CN102082736A - Method and device for realizing unbalanced load sharing - Google Patents
Method and device for realizing unbalanced load sharing Download PDFInfo
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- CN102082736A CN102082736A CN2011100546676A CN201110054667A CN102082736A CN 102082736 A CN102082736 A CN 102082736A CN 2011100546676 A CN2011100546676 A CN 2011100546676A CN 201110054667 A CN201110054667 A CN 201110054667A CN 102082736 A CN102082736 A CN 102082736A
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Abstract
The invention discloses a method and device for realizing unbalanced load sharing, which is realized by transferring the functions of multiple common tunnel entrances corresponding to the same destination address to a tunnel converging entrance with the same destination address, thus the common tunnel entrances only execute the transmitting function, so that firstly, equivalence on a route term does not need to be carried out on the multiple tunnel entrances and then unbalanced load sharing is carried out aiming at each tunnel entrance after the equivalence, but unbalanced load sharing needs to be carried out only on the tunnel converging entrance; secondly, no matter how many routes are transmitted through the tunnel converging entrance corresponding to the destination address, the load sharing ratio of the tunnel converging entrance is unchangeable; thirdly, the tunnel entrances do not need to allocate the IP (Internet Protocol) address or enable an IGP (Interior Gateway Protocol), thereby greatly saving IP address resources and IGP resources; and fourthly, only the load sharing ratio of the tunnel converging entrance needs to be maintained, but the load sharing ratio does not need to be maintained aiming at each route.
Description
Technical field
The present invention relates to the load balancing technology, particularly realize the method and the device of lack of balance load balancing.
Background technology
Tunnel transmission is a kind of data transmission manner, uses tunnel protocol that the Frame or the packet of other agreements are encapsulated again, send by the tunnel then.Can set up many tunnels between two network equipments, to realize the load balancing of transfer of data, when many tunnels of setting up have different bandwidth reserveds, just produced the requirement of lack of balance load balancing, below with traffic engineering (TE, Traffic Engineering) tunnel is an example, sketches the application of this lack of balance load balancing.
Traffic engineering tunnel is as the major technique of TE, be widely used in general internet agreement (IP, InternetProtocol) forwarding, Layer 2 virtual private network (L2VPN, Layer 2 Virtual Private Network), during Layer3 Virtual Private Network (L3VPN, Layer 3 Virtual Private Network) and IPv6 over IPv4 etc. use.Fig. 1 sets up the schematic diagram of two traffic engineering tunnels for two LA Management Rooms in the prior art.LSR1 is by SPF (OSPF, Open Shortest Path First) Routing Protocol is learnt the IPv4 route 20.0.0.0/8 of LSR6, set up two traffic engineering tunnels to LSR6 from LSR1, comprise that bandwidth reserved is the tunnel 1 (Tunnel1) of 40M and the tunnel 2 (Tunnel2) that bandwidth reserved is 100M, superposed arrow is represented Tunnel1 among Fig. 1, and the arrow that is positioned at the bottom is represented Tunnel2.Every tunnel corresponding tunnel logic interface on LSR1 abbreviates the tunnel face as.Also need dispose Interior Gateway Protocol at LSR1 and transmit shortcut (IGP ShortCut) function, promptly on LSR1, enable tunnel transmission.
As shown in Figure 1, LSR1 with the tunnel face of Tunnel1 and Tunnel2 present route aspect equivalence, makes their outgoing interfaces as forward-path of equal value to the route of LSR6, and acquiescence is carried out load balancing according to 1: 1 relation.But because the bandwidth reserved of Tunnel1 and Tunnel2 is inequality, obviously be irrational, at this moment just need carry out the lack of balance load balancing so carry out load balancing according to above-mentioned default situations.The implementation method of unsupported equilibrium in the prior art, it is the load balancing coefficient in every tunnel of configuration on LSR1, the load balancing coefficient that for example disposes Tunnel1 is 1, the load balancing coefficient of configuration Tunnel2 is 2, then Tunnel1 and Tunnel2 bear 1/3 and 2/3 flow respectively, similarly, if the load balancing coefficient of configuration is configured to 1 and 3 respectively, then Tunnel1 and Tunnel2 bear 1/4 and 3/4 flow respectively.
There is following defective in the method for above-mentioned realization tunnel transmission lack of balance load balancing:
1, each tunnel is carried out the precondition of lack of balance load balancing, be the outgoing interface of the tunnel face in each tunnel as the forward-path of equal value of certain route, if other tunnels so just can't be adjusted to the partial discharge on this tunnel as the unique forward-path of this route in the preferential selection of a Routing Protocol tunnel wherein.
If 2, the tunnel head end of LSR1 enables IGP ShortCut function shown in Fig. 1, then the tunnel face in each tunnel all want configuration of IP address and and enable IGP, the tunnel face will take a large amount of IP address resources like this, also increase the amount of calculation of IGP.
3, all need safeguard the load balancing coefficient at each route, as shown in Figure 2, wherein the Tunnel in the square frame represents the tunnel, the numeral load balancing coefficient in the bracket, fraction representation load balancing ratio.Suppose to exist two route 20.0.0.0/8 and 30.0.0.0/8, route 20.0.0.0/8 has two tunnel Tunnel1 and Tunnel2 as forward-path of equal value, then need to safeguard the load balancing coefficient 1 of Tunnel1 of this route and the load balancing coefficient 2 of Tunnel2, also to safeguard the state of Tunnel1 and Tunnel2, route 30.0.0.0/8 has three tunnels as forward-path of equal value, then need to safeguard the load balancing coefficient 1 of Tunnel1, the load balancing coefficient 2 of Tunnel2 and the load balancing coefficient 3 of Tunnel3, also to safeguard Tunnel1, the state of Tunnel2 and Tunnel3, shown in Fig. 2 is a kind of simple situation, for the scene that has a large amount of routes, realization is very difficult.
4, the load balancing of each route relation, all need to determine according to the forward-path of equal value of this route and as the load balancing coefficient in each tunnel of forward-path of equal value, it still is example with Fig. 2, route 20.0.0.0/8 uses Tunnel1 and Tunnel2 as forward-path of equal value, 1/3 and 2/3 flow is shared in these two tunnels respectively so, route 30.0.0.0/8 uses Tunnel1, Tunnel2 and Tunnel3 as forward-path of equal value, and 1/6,2/6 and 3/6 flow is shared in these three tunnels respectively so.
Summary of the invention
The invention provides a kind of method that realizes the lack of balance load balancing, use this method can overcome the various defectives of existing techniques in realizing lack of balance load balancing.
The invention provides a kind of device of realizing the lack of balance load balancing, this device can overcome the various defectives of existing techniques in realizing lack of balance load balancing.
Technical scheme of the present invention is achieved in that
A kind of method that realizes the lack of balance load balancing, key be, the tunnel face of the same destination address of correspondence added in the tunnel aggregation port of corresponding identical destination address, as the tunnel member port of this tunnel aggregation port; Dispose the load balancing ratio of each tunnel member port in each tunnel aggregation port; This method also comprises:
Determine to receive the pairing tunnel of the destination address aggregation port of flow;
According to the load balancing ratio of each tunnel member port in the tunnel aggregation port of determining, transmit to each tunnel member port of the tunnel aggregation port of determining receiving assignment of traffic.
A kind of device of realizing the lack of balance load balancing, key are that this device comprises: add module and assignment of traffic module;
Described adding module is used for the tunnel face of the same destination address of correspondence is added the tunnel aggregation port of corresponding identical destination address, as the tunnel member port of this tunnel aggregation port; Dispose the load balancing ratio of each tunnel member port in each tunnel aggregation port;
Described assignment of traffic module is used for the execution result according to described adding module, determines to receive the pairing tunnel of the destination address aggregation port of flow; According to the load balancing ratio of each tunnel member port in the tunnel aggregation port of determining, transmit to each tunnel member port of the tunnel aggregation port of determining receiving assignment of traffic.
Realize the method and the device of lack of balance load balancing among the present invention, be the function of a plurality of ordinary crossing mouths of corresponding same destination address in the prior art to be transferred on the tunnel aggregation port with identical destination address realize, make these ordinary crossing mouths only carry out forwarding capability and get final product, obtained technique effect comprises:
1, need not the equivalence of the advanced walking along the street in a plurality of tunnel faces, and then carry out the lack of balance load balancing, and only need to carry out the lack of balance load balancing at the tunnel aggregation port at each tunnel face after the equivalence by aspect;
2, because forwarding capability is only carried out as the tunnel member port in each tunnel face,, IP address resource and IGP protocol resource have been saved greatly so these tunnel faces all need not configuration of IP address or enable IGP;
3, only need to safeguard the load balancing ratio, and need not all safeguard the load balancing ratio at each route at the tunnel aggregation port.
As long as 4 have identical destination address, then no matter how many routes are transmitted through the tunnel aggregation port of this destination address correspondence, and the load balancing ratio of tunnel aggregation port all is constant.
Description of drawings
Fig. 1 sets up the schematic diagram of two traffic engineering tunnels for two LA Management Rooms in the prior art;
Fig. 2 is the schematic diagram of routing table in the prior art;
Fig. 3 is the implementation method flow chart of lack of balance load balancing among the present invention;
Fig. 4 is the schematic diagram of routing table in the embodiment of the invention;
Fig. 5 is for realizing the structural representation of the device of lack of balance load balancing among the present invention.
Embodiment
For making objects and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and Examples.
In the present invention, in advance the tunnel face of the same destination address of correspondence is added the tunnel aggregation port of corresponding identical destination address,, and dispose the load balancing ratio of each tunnel member port in each tunnel aggregation port as the tunnel member port of this tunnel aggregation port.
Tunnel aggregation port among the present invention is the network layer logic interface, all functions with ordinary crossing mouth in the prior art, for example can configuration of IP address, enable IGP, configuration multiprotocol label switching (MPLS, Multi-Protocol Label Switch) and Routing Protocol etc., also can participate in the VPN characteristic and select the public network tunnel, and each tunnel member port that adds the tunnel aggregation port will only need not to have above-mentioned functions, only need to carry out forwarding capability.
Fig. 3 is for realizing the method flow diagram of lack of balance load balancing among the present invention, this flow process comprises:
Step 301: the pairing tunnel of the destination address aggregation port of determining to receive flow.
Step 302:, transmit to each tunnel member port of the tunnel aggregation port of determining with receiving assignment of traffic according to the load balancing ratio of each tunnel member port in the tunnel aggregation port of determining.
As seen, the method of lack of balance load balancing among the present invention, the function of a plurality of ordinary crossing mouths of corresponding same destination address in the prior art transferred on the tunnel aggregation port with identical destination address realize, make these ordinary crossing mouths only carry out forwarding capability and get final product, obtained technique effect comprises:
1, need not the equivalence of the advanced walking along the street in a plurality of tunnel faces, and then carry out the lack of balance load balancing, and only need to carry out the lack of balance load balancing at the tunnel aggregation port at each tunnel face after the equivalence by aspect;
2, because forwarding capability is only carried out as the tunnel member port in each tunnel face,, IP address resource and IGP protocol resource have been saved greatly so these tunnel faces all need not configuration of IP address or enable IGP;
3, only need to safeguard the load balancing ratio, and need not all safeguard the load balancing ratio at each route at the tunnel aggregation port.
As long as 4 have identical destination address, then no matter how many routes are transmitted through the tunnel aggregation port of this destination address correspondence, and the load balancing ratio of tunnel aggregation port all is constant.
Provide the embodiment of the implementation method of lack of balance load balancing of the present invention below.
The application scenarios of present embodiment is as follows: the corresponding tunnel aggregation port of destination address, each tunnel aggregation port and tunnel face all have the next hop label forwarding entry (NHLFE of oneself, Next HopLabel Forwarding Entry) list item, each NHLFE list item configuration one has unique token value, and this token value is as the sign of this NHLFE list item; All record forwarding information in the NHLFE list item of each tunnel face, for example tunnel face corresponding physical interface etc.; Tunnel type is a traffic engineering tunnel.
In the present embodiment, the method of using static configuration adds the tunnel aggregation port of corresponding identical destination address with the tunnel face of the same destination address of correspondence, specifically is that token value record with the tunnel face of the same destination address of correspondence is in the NHLFE list item of the tunnel aggregation port of the identical destination address of correspondence.
In the present embodiment, for each tunnel member port configuration load of each tunnel aggregation port is shared coefficient, and the load balancing coefficient of each tunnel member port recorded in its corresponding NHLFE list item, realize the load balancing ratio of each tunnel member port in each tunnel aggregation port of configuration thus.
Fig. 4 is the schematic diagram of routing table in the embodiment of the invention, the token value is respectively three tunnel faces of 10,20 and 30, and to add the token values be 100 tunnel aggregation port, tunnel member port as this tunnel aggregation port, the tunnel of these three tunnel member port correspondences is expressed as Tunnel1, Tunnel2 and Tunnel3 in Fig. 4, the load balancing coefficient of these three tunnel member ports is configured to 1,2 and 3 respectively, and promptly the load balancing ratio of these three tunnel member ports is respectively 1/6,2/6 and 3/6.Route 20.0.0.0/8 or route 30/0/0/0/8 are 100 tunnel aggregation port forwarding through the token value, it is 10 tunnel member port transmission to the token value that 1/6 assignment of traffic will be arranged, 2/6 assignment of traffic is the member port transmission of 20 tunnel to the token value, and 3/6 assignment of traffic is that 30 tunnel member port transmits to the token value.
Except that the situation that present embodiment is enumerated, in actual applications, can also at a destination address two above tunnel aggregation ports be set according to application need.In this case, need earlier according to setting rule, select the tunnel aggregation port of an identical destination address of correspondence for the tunnel face of the same destination address of correspondence, and then with the sign of the NHLFE list item of the tunnel face of the same destination address of correspondence, be recorded in the NHLFE list item of the tunnel aggregation port of selecting, realize tunnel aggregation port that the tunnel face with the same destination address of correspondence brings Selection In out, as the tunnel member port of this tunnel aggregation port.The setting rule here has numerous embodiments, for example is that the identical tunnel aggregation port of class of service is selected in the tunnel face of corresponding same destination address, perhaps is the tunnel aggregation port of selector interflow, the tunnel face amount requirement for restriction of corresponding same destination address.Cite a plain example, suppose to have two kinds of business of voice and video at destination address 1, tunnel aggregation port 1 and tunnel aggregation port 2 at destination address 1 can be set, tunnel face with corresponding destination address 1 and transmitting voice service data adds tunnel aggregation port 1 then, with adding tunnel, the tunnel face aggregation port 2 of corresponding destination address 2 and transmission of video business datum.
The foregoing description is example with the traffic engineering tunnel, tunnel for other types, generic route encapsulation (GRE for example, Generic Routing Encapsulation) tunnel, also can use the method that realizes the lack of balance load balancing among the present invention, as long as it is identical with the destination address of tunnel aggregation port to satisfy the destination address of tunnel face.
Fig. 5 is for realizing the structural representation of the device of lack of balance load balancing among the present invention, this device comprises: add module and assignment of traffic module.
Above-mentioned adding module is used for the tunnel face of the same destination address of correspondence is added the tunnel aggregation port of corresponding identical destination address, as the tunnel member port of this tunnel aggregation port; Dispose the load balancing ratio of each tunnel member port in each tunnel aggregation port.
Above-mentioned assignment of traffic module is used for the execution result according to described adding module, determines to receive the pairing tunnel of the destination address aggregation port of flow; According to the load balancing ratio of each tunnel member port in the tunnel aggregation port of determining, transmit to each tunnel member port of the tunnel aggregation port of determining receiving assignment of traffic.
As seen, the device of lack of balance load balancing among the present invention, the function of a plurality of ordinary crossing mouths of corresponding same destination address in this device transferred on the tunnel aggregation port that has identical destination address in this device realize, make these ordinary crossing mouths only carry out forwarding capability and get final product, obtained technique effect comprises:
1, need not the equivalence of the advanced walking along the street in a plurality of tunnel faces, and then carry out the lack of balance load balancing, and only need to carry out the lack of balance load balancing at the tunnel aggregation port at each tunnel face after the equivalence by aspect;
2, because each ordinary crossing mouth only need be carried out forwarding capability,, IP address resource and IGP resource have been saved greatly so these ordinary crossing mouths all need not configuration of IP address or enable IGP;
3, only need to safeguard the load balancing ratio, and need not all safeguard the load balancing ratio at each route at the tunnel aggregation port;
As long as 4 have identical destination address, then no matter how many routes are transmitted through the tunnel aggregation port of this destination address correspondence, and the load balancing ratio of tunnel aggregation port all is constant.
Tunnel aggregation port among the present invention is for supporting the network layer logic interface of static configuration.
Provide the embodiment of the implement device of lack of balance load balancing of the present invention below.
The application scenarios of present embodiment is as follows: each tunnel aggregation port and tunnel face all have the NHLFE list item of oneself, and each NHLFE list item configuration one has unique token value, and this token value is as the sign of this NHLFE list item; All record forwarding information in the NHLFE list item of each tunnel face, for example tunnel face corresponding physical interface etc.
In the present embodiment, the adding module in the device comprises: add performance element, dispensing unit and memory cell.
Above-mentioned adding performance element is used for the tunnel face of the same destination address of correspondence is added the tunnel aggregation port of corresponding identical destination address, as the tunnel member port of this tunnel aggregation port.
Above-mentioned dispensing unit is used for disposing the load balancing ratio of each each tunnel member port of tunnel aggregation port.
Said memory cells is used to store the execution result that adds performance element and described dispensing unit.
Based on the application scenarios of present embodiment, above-mentioned adding performance element comprises again: first configuration adds carries out the subelement and the first record subelement.
Above-mentioned first configuration adds carries out subelement, be used for when the corresponding tunnel aggregation port of destination address, directly dispose the corresponding relation between the NHLFE list item of NHLFE list item and the tunnel aggregation port of corresponding identical destination address of tunnel face of corresponding same destination address; When two above tunnels of destination address correspondence aggregation port, according to setting the tunnel aggregation port that rule be the identical destination address of correspondence of tunnel face selection of corresponding same destination address, dispose the corresponding relation of the NHLFE list item of the NHLFE list item of tunnel face of corresponding same destination address and the tunnel aggregation port selected.
The above-mentioned first record subelement, be used for carrying out the configuration result of subelement according to first configuration, with the sign of the NHLFE list item of the tunnel face of the same destination address of correspondence, be recorded in the NHLFE list item of tunnel aggregation port of corresponding identical destination address the content in the updated stored unit.
Based on the application scenarios of present embodiment, above-mentioned dispensing unit comprises: the subelement and the second record subelement are carried out in second configuration.
Subelement is carried out in above-mentioned second configuration, is used for disposing the load balancing coefficient of each tunnel member port in each tunnel aggregation port according to the execution result that adds performance element.
The above-mentioned second record subelement is used for the configuration result according to the second configuration execution subelement, with the load balancing coefficient of each tunnel member port in each tunnel aggregation port, is recorded in the NHLFE list item of this tunnel member port the content in the updated stored unit.
Device among the present invention can be according to the method flow executable operations among the present invention.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a method that realizes the lack of balance load balancing is characterized in that, the tunnel face of the same destination address of correspondence is added in the tunnel aggregation port of corresponding identical destination address, as the tunnel member port of this tunnel aggregation port; Dispose the load balancing ratio of each tunnel member port in each tunnel aggregation port; This method also comprises:
Determine to receive the pairing tunnel of the destination address aggregation port of flow;
According to the load balancing ratio of each tunnel member port in the tunnel aggregation port of determining, transmit to each tunnel member port of the tunnel aggregation port of determining receiving assignment of traffic.
2. the method for claim 1 is characterized in that, described tunnel aggregation port and described tunnel face have next strip label respectively and transmit inlet NHLFE list item, and each NHLFE list item disposes unique sign.
3. method as claimed in claim 2 is characterized in that, described tunnel face with the same destination address of correspondence adds in the tunnel aggregation port with identical destination address and is:
When the corresponding tunnel aggregation port of destination address,, be recorded in the NHLFE list item of tunnel aggregation port of corresponding identical destination address directly with the sign of the NHLFE list item of the tunnel face of the same destination address of correspondence;
When two above tunnels of destination address correspondence aggregation port,, select the tunnel aggregation port of an identical destination address of correspondence for the tunnel face of the same destination address of correspondence according to setting rule; Sign with the NHLFE list item of the tunnel face of the same destination address of correspondence is recorded in the NHLFE list item of the tunnel aggregation port of selecting.
4. method as claimed in claim 3 is characterized in that, described setting rule comprises: for selecting the identical tunnel aggregation port of class of service in the tunnel face of the same destination address of correspondence; Perhaps, measure the tunnel aggregation port that requires for the selector interflow, tunnel face of the same destination address of correspondence.
5. method as claimed in claim 2 is characterized in that, the load balancing ratio of each tunnel member port comprises in each tunnel aggregation port of described configuration:
For each tunnel member port configuration load of each tunnel aggregation port is shared coefficient;
The load balancing coefficient of each tunnel member port is recorded in its corresponding NHLFE list item.
6. a device of realizing the lack of balance load balancing is characterized in that, this device comprises: add module and assignment of traffic module;
Described adding module is used for the tunnel face of the same destination address of correspondence is added the tunnel aggregation port of corresponding identical destination address, as the tunnel member port of this tunnel aggregation port; Dispose the load balancing ratio of each tunnel member port in each tunnel aggregation port;
Described assignment of traffic module is used for the execution result according to described adding module, determines to receive the pairing tunnel of the destination address aggregation port of flow; According to the load balancing ratio of each tunnel member port in the tunnel aggregation port of determining, transmit to each tunnel member port of the tunnel aggregation port of determining receiving assignment of traffic.
7. device as claimed in claim 6 is characterized in that, described adding module comprises: add performance element, dispensing unit and memory cell;
Described adding performance element is used for the tunnel face of the same destination address of correspondence is added the tunnel aggregation port of corresponding identical destination address, as the tunnel member port of this tunnel aggregation port;
Described dispensing unit is used for disposing the load balancing ratio of each each tunnel member port of tunnel aggregation port;
Described memory cell is used to store the execution result of described adding performance element and described dispensing unit.
8. device as claimed in claim 7 is characterized in that, described tunnel aggregation port and described tunnel face have next hop label forwarding entry NHLFE list item respectively, and each NHLFE list item disposes unique sign;
Described adding performance element comprises: the subelement and the first record subelement are carried out in first configuration;
Subelement is carried out in described first configuration, be used for when the corresponding tunnel aggregation port of destination address, directly dispose the corresponding relation between the NHLFE list item of NHLFE list item and the tunnel aggregation port of corresponding identical destination address of tunnel face of corresponding same destination address; When two above tunnels of destination address correspondence aggregation port, according to setting the tunnel aggregation port that rule be the identical destination address of correspondence of tunnel face selection of corresponding same destination address, dispose the corresponding relation of the NHLFE list item of the NHLFE list item of tunnel face of corresponding same destination address and the tunnel aggregation port selected;
The described first record subelement, be used for carrying out the configuration result of subelement according to first configuration, with the sign of the NHLFE list item of the tunnel face of the same destination address of correspondence, be recorded in the NHLFE list item of tunnel aggregation port of corresponding identical destination address, upgrade the content in the described memory cell.
9. device as claimed in claim 7 is characterized in that, described tunnel aggregation port and described tunnel face have the NHLFE list item respectively, and each NHLFE list item disposes unique sign;
Described dispensing unit comprises: the subelement and the second record subelement are carried out in second configuration;
Subelement is carried out in described second configuration, is used for the execution result according to described adding performance element, disposes the load balancing coefficient of each tunnel member port in each tunnel aggregation port;
The described second record subelement, be used for carrying out the configuration result of subelement according to second configuration, load balancing coefficient with each tunnel member port in each tunnel aggregation port is recorded in the NHLFE list item of this tunnel member port, upgrades the content in the described memory cell.
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| CN103414651A (en) * | 2013-08-02 | 2013-11-27 | 杭州华三通信技术有限公司 | Method and network device for adjusting equal-cost route balanced sharing |
| CN111478808A (en) * | 2020-04-02 | 2020-07-31 | 清华大学 | Method, system, electronic device and storage medium for assisting configuration update verification |
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Application publication date: 20110601 |