CN104270280A - System and method for realizing LSP (Label Switching Path) ping and tracert on router - Google Patents
System and method for realizing LSP (Label Switching Path) ping and tracert on router Download PDFInfo
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Abstract
The invention discloses a system and a method for realizing LSP (Label Switching Path) ping and tracert on a router, and relates to the field of network communication. The system comprises a control plane and a forwarding plane, wherein the control plane comprises an LSP ping and tracert application module, an IP (Internet Protocol) stack and a control plane signaling drive; the forwarding plane comprises a forwarding plane signaling drive and a forwarding microcode; the IP stack is used for providing a unified packet receiving-transmitting interface for the LSP ping and tracert application module; the control plane signaling drive is used for performing MAC-in-MAC processing on the control plane; and the forwarding plane signaling drive is used for performing MAC-in-MAC processing on the forwarding plane. According to the system and the method, LSP and tracert messages are submitted to the forwarding plane, and corresponding route selection is finished through the forwarding plane, so that the accuracy and instantaneity of LSP and tracert are realized; and meanwhile, the performance is improved greatly, and the burden of the control plane is lowered.
Description
Technical field
The present invention relates to network communication field, specifically relate to the system and method that one realizes LSP (Label Switching Path, label switched path) ping (end-to-end connection) and tracert (traceroute) on the router.
Background technology
In the application of MPLS (Multi-Protocol Label Switching, multiprotocol label switching), for the validity of LSP, the detection of accessibility, there is no highly effective method at present.MPLS system mainly comprises control plane and Forwarding plane, and control plane is responsible for the foundation of MPLS forward-path (LSP), but cannot detect this mistake of LSP transmission data failure.And Forwarding plane is owing to being based on isolated node, also has no idea to know the situation of upstream and downstream and whole piece LSP, therefore, need an instrument allowing user can detect this problem within the rational time, so LSP ping and tracert arises at the historic moment.LSP ping and tracert, by echo (echo) message (comprising request and response) based on UDP (User Data Protocol, User Datagram Protoco (UDP)), detects the connectedness of LSP and the whole piece path of LSP.
Because carrier-class networking is generally with protection scene; in this scene; the activestandby state being realized detecting tunnel by Forwarding plane also realizes switching; the real-time active and standby information in current tunnel; only has Forwarding plane perception, the control plane active and standby information that perception is immediately not current, when causing control plane to send LSP ping detection messages; and do not know this toward which bar LSP sends, this is another difficult point that LSP ping and tracert functional realiey run into.
In addition; when realizing MPLS function on the router; the forwarding capability of MPLS only realizes on Forwarding plane; control plane is without the soft forwarding capability of MPLS; even if support soft forwarding capability, under the scene having active and standby (LSP 1:1) to protect, Forwarding plane hardware energy real-time inspection changes to activestandby state; but chain of command perceives master state, and change has delay very greatly, and within the time period postponed, the activestandby state in chain of command and the face of forwarding exists inconsistent problem.
Summary of the invention
The object of the invention is the deficiency in order to overcome above-mentioned background technology, a kind of system and method realizing LSP ping and tracert is on the router provided, LSP ping and tracert message are submitted to Forwarding plane, corresponding routing is completed by Forwarding plane, realize the accuracy of LSP ping and tracert, real-time, performance can obtain larger lifting simultaneously, reduce the burden of control plane.
The invention provides a kind of system realizing LSP ping and tracert on the router, comprise control plane and Forwarding plane, described control plane comprises LSP ping and tracert application module, IP stack and control plane signaling drive, Forwarding plane comprises Forwarding plane signaling and drives and forward microcode, wherein:
Described LSP ping and tracert application module are used for: process LSP ping and tracert bag being carried out to protocol level;
Described IP stack is used for: for LSP ping and tracert application module provide unified transmitting-receiving packet interface, it is unified transmitting-receiving bag platform, IP stack creates an operation management maintain OAM interface automatically, load OAM interface driver, LSP ping and tracert message are packaged into corresponding MAC-IN-MAC form by OAM interface driver, MAC-IN-MAC is a kind of encapsulation format, for transmitting the information that control plane and Forwarding plane are paid close attention to mutually;
Described control plane signaling drive for: carry out the MAC-IN-MAC process on control plane, the encapsulation MAC-IN-MAC head when control plane sends message, stripping MAC-IN-MAC head when control plane receives message;
Described Forwarding plane signaling drive for: carry out the MAC-IN-MAC process on Forwarding plane;
Described forwarding microcode is used for: when router device is given out a contract for a project, according to the MAC-IN-MAC face LSP information of carrying in front, search LSP and transmit, by upper for message encapsulation LSP tag head, encapsulate uplink layer head again, finally transmit corresponding physical interface from LSP or logic interfacing sends; During as Provider Edge PE node packet receiving, above deliver to Forwarding plane signaling and drive, deliver to control plane by after its unified encapsulation.
On the basis of technique scheme, described IP stack uses OAM interface to send LSP ping and tracert message.
The present invention also provides the method realizing LSP ping and tracert on the router based on said system, comprises the following steps:
A, router device send LSP ping and tracert message:
After step 101, control plane start, IP stack creates an OAM interface automatically, load OAM interface driver, LSP ping and tracert message are packaged into corresponding MAC-IN-MAC form by OAM interface driver, MAC-IN-MAC is a kind of encapsulation format, for transmitting the information that control plane and Forwarding plane are paid close attention to mutually;
Step 102, LSP ping and tracert application module create an original socket of link, are tied on OAM interface;
When step 103, LSP ping and tracert application module send LSP ping bag, the LSP information of bag data division and correspondence is encapsulated in inside a blocks of data according to certain form, then is sent by the original socket of link;
The resource that the original socket of step 104, link provides as IP stack is for the upper layer module comprising LSP ping and tracert application module, IP stack judges whether the interface type of the original socket binding of link is OAM interface, if the interface of the original socket binding of link is OAM interface, then forward step 105 to; Otherwise forward step 106 to;
Step 105, IP stack send out process when giving out a contract for a project, if the interface of the original socket binding of link is OAM interface, then use the OAM interface driver that IP stack loads, by according to assembling time form, the LSP ping that the original socket of parsing link sends and the information that tracert message carries, then Information encapsulation is become the message of band MAC-IN-MAC head, send to Forwarding plane, forward step 107 to;
If the interface of the original socket binding of step 106 link is not OAM interface, then uses the driving of other corresponding types interfaces to encapsulate, forward step 107 to;
Step 107, Forwarding plane signaling drive and receive the MAC-IN-MAC message carrying LSP information to be detected that control plane sends to Forwarding plane, are dealt into forwarding microcode, forward step 108 to;
Step 108, forwarding microcode resolve MAC-IN-MAC form, obtain LSP ping and tracert message and LSP information to be detected, search LSP to transmit, transmit the upper MPLS label of encapsulation according to LSP, then LSP ping and tracert message are sent from corresponding outgoing interface;
B, router device receive LSP ping and tracert message:
Step 201, Forwarding plane receive LSP ping and the tracert message of life span TTL=0 or 1;
After step 202, forwarding microcode identification LSP ping and tracert message, by LSP ping and tracert message up sending to control plane, on when sending, carry the receiving port information of LSP ping and tracert message inside the MAC-IN-MAC form of LSP ping and tracert message;
After step 203, control plane signaling drive the message receiving band MAC-IN-MAC head, the MAC-IN-MAC header parsing according to the message received goes out packet receiving interface, delivers to interface corresponding in IP stack on after then being peeled off by MAC-IN-MAC head;
Step 204, LSP ping and tracert application module create the original socket of link, the original socket of this link non-binding O AM interface, receive LSP ping and tracert message by the original socket of this link from IP stack, carry out the protocol processes of LSP ping and tracert application module afterwards again.
On the basis of technique scheme, step 108 is further comprising the steps of: if LSP to be detected has active and standby scene, and Forwarding plane, when sending LSP ping and tracert message, is selected to send from primary lsp tunnel.
Compared with prior art, advantage of the present invention is as follows:
(1) compared with not managing the scene of the real-time activestandby state of LSP with control plane in existing router device, LSP ping and tracert message are submitted to Forwarding plane by the present invention, corresponding routing is completed by Forwarding plane, the LSP ping of control plane and tracert application module and Forwarding plane have coordinated encapsulation and the transmission of LSP ping and tracert message, realize the accuracy of LSP ping and tracert.
(2) manage with the control plane of existing router device control plane in the scene of the real-time activestandby state of LSP obtain Forwarding plane LSP state not in time compared with, OAM message is submitted to Forwarding plane by the present invention, the MPLS label relevant treatment of OAM message realizes on Forwarding plane, the LSP ping of control plane and tracert application module and Forwarding plane have coordinated encapsulation and the transmission of LSP ping and tracert message, the real-time of LSP ping and tracert can be ensured, performance can obtain larger lifting simultaneously, reduce the burden of control plane.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the system realizing LSP ping and tracert in the embodiment of the present invention on the router.
Fig. 2 is the flow chart that in the embodiment of the present invention, router device sends LSP message.
Fig. 3 is the flow chart that in the embodiment of the present invention, router device receives LSP message.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of system realizing LSP ping and tracert on the router, comprise control plane and Forwarding plane, control plane comprises LSP ping and tracert application module, IP stack and control plane signaling drive, Forwarding plane comprises Forwarding plane signaling and drives and forward microcode, wherein:
LSP ping and tracert application module are used for: process LSP ping and tracert bag being carried out to protocol level;
IP stack is used for: for LSP ping and tracert application module provide unified transmitting-receiving packet interface, it is unified transmitting-receiving bag platform, IP stack creates OAM (Operation, Administration, a Management automatically, operation management maintain) interface, load OAM interface driver, LSP ping and tracert message are packaged into corresponding MAC-IN-MAC form by OAM interface driver, MAC-IN-MAC is a kind of encapsulation format, for transmitting the information that control plane and Forwarding plane are paid close attention to mutually; IP stack uses this OAM interface to send LSP ping and tracert message;
Control plane signaling drive for: carry out the MAC-IN-MAC process on control plane, the encapsulation MAC-IN-MAC head when control plane sends message, stripping MAC-IN-MAC head when control plane receives message;
Forwarding plane signaling drive for: carry out the MAC-IN-MAC process on Forwarding plane;
Forwarding microcode is used for: when router device is given out a contract for a project, according to the MAC-IN-MAC face LSP information of carrying in front, search LSP and transmit, by upper for message encapsulation LSP tag head, encapsulate uplink layer head again, finally transmit corresponding physical interface from LSP or logic interfacing sends; During as PE (Provider Edge, Provider Edge) node packet receiving, above deliver to Forwarding plane signaling and drive, deliver to control plane by after its unified encapsulation.
The embodiment of the present invention provides a kind of method realizing LSPping and tracert on the router based on said system, comprises the following steps:
A, shown in Figure 2, router device sends LSP ping and tracert message:
After step 101, control plane start, IP stack creates an OAM interface automatically, load OAM interface driver, LSP ping and tracert message are packaged into corresponding MAC-IN-MAC form by OAM interface driver, MAC-IN-MAC is a kind of encapsulation format, for transmitting the information that control plane and Forwarding plane are paid close attention to mutually;
Step 102, LSP ping and tracert application module create an original socket of link, are tied on OAM interface;
When step 103, LSP ping and tracert application module send LSP ping bag, the LSP information of bag data division and correspondence is encapsulated in inside a blocks of data according to certain form, then is sent by the original socket of link;
The resource that the original socket of step 104, link provides as IP stack is for the upper layer module comprising LSP ping and tracert application module, IP stack judges whether the interface type of the original socket binding of link is OAM interface, if the interface of the original socket binding of link is OAM interface, then forward step 105 to; Otherwise forward step 106 to;
Step 105, IP stack send out process when giving out a contract for a project, if the interface of the original socket binding of link is OAM interface, then use the OAM interface driver that IP stack loads, by according to assembling time form, the LSP ping that the original socket of parsing link sends and the information that tracert message carries, then Information encapsulation is become the message of band MAC-IN-MAC head, send to Forwarding plane, forward step 107 to;
If the interface of the original socket binding of step 106 link is not OAM interface, then uses the driving of other corresponding types interfaces to encapsulate, forward step 107 to;
Step 107, Forwarding plane signaling drive and receive the MAC-IN-MAC message carrying LSP information to be detected that control plane sends to Forwarding plane, are dealt into forwarding microcode, forward step 108 to;
Step 108, forwarding microcode resolve MAC-IN-MAC form, obtain LSP ping and tracert message and LSP information to be detected, search LSP to transmit, transmit the upper MPLS label of encapsulation according to LSP, then LSP ping and tracert message are sent from corresponding outgoing interface; If LSP to be detected is the scene having active and standby (as LSP1:1), Forwarding plane, when sending LSP ping and tracert message, is selected to send from primary lsp tunnel.
B, shown in Figure 3, router device receives LSP ping and tracert message:
Step 201, Forwarding plane receive LSP ping and the tracert message of TTL (Time To Live, life span)=0 or 1;
After step 202, forwarding microcode identification LSP ping and tracert message, by LSP ping and tracert message up sending to control plane, on when sending, carry the receiving port information of LSP ping and tracert message inside the MAC-IN-MAC form of LSP ping and tracert message;
After step 203, control plane signaling drive the message receiving band MAC-IN-MAC head, the MAC-IN-MAC header parsing according to the message received goes out packet receiving interface, delivers to interface corresponding in IP stack on after then being peeled off by MAC-IN-MAC head;
Step 204, LSP ping and tracert application module create the original socket of link, the original socket of this link non-binding O AM interface, receive LSP ping and tracert message by the original socket of this link from IP stack, carry out the protocol processes of LSP ping and tracert application module afterwards again.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if these amendments and modification are within the scope of the claims in the present invention and equivalent technologies thereof, then these revise and modification also within protection scope of the present invention.
The prior art that the content do not described in detail in specification is known to the skilled person.
Claims (4)
1. one kind realizes the system of LSP ping and tracert on the router, comprise control plane and Forwarding plane, it is characterized in that: described control plane comprises LSP ping and tracert application module, IP stack and control plane signaling drive, Forwarding plane comprises Forwarding plane signaling and drives and forward microcode, wherein:
Described LSP ping and tracert application module are used for: process LSP ping and tracert bag being carried out to protocol level;
Described IP stack is used for: for LSP ping and tracert application module provide unified transmitting-receiving packet interface, it is unified transmitting-receiving bag platform, IP stack creates an operation management maintain OAM interface automatically, load OAM interface driver, LSP ping and tracert message are packaged into corresponding MAC-IN-MAC form by OAM interface driver, MAC-IN-MAC is a kind of encapsulation format, for transmitting the information that control plane and Forwarding plane are paid close attention to mutually;
Described control plane signaling drive for: carry out the MAC-IN-MAC process on control plane, the encapsulation MAC-IN-MAC head when control plane sends message, stripping MAC-IN-MAC head when control plane receives message;
Described Forwarding plane signaling drive for: carry out the MAC-IN-MAC process on Forwarding plane;
Described forwarding microcode is used for: when router device is given out a contract for a project, according to the MAC-IN-MAC face LSP information of carrying in front, search LSP and transmit, by upper for message encapsulation LSP tag head, encapsulate uplink layer head again, finally transmit corresponding physical interface from LSP or logic interfacing sends; During as Provider Edge PE node packet receiving, above deliver to Forwarding plane signaling and drive, deliver to control plane by after its unified encapsulation.
2. realize the system of LSP ping and tracert as claimed in claim 1 on the router, it is characterized in that: described IP stack uses OAM interface to send LSP ping and tracert message.
3., based on the method realizing LSP ping and tracert on the router of system described in claim 1 or 2, it is characterized in that, comprise the following steps:
A, router device send LSP ping and tracert message:
After step 101, control plane start, IP stack creates an OAM interface automatically, load OAM interface driver, LSP ping and tracert message are packaged into corresponding MAC-IN-MAC form by OAM interface driver, MAC-IN-MAC is a kind of encapsulation format, for transmitting the information that control plane and Forwarding plane are paid close attention to mutually;
Step 102, LSP ping and tracert application module create an original socket of link, are tied on OAM interface;
When step 103, LSP ping and tracert application module send LSP ping bag, the LSP information of bag data division and correspondence is encapsulated in inside a blocks of data according to certain form, then is sent by the original socket of link;
The resource that the original socket of step 104, link provides as IP stack is for the upper layer module comprising LSP ping and tracert application module, IP stack judges whether the interface type of the original socket binding of link is OAM interface, if the interface of the original socket binding of link is OAM interface, then forward step 105 to; Otherwise forward step 106 to;
Step 105, IP stack send out process when giving out a contract for a project, if the interface of the original socket binding of link is OAM interface, then use the OAM interface driver that IP stack loads, by according to assembling time form, the LSP ping that the original socket of parsing link sends and the information that tracert message carries, then Information encapsulation is become the message of band MAC-IN-MAC head, send to Forwarding plane, forward step 107 to;
If the interface of the original socket binding of step 106 link is not OAM interface, then uses the driving of other corresponding types interfaces to encapsulate, forward step 107 to;
Step 107, Forwarding plane signaling drive and receive the MAC-IN-MAC message carrying LSP information to be detected that control plane sends to Forwarding plane, are dealt into forwarding microcode, forward step 108 to;
Step 108, forwarding microcode resolve MAC-IN-MAC form, obtain LSP ping and tracert message and LSP information to be detected, search LSP to transmit, transmit the upper MPLS label of encapsulation according to LSP, then LSP ping and tracert message are sent from corresponding outgoing interface;
B, router device receive LSP ping and tracert message:
Step 201, Forwarding plane receive LSP ping and the tracert message of life span TTL=0 or 1;
After step 202, forwarding microcode identification LSP ping and tracert message, by LSP ping and tracert message up sending to control plane, on when sending, carry the receiving port information of LSP ping and tracert message inside the MAC-IN-MAC form of LSP ping and tracert message;
After step 203, control plane signaling drive the message receiving band MAC-IN-MAC head, the MAC-IN-MAC header parsing according to the message received goes out packet receiving interface, delivers to interface corresponding in IP stack on after then being peeled off by MAC-IN-MAC head;
Step 204, LSP ping and tracert application module create the original socket of link, the original socket of this link non-binding O AM interface, receive LSP ping and tracert message by the original socket of this link from IP stack, carry out the protocol processes of LSP ping and tracert application module afterwards again.
4. realize the method for LSP ping and tracert as claimed in claim 3 on the router, it is characterized in that: step 108 is further comprising the steps of: if LSP to be detected has active and standby scene, Forwarding plane, when sending LSP ping and tracert message, is selected to send from primary lsp tunnel.
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| CN104270280B (en) | 2017-11-07 |
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