CN101047651A - Method, system and equipment for setting IP priority level - Google Patents

Abstract

The invention discloses a method, system and equipment for setting IP priority. The priority of IP message is set through the Tag field of IGP (Interior Gateway Protocol, interior gateway protocol), which improves the flexibility of IP priority setting in the domain. , which greatly simplifies the configuration of setting IP priority. The present invention cooperates with the function of BGP (Border Gateway Protocol, Border Gateway Protocol) to use the group attribute to set the IP priority, so that the validity of the IP priority can be continued through the IGP in the domain, and a QoS solution for the entire network is formed.

Description

Method, system and device for setting IP priority

technical field

The invention relates to the technical field of network communication, in particular to a method, system and equipment for setting IP priority.

Background technique

QoS (Quality of Service) is a common concept in various occasions where there is a relationship between service supply and demand. It is used to evaluate the service provider's ability to meet customer service needs. Nowadays, the continuous emergence of many new services has put forward higher requirements on the service capabilities of IP networks. Users are no longer satisfied with simply delivering packets to their destinations, but also hope to get better results in the forwarding process. Services, such as: support to provide users with dedicated bandwidth, reduce packet loss rate, manage and avoid network congestion, regulate network traffic and set packet priority, etc.

In the prior art, the upper-layer software is mainly used in the domain, and the priority of the IP message is set according to specific needs; or on the network device, according to the business needs, the ACL (Access Control List, Access Control List) is used to match the message. Features such as source address, destination address, MAC (Media Access Control, Media Access Control) address, IP protocol or port number of the application program set the priority of the IP packet. Using this method to set the priority of IP packets is complicated to configure, and the steps are cumbersome, and it lacks the flexibility and adjustability of the networking QoS scheme.

In the prior art, the priority of IP packets transmitted between domains is set through the community attribute of BGP. As shown in Figure 1, router B and router D belong to different AS (Autonomous System, autonomous system), AS100 and AS200, respectively. A neighbor relationship of EBGP (EXterior Border Gateway Protocol, External Border Gateway Protocol) is established between Router B and Router D. Router D sends a BGP route to Router B. The BGP route carries community attributes. Community attribute value, which sets the IP priority for the IP packets forwarded by this BGP route. The community attributes carried by different routes may be different, so by identifying the community attributes carried by the routes, the IP priorities set for IP packets may also be different. In this way, router D in AS 200 implements different QoS guarantees for IP packets in its own AS domain according to different IP priorities. However, the function of setting the priority of IP packets by identifying the community attribute of BGP can only be completed between domains, and the validity of the priority of IP packets cannot be continued when IGP is used for route transfer in the domain, that is, intra-domain routing cannot be continued. The IP packet priority function of inter-domain routing cannot make the entire network implement a unified QOS policy.

Contents of the invention

The problem to be solved by the present invention is to provide a method, system and equipment for setting IP priority, so as to solve the problem of complex IP packet priority configuration in the domain, lack of flexible adjustment of networking QoS schemes, and inter-domain The defect that the validity of IP precedence cannot be continued within the domain.

For reaching above-mentioned purpose, a kind of method for setting IP priority of the present invention comprises the following steps:

The network equipment in the autonomous system receives the routing information sent by the initial network equipment, and the routing information includes a priority identifier;

The network device in the autonomous system sets the IP priority of the IP packet sent to the originating network device according to the priority identifier.

Before the initial network device sends routing information, it also includes:

Set the corresponding relationship between IP priority and priority identification;

Set the priority identifier in the Tag field of the routing information.

The network equipment in the autonomous system sets the IP priority for the IP message, specifically including:

The network equipment in the autonomous system queries the routing table entry corresponding to the destination address of the IP packet, and searches for the Tag field value in the routing information corresponding to the routing table entry;

The network equipment in the autonomous system sets the IP priority of the IP packet according to the corresponding relationship between the Tag field value and the IP priority.

The network equipment in the autonomous system receives the routing information sent by the initial network equipment outside the autonomous system, which specifically includes the following steps:

The initial network device sends routing information to the border network device in the autonomous system through the border network device outside the autonomous system, and the routing information includes attribute values;

The border network device in the autonomous system sets the routing information carrying the Tag field value according to the correspondence between the attribute value and the Tag field value, and sends the routing information carrying the Tag field value to other network devices in the autonomous system.

The initial network device sends routing information to the border network device in the autonomous system through the border network device outside the autonomous system, specifically including:

The initial network device sends routing information carrying a Tag field value to a border network device outside the autonomous system;

The border network device outside the autonomous system sets the routing information carrying the attribute value according to the correspondence between the attribute value and the Tag field value, and sends the routing information carrying the attribute value to the border network device in the autonomous system.

Before the initiating network device sends the routing information, it also includes: setting the corresponding relationship between the attribute value and the Tag field value, and setting the corresponding relationship between the Tag field value and the IP priority.

Before the network device in the autonomous system sets the IP priority for the IP message, it also includes: the network device in the autonomous system judges whether the IP priority needs to be changed according to the IP message, and if it needs to be changed, the A network device in the autonomous system sets an IP priority for the IP packet.

The present invention also provides a system for setting IP priority, including: an initial network device and a receiving network device,

The initiating network device is configured to send routing information to a receiving network device, where the routing information includes a priority identifier;

The receiving network device is connected to the starting network device, and is configured to set the IP priority of the IP packet sent to the starting network device according to the priority identifier.

The initial network device includes: a priority setting unit and a routing information sending unit,

The priority setting unit is configured to set a priority identifier in routing information;

The routing information sending unit is connected to the priority setting unit for sending the routing information.

The receiving network device includes: an IP message parsing unit, an IP priority setting unit and an IP message sending unit,

The IP message parsing unit is used to resolve the route used for forwarding the IP message according to the destination address of the IP message, and search for the priority identifier in the routing information corresponding to the route;

The IP priority setting unit is connected to the IP message parsing unit, and is used to set the IP priority of the IP message according to the priority mark;

The IP message sending unit is connected to the IP priority setting unit, and is used to send the IP message with IP priority set.

The receiving network device also includes an IP packet judging unit connected to the IP packet parsing unit for judging whether the priority of the IP packet needs to be changed.

The receiving network device also includes a correspondence storage unit connected to the IP priority setting unit for storing the correspondence between the priority identifier and the IP priority.

The present invention also provides a network device, including: a priority setting unit and a routing information sending unit,

The priority setting unit is configured to set a priority identifier in routing information;

The routing information sending unit is connected to the priority setting unit for sending the routing information.

The present invention also provides a network device, including: an IP message analysis unit, an IP priority setting unit and an IP message sending unit,

The IP message parsing unit is used to resolve the route used for forwarding the IP message according to the destination address of the IP message, and search for the priority identifier in the routing information corresponding to the route;

The IP priority setting unit is connected to the IP message parsing unit, and is used to set the IP priority of the IP message according to the priority mark;

The IP packet sending unit is connected to the IP priority setting unit, and is used for sending IP packets according to the set IP priority.

The network device also includes an IP packet judging unit connected to the IP packet parsing unit for judging whether the IP packet needs to change the IP priority.

The network device also includes a correspondence storage unit connected to the IP priority setting unit for storing the correspondence between the priority identifier and the IP priority.

Compared with the prior art, the present invention has the following advantages:

A method, system and equipment for setting IP priority in the present invention improve the flexibility of setting IP priority in the domain and greatly simplify the configuration of setting IP priority; the present invention and BGP use community attributes to set the function of IP priority Used together, the validity of IP priority can be extended in the domain through IGP, and form a QoS solution for the entire network.

Description of drawings

Fig. 1 is a schematic diagram of setting IP priority through BGP community attributes in the prior art;

Fig. 2 is a flow chart of a method for setting IP priority in the present invention;

Fig. 3 is another flow chart of a kind of setting IP priority method of the present invention;

Fig. 4 is the flowchart of IP message forwarding of the present invention;

5 is a schematic diagram of Embodiment 1 of the present invention;

6 is a schematic diagram of Embodiment 2 of the present invention;

Fig. 7 is a schematic diagram of a system for setting IP priority in the present invention.

Detailed ways

The invention relates to a method for setting IP priority. By setting the corresponding relationship between IP priority and priority identification, the initial network equipment sends routing information carrying priority identification to other network equipment, and other network equipment stores the routing information in the In the routing information database of the corresponding routing protocol, the routing protocol uses its own routing information database for calculation, and adds the calculated route to the routing table to form a route; after receiving the IP message, other network devices The destination address of the network knows that the IP packet needs to be sent to the initial network equipment, so the other network equipment queries its routing table, and checks back the routing information stored in the routing information database of the routing protocol that forms the routing, the routing information Including the priority identifier, and then according to the previously set corresponding relationship between the IP priority and the priority identifier, set the IP priority of the IP packet. The specific flow of the method is shown in Figure 2, including the following steps:

In step S201, a network device in an autonomous system receives routing information sent by an initiating network device, and the routing information includes a priority identifier. The initiating network device sends routing information to the network devices in the autonomous system, and may inform the network devices in the autonomous system to send the IP packet sent to the initiating network device according to the information identified by the priority. The starting network device can be a network device in the autonomous system, or a network device outside the autonomous system; if it is a network device in the autonomous system, the routing information is routing information based on the interior gateway protocol; if it is an autonomous system external network devices, the routing information is routing information based on the Exterior Gateway Protocol.

Step S202, the network device in the autonomous system sets the IP priority of the IP packet sent to the originating network device according to the priority identifier in the routing information. After the network device in the autonomous system receives the routing information sent by the initial network device in step S201, the routing information is stored in the routing information database of the corresponding routing protocol and calculated to form a route, and then the route is added to the routing table; When a network device in the autonomous system receives an IP packet and knows that it needs to send it to the initial network device according to the destination address of the IP packet, it will query the corresponding routing information database according to the corresponding routing entry in the routing table. Store the priority identifier of the routing information, and set the priority of the IP message. The routing information is the routing information sent by the initial network device to the network devices in the autonomous system in step S201.

Before step S201 of the method shown in FIG. 2 , it is necessary to set the corresponding relationship between the IP priority and the priority identifier, and after step S202 , it is also necessary to send the IP message that completes the IP priority. Its flowchart, as shown in Figure 3, includes:

Step S301, setting the corresponding relationship between the IP priority and the priority identifier; the corresponding relationship is stored in the network equipment in the autonomous system during network planning.

Step S302, the initial network device sends routing information to the network devices in the autonomous system, and the routing information includes a priority identification; before sending the routing information, it is necessary to set the priority identification in the routing information, and the priority identification is through automatic or set manually. The initiating network device sends routing information to the network devices in the autonomous system, and may inform the network devices in the autonomous system to send the IP packet sent to the initiating network device according to the information identified by the priority.

Step S303, the network device in the autonomous system sets the IP priority of the IP packet sent to the originating network device according to the priority identifier in the routing information. After the network device in the autonomous system receives the routing information sent by the initial network device in step S302, the routing information is stored in the routing information database of the corresponding routing protocol and calculated to form a route, and the route is added to the routing table; when the autonomous system When a network device in the system receives an IP packet, and according to the destination address of the IP packet, when it knows that it needs to send to the initial network device, it will correspond to the corresponding routing entry in the routing information stored in the routing information database. Priority is set for the IP message, and the routing information is the routing information sent by the initial network device to the network devices in the autonomous system in step S302. The priority setting of the IP message is set according to the corresponding relationship between the previously set IP priority and the priority identification, and the IP priority corresponding to the priority identification in the corresponding relationship is set as the IP message priority.

In step S304, the network device in the autonomous system sends the IP message after setting the IP priority. The network device in the autonomous system sets the IP priority on the IP packet, and sends the IP packet to the originating network device.

As shown in Figure 4, it is the flow chart of IP message forwarding of the present invention, comprises the following steps:

Step S401, the network device receives the IP message, and judges whether the priority of the IP message needs to be changed; if it does not need to be changed, the network device forwards the IP message directly according to the routing table information; if it needs to be changed, then go to Step S402. The network device judges whether the priority of the IP message needs to be changed by judging whether the function in the IP message is enabled, that is, judging whether the function bit of the routing information of the IP message is set.

Step S402, the network device queries the route in the routing table according to the destination address of the IP packet, and queries the routing information generating the route, so as to obtain the priority identifier in the routing information. The network device obtains the destination address of the IP message from the IP message, that is, to whom the IP message needs to be sent; then, the network device queries the routing information corresponding to its route according to the destination address, and the routing information includes priority Identification information, the priority identification is what the network device needs to obtain.

Step S403, the network device sets the IP priority corresponding to the priority ID as the priority for forwarding the IP message according to the previously set correspondence between the IP priority and the priority ID. After the network device obtains the priority identification, since the corresponding relationship between the IP priority and the priority identification is set during network planning, the corresponding IP priority can be obtained according to the corresponding relationship.

Step S404, the network device forwards the IP message according to the IP priority. The network device forwards the IP packet to the target network device according to the setting of the IP priority.

The routing protocol that can realize the present invention includes: OSPF (Open Shortest Path First, opening the shortest route priority agreement), RIP (Routing Information Protocol, routing information protocol) and ISIS (intermediate system) etc.; Also include the routing protocol in Ipv6, include : RIPng, OSPFv3, ISISv6, etc. To sum up, the common feature of these routing protocols is that the routing information of the routing protocols includes the Tag field. The so-called Tag field is a field field in the routing information that does not represent a specific function. In practical applications, the value of this field field can be automatically or manually configured in the corresponding field field in the corresponding routing information message. In addition, the network equipment of the present invention includes routers and switches, etc., which can support routing protocols and QoS guarantees. Therefore, any network equipment supporting routing protocols and QoS guarantees should belong to the scope of protection of the present invention.

Take the router setting the priority of IP packets through the Tag value of OSPF routing information as an example for further description. As shown in FIG. 5 , autonomous system AS100 includes router A, router B, and network C composed of other routers. First of all, when planning the entire network, plan the priority of the IP packets forwarded by route A, and determine the correspondence between the priority and the Tag value in the OSPF routing information; Stored in routers within autonomous system AS100, including router B.

Secondly, set the Tag value in the routing update message for Route A on Router A. The Tag value is the Tag value planned during network planning; if Route A is routed through OSPF Type 5 or Type 7 routes If it is sent, set the Tag value of OSPF Type 5 or Type 7 LSA (Link State Advertisement, Link State Broadcast) to the previously planned Tag value. Router A advertises the LSA of route A to other routers in AS100, and the LSA carries the tag value set before the advertisement.

Then, router B learns route A through network C, stores the LSA of route A in the routing information database of OSPF, calculates and forms route A, and adds it to the routing table of router B to form a route. Tag value set by route A. It should be pointed out that the route calculated by the Type 5 LSA transmitted in OSPF is the Type 5 route of OSPF, and router B adds the Type 5 route to the routing table to form a route; the route calculated by the Type 7 LSA transmitted in OSPF is OSPF class 7 route, router B adds the class 7 route to the routing table to form a route.

When an IP packet is forwarded by Router B and Route A needs to be used, if Router B calculates the routing information of the IP packet as Route A through OSPF, Router B queries the corresponding route in the routing information database according to Route A The Tag value in the information is the Tag value in the OSPF Type 5 or Type 7 LSA, and according to the previously determined IP priority and the corresponding relationship between the Tag value in the OSPF protocol message, set the previous IP priority for the IP message. IP priority determined during network planning.

Finally, according to the IP priority, router B forwards the above IP packet to router A through network C.

Specifically, after the entire network planning, set the IP priority of the IP packets to address A in the entire network to be 1; at the same time, in the OSPF routing protocol, it is used to calculate the routing information of route A. Tag The value is also set to 1, so the corresponding relationship between the IP priority 1 and the Tag value 1 of the routing information of route A is established; router A advertises route A through the OSPF routing protocol, and advertises OSPF type 5 or Set the Tag value to 1 in the Tag field of the Type 7 LSA. Router B learns the routing information of OSPF route A through network C, that is, LSA, stores the routing information LSA of route A in the link state database of OSPF, and calculates route A and adds it to the routing table of router B. When an IP packet is sent to Router B for forwarding using Route A, Router B queries the OSPF link state database for the Tag value in the LSA corresponding to Route A, and the Tag value is 1; then, according to the previously determined IP According to the corresponding relationship between the priority and the Tag value, the IP priority of the IP packet is set to 1; finally, according to the setting that the IP priority is 1, the IP packet is forwarded to router A through network C.

Take the router setting the IP packet priority through the Tag value of the RIP routing information as an example for further description. As shown in FIG. 5 , autonomous system AS100 includes router A, router B, and network C composed of other routers. First, when planning the entire network, plan the priority of the IP packets forwarded by route A, and determine the correspondence between the priority and the Tag value in the RIP routing information; this correspondence is stored during network planning Among the routers within the autonomous system AS100, router B is included.

Secondly, set the Tag value in the routing update message for Route A on Router A. The Tag value is the Tag value planned during network planning; if Route A is routed and sent through RIP, update RIP The Tag value of the packet is set to the previously planned Tag value. Router A advertises route A information to other routers in AS100, and the routing information carries the Tag value set before the information is released.

Then, router B learns the routing information of route A through network C, stores the routing information of route A in the routing information database of RIP, and calculates and forms route A and adds it to the routing table of router B to form a route. Include the Tag value previously set for route A.

When an IP message is forwarded by router B and needs to use route A, router B queries the Tag value of the corresponding routing information stored in the routing information database according to route A, that is, queries the Tag value in the RIP update message, and According to the previously determined correspondence between the IP priority and the Tag value in the RIP protocol message, set the IP priority previously determined during network planning for the IP message.

Finally, according to the IP priority, router B forwards the above IP packet to router A through network C.

Specifically, after the entire network planning, the IP priority of the IP packets to address A in the entire network is set to 2; at the same time, the Tag value used to calculate the routing information of route A in the RIP routing protocol is also set to 2 ; So the corresponding relationship between the IP priority 2 and the Tag value 2 used to calculate the routing information is established. Router A advertises route A through the RIP routing protocol, and sets the Tag value to 2 in the advertised routing information. Router B learns RIP route A through network C, stores the routing information of route A in the routing information database of the RIP routing protocol, and calculates route A and adds it to the routing table of router B. When an IP packet is sent to router B, router B calculates route A through the RIP protocol, and queries the Tag value in the corresponding routing information in the routing information database according to the route A, and the Tag value is 2; then router B according to the previous network According to the correspondence between the IP priority and the tag value determined during planning, set the IP priority of the IP packet to 2. Finally, router B forwards the IP packet to router A through network C according to the IP priority.

In addition, in order to introduce the IP priority outside the autonomous system into the autonomous system, so that the inside and outside of the autonomous system have the same QoS guarantee, the above method of setting IP priority can also be used in conjunction with the function of setting IP priority between autonomous systems. As shown in Figure 6, BGP is used as an example for the routing protocol between autonomous systems, and OSPF type 5 routing is used as an example for the routing protocol within an autonomous system. Between autonomous systems, the priority of IP packets is set through the community attribute of BGP. During network planning, the corresponding relationship between the community attribute of BGP and the Tag value of OSPF type 5 LSAs should be set. Route D in AS200 domain is planned to use this route to forward IP packets with a priority of 1. Router D in AS200 domain advertises route D information to border router B connected to it in AS100 through BGP. The community attribute carried in the routing information is 100:1, and in the corresponding relationship set in the previous network planning, the Tag value of the OSPF Type 5 LSA corresponding to the community attribute 100:1 is 10; the border router B in AS100 receives the route D information, and obtains The community attribute in the routing information is 100:1, and according to the correspondence between the previously set BGP community attribute and the Tag value of the OSPF 5-type LSA, the Tag value 10 of the OSPF 5-type LSA corresponding to the community attribute is found, then Router B advertises the route D information to other routers through the OSPF routing protocol in AS100, and sets the tag value to 10 in the type 5 LSA corresponding to route D. Since the community attribute can only be carried in BGP routing information, when router B advertises route D information through the OSPF routing protocol, the routing information does not carry the community attribute. In this way, route D information is introduced into AS100 through the corresponding relationship between the BGP community attribute set during network planning and the Tag value of OSPF Type 5 LSA. Route D is learned on Router C through OSPF Type 5 routing, and Route D is added to the routing table of Router C.

When an IP packet passes through Router C and is forwarded using Route D, Router C queries the Tag value in the corresponding Type 5 LSA in the OSPF link state database according to Route D stored in its routing table, and according to the previously determined According to the corresponding relationship between the IP priority 1 and the Tag value 10 in the OSPF protocol message, set the IP priority previously determined during network planning for the IP message. Finally, according to the IP priority, router C forwards the aforementioned IP packet to border router B, and then border router B forwards the packet to destination router D of route D through BGP.

On the contrary, if route A in AS100 is planned to use this route to forward IP packets with priority 1, and the corresponding relationship between IP packet priority 1 and OSPF Type 5 LSA tag value 10 is set during network planning, then Router A sets the Tag value to 10 in the OSPF Type 5 LSA sent to Router B. Router B is the border router in the AS100 domain and is connected to the border router D in the AS200 domain. Router B needs to continue to send the information of route A to router D in the AS200 domain, and router B sends routing information to router D through BGP, so router B needs to use the BGP community attribute 100:1 set in the previous network planning Corresponding to the Tag value 10 of OSPF Type 5 LSA, set the community attribute to 100:1 in the BGP routing information, and send the routing information carrying the community attribute 100:1 to router D. After receiving the routing information, router D advertises the routing information to other routers in AS 200 through the OSPF routing protocol, and sets the tag value to 10 in the type 5 LSA corresponding to routing A.

The present invention also provides a system for setting IP priority, as shown in FIG. 7 , including: an originating network device 100 and a receiving network device 200 . Wherein, the starting network device 100 is used to send routing information to the receiving network device 200, and the routing information includes a priority identifier; the receiving network device 200 is connected to the starting network device 100, and is used to set the starting The IP priority of the IP packet sent by the originating network device 100.

The initial network device 100 also includes: a priority setting unit 101 and a routing information sending unit 102 .

The priority setting unit 101 is configured to set the priority identifier in the routing information, and set the planned priority identifier in the corresponding routing information before sending the routing information.

The routing information sending unit 102, the connection priority setting unit 101, is configured to send routing information to the receiving network device 200, the routing information carrying the priority identification information set by the priority setting unit 101.

The receiving network device 200 also includes: an IP packet parsing unit 201 , an IP priority setting unit 202 , an IP packet sending unit 203 , an IP packet judging unit 204 and a correspondence storage unit 205 .

The IP packet parsing unit 201 parses out the destination address of the IP packet, finds out the route used for forwarding, and queries the priority identifier in the routing information generating the route.

The IP priority setting unit 202 is connected to the IP message analysis unit 201, and is used to set the IP priority of the IP message according to the priority mark. After the IP message analysis unit 201 obtains the priority mark of the routing information in the IP message , according to the corresponding relationship between the IP priority and the priority identifier set during the previous network planning, the IP priority corresponding to the priority identifier is set in the IP message.

IP message sending unit 203, connects IP priority setting unit 202, is used to send IP message according to the IP priority of setting; After IP priority setting unit 202 has set the priority of IP message, IP message sending unit 203 The IP packet is sent according to the IP priority.

The IP message judging unit 204 is connected to the IP message analyzing unit 201, and is used to judge whether the received IP message needs to change the priority, if it needs to be changed, then the routing information of the IP message by the IP message analyzing unit 201 Perform priority analysis; if no change is required, the IP packet sending unit 203 will directly forward the IP packet according to the routing forwarding table.

The correspondence storage unit 205, connected to the IP priority setting unit 202, is configured to store the correspondence between the priority identifier and the IP priority.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (16)

1, a kind of method that IP precedence is set is characterized in that, may further comprise the steps:

The network equipment in the autonomous system receives the routing iinformation that initial network equipment sends, and comprises priority tag in the described routing iinformation;

The network equipment in the described autonomous system is provided with the IP precedence of the IP message that sends to described initial network equipment according to described priority tag.

2, the method for IP precedence is set according to claim 1, it is characterized in that, before described initial network equipment sends routing iinformation, also comprise:

Corresponding relation between IP precedence and the priority tag is set;

In the Tag territory of described routing iinformation, priority tag is set.

As the method for IP precedence is set as described in the claim 2, it is characterized in that 3, the network equipment in the described autonomous system is provided with IP precedence to the IP message, specifically comprises:

Network equipment inquiry and the corresponding route table items of described IP message destination address in the described autonomous system, and search with the corresponding routing iinformation of described route table items in the Tag thresholding;

The network equipment in the described autonomous system is provided with the IP precedence of described IP message according to the corresponding relation of described Tag thresholding and IP precedence.

4, the method for IP precedence is set according to claim 1, it is characterized in that, the network equipment in the described autonomous system receives the routing iinformation that the outer initial network equipment of autonomous system sends, and specifically may further comprise the steps:

Described initial network equipment is by the outer border networks equipment of autonomous system, and the border networks equipment in autonomous system sends routing iinformation, comprises property value in the described routing iinformation;

Border networks equipment in the described autonomous system is provided with and carries the routing iinformation of Tag thresholding according to the corresponding relation of property value and Tag thresholding, and the routing iinformation of the described Tag of carrying thresholding is sent to other interior network equipment of autonomous system.

As the method for IP precedence is set as described in the claim 4, it is characterized in that 5, described initial network equipment is by the outer border networks equipment of autonomous system, the border networks equipment in autonomous system sends routing iinformation, specifically comprises:

The border networks equipment of described initial network equipment outside described autonomous system sends and carries the routing iinformation of Tag thresholding;

Border networks equipment outside the described autonomous system is provided with the routing iinformation that carries property value according to the corresponding relation of property value and Tag thresholding, and the described routing iinformation that carries property value is sent to the interior border networks equipment of autonomous system.

As the method for IP precedence is set as described in claim 4 or 5, it is characterized in that 6, described initial network equipment sends before the routing iinformation, also comprises: set property and the corresponding relation of Tag thresholding, and the corresponding relation of Tag thresholding and IP precedence is set.

7, the method for IP precedence is set according to claim 1, it is characterized in that, the network equipment in the described autonomous system is provided with before the IP precedence to the IP message, also comprise: the network equipment in the described autonomous system judges whether that according to described IP message needs change IP precedence, if need to change, the network equipment in the then described autonomous system is provided with IP precedence to described IP message.

8, a kind of system that IP precedence is set is characterized in that, comprising: the initial network equipment and the reception network equipment,

Described initial network equipment is used for sending routing iinformation to receiving the network equipment, comprises priority tag in the described routing iinformation;

The described reception network equipment connects described initial network equipment, is used for according to described priority tag, and the IP precedence of the IP message that sends to described initial network equipment is set.

9, as the system of IP precedence is set as described in the claim 8, it is characterized in that described initial network equipment comprises: priority is provided with unit and routing iinformation transmitting element,

Described priority is provided with the unit, is used at routing iinformation priority tag being set;

Described routing iinformation transmitting element connects described priority the unit is set, and is used to send described routing iinformation.

10, as the system of IP precedence is set as described in the claim 8, it is characterized in that the described reception network equipment comprises: IP packet parsing unit, IP precedence are provided with unit and IP packet sending unit,

Described IP packet parsing unit is used for the destination address according to the IP message, parse to transmit the route that described IP message uses, and search with the corresponding routing iinformation of described route in priority tag;

Described IP precedence is provided with the unit, connects described IP packet parsing unit, is used for according to described priority tag the IP precedence of IP message being set;

Described IP packet sending unit connects described IP precedence the unit is set, and is used to send the IP message that is provided with IP precedence.

11, as the system of IP precedence is set as described in the claim 10, it is characterized in that the described reception network equipment also comprises IP message judging unit, connect described IP packet parsing unit, be used to judge whether described IP message needs to change priority.

12, as the system of IP precedence is set as described in the claim 10, it is characterized in that the described reception network equipment also comprises correspondence relation storage, connect described IP precedence the unit is set, be used for the corresponding relation of memory priority level sign and IP precedence.

13, a kind of network equipment is characterized in that, comprising: priority is provided with unit and routing iinformation transmitting element,

Described priority is provided with the unit, is used at routing iinformation priority tag being set;

Described routing iinformation transmitting element connects described priority the unit is set, and is used to send described routing iinformation.

14, a kind of network equipment is characterized in that, comprising: IP packet parsing unit, IP precedence are provided with unit and IP packet sending unit,

Described IP packet parsing unit is used for the destination address according to the IP message, parse to transmit the route that described IP message uses, and search with the corresponding routing iinformation of described route in priority tag;

Described IP precedence is provided with the unit, connects described IP packet parsing unit, is used for according to described priority tag the IP precedence of IP message being set;

Described IP packet sending unit connects described IP precedence the unit is set, and is used for sending the IP message according to the IP precedence that is provided with.

15, as the network equipment as described in the claim 14, it is characterized in that the described network equipment also comprises IP message judging unit, connect described IP packet parsing unit, be used to judge whether described IP message needs to change IP precedence.

16, as the network equipment as described in the claim 14, it is characterized in that the described network equipment also comprises correspondence relation storage, connect described IP precedence the unit is set, be used for the corresponding relation of memory priority level sign and IP precedence.

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