus 1; corresponding to the embodiment, the present invention further provides an OSPF area code configuration device, where the OSPF area code configuration device includes a second network element device 2; the first network element device 1 is a device which has accessed to a network, the second network element device 2 is a device which has newly accessed to the network, and the first network element device 1 and the second network element device 2 are connected through a point-to-point link; wherein, the second network element device 2 includes: a request module 21 and a setting module 22; the first network element device 1 comprises a response module 11;

the request module 21 is configured to send a first message to the first network element device 1;

the response module 11 is configured to receive a first packet sent by a second network element device, and send a response message to the second network element device 2 according to the first packet, where the response message includes: an OSPF area number where the first network element device 1 is connected to the second network element device 2;

the setting module 22 is configured to receive a response message fed back by the first network element device 1 according to the first packet, where the response message includes: an OSPF area number where the first network element device 1 is connected to the second network element device 2; setting the OSPF area number as the OSPF port area number.

It should be noted that the point-to-point link in this document is a broad concept of a PPP link, and may be an ethernet link, a GCC channel, or a DCC channel, etc. running the PPP; including physically real point-to-point links, and also including simulated point-to-point links. Wherein the physical point-to-point link is, for example, a GCC channel or a DCC channel running PPP, etc.; the analog point-to-point link is, for example, a link for operating PPP (PPP over Ethernet, PPPoE for short) over Ethernet.

When PPP control IPCP negotiation is carried out between two devices connected by a point-to-point link, the negotiation option of the IPCP is expanded, an OSPF area number negotiation option is added in the negotiation option when the IPCP negotiates the parameters of a network layer, and the OSPF area number negotiation option is used for negotiation and configuration of the OSPF area number; a user in the OSPF area number protocol option (understood as the first network element device 1 in this embodiment) may carry OSPF area number information; the configuration request sender may also be allowed to declare an expected value of the OSPF area number, which may be understood as that the second network element device 2 carries expected value information of the OSPF area number in the first message when sending the first message; it is also possible to allow the second network element apparatus 2 to request the first network element apparatus 1 to provide OSPF area number information.

If the OSPF area number needs to be negotiated, the second network element device 2 does not provide the OSPF area number option in the configuration first message, then the configuration option must be added to the response message fed back by the first network element device 1, the provided OSPF area number must be accepted, or the requirement of the OSPF area number by the second network element device 2 is displayed. By default, the OSPF area number may not be specified.

In an embodiment of the present invention, the first message is a Configure-Request message, and all OSPF area number options in configuration options of the Configure-Request message are configured to be 0, it is considered that the OSPF area number options are not provided in the first message, and the configuration options must be added to an acknowledgement message fed back by the first network element device 1;

Corresponding to the above embodiment of the OSPF area code configuration method, the present invention further provides an OSPF area code configuration device, referring to fig. 14, in an embodiment, the first network element device 1 further includes a comparing module 12, a confirming module 13, and a rejecting module 14; the OSPF area number configuration device further comprises a judgment module 10;

the determining module 10 is configured to determine whether an OSPF area number connected between the first network element device 1 and the second network element device 2 is modified;

the requesting module 21 is further configured to send a second message to the first network element device 1 when the OSPF area number connected between the first network element device 1 and the second network element device 2 is modified; the second packet includes: an expected value for the OSPF area number;

it can be understood that if the OSPF area number of the connection between the first network element apparatus 1 and the second network element apparatus 2 is not modified, the second message does not need to be sent. In an embodiment of the present invention, the second message is a Configure-Request message, where an OSPF area number option in configuration options of the Configure-Request message is configured as an expected value of an OSPF area number, and the expected value is defaulted to the OSPF area number of the connection between the first network element device 1 and the second network element device 2 before being modified;

the comparing module 12 is configured to receive a second message sent by the second device 2 when the OSPF area number connected to the first network element device 1 and the second network element device 2 is modified, where the second message includes: an expected value for the OSPF area number; comparing the expected value of the OSPF area number with the OSPF area number of the first network element equipment 1 connected with the second network element equipment after modification according to the second message;

the confirming module 13 is configured to send a confirmation message to the second network element device 2 when the expected value of the OSPF area number is the same as the OSPF area number connected to the first network element device 1 and the second network element device 2 after modification;

the rejecting module 14 is configured to send a rejecting message to the second network element device 2 when the expected value of the OSPF area number is different from the OSPF area number of the connection between the first network element device 1 and the second network element device 2 after modification, where the rejecting message includes: after modification, the OSPF area number of the connection between the first network element device 1 and the second network element device 2;

The setting module 22 is further configured to receive an acknowledgment message or a rejection message fed back by the first network element device 1 according to the second packet, and set the modified OSPF area number as the area number of the OSPF port.

When the configuration parameters are abnormal and need to be modified and recovered, a professional can remotely modify the OSPF interface area number, and the process is as above and is not described again; there is no need to run between the location of the first network element device 1 and the location of the second network element device 2.

Corresponding to the third embodiment of the OSPF area code configuration method, the present invention further provides an OSPF area code configuration device, referring to fig. 14, in an embodiment:

the judging module 10 is further configured to judge whether the second network element device 2 is powered off;

the request module 21 is further configured to send a third message to the first network element device 1 when the second network element device 2 is powered on again after being powered off, where the third message includes: an expected value for the OSPF area number;

the comparing module 12 is further configured to receive a third message sent by the second network element device 2 when the second network element device 2 is powered on again after being powered off, where the third message includes: an expected value for the OSPF area number; comparing whether the expected value of the OSPF area number is the same as the OSPF area number connected between the first network element device 1 and the second network element device 2 before power-off according to the third message;

the confirming module 13 is further configured to send a confirmation message to the second network element device 2 when the expected value of the OSPF area number is the same as the OSPF area number connected between the first network element device 1 and the second network element device 2 before power failure;

the rejecting module 14 is further configured to, when the expected value of the OSPF area number is different from the OSPF area number of the connection between the first network element apparatus 1 and the second network element apparatus 2 after modification, send a reject message to the second network element apparatus 2, where the reject message includes: an OSPF area number where the first network element device 1 is connected to the second network element device 2 before power-off;

in an embodiment of the present invention, the third message is a Configure-Request message, where an OSPF area number option in configuration options of the Configure-Request message is configured as an expected value of the OSPF area number, where the expected value defaults to the OSPF area number connected between the first network element device 1 and the second network element device 2 before power failure; the confirmation message is a Configure-Ack message; the reject message is a Configure-Ack message, and if the expected value default OSPF area number is modified if the reject message is abnormal, the OSPF area number of the first network element device 1 and the second network element device 2 connected before the power failure is added to the Configure-Ack message; preventing the OSPF area number from being tampered with.

The setting module 22 is further configured to receive an acknowledgment message or a rejection message fed back by the first network element device according to the third packet, and set the OSPF area number where the first network element device 1 and the second network element device 2 are connected before power failure as the area number of the OSPF port.

When the second network element equipment 2 is restarted after power failure, the IP address of the port of the second network element equipment 2 needs to be renegotiated and determined, the IPCP of the port starts to initiate a configuration-Request message Request to declare an expected value of the OSPF area number, the expected value is the IP address before the power failure, and after the port correspondingly connected with the first network element equipment 1 in the first network element equipment 1 successfully confirms the Request, the port of the second network element equipment 2 continuously uses 1.0.0.0 as the area number of the OSPF interface; when the second network element device 2 is powered off, the area number configuration of the OSPF interface of the second network element device 2 can be completed at the location of the network management device without performing the area number configuration of the OSPF interface at the location of the second network element device 2.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An OSPF area number configuration method is characterized in that the method is used for accessing a second network element device to a network through a first network element device, the first network element device is a device already accessed to the network, the second network element device is a device newly accessed to the network, and the first network element device and the second network element device are connected through a point-to-point link; the OSPF area number configuration method comprises the following steps:

receiving a first message sent by the second network element equipment;

sending a response message to the second network element device according to the first packet, where the response message includes: the OSPF area number is connected between the first network element equipment and the second network element equipment;

2. An OSPF area number configuration method is characterized in that the method is used for accessing a second network element device to a network through a first network element device, the first network element device is a device already accessed to the network, the second network element device is a device newly accessed to the network, and the first network element device and the second network element device are connected through a point-to-point link; the OSPF area number configuration method comprises the following steps:

receiving a first message sent by the second network element equipment;

judging whether the second network element equipment is powered off or not;

3. An OSPF area number configuration method is characterized in that the method is used for accessing a second network element device to a network through a first network element device, the first network element device is a device already accessed to the network, the second network element device is a device newly accessed to the network, and the first network element device and the second network element device are connected through a point-to-point link; the OSPF area number configuration method comprises the following steps:

sending a first message to the first network element equipment;

setting the OSPF area number as an OSPF port area number;

setting the modified OSPF area number as the area number of the OSPF port.

4. An OSPF area number configuration method is characterized in that the method is used for accessing a second network element device to a network through a first network element device, the first network element device is a device already accessed to the network, the second network element device is a device newly accessed to the network, and the first network element device and the second network element device are connected through a point-to-point link; the OSPF area number configuration method comprises the following steps:

sending a first message to the first network element equipment;

setting the OSPF area number as an OSPF port area number;

judging whether the second network element equipment is powered off or not;

5. An OSPF area number configuration device is characterized in that the OSPF area number configuration device comprises a first network element device, the first network element device is a device which has accessed a network, a second network element device is a device which has newly accessed the network, and the first network element device and the second network element device are connected through a point-to-point link; wherein the first network element device comprises a response module;

the response module is configured to receive a first packet sent by the second network element device, and send a response message to the second network element device according to the first packet, where the response message includes: the OSPF area number is connected between the first network element equipment and the second network element equipment;

the first network element equipment further comprises a comparison module, a confirmation module and a rejection module; the OSPF area number configuration equipment also comprises a judgment module;

the comparing module is configured to receive a second packet sent by the second network element device when the OSPF area number connected to the first network element device and the second network element device is modified, where the second packet includes: an expected value for the OSPF area number; comparing the expected value of the OSPF area number with the OSPF area number of the first network element equipment and the second network element equipment after modification according to the second message;

6. An OSPF area number configuration device is characterized in that the OSPF area number configuration device comprises a first network element device, the first network element device is a device which has accessed a network, a second network element device is a device which has newly accessed the network, and the first network element device and the second network element device are connected through a point-to-point link; wherein the first network element device comprises a response module;

the judging module is configured to judge whether the second network element device is powered off;

the comparison module is configured to receive a third message sent by the second network element device when the second network element device is powered on again after being powered off, where the third message includes: an expected value for the OSPF area number; comparing whether the expected value of the OSPF area number is the same as the OSPF area number connected between the first network element equipment and the second network element equipment before power-off according to the third message;

the confirming module is configured to send a confirmation message to the second network element device when an expected value of the OSPF area number is the same as the OSPF area number of the connection between the first network element device and the second network element device before power failure;

the rejecting module is configured to send a rejecting message to the second network element device when the expected value of the OSPF area number is different from the OSPF area number of the modified connection between the first network element device and the second network element device, where the rejecting message includes: and the OSPF area number is connected between the first network element equipment and the second network element equipment before power failure.

7. An OSPF area number configuration device is characterized in that the OSPF area number configuration device comprises a second network element device, the first network element device is a device which has accessed a network, the second network element device is a device which newly accesses the network, and the first network element device and the second network element device are connected through a point-to-point link; wherein the second network element device includes: a request module and a setting module;

the request module is configured to send a first packet to the first network element device;

the setting module is configured to receive a response message fed back by the first network element device according to the first packet, where the response message includes: the OSPF area number is connected between the first network element equipment and the second network element equipment; setting the OSPF area number as an OSPF port area number;

the OSPF area number configuration equipment further comprises a judgment module;

8. An OSPF area number configuration device is characterized in that the OSPF area number configuration device comprises a second network element device, the first network element device is a device which has accessed a network, the second network element device is a device which newly accesses the network, and the first network element device and the second network element device are connected through a point-to-point link; wherein the second network element device includes: a request module and a setting module;