CN102624601A - Data message transmission method, network device and network system - Google Patents
Data message transmission method, network device and network system Download PDFInfo
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- CN102624601A CN102624601A CN201110031190XA CN201110031190A CN102624601A CN 102624601 A CN102624601 A CN 102624601A CN 201110031190X A CN201110031190X A CN 201110031190XA CN 201110031190 A CN201110031190 A CN 201110031190A CN 102624601 A CN102624601 A CN 102624601A
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Abstract
The invention relates to a data message transmission method which is applied in communication network, wherein the communication network comprises a first PE and a second PE. The method comprises the following steps: the second PE determines whether both the first PE and the second PE support the load-sharing of a data message according to the MPLS tag belonging to the data message and carrying flow classification information according to first and second support information, wherein the support information is the information which support the load-sharing of the data message according to the MPLS tag belonging to the data message and carrying flow classification information; and ifthe first PE and the second PE support the load-sharing of a data message according to the MPLS tag belonging to the data message and carrying flow classification information, the second PE transmits the data message carrying the MPLS tag to the first PE. Through the method, the transmission of the data message only to the PE which can normally receive data message carrying the MPLS tag can be ensured and errors that may appear during data message reception can be avoided.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of data message sending method, network equipment and network system.
Background technology
Border Gateway Protocol (BGP) is a kind of Exterior Gateway Protocol of between different autonomous system (AS), communicating of being used for.Current bgp protocol is supported CIDR (CIDR, ClasslessInter-Domain Routing).Through multi-protocols expansion to BGP; BGP is widely used in the professional control signaling of all kinds of Virtual Private Networks (VPN, Virtual Private Network), like three-layer VPN (L3VPN); Two-layer VPN (L2VPN), VPLS VPLS (Virtual PrivateLAN Service) etc.
In order to improve service transmission bandwidth and reliability, make full use of Internet resources, all kinds of vpn services all hope to use multilink or the path in the network to carry out the load balancing transmission.Guarantee not out of order when simultaneously, most vpn services require in network, to transmit with load balancing to same Business Stream.This requires in network, vpn service stream to be carried out consistent traffic classification and load balancing operation.
IETF is formulating the MPLS/VPN sharing business load mechanism based on label at present.Idiographic flow is for carrying out traffic classification at inlet MPLS router to business, and is that data message is stamped a special MPLS label according to classification results, is used to carry traffic classification information.This is a label with special implication, only is used to identify the traffic classification information of Ingress node to business, is not used in to instruct to transmit.At this moment data message also carries the label that this is used for identifying traffic classification information except that MPLS tunnel label and the service label that possibly exist.When data message carried this traffic classification label, the intermediate router of MPLS network can directly carry out Hash (hash) operation of load balancing according to the MPLS label stack, realize the load balancing to Business Stream.Can simplify the traffic classification of intermediate node like this, also can realize consistent load balancing simultaneously Business Stream.
But; Because the load balancing based on label has carried special label in data message; And this label is not used in reference to derivative according to message forwarding, has changed traditional M PLS/VPN label stack, therefore the situation that egress router leads to errors and handles owing to this label of nonrecognition possibly occur.
Summary of the invention
One object of the present invention is for providing a kind of data message sending method, network equipment and network system.
Technical scheme of the present invention is following:
A kind of data message sending method; Be applied in the communication network; Said communication network comprises the first provider edge equipment PE and the second provider edge equipment PE, and a said PE and said the 2nd PE are respectively two end points that multiprotocol label is transmitted the MPLS network edge, and said method comprises:
Said the 2nd PE receives the first Border Gateway Protocol (BGP) message that a said PE sends; A said BGP message is carried first support information; Wherein, Said support information carries out the information of load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message for supporting, said first support information is that a said PE supports the MPLS label according to the traffic classification information that carries of data message said data message to be carried out the information of load balancing;
Said the 2nd PE safeguards has second support information, and wherein, said second support information is load balancing is carried out in said the 2nd PE support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
Said the 2nd PE confirms according to said first support information and said second support information whether a said PE and the 2nd PE all support according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing;
If then said the 2nd PE sends the data message that carries said MPLS label to a said PE.
A kind of network equipment comprises:
The first Border Gateway Protocol (BGP) message sink unit; Be used to receive the BGP message of carrying first support information that another network equipment sends; Wherein, Said support information carries out the information of load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message for supporting, said first support information is load balancing is carried out in said another network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
The first support information acquiring unit is used for obtaining said first support information from a said BGP message;
The second support information maintenance unit is used to safeguard second support information, and said second support information is load balancing is carried out in the said network equipment self support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
Confirmation unit is used for confirming according to said first support information and said second support information whether a said PE and the 2nd PE all support according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing;
Transmitting element; Be used for after confirming that the said network equipment and said another network equipment support that all MPLS label according to the traffic classification information that carries of data message carries out load balancing to said data message, sending the data message that carries said MPLS label to said another network equipment.
A kind of network system comprises first network equipment and second network equipment;
Said first network equipment comprises:
The first Border Gateway Protocol (BGP) message sending unit; Be used for sending a BGP message of carrying first support information to said second network equipment; Wherein, Said support information carries out the information of load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message for supporting, said first support information is load balancing is carried out in said first network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
The data message receiving element is used to receive the said data message that carry said MPLS label of said second network equipment to its transmission;
Traffic classification tag-drop unit is used for the MPLS tag-drop that carries said traffic classification information with said.
Said second network equipment comprises:
The one BGP message sink unit is used to receive a said BGP message;
The first support information acquiring unit is used for obtaining said first support information from a said BGP message;
The second support information maintenance unit is used to safeguard second support information, and said second support information is load balancing is carried out in said second network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
Confirmation unit confirms according to said first support information and said second support information whether said first network equipment and second network equipment are all supported according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing;
Transmitting element; Be used for after confirming that said first network equipment and second network equipment support that all MPLS label according to the traffic classification information that carries of data message carries out load balancing to said data message, sending the data message that carries said MPLS label to said first network equipment.
Advantage of the present invention only can guaranteed to supporting the MPLS label according to the traffic classification information that carries of data message that the PE that said data message carries out load balancing is sent said data message.Because support can be discerned said MPLS label according to the MPLS label of the traffic classification information that carries of data message to the PE that said data message carries out load balancing; Do not use said MPLS label to instruct data message forwarding, therefore can prevent when receiving said data message, to make mistakes.
Description of drawings
Shown in Figure 1 is schematic network Organization Chart in the one embodiment of the invention;
Shown in Figure 2 is the device sketch map of one embodiment of the invention;
Shown in Figure 3 is the system schematic of one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is launched to specify.But it is noted that these following embodiment, be merely help and understand the example that technical scheme is takeed, and be not used in qualification the present invention.
One embodiment of the present of invention are following.
In communication network, comprise first provider edge equipment (PE) and second provider edge equipment
(PE), a said PE and the 2nd PE are respectively two end points of MPLS network edge.A said PE and the 2nd PE can communicate through said a plurality of operators equipment (P).For the message that sends to said the 2nd PE from a said PE, a said PE is inlet, and said the 2nd PE is outlet; Send to the message of a said PE for said the 2nd PE, said the 2nd PE is inlet, and a said PE is outlet.For example, in communication network shown in Figure 1, a said PE can be represented that said the 2nd PE can be represented by PE2 by PE1.
Said second provider edge equipment (PE) receives first Border Gateway Protocol (BGP) message that said first provider edge equipment (PE) sends; A said BGP message is carried first support information; Said support information carries out the information of load balancing to said data message according to the MPLS label of the traffic classification information that carries of data message for support; Said first support information is that a said PE supports according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out the information of load balancing;
Said the 2nd PE safeguards that it is load balancing is carried out in said the 2nd PE support to said data message according to the MPLS label of the traffic classification information that carries of data message information that second support information, said second support information are arranged;
Said the 2nd PE confirms according to said first support information and said second support information whether a said PE and the 2nd PE all support according to the MPLS label of data message said data message to be carried out load balancing;
If then said the 2nd PE sends the data message that carries said MPLS label to a said PE.
Preferably; When PE supports MPLS label according to the traffic classification information that carries of data message that said data message is carried out load balancing; Said PE can carry out traffic classification to the data message; And can in data message, identify the said MPLS label that carries traffic classification information, and confirm that the said MPLS label that carries traffic classification information is not used in reference to derivative according to message forwarding by said PE.
Preferably; P equipment between a said PE and the 2nd PE is receiving after said the 2nd PE mails to the data message of the said MPLS label of carrying of a PE; Label stack based on said data message carries out load balancing to said data message, sends said data message to a said PE with the mode of load balancing.
Preferably, said the 2nd PE carries out load balancing based on the label stack of said data message to said data message, sends said data message with the mode of load balancing to said P equipment.And then continue said data message to be sent to a said PE with the mode of load balancing by said P equipment.
Preferably, if not, then said the 2nd PE sends the data message that does not carry said MPLS label to a said PE.
Preferably, in a said BGP message, also comprise a MPLS positioning label that distributes by a said PE.Perhaps; In a said BGP message, also comprise the information of notifying said the 2nd PE to encapsulate the MPLS positioning label of reserving for its data message that sends to a said PE; The MPLS positioning label of said reservation is safeguarded by the Internet digital distribution mechanism (IANA, Internet Assigned NumbersAuthority).
Said MPLS positioning label is used for sending at said the 2nd PE the said position that carries the MPLS label of said traffic classification information of label stack sign of the data message of a said PE by said the 2nd PE.That is to say; Said the 2nd PE sends to the said MPLS positioning label of encapsulation in the label stack of data message of a said PE at it; Identify the said position that carries the MPLS label of said traffic classification information, so that make a said PE obtain the MPLS label that carries said traffic classification information in the said data message according to said MPLS positioning label.
Preferably, said the 2nd PE carries out load balancing according to the said traffic classification information in the said MPLS label that carries traffic classification information to the data message that sends to a said PE.
Preferably, a said BGP message is bgp update (UPDATE) message, and said bgp update message is carried said first support information through a new BGP extended community attribute (Extended Community).Preferably, the MPLS positioning label of said PE distribution perhaps notifies said the 2nd PE also to carry through said new BGP extended community attribute for the information that its data message that sends to a said PE encapsulates the MPLS positioning label of reserving.Alternatively, said first support information also can carry through original BGP extended community attribute field in the expansion bgp update message.
Perhaps, a said BGP message is bgp update message, and said bgp update message is carried said first support information through a new BGP routing property.Preferably, the MPLS positioning label of said PE distribution perhaps notifies said the 2nd PE also to carry through said new BGP routing property for the information that its data message that sends to a said PE encapsulates the MPLS positioning label of reserving.Alternatively, said first support information also can carry through expanding original BGP routing property field.
Perhaps, a said BGP message is opened (OPEN) message for the BGP of ietf standard RFC4271 definition or use.
Preferably, said the 2nd PE also sends said second support information to a said PE.Further preferably, a said PE confirms with said second support information that receives whether a said PE and the 2nd PE all support according to the MPLS label of data message said data message to be carried out load balancing according to said first support information of self maintained;
If a then said PE sends the data message that comprises the MPLS label that carries traffic classification information to said the 2nd PE.
Preferably, said the 2nd PE also receives the data message that a said PE sends, and comprises the MPLS label that carries traffic classification information in the data message that a said PE sends.Because said the 2nd PE supports according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing; Therefore said the 2nd PE MPLS label that can identify the traffic classification information that carries in the said data message is not used in reference to derivative according to forwarding by said the 2nd PE; Therefore, said the 2nd PE is with the said MPLS tag-drop that carries traffic classification information.
Preferably; When comprising a MPLS positioning label in the data message that a said PE sends; Said the 2nd PE confirms the said position of MPLS label in the data message that a said PE sends that carries traffic classification information according to said MPLS positioning label, thereby can be quickly and accurately with the said MPLS tag-drop that carries traffic classification information.
Preferably, said support information has the announcement granularity, and said announcement granularity comprises: every advertising of route, every ingress router-egress router incidence relation announcement, the announcement of every VPN instance, every address family/subaddressing family (AFI/SAFI) announcement or every PE announcement.
Said every advertising of route is meant that a PE shares based on the holding load of label specific route prefix support to one or more other PE announcements these PE self.
Said every ingress router-egress router incidence relation announcement is meant that a PE announces a said PE self to another PE and specific ingress router-egress router connected the load balancing of supporting based on label.
Every VPN instance announcement is meant that a PE announces these PE self to the information of specific VPN instance support based on the load balancing of label to one or more other PE.
Every AFI/SAFI announcement is meant that a PE supports the information based on the load balancing of label to one or more other PE announcements these PE self to particular address family/subaddressing family.
Every PE announcement is meant that a PE all supports the information based on the load balancing of label to one or more other PE announcements these PE self to all business.
When the announcement granularity of said support information was every PE announcement, PE was to the support information of whole network notifications self.All opposite end PE obtain the support information of said PE, and like this, to mailing to all business of said PE, the PE of all opposite ends can carry out the load balancing that carries the MPLS label of traffic classification information based on said.For example, a said PE is to the support information of whole network notifications self, and said the 2nd PE obtains the support information of a said PE.Negotiations process about the information of said load balancing between each PE can be carried out through BGP OPEN message.This mode only is applicable between the PE in the network it is the situation of interconnected entirely (full mesh).
For the situation of having used Router Reflector (Route Reflector) in the network, a PE can be through sending Update message, and other bgp routers are announced the support information of said PE in network.Said Update message can not carried any route prefix information, only carries the extended community attribute or the routing property of the support information that comprises said PE; Perhaps, said Update message only carry PE the BGP identifier (ID, Identifier) or local address (local address) as route prefix information, carry the extended community attribute or the routing property of the support information that comprises said PE simultaneously.For example, a said PE is through the support information of said Update message to whole network notifications self.
When the announcement granularity of said support information is every advertising of route; Enable to carry out the route prefix of load balancing based on label for hope; A PE is when the update message of said route prefix is carried in transmission; In said update message, carry the extended community attribute or the routing property of the support information that comprises said PE, can realize only specific route prefix announcement support being carried out said data message according to the MPLS label of the traffic classification information that carries of data message the information of load balancing.
Preferably, in communication network, not only comprise a said PE and the 2nd PE, can also comprise a plurality of other PE.Comprise at communication network between a plurality of PE of a said PE and the 2nd PE; Also can send said support information each other, so that PE determines whether to adopt based on the load balancing mode of the MPLS label that carries traffic classification information to another PE literary composition that sends datagram.
One embodiment of the present of invention are following.
A kind of network equipment with routing function, as shown in Figure 2, comprising:
First Border Gateway Protocol (BGP) message sink unit; Be used to receive the BGP message of carrying first support information that another network equipment sends; Wherein, Said support information carries out the information of load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message for supporting, said first support information is load balancing is carried out in said another network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
The first support information acquiring unit is used for obtaining said first support information from a said BGP message;
The second support information maintenance unit is used to safeguard second support information, and said second support information is load balancing is carried out in the said network equipment self support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
Confirmation unit is used for confirming according to said first support information and said second support information whether the said network equipment and another network equipment are all supported according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing;
Transmitting element; Be used for after confirming that the said network equipment and said another network equipment support that all MPLS label according to the traffic classification information that carries of data message carries out load balancing to said data message, sending the data message that carries said MPLS label to said another network equipment.
Preferably, said transmitting element carries out load balancing based on the label stack of said data message to said data message, sends said data message with the mode of load balancing.
Preferably; When a network equipment support is carried out load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message; The said network equipment can carry out traffic classification to the data message; And can in data message, identify the said MPLS label that carries traffic classification information, and confirm that the said MPLS label that carries traffic classification information is not used in reference to derivative according to message forwarding by said PE.
Preferably, the said network equipment also comprises MPLS positioning label acquiring unit,, be used for obtaining said another network equipment and distribute the MPLS positioning label from a BGP message of carrying the MPLS positioning label that said another network equipment distributes; Perhaps; Comprise MPLS positioning label confirmation unit; Be used for a BGP message, confirm MPLS positioning label that the said network equipment need use, that reserve when said another network equipment sends datagram literary composition according to the information of carrying the MPLS positioning label of notifying the said network equipment to encapsulate reservation for its data message that sends to said another network equipment.
Preferably; The said network equipment also comprises MPLS positioning label encapsulation unit; Be used for sending to the said MPLS positioning label of label stack encapsulation of the data message of said another network equipment, identify the said position that carries the MPLS label of said traffic classification information at the said network equipment.
Preferably, the said network equipment also comprises data message receiving element and traffic classification tag-drop unit.
Said data message receiving element is used to receive the data message of said another network equipment MPLS label that send, that carry traffic classification information.
Said traffic classification tag-drop unit is with the said MPLS tag-drop that carries traffic classification information in the data message of the said MPLS label that carries traffic classification information.The said MPLS label that carries traffic classification information is to be used for the MPLS label data message that carries traffic classification information is carried out load balancing by the operator's equipment in the network, and the network equipment that receives the data message of the MPLS label that carries traffic classification information can not use the said MPLS label that carries traffic classification information to instruct message to transmit.
The said network equipment with the said MPLS tag-drop that carries traffic classification information after; The said MPLS label that carries traffic classification information just can be used in reference to the Leader literary composition by the said network equipment and transmit, thereby can not carry out wrong operation to the said data message that carries the MPLS label of traffic classification information.
Preferably; The said network equipment also comprises MPLS tag location unit; Be used for when data message that said another network equipment sends carries said MPLS positioning label, confirm the said position that carries the MPLS label of traffic classification information in the data message that said another network equipment sends according to said MPLS positioning label.
One embodiment of the present of invention are following.
A kind of multiprotocol label is transmitted (MPLS) network system, comprises first network equipment and second network equipment.Said first network equipment and second network equipment can communicate through a plurality of other network equipments.Preferably, said first and second network equipments are provider edge equipment (PE), and said other network equipments are operator's equipment (P).
Said first network equipment comprises: first Border Gateway Protocol (BGP) message sending unit, data message receiving element, traffic classification tag-drop unit.
Said second network equipment comprises: a BGP message sink unit, the first support information acquiring unit, the second support information maintenance unit, confirmation unit, transmitting element.
In said MPLS network system, a BGP message sending unit of said first network equipment is sent a BGP message of carrying first support information to said second network equipment.Wherein, said support information carries out the information of load balancing to said data message according to the MPLS label of the traffic classification information that carries of data message for support; Said first support information is load balancing is carried out in said first network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information.Preferably, also carry the MPLS positioning label that first network equipment distributes in the said BGP message; Perhaps; In a said BGP message, also comprise the information of notifying said second network equipment to encapsulate the MPLS positioning label of reserving for its data message that sends to said first network equipment; The MPLS positioning label of said reservation is safeguarded by the Internet digital distribution mechanism (IANA, InternetAssigned Numbers Authority).
The one BGP message sink unit of said second network equipment receives a said BGP message.The first support information acquiring unit of said second network equipment obtains said first support information from a said BGP message.
The second support information maintenance unit of said second network equipment is safeguarded second support information, and said second support information is load balancing is carried out in said second network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information.
Like this, said second network equipment can obtain said first support information and said second support information simultaneously.
Further, the affirmation unit of said second network equipment confirms according to said first support information and said second support information whether said first network equipment and second network equipment are all supported according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing.
The transmitting element of said second network equipment is used for after confirming that said first network equipment and second equipment support that all MPLS label according to the traffic classification information that carries of data message carries out load balancing to said data message, sending the data message that carries the MPLS label that carries traffic classification information to said first network equipment along said other network equipments.
Preferably; Said other equipment are receiving after said second network equipment mails to the data message of the said MPLS label of carrying of said first network equipment; Label stack based on said data message carries out load balancing to said data message, sends said data message to said first network equipment with the mode of load balancing.
Preferably; Said transmitting element carries out load balancing based on the label stack of said data message to said data message; Mode said other network equipments in network with load balancing send said data message, are continued with the mode of load balancing said message to be sent to said first network equipment by said other network equipments again.
The data message receiving element of said first network equipment receives said second network equipment carries data message from the MPLS label of traffic classification information to carrying of its transmission.
The stream label discarding unit of said first network equipment is used for the said MPLS tag-drop that data message that the data message receiving element with said first network equipment receives carries.
Preferably, said second network equipment also comprises MPLS positioning label acquiring unit or MPLS positioning label confirmation unit.
In the BGP message that said first network equipment sends, also carry the MPLS positioning label that first network equipment distributes; Perhaps; In a said BGP message, also comprise the information of notifying said second network equipment to encapsulate the MPLS positioning label of reserving for its data message that sends to said first network equipment; The MPLS positioning label of said reservation is safeguarded by the Internet digital distribution mechanism (IANA, Internet Assigned Numbers Authority).
Said MPLS positioning label acquiring unit is used for obtaining said another network equipment from a BGP message of the MPLS positioning label that carries said another network equipment distribution and distributes the MPLS positioning label.
Said MPLS positioning label confirmation unit is used for the BGP message according to the information of carrying the MPLS positioning label of notifying the said network equipment to encapsulate reservation for its data message that sends to said another network equipment, confirms MPLS positioning label that the said network equipment need use when said another network equipment sends datagram literary composition, that reserve.
Preferably, said second network equipment also comprises MPLS positioning label encapsulation unit.
Said MPLS positioning label encapsulation unit is that the data message that said second network equipment sends to said first network equipment encapsulates said MPLS positioning label, so that said first network equipment is confirmed the said position that carries the MPLS label of traffic classification information according to said MPLS positioning label.Like this; Said first network equipment is when receiving said second network equipment to the data message of its transmission; Just can confirm the said position that carries the MPLS label of said traffic classification information according to said MPLS positioning label; Thereby with the said MPLS tag-drop that carries said traffic classification information,, the said MPLS label that carries said traffic classification information instructs data forwarding so that being not used in by the traffic classification tag-drop unit of said first network equipment.
Preferably, said second network equipment also comprises data message receiving element and traffic classification tag-drop unit.
Said data message receiving element is used to receive the data message of said first network equipment MPLS label that send, that carry traffic classification information.
The MPLS tag-drop of the traffic classification information that carries of the data message of the MPLS label of the traffic classification information that carries that said traffic classification tag-drop unit is used for said second network equipment is received.
Preferably; Said second network equipment also comprises MPLS tag location unit; Be used for when data message that said first network equipment sends carries the MPLS positioning label, confirm the position of the MPLS label of the traffic classification information that carries in the data message that said first network equipment sends according to said MPLS positioning label.
Preferably; When a network equipment support is carried out load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message; The said network equipment can carry out traffic classification to the data message; And can in data message, identify the said MPLS label that carries traffic classification information, and confirm that the said MPLS label that carries traffic classification information is not used in reference to derivative according to message forwarding by said PE.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (14)
1. data message sending method; Be applied in the communication network; Said communication network comprises the first provider edge equipment PE and the second provider edge equipment PE; A said PE and said the 2nd PE are respectively two end points that multiprotocol label is transmitted the MPLS network edge, it is characterized in that said method comprises:
Said the 2nd PE receives the first Border Gateway Protocol (BGP) message that a said PE sends; A said BGP message is carried first support information; Wherein, Said support information carries out the information of load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message for supporting, said first support information is that a said PE supports the MPLS label according to the traffic classification information that carries of data message said data message to be carried out the information of load balancing;
Said the 2nd PE safeguards has second support information, and wherein, said second support information is load balancing is carried out in said the 2nd PE support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
Said the 2nd PE confirms according to said first support information and said second support information whether a said PE and the 2nd PE all support according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing;
If then said the 2nd PE sends the data message that carries said MPLS label to a said PE.
2. method according to claim 1 is characterized in that,
Also comprise the MPLS positioning label that distributes by a said PE in the said BGP message;
Perhaps,
Also comprise the information of notifying said the 2nd PE to encapsulate the MPLS positioning label of reserving for its data message that sends to a said PE in the said BGP message.
3. method according to claim 2 is characterized in that,
Said the 2nd PE sends to the said MPLS positioning label of encapsulation in the label stack of data message of a said PE at it, identifies the said position that carries the MPLS label of said traffic classification information.
4. method according to claim 1 is characterized in that, the granularity of said support information comprises:
Every advertising of route, every ingress router-egress router incidence relation announcement, the announcement of every VPN instance, the every address family/AFI/SAFI of subaddressing family announcement or every PE announcement.
5. according to claim 1,2,3 or 4 described methods, it is characterized in that,
A said BGP message is the bgp update message of I ETF standard RFC4271 definition or use, and said bgp update message is carried said first support information through a new BGP extended community attribute;
Or,
A said BGP message is bgp update message, and said bgp update message is carried said first support information through a new BGP routing property;
Or,
A said BGP message is opened OPEN message for the BGP of ietf standard RFC4271 definition or use.
6. method according to claim 1 is characterized in that,
Said the 2nd PE sends said second support information to a said PE;
A said PE confirms according to said first support information of self maintained and said second support information that receives whether a said PE and said the 2nd PE all support according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing;
If a then said PE sends the data message that carries said MPLS label to said the 2nd PE.
7. according to claim 1,2,3,4 or 6 described methods, it is characterized in that,
Said the 2nd PE receives the data message that a said PE sends;
After the data message of confirming said PE transmission comprises the data message of the MPLS label that carries traffic classification information, with the said MPLS tag-drop that carries traffic classification information.
8. method according to claim 7 is characterized in that,
When carrying said MPLS positioning label in the data message that a said PE sends, said the 2nd PE confirms the position of the MPLS label of the traffic classification information that carries in the data message that a said PE sends according to said MPLS positioning label.
9. a network equipment is characterized in that, comprising:
The first Border Gateway Protocol (BGP) message sink unit; Be used to receive the BGP message of carrying first support information that another network equipment sends; Wherein, Said support information carries out the information of load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message for supporting, said first support information is load balancing is carried out in said another network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
The first support information acquiring unit is used for obtaining said first support information from a said BGP message;
The second support information maintenance unit is used to safeguard second support information, and said second support information is load balancing is carried out in the said network equipment self support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
Confirmation unit is used for confirming according to said first support information and said second support information whether a said PE and the 2nd PE all support according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing;
Transmitting element; Be used for after confirming that the said network equipment and said another network equipment support that all MPLS label according to the traffic classification information that carries of data message carries out load balancing to said data message, sending the data message that carries said MPLS label to said another network equipment.
10. the network equipment according to claim 9 is characterized in that, the said network equipment also comprises:
MPLS positioning label acquiring unit is used for obtaining said another network equipment from a BGP message of carrying the MPLS positioning label that said another network equipment distributes and distributes the MPLS positioning label;
Or,
MPLS positioning label confirmation unit; Be used for a BGP message, confirm MPLS positioning label that the said network equipment need use, that reserve when said another network equipment sends datagram literary composition according to the information of carrying the MPLS positioning label of notifying the said network equipment to encapsulate reservation for its data message that sends to said another network equipment.
11. the network equipment according to claim 9 is characterized in that, the said network equipment also comprises:
MPLS positioning label encapsulation unit is used for sending at the said network equipment the said MPLS positioning label of label stack encapsulation of the data message of said another network equipment, identifies the said position that carries the MPLS label of said traffic classification information.
12., it is characterized in that the said network equipment also comprises according to claim 9, the 10 or 11 described network equipments:
The data message receiving element is used to receive the data message of said another network equipment MPLS label that send, that carry traffic classification information.
Traffic classification tag-drop unit is used for the said MPLS tag-drop that carries traffic classification information with the data message of the said MPLS label that carries traffic classification information.
13. the network equipment according to claim 11 is characterized in that, the said network equipment also comprises:
MPLS tag location unit; Be used for when data message that said another network equipment sends carries said MPLS positioning label, confirm the said position that carries the MPLS label of traffic classification information in the data message that said another network equipment sends according to said MPLS positioning label.
14. a network system is characterized in that, comprises first network equipment and second network equipment;
Said first network equipment comprises:
The first Border Gateway Protocol (BGP) message sending unit; Be used for sending a BGP message of carrying first support information to said second network equipment; Wherein, Said support information carries out the information of load balancing according to the MPLS label of the traffic classification information that carries of data message to said data message for supporting, said first support information is load balancing is carried out in said first network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
The data message receiving element is used to receive the said data message that carry said MPLS label of said second network equipment to its transmission;
Traffic classification tag-drop unit is used for the MPLS tag-drop that carries said traffic classification information with said;
Said second network equipment comprises:
The one BGP message sink unit is used to receive a said BGP message;
The first support information acquiring unit is used for obtaining said first support information from a said BGP message;
The second support information maintenance unit is used to safeguard second support information, and said second support information is load balancing is carried out in said second network equipment support to said data message according to the MPLS label of the traffic classification information that carries of data message a information;
Confirmation unit confirms according to said first support information and said second support information whether said first network equipment and second network equipment are all supported according to the MPLS label of the traffic classification information that carries of data message said data message to be carried out load balancing;
Transmitting element; Be used for after confirming that said first network equipment and second network equipment support that all MPLS label according to the traffic classification information that carries of data message carries out load balancing to said data message, sending the data message that carries said MPLS label to said first network equipment.
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| CN102624601B (en) | 2014-12-03 |
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