CN100442749C - Method and device for providing service quality in two layer virtual special network - Google Patents
Method and device for providing service quality in two layer virtual special network Download PDFInfo
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- CN100442749C CN100442749C CNB2007100629634A CN200710062963A CN100442749C CN 100442749 C CN100442749 C CN 100442749C CN B2007100629634 A CNB2007100629634 A CN B2007100629634A CN 200710062963 A CN200710062963 A CN 200710062963A CN 100442749 C CN100442749 C CN 100442749C
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Abstract
The method comprises: resolves the message to get the link layer information of frame relay (FR); comparing said link layer information with the information in matching rule; if they are matched, then executing differential QoS; otherwise, continuing to relay the message. The invention uses link information of frame relay link as characterized field to make differential QoS service so as to provide differential QoS in MPLS and L2VPN network based-on frame relay link.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method and apparatus that service quality is provided in a kind of two-layer virtual private network.
Background technology
MPLS L2VPN (multiprotocol label switching double-layer virtual private network network) provides two-layer VPN (VPN (virtual private network)) service based on MPLS (multiprotocol label switching) network, MPLS L2VPN makes operator that the two-layer VPN of different medium can be provided on unified MPLS network, comprises the MPLS L2VPN network based on ATM (asynchronous transfer mode), FR (frame relay), VLAN (VLAN), Ethernet (Ethernet) or PPP (point to point protocol) etc.
Network layer realizes because the realization of existing MPLS L2VPN QoS is based on, promptly by resolving the IP message, then according in the IP message, source IP address, purpose IP address, source port number and purpose section slogan etc. are as tagged word, realize message is carried out the QoS of difference.But in present widely used MPLS L2VPN network based on FR (frame relay) link, when if the user need transmit the frame relay data that does not contain IP layer information, owing to resolve less than IP layer information, wipe away less than tagged word, just can't guarantee, thereby can't satisfy user's demand for the client provides effective QoS.
Summary of the invention
The embodiment of the invention provides the method and apparatus that service quality is provided in a kind of two-layer virtual private network, and the embodiment of the invention has realized providing in the MPLS L2VPN network based on frame relay link the QoS of difference.
The purpose of the embodiment of the invention is to be achieved through the following technical solutions:
The embodiment of the invention provides the method that service quality is provided in a kind of two-layer virtual private network, comprising:
Analytic message obtains the link layer information of frame relay FR;
Information in described link layer information and the matched rule is compared, if coupling is then carried out the QoS of difference, otherwise continued to E-Packet.
The embodiment of the invention also provides a kind of two-layer virtual private network that the equipment of service quality is provided, and comprising:
Packet parsing module: be responsible for analytic message, obtain the link layer information of FR;
The rule match module: be responsible in the message forwarding process, the information in link layer information that obtains and the matched rule that is configured on the Frame Relay Interface is compared, if the identical QoS that then carries out difference, otherwise continue to E-Packet.
The technical scheme that is provided by the invention described above embodiment as can be seen, in the embodiment of the invention, carry out the QoS service of difference by link layer information as feature field, thereby reach the purpose that the QoS of difference is provided in the MPLS L2VPN network based on frame relay link frame relay link.
Description of drawings
Fig. 1 is a MPLS L2VPN networking structure schematic diagram in the embodiment of the invention;
Fig. 2 is the flow chart of embodiment of the invention method;
Fig. 3 is the structural representation of embodiment of the invention equipment.
Embodiment
The embodiment of the invention provides the method that service quality is provided in a kind of two-layer virtual private network based on link layer, in the embodiment of the invention, the link layer information (the DE marker bit or the DLCI of frame relay) of frame relay link is carried out the QoS service of difference as feature field, thereby reach the QoS that difference is provided in the MPLS L2VPN network based on frame relay link.
At first in conjunction with the accompanying drawings the described method of the invention process is elaborated.
As shown in Figure 1, in MPLS L2VPN network, CE is the access device of user side, be responsible for user's message by AC (direct-connected circuit, comprise that the user inserts the employed ATM virtual circuit of L2VPN system, FR virtual circuit or ethernet vlan link etc.) mail to the PE (edge router on the backbone network, link to each other with CE, mainly be responsible for the access of vpn service); Opposite end PE receives user's message, and it is transmitted to connected CE; Such as, CE1 sends to CE2 by PE1, P, PE2 with user's message, that is, and and CE1----＞--PE1-----＞----P-----＞----PE2---＞---CE2.
The specific implementation process of the described method of the embodiment of the invention comprises as shown in Figure 2:
Step 24: the QoS that carries out difference; As, message is carried out CAR (Committed AccessRate, access rate restriction) or remark (heavy label), CAR is exactly that remark carries out mark again to the EXP of MPLS message (Experimental) field to the message flow supervision.
Step 25: continue to E-Packet, as message is transmitted to PE2.
As for the concrete operations of CAR or remark, and the message forwarding process, existing detailed protocol is not that the embodiment of the invention will be paid close attention in the prior art, has not here just elaborated.
Equipment to the embodiment of the invention is elaborated below.
As shown in Figure 3, the described equipment of the embodiment of the invention specifically comprises:
The packet parsing module: the fashionable analytic message of PE side joint be responsible at AC, obtain link layer information, described link layer information can be DE marker bit and/or DLCI field;
Rule match module: be responsible in the message forwarding flow process, the DE of FR in parsing DE marker bit that obtains and the matched rule that is configured on the Frame Relay Interface is compared, the DLCI that also can be the FR in DLCI field that parsing is obtained and the matched rule that is configured on the Frame Relay Interface compares, can also be with parsing obtain DE marker bit and DLCI simultaneously with the matched rule that is configured on the Frame Relay Interface in DE and the DLCI of FR compare, if the identical QoS that then carries out difference, such as CAR or remark, otherwise continue to E-Packet.
Described equipment also comprises:
Information storage module: after packet parsing module parses user's message obtained link layer information, information storage module was responsible for storing described link layer information, for the rule match module invokes.Described information storage module can be an interim intermediate variable.
The equipment of the embodiment of the invention can be the edge router PE on the backbone network.
The technical scheme that is provided by the invention described above embodiment as can be seen, in the embodiment of the invention, carry out the QoS service of difference by link layer information as feature field, thereby reach the purpose that the QoS of difference is provided in the MPLS L2VPN network based on frame relay link frame relay link.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1, the method for service quality is provided in a kind of two-layer virtual private network, it is characterized in that, comprising:
Analytic message obtains the link layer information of frame relay FR;
Information in described link layer information and the matched rule is carried out matching ratio;
When the information matches in described link layer information and the matched rule, carry out the QoS of difference.
2, method according to claim 1 is characterized in that, described method also comprises:
When the information in described link layer information and the matched rule does not match, continue to E-Packet.
3, method according to claim 1, it is characterized in that, described method further comprises: the link layer information of the FR that analytic message is obtained is saved in the interim intermediate variable, and link layer information in the intermediate variable and the information in the matched rule are carried out matching ratio.
4, according to any described method in the claim 1 to 3, it is characterized in that described link layer information comprises: abandon indication DE marker bit and/or data link connection identifier DLCI field.
5, according to any described method in the claim 1 to 3, it is characterized in that the QoS of described difference comprises: flow control CAR or message heavy label remark.
6, a kind of network equipment is characterized in that, comprising:
Packet parsing module: be used for analytic message, obtain the link layer information of FR;
The rule match module: be used in the message forwarding process, will compare from the information packet parsing module link layer information that obtains and the matched rule that is configured on the Frame Relay Interface, if the identical QoS that then carries out difference, otherwise continue to E-Packet.
7, equipment according to claim 6 is characterized in that, described equipment also comprises:
Information storage module: the link layer information that parsing is obtained is saved in the interim intermediate variable, and the rule match module compares link layer information in the intermediate variable and the information in the matched rule.
According to claim 6 or 7 described equipment, it is characterized in that 8, described equipment is the edge router PE on the backbone network.
9, according to claim 6 or 7 described equipment, it is characterized in that the link layer information of described FR comprises: abandon indication DE marker bit and/or data link connection identifier DLCI field.
10, according to claim 6 or 7 described equipment, it is characterized in that the QoS of described difference comprises: flow control CAR or message heavy label remark.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100629634A CN100442749C (en) | 2007-01-23 | 2007-01-23 | Method and device for providing service quality in two layer virtual special network |
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| CNB2007100629634A CN100442749C (en) | 2007-01-23 | 2007-01-23 | Method and device for providing service quality in two layer virtual special network |
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| CN101005436A CN101005436A (en) | 2007-07-25 |
| CN100442749C true CN100442749C (en) | 2008-12-10 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101848143A (en) * | 2010-04-01 | 2010-09-29 | 中兴通讯股份有限公司 | Method and device for processing QoS of flow of virtual private network |
| CN101958902B (en) * | 2010-09-30 | 2013-11-27 | 北京锐安科技有限公司 | Method and device for resolving network data packet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050088977A1 (en) * | 2000-12-14 | 2005-04-28 | Nortel Networks Limited | Dynamic virtual private network (VPN) tunnel quality of service (QoS) treatment |
| CN1625144A (en) * | 2003-12-01 | 2005-06-08 | 华为技术有限公司 | Method for securing service quality in skeletal network of two-stage virtual special network |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050088977A1 (en) * | 2000-12-14 | 2005-04-28 | Nortel Networks Limited | Dynamic virtual private network (VPN) tunnel quality of service (QoS) treatment |
| CN1625144A (en) * | 2003-12-01 | 2005-06-08 | 华为技术有限公司 | Method for securing service quality in skeletal network of two-stage virtual special network |
Non-Patent Citations (2)
| Title |
|---|
| 基于MPLS城域网的VPN设计及实现. 贝灏星.中国科技信息，第23期. 2005 |
| 基于MPLS城域网的VPN设计及实现. 贝灏星.中国科技信息，第23期. 2005 * |
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