CN101127723B - QoS guarantee method for multi-protocol tag exchange L3 virtual private network - Google Patents
QoS guarantee method for multi-protocol tag exchange L3 virtual private network Download PDFInfo
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Abstract
The utility model relates to a service quality guarantee method of a three-layer virtual private network with multiprotocol label interchanging. When the service stream flows into the backbone network, an edge server of the entrance provider adopts the service quality strategy to adjust the service flow label according to the IP priority field of the IP group in the service flow at the entrance interface; after the service flow enters into the backbone network, the edge server of the provider or a main router of the provider adopts the service quality strategy to adjust the service flow label according to the service flow label; when the service flow leaves the backbone network, an edge server of the exit provider adopts the service quality strategy to adjust the IP priority field according to the IP priority field at the exit interface. The service quality guarantee method of the utility model can utilize the label to inherit the IP priority field in the three-layer virtual private network with multiprotocol label interchanging so as to realize adopting the service quality strategy according to the service type, to ensure the service quality of the business traffic.
Description
Technical field
The present invention relates to the network transmission service quality safeguards technique, particularly relate to a kind of multi-protocol label switching three-layer Virtual Private Network QoS guarantee method.
Background technology
Rapid development of Internet is had to its layout and planning again people, and one of them problem demanding prompt solution is exactly how to make the Internet can ensure its service quality (QoS, Quality of Service).This is because QoS is the basis that multiple application is rely and existed on the network, for example application such as IP phone, video request program, video conference.
In traditional IP bearer network, all IP groupings are all treated by nondistinctive being equal to, each router all adopts the strategy of first-in first-out to handle to all IP groupings, do one's best the destination is delivered in the IP grouping, but do not provide any assurance to performances such as the reliability in the IP packet transmission, propagation delaies, this mode obviously can not satisfy higher service quality needs.Thus, in the prior art, in order to ensure that Network Transmission has enough service quality, people have proposed multiple solution, more typically have: RSVP (RSVP, Resource Reservation Protocol), multiprotocol label switching (MPLS, MultiProtocol Lable Switch) etc.Wherein, the principle of MPLS is: each is entered the Business Stream that the IP grouping of mpls domain is formed, type according to the IP grouping, label switch edge router (the LER of mpls domain, Label Edge Router) gives label of this traffic flow assignment, like this, LSR (LSR in all mpls domains, Label Switch Router) receive the Business Stream of this distributing labels after, just the label in the Business Stream of receiving is changed to the own new label predetermined with next router, transmit according to new label then, after the Business Stream of tape label leaves mpls domain, remove label again.
It is to set up Virtual Private Network (VPN that the typical case of MPLS uses, Virtual Private Networks), as shown in Figure 1, comprise customer edge (CE among the MPLS VPN, Customer Edge), provider edge (PE, Provider Edge) and service provider's P (P, Provider).Wherein, CE can be a router, also can be main frame or switch; PE and P are in the backbone network of MPLS VPN.PE directly links to each other with CE, is responsible for vpn service and inserts, and P is responsible for transmitting fast data.Whether participate in the Path selection of Business Stream according to pe router, MPLS VPN is divided into: MPLS three-layer VPN (MPLS L3 VPN, MPLS Layer 3 VPN) and MPLS two-layer VPN (MPLS L2 VPN, MPLS Layer 2 VPN).Use the mode of similar traditional route to transmit among the MPLS L3 VPN, carrying abbreviates Business Stream as by the Business Stream that IP forms on it.For the router that makes service provider can the perception customer network reachability information, the PE of operator and CE carry out the mutual of routing information.IP priority (IPP, IP Precedence) field in the Business Stream in the IP grouping can be reacted the type of service (TOS, Type Of Service) of IP grouping, is used to provide the ability of sorter network grouping, to realize the guarantee of service quality.
Before Business Stream enters backbone network, can use qos policy to adjust the IPP field according to the IPP field of IP grouping in the Business Stream, carry out Path selection or priority adjustment.Wherein, described qos policy can be committed access rate (CAR, a Committed Access Rate) strategy etc.
After Business Stream enters backbone network, the incoming interface of the entry PE of can successively flowing through link to each other with outgoing interface, with entry PE incoming interface and outgoing interface, the incoming interface of other P and the incoming interface and the outgoing interface of outgoing interface and outlet PE of P, can not have other P in this service flow path, and only comprise the P that links to each other with entry PE.PE1 for example shown in Figure 1 is an entry PE, and P links to each other with PE1, and PE2 does not have other P for outlet P.
Entry PE can be provided with two-layer label for this Business Stream, i.e. outer layer label MPLS-EXP and vpn label VPN-EXP.In order to ensure the transmission quality of Business Stream in the backbone network, MPLS L3 VPN has two kinds of mode of operations, is respectively: eject label (POP TAG) mode of operation and 0 label mode of operation.Under POP TAG mode of operation, the Business Stream that adds two-layer label is through after the entry PE, MPLS-EXP according to Business Stream selects the path to enter the P that links to each other with entry PE, when entering the incoming interface of the P that links to each other with entry PE, can eject the MPLS-EXP of Business Stream, later in backbone network between P and the P, all only use the VPN-EXP of qos policy adjustment Business Stream according to the VPN-EXP of Business Stream, until outlet PE at its incoming interface place, VPN-EXP according to Business Stream uses qos policy to adjust the IPP field of IP grouping in the Business Stream, and, take qos policy to adjust this IPP field according to the IPP field of IP grouping in the Business Stream at its outgoing interface place.
Under 0 label mode of operation, the Business Stream that adds two-layer label is through after the entry PE, MPLS-EXP according to Business Stream selects the path to enter the P that links to each other with entry PE, the P that links to each other with PE is at its outgoing interface then, the MPLS-EXP of Business Stream is put 0, use qos policy to adjust this MPLS-EXP according to the Business Stream MPLS-EXP that puts after 0; Between the P and P of backbone network, all only use qos policy to adjust this MPLS-EXP according to Business Stream MPLS-EXP, Business Stream VPN-EXP is invisible in the transmission course of P and P; Outlet PE takes qos policy to adjust Business Stream VPN-EXP at its incoming interface place according to Business Stream MPLS-EXP, and ejects Business Stream MPLS-EXP; Outlet PE is at its outgoing interface place, and the IPP field that IP grouping in the Business Stream is set equals VPN-EXP, and takes qos policy according to the IPP field of the IP grouping that is provided with, and adjusts this IPP field.
In these two kinds of mode of operations, when Business Stream enters backbone network, initial condition lower inlet PE is that Business Stream is provided with MPLS-EXP and VPN-EXP is a default value, this default value is 0 in the prior art, do not get in touch with the IPP field, just can't carry out service quality guarantee yet according to the type of service of IP grouping.For example: before entering backbone network, three Business Streams are arranged, be respectively file transfer Business Stream, speech transmission service stream and video traffic, the router with QoS security function uses qos policy to carry out the flow adjustment according to the IPP field to three Business Streams, realizes the guarantee of QoS; And enter after the backbone network, MPLS-EXP and VPN-EXP and IPP field are irrelevant, qos policy can't be known the Business Stream type of service, also just can't carry out the flow adjustment of Business Stream according to type of service, therefore, the type of service that has also just lost in the backbone network according to the IP grouping ensures the ability of QoS by using qos policy adjustment Business Stream flow.
Summary of the invention
In view of this, main purpose of the present invention is to provide the QoS support method of a kind of MPLS L3 VPN, can avoid in the prior art that PE and P can't utilize qos policy to adjust flow according to the type of service of IP grouping in the MPLS L3 VPN backbone network, be difficult to the problem that ensures service quality thus.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of multi-protocol label switching three-layer Virtual Private Network QoS guarantee method, this method may further comprise the steps: A, when Business Stream enters backbone network, the inlet provider edge is adjusted the Business Stream label at its incoming interface according to the IP precedence field employing quality of service policy of IP grouping in the Business Stream; After B, Business Stream entered backbone network, provider edge or service provider's P adopted quality of service policy to adjust the Business Stream label at its incoming interface or outgoing interface according to the Business Stream label; C, when Business Stream leaves backbone network, the outlet provider edge is adjusted the IP precedence field of IP grouping in the Business Stream according to the Business Stream label, and adopts quality of service policy to adjust this IP precedence field at its outgoing interface according to this IP precedence field.
Wherein, provider edge or service provider's P further comprise after its incoming interface is adjusted the IP precedence field of IP grouping in Business Stream label or the Business Stream:
Provider edge or service provider's P carry out the flow adjustment of Business Stream according to this adjusted Business Stream label or IP precedence field;
, further comprise after the IP precedence field of IP grouping in its outgoing interface adjustment Business Stream label or Business Stream at provider edge or service provider's P:
Provider edge or service provider's P carry out the flow adjustment and/or the Path selection of Business Stream according to this adjusted Business Stream label or IP precedence field.
Wherein, before the described steps A, this method further comprises:
Start the succession IP precedence function of provider edge, the initial value that the two-layer label of Business Stream is set by the inlet provider edge equals the IP precedence field that IP divides into groups in the Business Stream.
In the steps A of multi-protocol label switching three-layer Virtual Private Network QoS guarantee method of the present invention, described label is an outer layer label, and correspondingly, step B comprises:
B11, inlet provider edge adopt quality of service policy to adjust this outer layer label at its outgoing interface according to the Business Stream outer layer label, and, Business Stream is sent to the service provider's P that links to each other with the provider edge that enters the mouth according to this adjusted outer layer label selection path;
B12, with service provider's P of linking to each other of inlet provider edge at its incoming interface, adopt quality of service policy that the vpn label of Business Stream is set according to the Business Stream outer layer label, and the outer layer label of ejection Business Stream, the vpn label according to this setting carries out the Business Stream flow control then; This service provider's P adopts quality of service policy to adjust this vpn label at its outgoing interface according to the Business Stream vpn label, and, Business Stream is sent to the service provider's P or the outlet provider edge of next jumping according to this adjusted vpn label selection path;
B13, other service provider's P adopt quality of service policy to adjust this vpn label at its incoming interface or outgoing interface according to the Business Stream vpn label, and carry out Business Stream flow control or Path selection according to this adjusted vpn label, Business Stream is sent to the service provider's P or the outlet provider edge of next jumping;
Correspondingly, step C is, the outlet provider edge adopts quality of service policy to adjust the IP precedence field of IP grouping in the Business Stream according to the Business Stream vpn label, and carries out the Business Stream flow control according to this adjusted IP precedence field at its incoming interface; The outlet provider edge is at its outgoing interface, IP precedence field according to IP grouping in the Business Stream adopts quality of service policy to adjust this IP precedence field, and, Business Stream is sent to customer edge according to this adjusted IP precedence field selection path.
Or in the steps A of multi-protocol label switching three-layer Virtual Private Network QoS guarantee method of the present invention, described label is an outer layer label, and correspondingly, step B comprises:
B21, inlet provider edge are at its outgoing interface, adopt quality of service policy to adjust this outer layer label according to the Business Stream outer layer label, and, Business Stream is sent to the service provider's P that links to each other with the provider edge that enters the mouth according to this adjusted outer layer label selection path;
B22, with service provider's P of linking to each other of inlet provider edge at its incoming interface, adjust this outer layer label according to Business Stream outer layer label employing quality of service policy, and carry out the Business Stream flow control according to this adjusted outer layer label; This service provider's P puts 0 at its outgoing interface to the Business Stream outer layer label, adopt quality of service policy to adjust this outer layer label according to the outer layer label of putting after 0 then, and, Business Stream is sent to the service provider's P or the outlet provider edge of next jumping according to this adjusted outer layer label selection path;
B23, other service provider's P are at its incoming interface or outgoing interface, adopt quality of service policy to adjust this outer layer label according to the Business Stream outer layer label, and carry out Business Stream flow control or Path selection according to this adjusted outer layer label, Business Stream is sent to the service provider's P or the outlet provider edge of next jumping;
Correspondingly, step C is that the outlet provider edge adopts quality of service policy that the Business Stream vpn label is set at its incoming interface according to the Business Stream outer layer label, eject the Business Stream outer layer label, and carry out the Business Stream flow control according to this adjusted vpn label; The outlet provider edge equals the Business Stream vpn label in the IP precedence field that its outgoing interface at first is provided with IP grouping in the Business Stream, and according to this IP precedence field employing quality of service policy adjustment IP precedence field, select the path according to this adjusted IP precedence field then, Business Stream is sent to customer edge.
Wherein, described quality of service policy is the committed access rate strategy.
The multi-protocol label switching three-layer Virtual Private Network QoS guarantee method that the present invention proposes, have the following advantages:, and use selected qos policy to realize flow adjustment and Path selection based on MPLS-EXP that is provided with and VPN-EXP because entry PE is provided with MPLS-EXP and VPN-EXP according to the IPP field of IP grouping in the MPLS L3 VPN backbone network.Thus, PE or P can make MPLS-EXP and the VPN-EXP as the qos policy foundation in backbone network, outer IPP as the qos policy foundation inherits mutually with backbone network, according to the type of service of IP grouping and utilize qos policy to adjust flow, and then can ensure the service quality of Business Stream.
Description of drawings
Fig. 1 is the topology diagram of MPLS VPN;
Fig. 2 is the label construction schematic diagram of IP grouping in the MPLS L3VPN QoS support method of the present invention;
Fig. 3 is the flow chart of first embodiment of MPLS L3VPN QoS support method of the present invention;
Fig. 4 is the flow chart of first embodiment of MPLS L3VPN QoS support method of the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Core concept of the present invention is: when Business Stream enters backbone network, according to the IPP field that IP in the Business Stream divides into groups Business Stream MPLS-EXP and VPN-EXP are set by entry PE, use selected qos policy to realize flow adjustment and Path selection based on MPLS-EXP that is provided with and VPN-EXP, thus, in backbone network, can use qos policy to adjust flow and selection path according to the type of service of IP grouping in the Business Stream, the outlet PE place adjusts the IP precedence field that IP divides into groups in the Business Stream according to the Business Stream label, has realized the mutual succession of described IP precedence field and Business Stream MPLS-EXP and VPN-EXP thus.
Wherein, described qos policy can be a CAR strategy or based on the Weighted Fair Queuing (CBWFQ of type, Class-Based Weighted Fair Queuing) strategy etc., generally token is set according to total flow, according to token sum and traffic conditions partial service is flowed Priority Service, other Business Stream is abandoned or reduces priority.Qos policy is adjusted the IPP field, and in backbone network, MPLS-EXP and VPN-EXP is adjusted beyond backbone network, adjusts the Business Stream flow and the path of whole network with this.
As shown in Figure 2, the entry PE of MPLS L3 VPN can be provided with two-layer label to Business Stream, i.e. outer layer label MPLS-EXP and vpn label VPN-EXP.Two-layer label inside is only the IPP field of IP grouping.In the process of the transmission in backbone network, according to the MPLS standard, router can not read IP packet content in the Business Stream, only rely on label to carry out Path selection, so qos policy also can't carry out flow adjustment operation according to the IPP field, and can only rely on the content of two-layer label to carry out flow adjustment operation.
Corresponding with two kinds of mode of operations among the MPLS L3 VPN, the present invention has two embodiment, and wherein, first embodiment is corresponding to POP TAG mode of operation, and flow process comprises following steps as shown in Figure 3:
The succession IP precedence function of step 101, startup PE.
Described succession IP precedence function just be meant the IPP field adjustment Business Stream MPLS-EXP of entry PE according to IP grouping in the Business Stream, and outlet PE is adjusted the IPP field of IP grouping in the Business Stream according to Business Stream VPN-EXP.The IP precedence function is inherited in described startup, is meant entry PE or outlet PE are sent enabled instruction, selects PE to enter the mode of operation of inheriting the IP precedence function.For example, start and inherit the IP precedence function at PE1 shown in Figure 1 and PE2 place.
The initial value that step 102, entry PE are provided with the Business Stream label is the IPP field of IP grouping in the Business Stream.
After starting the succession IP precedence function of PE, entry PE can be that Business Stream is provided with VPN-EXP and MPLS-EXP when entering its incoming interface, and the value of setting is its initial value, and among the present invention, two initial values all equal the IPP field.For example at PE1 place shown in Figure 1, if the IPP field of certain Business Stream is 4, the initial value that this Business Stream VPN-EXP and MPLS-EXP then are set simultaneously is 4.
Step 103, entry PE its incoming interface according to Business Stream in the IPP field of IP grouping use qos policy to adjust Business Stream MPLS-EXP, and carry out the flow adjustment according to adjusted Business Stream MPLS-EXP.
The incoming interface of entry PE uses qos policy to adjust Business Stream MPLS-EXP according to the IPP field of IP grouping in the Business Stream, the effect of adjusting Business Stream MPLS-EXP at the incoming interface place of entry PE is: adjust Business Stream MPLS-EXP according to qos policy, with balanced flow, avoid congested.Below in each step, the effect of adjusting label at the incoming interface of PE or P is identical therewith.For example at the incoming interface place of as shown in Figure 1 PE1, two Business Streams this incoming interface of flowing through is arranged, the IPP field of IP grouping is 2 in Business Stream, and the IPP field of IP grouping is 4 in the other Business Stream.Because the restriction of total flow, utilize qos policy to be provided with that the IPP field is 2, Business Stream MPLS-EXP is 2, the IPP field is 4, Business Stream MPLS-EXP is 6, the Business Stream that the prioritised transmission quality of service requirement is high and be provided with.
Step 104, entry PE use qos policy to adjust this Business Stream MPLS-EXP at its outgoing interface according to Business Stream MPLS-EXP, and carry out flow adjustment and Path selection according to this adjusted Business Stream MPLS-EXP, Business Stream are sent to the P that links to each other with entry PE.
Herein for the prior art compatibility, entry PE uses qos policy to adjust this Business Stream MPLS-EXP according to Business Stream MPLS-EXP, the effect of adjusting Business Stream MPLS-EXP at the outgoing interface place of entry PE is, adjust Business Stream MPLS-EXP according to qos policy, adjust the interface service flow flow and arrive the path of next jumping with this, with balanced flow, guaranteed qos.Below in each step, the effect of adjusting label at PE or P outgoing interface place is identical therewith.For example at the outgoing interface place of PE1 shown in Figure 1, article one, carry Business Stream that the IP grouping of label forms this outgoing interface of flowing through, its MPLS-EXP is 6, according to total flow restriction and routing information, utilizing qos policy to adjust this Business Stream MPLS-EXP is 5, and adjusts the Business Stream flow and select the path with this.
Step 105, the P that links to each other with entry PE use qos policy to adjust Business Stream VPN-EXP at its incoming interface according to Business Stream MPLS-EXP, and eject Business Stream MPLS-EXP, according to this adjusted Business Stream VPN-EXP, carry out the flow adjustment then.
Identical with prior art, need to eject Business Stream MPLS-EXP herein, in follow-up flow process, MPLS-EXP no longer has an effect.Thus, need use qos policy, Business Stream VPN-EXP is set, allow Business Stream VPN-EXP inherit the content of Business Stream MPLS-EXP according to Business Stream MPLS-EXP.For example at P place as shown in Figure 1, certain Business Stream MPLS-EXP is 4, uses qos policy thus, and the VPN-EXP that P is provided with this Business Stream is 3, and ejects this Business Stream MPLS-EXP.
Step 106, the P that links to each other with entry PE use qos policy to adjust Business Stream VPN-EXP at its outgoing interface according to Business Stream VPN-EXP, and, Business Stream is sent to and next jumping P or outlet PE according to flow adjustment and Path selection that adjusted Business Stream VPN-EXP carries out Business Stream.
Because Business Stream MPLS-EXP no longer has an effect, so locate to use qos policy to adjust Business Stream VPN-EXP according to Business Stream VPN-EXP.The outgoing interface place of P among Fig. 1 for example, certain bar Business Stream VPN-EXP is 4, P uses qos policy that this Business Stream VPN-EXP is set to be 3, to select the path, carry out the flow adjustment according to this Business Stream VPN-EXP thus.Wherein, it is consistent with MPLS technology in the prior art with Path selection how to utilize VPN-EXP to carry out the flow adjustment.
If next jumping in the Business Stream transmission path is P, then Business Stream is sent to next and jump P, and then execution in step 107, if next jumping in the Business Stream transmission path is an outlet PE, then Business Stream is sent to outlet PE, execution in step 108.
Step 107, other P use qos policy to adjust this Business Stream VPN-EXP at its incoming interface or outgoing interface according to Business Stream VPN-EXP, and according to this adjusted Business Stream VPN-EXP, carry out the flow adjustment and the Path selection of Business Stream, Business Stream is sent to next jumps P or outlet PE.
For other P that do not have joint access PE at its incoming interface and outgoing interface, because Business Stream MPLS-EXP no longer has an effect, so locate to use qos policy to adjust this VPN-EXP according to Business Stream VPN-EXP.
If next jumping in the Business Stream transmission path is P, then Business Stream is sent to next and jump P, continue execution in step 107, if next jumping in the Business Stream transmission path is an outlet PE, then Business Stream is sent to outlet PE, execution in step 108.
Step 108, outlet PE are used qos policy to adjust the IPP field of IP grouping in the Business Stream at its incoming interface according to Business Stream VPN-EXP, and are carried out the flow adjustment of Business Stream according to this adjusted IPP field.
After Business Stream leaves outlet PE, no longer carry label, so need to use qos policy according to the IPP field of wherein IP grouping, just must utilize the IPP field of the grouping of IP in the Business Stream to inherit the value of Business Stream VPN-EXP thus at the incoming interface place of outlet PE, inheritance method is to use qos policy to adjust described IPP field according to Business Stream VPN-EXP.The incoming interface place of PE2 for example shown in Figure 1, the VPN-EXP of certain Business Stream are 4, and the IPP field of using qos policy to adjust IP grouping in this Business Stream according to this Business Stream VPN-EXP is 3, realizes flow equilibrium, avoids congested with this.
Step 109, outlet PE are used qos policy to adjust this IPP field at its outgoing interface according to the IPP field of Business Stream IP grouping, and are carried out the flow adjustment and the Path selection of Business Stream according to this adjusted IPP field.
Outlet PE links to each other with CE, the Business Stream that transmits between the two has not had label, so the IPP field of outlet PE IP grouping in its outgoing interface place needs according to Business Stream uses qos policy to adjust this IPP field, with this adjust Business Stream path, balanced flow, avoid congested.The outgoing interface place of PE2 shown in Figure 1 for example, the IPP field of IP grouping is 4 in certain Business Stream, using qos policy to adjust this IPP field according to this IPP field is 3, with this adjust Business Stream path, balanced flow, avoid congested.
In the above-mentioned steps, described qos policy can be CAR strategy or CBWFQ strategy etc.
Second embodiment is corresponding to 0 label mode of operation, and flow chart includes following steps as shown in Figure 4:
The succession IP precedence function of step 201, startup PE.
Described succession IP precedence function just be meant that entry PE is provided with Business Stream VPN-EXP and MPLS-EXP according to the IPP field of IP grouping in the Business Stream, and outlet PE is adjusted the IPP field of IP grouping in the Business Stream according to Business Stream VPN-EXP or MPLS-EXP.The IP precedence function is inherited in described startup, is meant in entry PE or outlet PE to send enabled instruction, selects PE to enter the mode of operation of inheriting the IP precedence function.For example, start and inherit the IP precedence function at PE1 shown in Figure 1 and PE2 place.
The initial value that step 202, entry PE are provided with the Business Stream label is the IPP field of IP grouping in the Business Stream.
After starting the succession IP precedence function of PE, entry PE can be that Business Stream is provided with VPN-EXP and MPLS-EXP when entering its incoming interface, and the value of setting is its initial value, and in the present invention, two initial values all equal the IPP field.For example at PE1 place shown in Figure 1, if the IPP field of certain Business Stream is 4, the initial value that this Business Stream VPN-EXP and MPLS-EXP then are set simultaneously is 4.
The incoming interface of entry PE uses qos policy to adjust Business Stream MPLS-EXP according to the IPP field of IP grouping in the Business Stream, and the effect of adjusting the Business Stream label at the incoming interface place is according to qos policy adjustment Business Stream label, with balanced flow, to avoid congested.Below in each step, the effect of adjusting label at the incoming interface of PE or P is identical therewith.For example at the incoming interface place of as shown in Figure 1 PE1, two Business Streams this incoming interface of flowing through is arranged, article one, the IPP field of IP grouping is 2 in the Business Stream, and the IPP field of IP grouping is 4 in the other Business Stream, because total flow is limited, utilizes qos policy, it is that 2 Business Stream MPLS-EXP are 2 that the IPP field is set, and the IPP field is set is that 4 Business Stream MPLS-EXP are 6, the Business Stream that the prioritised transmission quality of service requirement is high.
For with the prior art compatibility, entry PE is at its outgoing interface, uses qos policy to adjust this Business Stream MPLS-EXP according to Business Stream MPLS-EXP.
With the prior art compatibility, use qos policy to adjust this Business Stream MPLS-EXP according to Business Stream MPLS-EXP.
It is 0 that step 206, the P that links to each other with entry PE are provided with Business Stream MPLS-EXP at its outgoing interface, use qos policy to adjust this Business Stream MPLS-EXP according to the Business Stream MPLS-EXP that puts after 0, and, Business Stream is sent to and next jumping P or outlet PE according to flow adjustment and Path selection that adjusted Business Stream MPLS-EXP carries out Business Stream.
According to prior art, need put Business Stream MPLS-EXP herein is 0, uses qos policy to adjust this Business Stream MPLS-EXP according to the Business Stream MPLS-EXP that puts after 0.The outgoing interface place of P shown in Figure 1 for example, the MPLS-EXP that puts certain Business Stream earlier is 0, the MPLS-EXP that uses qos policy to adjust this Business Stream according to the Business Stream MPLS-EXP that puts 0 is 2 then.
If next jumping in the Business Stream transmission path is P, then Business Stream is sent to next and jump P, execution in step 207 if next jumping in the Business Stream transmission path is an outlet PE, then sends to outlet PE with Business Stream, execution in step 208.
Do not have incoming interface and the outgoing interface of the P of joint access PE for other, continue to use qos policy to adjust this Business Stream MPLS-EXP according to Business Stream MPLS-EXP.
If next jumping in the Business Stream transmission path is P, then Business Stream is sent to next and jump P, continue execution in step 207, if next jumping in the Business Stream transmission path is an outlet PE, then Business Stream is sent to outlet PE, execution in step 208.
The incoming interface of step 208, outlet PE uses qos policy to adjust Business Stream VPN-EXP according to Business Stream MPLS-EXP, and according to this adjusted Business Stream VPN-EXP, carries out the flow adjustment of Business Stream.
According to prior art, use qos policy to adjust Business Stream VPN-EXP according to Business Stream MPLS-EXP.
Outlet PE links to each other with CE, and the Business Stream that transmits between the two no longer carries label, so outlet PE at its outgoing interface, uses qos policy to adjust this IPP field according to the IPP field of IP grouping in the Business Stream.In order to inherit Business Stream VPN-EXP, the IPP field that needs to be provided with earlier IP grouping in the Business Stream in this step equals this Business Stream VPN-EXP, uses qos policy to adjust this IPP field according to the IPP field that is provided with then, adjusts the path of Business Stream with this, balanced flow avoids congested.The outgoing interface place of PE2 shown in Figure 1 for example, certain Business Stream VPN-EXP is 4, and the IPP field that IP grouping in this Business Stream then is set is 4, uses qos policy according to this IPP field, and adjusting this IPP field is 3.
In the above-mentioned steps, described qos policy can be CAR strategy or CBWFQ strategy etc.
The above is preferred embodiment of the present invention only, is not to be used for limiting protection scope of the present invention.Those skilled in that art should be able to associate; use different qos policys to carry out the adjustment of MPLS-EXP, VPN-EXP and IPP field; make ejection label otherwise in the backbone network or put 0 stamp methods, and other is equal to accordingly to change or replace according to technical scheme of the present invention and design thereof and all should belongs to protection scope of the present invention.
Claims (6)
1. multi-protocol label switching three-layer Virtual Private Network QoS guarantee method is characterized in that this method may further comprise the steps:
A, when Business Stream enters backbone network, the inlet provider edge is at its incoming interface, adopts quality of service policy to adjust the Business Stream label according to the IP precedence field of IP grouping in the Business Stream;
After B, Business Stream entered backbone network, provider edge or service provider's P adopted quality of service policy to adjust the Business Stream label at its incoming interface or outgoing interface according to the Business Stream label;
C, when Business Stream leaves backbone network, the outlet provider edge is adjusted the IP precedence field of IP grouping in the Business Stream according to the Business Stream label in its porch, and adopt quality of service policy to adjust this IP precedence field at its outgoing interface according to this IP precedence field.
2. multi-protocol label switching three-layer Virtual Private Network QoS guarantee method according to claim 1, it is characterized in that, in this method, provider edge or service provider's P further comprise after its incoming interface is adjusted the IP precedence field of IP grouping in Business Stream label or the Business Stream:
Provider edge or service provider's P carry out the flow adjustment of Business Stream according to this adjusted Business Stream label or IP precedence field;
, further comprise after the IP precedence field of IP grouping in its outgoing interface adjustment Business Stream label or Business Stream at provider edge or service provider's P:
Provider edge or service provider's P carry out the flow adjustment and/or the Path selection of Business Stream according to this adjusted Business Stream label or IP precedence field.
3. multi-protocol label switching three-layer Virtual Private Network QoS guarantee method according to claim 1 is characterized in that, before the described steps A, this method further comprises:
Start the succession IP precedence function of provider edge, the initial value that the two-layer label of Business Stream is set by the inlet provider edge equals the IP precedence field that IP divides into groups in the Business Stream.
4. multi-protocol label switching three-layer Virtual Private Network QoS guarantee method according to claim 1 is characterized in that, in the steps A, described label is an outer layer label, and correspondingly, step B comprises:
B11, inlet provider edge adopt quality of service policy to adjust this outer layer label at its outgoing interface according to the Business Stream outer layer label, and, Business Stream is sent to the service provider's P that links to each other with the provider edge that enters the mouth according to this adjusted outer layer label selection path;
B12, with service provider's P of linking to each other of inlet provider edge at its incoming interface, adopt quality of service policy that the vpn label of Business Stream is set according to the Business Stream outer layer label, and the outer layer label of ejection Business Stream, the vpn label according to this setting carries out the Business Stream flow control then; This service provider's P adopts quality of service policy to adjust this vpn label at its outgoing interface according to the Business Stream vpn label, and, Business Stream is sent to the service provider's P or the outlet provider edge of next jumping according to this adjusted vpn label selection path;
B13, other service provider's P adopt quality of service policy to adjust this vpn label at its incoming interface or outgoing interface according to the Business Stream vpn label, and carry out Business Stream flow control or Path selection according to this adjusted vpn label, Business Stream is sent to the service provider's P or the outlet provider edge of next jumping;
Correspondingly, step C is, the outlet provider edge adopts quality of service policy to adjust the IP precedence field of IP grouping in the Business Stream according to the Business Stream vpn label, and carries out the Business Stream flow control according to this adjusted IP precedence field at its incoming interface; The outlet provider edge is at its outgoing interface, IP precedence field according to IP grouping in the Business Stream adopts quality of service policy to adjust this IP precedence field, and, Business Stream is sent to customer edge according to this adjusted IP precedence field selection path.
5. multi-protocol label switching three-layer Virtual Private Network QoS guarantee method according to claim 1 is characterized in that, in the steps A, described label is an outer layer label, and correspondingly, step B comprises:
B21, inlet provider edge are at its outgoing interface, adopt quality of service policy to adjust this outer layer label according to the Business Stream outer layer label, and, Business Stream is sent to the service provider's P that links to each other with the provider edge that enters the mouth according to this adjusted outer layer label selection path;
B22, with service provider's P of linking to each other of inlet provider edge at its incoming interface, adjust this outer layer label according to Business Stream outer layer label employing quality of service policy, and carry out the Business Stream flow control according to this adjusted outer layer label; This service provider's P puts 0 at its outgoing interface to the Business Stream outer layer label, adopt quality of service policy to adjust this outer layer label according to the outer layer label of putting after 0 then, and, Business Stream is sent to the service provider's P or the outlet provider edge of next jumping according to this adjusted outer layer label selection path;
B23, other service provider's P are at its incoming interface or outgoing interface, adopt quality of service policy to adjust this outer layer label according to the Business Stream outer layer label, and carry out Business Stream flow control or Path selection according to this adjusted outer layer label, Business Stream is sent to the service provider's P or the outlet provider edge of next jumping;
Correspondingly, step C is that the outlet provider edge adopts quality of service policy that the Business Stream vpn label is set at its incoming interface according to the Business Stream outer layer label, eject the Business Stream outer layer label, and carry out the Business Stream flow control according to this adjusted vpn label; The outlet provider edge equals the Business Stream vpn label in the IP precedence field that its outgoing interface at first is provided with IP grouping in the Business Stream, and according to this IP precedence field employing quality of service policy adjustment IP precedence field, select the path according to this adjusted IP precedence field then, Business Stream is sent to customer edge.
6. multi-protocol label switching three-layer Virtual Private Network QoS guarantee method according to claim 1 is characterized in that described quality of service policy is the committed access rate strategy.
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| CN102571537A (en) * | 2010-12-22 | 2012-07-11 | 中兴通讯股份有限公司 | Priority inheritance method and system for QoS (Quality of Service) in identifier network |
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| CN103973590B (en) * | 2014-05-23 | 2017-07-04 | 新华三技术有限公司 | A kind of QoS dispatching methods and device |
| CN106161245A (en) * | 2015-04-17 | 2016-11-23 | 中兴通讯股份有限公司 | The method and apparatus transmitting message in the Virtual Private Network of agreement label switched |
| CN106302231B (en) * | 2015-05-12 | 2019-06-28 | 深圳市中兴微电子技术有限公司 | The method and device of traffic queue shaping |
| CN109391561B (en) * | 2017-08-10 | 2022-09-30 | 中国电信股份有限公司 | Dynamic bidirectional guarantee method and system |
| CN113411244A (en) * | 2017-09-30 | 2021-09-17 | 华为技术有限公司 | Cross-domain QoS (quality of service) adjusting method and device |
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