CN1852255A - System and method for providing QoS service to virtual special line - Google Patents
System and method for providing QoS service to virtual special line Download PDFInfo
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Abstract
The system includes binding module of virtual circuit PW, tunnel policy module, association unit, access circuit AC, parsing module, and rule module. The parsing module is associated to binding module of virtual circuit PW or tunnel policy module. The parsing module receives and parses message of information from second layer and/or third layer and/or fourth layer, and outputs quality of service types to the association unit. Being associated to the parsing module, the rule module is in use for determining message types in AC, and mapping relation of QoS types as well as down sends mapping relation to the parsing module. The invention can be realized through disclosed two schemes. The invention parses flux on AC. Frame with different QoS requirement can be carried by tunnel with different capabilities of QoS.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of system and method that QoS service is provided for the VLL business.
Background technology
The professional VPWS of VLL (Virtual Private Wire Service) is in IP and two layers of service supporting that multi protocol label exchanges provides point-to-point to be connected on the IP network of MPLS (Multi-Protocol Label Switching).
VPWS provides the point to point service, PTP among the two-layer virtual private network L2VPN (Layer 2 Virtual Private Networks).VPWS provided on ATM or frame-relay network in the past, can also on MPLS or IP network, provide at present, the reference model schematic diagram of VPWS as shown in Figure 1, wherein, CE is that one or more that be positioned at the user side edge connects the equipment of VPWS; PE is the equipment of carrier side network edge, for the user provides VPWS interface and function; The router device P of operator (Provider router) does not possess the interface with the user, therefore the perception of P equipment is less than the existence of VPN, need not safeguard the state of VPN, only provide the tunnel of public network to get final product, for VPWS, CE equipment provides the virtual circuit of a series of point-to-points, the other end of virtual circuit is other CE equipment, the frame that the CE equipment of virtual circuit one end transmits is received by the other end CE equipment of virtual circuit, when E-Packeting between the CE and content of message irrelevant, depend on virtual circuit fully.CE equipment can be any equipment that router, switch, main frame or other users want to insert VPN.
Attachment Circuit among Fig. 1 is place in circuit (abbreviating AC as), and representative of consumer end CE equipment and supplier hold physical link or the logical links that connects between the PE equipment.The kind of AC is a lot, can be that the point-to-point PPP on the physical interface, virtual LAN VLAN, physical interface of Ethernet connects, the label switching protocol LSP of multiprotocol label switching MPLS or the like, and AC carries two layers frame between CE and PE.Pseudo Wire among Fig. 1 is virtual circuit (abbreviating PW as), and PW connects PE equipment, two layers of frame of carrying between PE.Foundation and the maintenance work of PW are finished by PE, and the state information of PW is only safeguarded on the PE at PW two ends, does not need other PE and P equipment to participate in, and for VPWS, is to concern one to one between AC and the PW, respectively binds an AC in the both sides of a PW.
Frame is CE → AC → PE → PW → PE (AC (CE, and this link has constituted the virtual circuit between the CE from the path that transmitting terminal CE arrives the CE process of receiving terminal.
By PSN (public switch network) tunnel (tunnel) carrying, tunnel is an outer layer tunnel to PW between PE, and a tunnel can carry one or more PW, and the end points of PW must be consistent with the end points of tunnel.The tunneling technique that can be used as tunnel is a lot, as MPLS LSP, L2TP Tunnel, IPSEC tunnel or other, because tunnel may carry a plurality of PW, therefore no matter adopts any tunnel, all will finish the demultiplexing of PW at the terminal point in tunnel.
When PE receives a frame from AC after, need to determine and the PW of corresponding AC binding that the module of finishing this function is called forwarder, for VPWS, binding one to one between AC and the PW, therefore, forwarder determines corresponding PW by the AC that receives message.
For the situation that has a plurality of tunnel between the PE, different tunnel may possess different QoS attributes, and which tunnel carrying PW uses depend on the qos requirement of PW.
Transmit two layers of frame by VPWS between CE and the CE, these frames are enjoyed the QoS attribute that tunnel is depended in which kind of QoS service.Corresponding PW of AC in the prior art, PW can only corresponding tunnel, and a tunnel can only provide limited QoS service, and therefore ((mapping between the tunnel can't provide corresponding accurate QoS to ensure to the various frame on the AC, different business to PW to this AC.
Mapping relations in the prior art between AC, PW and the tunnel as shown in Figure 2, two PW of public network tunnel carrying, each PW connects an AC, from this figure as can be seen, AC and PW concern one to one, a public network tunnel then can carry a plurality of PW, but a PW can only be by a tunnel carrying.
For dielectric interconnect of the same race and PE and PE is the situation of different equipment, and above-mentioned mapping relations have problems in some cases:
Set up the tunnel by the MPLS/IP network, utilize Differentiated Services architecture diffserv (Differentiated Service) to carry out QoS and ensure it is VPWS mode commonly used, but the kind in tunnel is diversified, as the time slot of DS-TE tunnel, MPLS L_LSP tunnel, DWDM/SDH, use DDN network or the like, the QoS ability in different tunnels also has nothing in common with each other.The type of the last loaded service of VPWS can be diversified, such as flow of voice, video, data, special main frame or the like, because the AC of VPWS can only bind a PW, and carry by a tunnel, cause the different message on the AC, different business can't provide special various QoS to ensure, when if the user needs tunnel that AC is gone up a certain class or a few class business and provides strict end to end QoS to ensure, using diffserv to carry out the tunnel that QoS ensures can't meet the demands.
Summary of the invention
The technical problem that the present invention solves provides and a kind ofly provides QoS the system and method for service for the VLL business.By the flow on the AC is resolved, the frame that different QoS is required carries by the tunnel of different QoS ability, has realized ensureing for the flow on the AC provides different QoS.
Goal of the invention of the present invention is achieved through the following technical solutions:
A kind of system that QoS service is provided for the VLL business, comprise: virtual circuit PW binding module, tunnel policy module, correlator, place in circuit AC, parsing module and rule module, parsing module and described virtual circuit PW binding module or tunnel policy module relation, described parsing module receives, analytic message is from the information of two layers and/or three layers and/or four layers, output QoS type is to correlator, described rule module is related with parsing module, be used for determining the mapping relations of described AC type of message and QoS type, mapping relations are handed down to parsing module.
Wherein, the information of two layers of described messages and/or three layers and/or four layers comprises: address information and/or protocol type information.
Wherein, described parsing module adopts the binary tree of software administration or the chip (CAM) of content search
Wherein, when parsing module was related with described virtual circuit PW binding module, rule module was determined the mapping relations of type of message and QoS type among the described AC, and mapping relations are issued parsing module and virtual circuit PW binding module.
Wherein, when parsing module and described tunnel policy module relation, rule module is determined the mapping relations of type of message and QoS type among the described AC, and mapping relations are issued parsing module and tunnel policy module.
A kind of for the VLL business provides QoS service method, this method comprises:
A. based on the rule of type of message parsing, key-course is looked unfamiliar into the mapping relations of AC and PW and tunnel, is issued to the correlator of Forwarding plane;
B. Forwarding plane is analyzed the QoS information of message, selects corresponding PW and tunnel.
Wherein, steps A comprises:
A1. the user disposes the mapping relations that AC goes up type of message and PW, rule module is decomposed the rule that described type of message is resolved, and with the parsing module of described rule downloading to Forwarding plane, described virtual circuit PW binding module generates the mapping relations of AC and PW according to AC and described rule;
A2. according to user's configuration, generate the mapping relations of PW and tunnel;
A3. in conjunction with described mapping relations, generate the mapping relations of AC and PW and tunnel, described mapping relations are issued to the correlator of Forwarding plane.
Wherein, steps A comprises:
A4. the user disposes the mapping relations that AC goes up type of message and PW, according to user's configuration, generates the mapping relations of described AC and described PW;
A5. the user disposes the mapping relations that PW goes up type of message and tunnel, rule module is decomposed the rule that described type of message is resolved, and with the parsing module of described rule downloading to Forwarding plane, described tunnelpolicy module generates the mapping relations of PW and tunnel according to PW and described rule;
A6. the aspect of controlling generates the mapping relations of AC and PW and tunnel in conjunction with described mapping relations, described mapping relations is issued to the correlator of Forwarding plane.
Wherein, step B specifically comprises:
B1. Forwarding plane is received message from AC, obtains the AC index of described message;
B2. parsing module is analyzed two layers and/or three layers and/or four layers of information of described message, obtains the QoS information of described message, as index;
B3. make up described AC index and described QoS index, correlator obtains the PW of AC correspondence and the tunnel of carrying according to described index.
The present invention is by increasing parsing module and rule module, parsing module and described virtual circuit PW binding module or tunnel policy module relation, described parsing module receives, analytic message is from the information of two layers and/or three layers and/or four layers, output QoS type is to correlator, described rule module is related with parsing module, be used for determining the mapping relations of described AC type of message and QoS type, mapping relations are handed down to parsing module.The present invention, has realized ensureing for the flow on the AC provides different QoS for the VLL business provides QoS service by two kinds of schemes.
Description of drawings
Fig. 1 is the reference model schematic diagram of the professional VPWS of VLL in the prior art;
Fig. 2 is the mapping relations between AC, PW and the tunnel in the prior art;
Fig. 3 a is a structural representation of the present invention;
Fig. 3 b is a structural representation of the present invention;
Fig. 4 a is the process chart of key-course of the present invention;
Fig. 4 b is the process chart of key-course of the present invention;
Fig. 5 a is the mapping relations between AC, PW among the present invention and the tunnel;
Fig. 5 b is the mapping relations between AC, PW among the present invention and the tunnel;
Fig. 6 transmits the process chart of layer for the present invention.
Embodiment
The flow that the present invention can adopt two kinds of schemes to be embodied as on the AC provides different QoS to ensure.
Scheme one:
Shown in Fig. 3 a, this system comprises: virtual circuit PW binding module, tunnel policy module, correlator, place in circuit AC, parsing module and rule module, parsing module is related with described virtual circuit PW binding module, rule module is determined the corresponding relation of type of message and QoS type among the AC, corresponding relation is handed down to parsing module, the QoS type of message also participates in the binding of PW simultaneously, realize the function that AC internal condition type of message is bound different PW, parsing module is responsible for message is resolved from two layers to four layers information, obtains the QoS type of message.
Wherein, parsing module can adopt the implementation of access control list ACL commonly used in the router, and the coupling that can carry out the various combinations of different field is to various types of messages and professional identification, obtain the QoS type after the identification, be used for related together corresponding PW with AC; Parsing module can adopt the binary tree of software administration, also can adopt the chip (CAM) of content search, and the field that participates in parsing can comprise the two-layer protocol type of frame, L2 address information (MAC), three layers of IP address, three layer protocol types or the like.
Among Fig. 3 a, the module above the dotted line belongs to the control aspect, and the module below the dotted line then belongs to forwarding plane, finishes packet and transmits relevant function.Dotted arrow between control aspect and the forwarding plane represents that forwarding plane issues control information to the control aspect, and these information are used to instruct the binding between AC and PW and PW and the tunnel.
The virtual circuit PW binding module of control aspect is used to set up the mapping relations between AC and the PW; Tunnelpolicy user sets up the mapping relations of PW and tunnel policy, and these two modules are all by configuration driven, and promptly the user realizes by configuration.
The user is by configuration, the mapping relations that some AC go up different type of messages and PW are set, configuration according to the user, rule module generates the rule of packet parsing, the QoS type that generates is used to set up the mapping relations of AC and PW, and the resolution rules with message is issued in the parsing module of Forwarding plane simultaneously.
On the control aspect, virtual circuit PW binding module is finished the binding of AC and PW, and tunnel policy finishes the mapping relations between PW and the tunnel.But for Forwarding plane, can go out corresponding PW and tunnel by the AC direct correlation, improve the efficient of transmitting, therefore need control plane that the mapping relations of AC and PW and the mapping relations of PW and tunnel are combined, directly generate the mapping relations of AC and PW and tunnel, be issued in the correlator, its handling process is shown in Fig. 4 a:
Step 4110: the user disposes the mapping relations that certain AC goes up type of message and PW;
Step 4120: rule module is decomposed the rule that type of message is resolved;
Rule module is decomposed the type of message among the AC and the mapping relations of corresponding PW, produces the matched rule of parsing module, is that corresponding rule generates the QoS type simultaneously.
Step 4130: the rule downloading that rule module is resolved type of message is to the parsing module of forwarding plane;
Step 4140: virtual circuit PW binding module generates the mapping relations of AC and PW according to AC and rule;
Step 4150: the user disposes the strategy of PW binding tunnel;
Step 4160:tunnel policy module generates the mapping relations of PW and tunnel;
Step 4170: the control aspect is in conjunction with mapping relations and the mapping relations generation AC of PW and tunnel and the mapping relations of PW and tunnel of AC and PW;
Step 4180: the control aspect is issued to the mapping relations of AC and PW and tunnel in the correlator of Forwarding plane;
Forwarding plane, at first construct the correspondence table of AC and PW, realize incidence relation between AC and the PW by correspondence table, depositing the mapping relations of whole AC and PW in this correspondence table, is the keyword of searching use with the AC of message subordinate, searches, obtain corresponding PW, the way of searching employing fixed length coupling of the correspondence table of AC and PW can adopt the way of structure binary tree in internal memory, perhaps is placed in the content search chip.
Because the present invention has realized that single AC sets up mapping relations with a plurality of PW, so search key except using AC, has also increased the QoS type of setting up for type of message, this QoS type is resolved according to type of message by parsing module and is obtained.
As shown in Figure 6, Forwarding plane is done following processing:
Step 600: Forwarding plane is received a message from AC;
Step 610: the AC index that takes out message;
Step 620: take out two layers, three layers of message and four layers information and use parsing module to carry out packet parsing;
Step 630: parsing module obtains the QoS type;
Step 640: forwarding plane is an index with AC and QoS type, uses correlator to obtain the PW of AC correspondence and the tunnel of carrying PW.
The mapping relations in AC, PW and tunnel shown in Fig. 5 a, tunnel 1 and tunnel 2 are two tunnels between the identical PE, the end points in these two tunnels overlaps, the difference of the two is the QoS attribute difference in tunnel, therefore to the QoS supportability difference of the flow of carrying, respectively corresponding two PW of AC1 and AC2, the qos requirement that each PW goes up the flow that connects is different, the PW that different QoS requires is carried by the tunnel of different QoS ability.
Scheme two:
Shown in Fig. 3 b, this system comprises: virtual circuit PW binding module, tunnel policy module, correlator, place in circuit AC, parsing module and rule module, parsing module and tunnel policy module relation, wherein, parsing module is responsible for message is resolved from two layers to four layers information, obtains the QoS type of message; Rule module is determined the mapping relations of type of message and QoS type among the AC, and mapping relations are handed down to parsing module, and the QoS type of message also participates in the binding of PW simultaneously, realizes the function that AC internal condition type of message is bound different PW.
Consistent in the function of rule module and parsing module and the scheme one among the present invention, different is that the QoS type plays a role when going out tunnel by the PW association, rather than play a role when going out PW by the AC association, so scheme two can be set up the mapping relations of a PW and a plurality of tunnel.
The virtual circuit PW binding module of control aspect is used to set up the mapping relations between AC and the PW; Tunnelpolicy user sets up the mapping relations of PW and tunnel policy, and these two modules are all by configuration driven, and promptly the user realizes by configuration.
The user is by configuration in the scheme two, the strategy that some PW go up different type of messages and select the tunnel is set, configuration according to the user, rule module generates the rule of packet parsing, the Qos type that generates is used to set up the strategy that PW selects the tunnel, and the resolution rules with message is issued in the parsing module of Forwarding plane simultaneously.
On the control aspect, virtual circuit PW binding module is finished the binding of AC and PW, and tunnel policy finishes the mapping relations between PW and the tunnel.But for Forwarding plane, can go out corresponding PW and tunnel by the AC direct correlation, improve the efficient of transmitting, therefore need control plane that the mapping relations of AC and PW and the mapping relations of PW and tunnel are combined, directly generate the mapping relations of AC and PW and tunnel, be issued in the correlator, its handling process is shown in Fig. 4 b:
Step 4210: the user disposes the mapping relations of AC and PW;
Step 4220: virtual circuit PW binding module generates the mapping relations of AC and PW;
Step 4230: the user disposes the strategy that certain PW goes up type of message binding tunnel;
Step 4240: rule module is decomposed the rule that type of message is resolved;
Step 4250: the rule downloading that rule module is resolved type of message is to the parsing module of forwarding plane;
Step 4260:tunnel policy generates mapping relations according to PW and rule;
Step 4270: the control aspect is in conjunction with mapping relations and the mapping relations generation AC of PW and tunnel and the mapping relations of PW and tunnel of AC and PW;
Step 4280: the control aspect is issued to the mapping relations of AC and PW and tunnel in the correlator of Forwarding plane;
Forwarding plane, at first construct the correspondence table of AC and PW, realize incidence relation between AC and the PW by correspondence table, depositing the mapping relations of whole AC and PW in this correspondence table, is the keyword of searching use with the AC of message subordinate, searches, obtain corresponding PW, the way of searching employing fixed length coupling of the correspondence table of AC and PW can adopt the way of structure binary tree in internal memory, perhaps is placed in the content search chip.
Because the present invention has realized that single AC sets up mapping relations with a plurality of PW, so search key except using AC, has also increased the QoS type of setting up for type of message, this QoS type is resolved according to type of message by parsing module and is obtained, as shown in Figure 6, Forwarding plane is done following processing:
Step 600: Forwarding plane is received a message from AC;
Step 610: the AC index that takes out message;
Step 620: take out two layers, three layers of message and four layers information and use parsing module to carry out packet parsing;
Step 630: parsing module obtains the QoS type;
Step 640: forwarding plane is an index with AC and QoS type, uses correlator to obtain the PW of AC correspondence and the tunnel of carrying PW.
The mapping relations in the AC in the scheme two, PW and tunnel are shown in Fig. 5 b.In Fig. 5 b, tunnel 1 and tunnel 2 are two tunnels between identical PE, the end points in these two tunnels overlaps, the difference of the two is the QoS attribute difference in tunnel, therefore to the QoS supportability difference of the flow of carrying, the respectively corresponding PW of AC1 and AC2, the flow on each PW selects different tunnels to carry according to the difference of frame type.
By the flow on the AC is resolved, the frame that different QoS is required carries by the tunnel of different QoS ability, has realized ensureing for the flow on the AC provides different QoS.
Claims (9)
1. system that QoS service is provided for the VLL business, it is characterized in that, comprise: virtual circuit PW binding module, tunnel policy module, correlator, place in circuit AC, parsing module and rule module, described rule module is related with parsing module, be used for determining the mapping relations of described AC type of message and QoS type, mapping relations are handed down to parsing module, parsing module and described virtual circuit PW binding module or tunnel policy module relation, described parsing module receives, analytic message is from the information of two layers and/or three layers and/or four layers, and output QoS type is to correlator.
2. system according to claim 1 is characterized in that, the information of two layers of described messages and/or three layers and/or four layers comprises: address information and/or protocol type information.
3. system according to claim 2 is characterized in that, described parsing module adopts the binary tree of software administration or the chip (CAM) of content search.
4. according to any described system in the claim 1 to 3, it is characterized in that, when described parsing module is related with described virtual circuit PW binding module, described rule module is determined the mapping relations of type of message and QoS type among the described AC, and mapping relations are issued described parsing module and described virtual circuit PW binding module.
5. according to any described system in the claim 1 to 3, it is characterized in that, when described parsing module and described tunnel policy module relation, described rule module is determined the mapping relations of type of message and QoS type among the described AC, and mapping relations are issued described parsing module and described tunnel policy module.
6. one kind for the VLL business provides QoS service method, it is characterized in that this method comprises:
A. based on the rule of type of message parsing, key-course is looked unfamiliar into the mapping relations of place in circuit AC and virtual circuit PW and tunnel tunnel, issues the correlator of described mapping relations to Forwarding plane;
B. Forwarding plane is analyzed the QoS information of described message, selects corresponding PW and tunnel.
7. method according to claim 6 is characterized in that steps A comprises:
A1. the user disposes the mapping relations that described AC goes up type of message and PW, described rule module is decomposed the rule that described type of message is resolved, and with the parsing module of described rule downloading to Forwarding plane, described virtual circuit PW binding module generates the mapping relations of AC and PW according to AC and described rule;
A2. according to user's configuration, generate the mapping relations of PW and tunnel;
A3. control the mapping relations described in aspect integrating step A1 and the A2, generate the mapping relations of AC and PW and tunnel, described mapping relations are issued to the correlator of Forwarding plane.
8. method according to claim 6 is characterized in that steps A comprises:
A4. the user disposes the mapping relations that described AC goes up type of message and PW, according to user's configuration, generates the mapping relations of described AC and described PW;
A5. the user disposes the mapping relations that described PW goes up type of message and tunnel, rule module is decomposed the rule that described type of message is resolved, and with the parsing module of described rule downloading to Forwarding plane, described tunnelpolicy module generates the mapping relations of PW and tunnel according to PW and described rule;
A6. control the described mapping relations of aspect integrating step A1 and A2, generate the mapping relations of AC and PW and tunnel, described mapping relations are issued to the correlator of Forwarding plane.
9. according to any described method in the claim 6 to 8, it is characterized in that step B specifically comprises:
B1. Forwarding plane is received described message from described AC, obtains the AC index of described message;
B2. described parsing module is analyzed two layers and/or three layers and/or four layers of information of described message, obtains the QoS information of described message, as index;
B3. make up described AC index and described QoS index, described correlator obtains the PW of described AC correspondence and the tunnel of carrying according to described index.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009132568A1 (en) * | 2008-04-30 | 2009-11-05 | 华为技术有限公司 | Control method for quality of service and network device |
| WO2009143722A1 (en) * | 2008-05-28 | 2009-12-03 | 深圳华为通信技术有限公司 | Method and device for implementing differentiated services traffic engineering |
| CN102185778A (en) * | 2011-05-11 | 2011-09-14 | 杭州华三通信技术有限公司 | Method and device for transmitting data based on VLL (Virtual Lease Line) |
| CN101667966B (en) * | 2009-06-11 | 2011-10-26 | 中兴通讯股份有限公司 | Method and system for realizing far-end mirror image of router |
| CN102255787A (en) * | 2010-05-19 | 2011-11-23 | 杭州华三通信技术有限公司 | Message processing method based on quality of service and operator network edge equipment |
| CN101447974B (en) * | 2007-11-26 | 2012-02-22 | 中兴通讯股份有限公司 | Method for achieving VPWS network heterogeneousness by utilizing policy routing and device thereof |
| CN111211982A (en) * | 2019-12-30 | 2020-05-29 | 视联动力信息技术股份有限公司 | Data forwarding method and device, electronic equipment and storage medium |
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| US6005851A (en) * | 1997-10-10 | 1999-12-21 | Nortel Networks Corporation | Adaptive channel control for data service delivery |
| US6259699B1 (en) * | 1997-12-30 | 2001-07-10 | Nexabit Networks, Llc | System architecture for and method of processing packets and/or cells in a common switch |
| WO2003090018A2 (en) * | 2002-04-14 | 2003-10-30 | Bay Microsystems, Inc. | Network processor architecture |
| KR100496984B1 (en) * | 2002-08-21 | 2005-06-23 | 한국전자통신연구원 | A Method of Setting the QoS supported bi-directional Tunnel and distributing L2 VPN membership Information for L2VPN using LDP-extension |
| CN100484054C (en) * | 2003-01-28 | 2009-04-29 | 华为技术有限公司 | System and method for switchingin and transmission of different data frames in digital transmission network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101447974B (en) * | 2007-11-26 | 2012-02-22 | 中兴通讯股份有限公司 | Method for achieving VPWS network heterogeneousness by utilizing policy routing and device thereof |
| WO2009132568A1 (en) * | 2008-04-30 | 2009-11-05 | 华为技术有限公司 | Control method for quality of service and network device |
| CN101272324B (en) * | 2008-04-30 | 2011-02-02 | 华为技术有限公司 | Service quality control method and network appliance |
| WO2009143722A1 (en) * | 2008-05-28 | 2009-12-03 | 深圳华为通信技术有限公司 | Method and device for implementing differentiated services traffic engineering |
| CN101667966B (en) * | 2009-06-11 | 2011-10-26 | 中兴通讯股份有限公司 | Method and system for realizing far-end mirror image of router |
| CN102255787A (en) * | 2010-05-19 | 2011-11-23 | 杭州华三通信技术有限公司 | Message processing method based on quality of service and operator network edge equipment |
| CN102255787B (en) * | 2010-05-19 | 2014-08-13 | 杭州华三通信技术有限公司 | Message processing method based on quality of service and operator network edge equipment |
| CN102185778A (en) * | 2011-05-11 | 2011-09-14 | 杭州华三通信技术有限公司 | Method and device for transmitting data based on VLL (Virtual Lease Line) |
| CN102185778B (en) * | 2011-05-11 | 2014-09-10 | 杭州华三通信技术有限公司 | Method and device for transmitting data based on VLL (Virtual Lease Line) |
| CN111211982A (en) * | 2019-12-30 | 2020-05-29 | 视联动力信息技术股份有限公司 | Data forwarding method and device, electronic equipment and storage medium |
| CN111211982B (en) * | 2019-12-30 | 2022-05-17 | 视联动力信息技术股份有限公司 | Data forwarding method and device, electronic equipment and storage medium |
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