CN107104905B - Parallel flow control method and device - Google Patents
Parallel flow control method and device Download PDFInfo
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- CN107104905B CN107104905B CN201710484005.XA CN201710484005A CN107104905B CN 107104905 B CN107104905 B CN 107104905B CN 201710484005 A CN201710484005 A CN 201710484005A CN 107104905 B CN107104905 B CN 107104905B
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- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/20—Traffic policing
Abstract
The invention discloses a parallel flow control method and a device, wherein the method comprises the following steps: after receiving a message, determining the number of flow control strategy sets corresponding to the port, wherein the sum of the bandwidths of at least one channel included in each flow control strategy set is the bandwidth of the port; if the number of the flow control strategy sets corresponding to the ports is more than or equal to 2, determining a selected channel corresponding to the message in each flow control strategy set; determining whether each of the selected channels allows the message to be sent; and if each selected channel allows to send the message, sending the message. The scheme can realize the flow control aiming at a plurality of flow control strategy sets.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a parallel flow control method and apparatus.
Background
With the popularization of large-traffic network protocols such as Peer-to-Peer (Peer-to-Peer, P2P) and online video, the bandwidth of the local area network outlet is easily exhausted by applications with large traffic, such as P2P downloading and online video. Because the outlet bandwidth cannot be expanded without cost, the traffic of downloading P2P, online video and the like must be limited to ensure that the applications with smaller traffic, such as Web browsing, network games and the like, can be normally used. Therefore, the flow control of the local area network outlet becomes the basic function of the outlet gateway device.
In the current flow control method, a channel and token model is adopted, each channel is periodically given with different numbers of tokens, and the channel with enough tokens can send messages. In such a model, a flow control policy set including channels and matching rules needs to be defined in advance according to requirements. For example: the exit bandwidth is 20M, and a certain college network manager defines a flow control strategy set according to the application type, wherein the included channels and the matching rules of the channels are as follows: the bandwidth of the channel A is 10M, and the matching rule is an online game message; the bandwidth of the channel B is 7M, and the matching rule is a Web browsing message; the bandwidth of the channel C is 3M, and the matching rule is P2P download message. After receiving the message, the network equipment determines a corresponding channel according to the application type of the message; each channel will receive a fixed number of tokens periodically; when the channel corresponding to the application type of the message holds enough tokens, the message can be sent, and when the channel corresponding to the application type of the message does not hold enough tokens, the sending of the message is stopped.
In the above flow control method, flow control can be performed only for one flow control policy set, and flow control cannot be performed for a plurality of flow control policy sets.
Disclosure of Invention
The embodiment of the invention provides a parallel flow control method and a parallel flow control device, which are used for solving the problems that the flow control can be realized only by aiming at one flow control strategy set and the flow control can not be realized by aiming at a plurality of flow control strategy sets in the existing flow control method.
According to an embodiment of the present invention, a parallel flow control method is provided, which is applied to a port of a network device, and includes:
after receiving a message, determining the number of flow control strategy sets corresponding to the port, wherein the sum of the bandwidths of at least one channel included in each flow control strategy set is the bandwidth of the port;
if the number of the flow control strategy sets corresponding to the ports is more than or equal to 2, determining a selected channel corresponding to the message in each flow control strategy set;
determining whether each of the selected channels allows the message to be sent;
and if each selected channel allows to send the message, sending the message.
Specifically, determining the number of the flow control policy sets corresponding to the ports specifically includes:
acquiring a first corresponding relation between a port and a flow control strategy set;
searching a flow control strategy set corresponding to the port in the first corresponding relation;
and counting the number of the flow control strategy sets corresponding to the ports.
Specifically, determining the selected channel corresponding to the packet in each flow control policy set specifically includes:
for each of the sets of flow control policies, performing:
acquiring a second corresponding relation between a matching rule and a channel included in the current flow control strategy set;
determining a matching rule which is satisfied by the message in the current flow control strategy set;
and searching a channel corresponding to the matching rule which is met by the message in the current flow control strategy set in the second corresponding relation to obtain a selected channel corresponding to the message in the current flow control strategy set.
Specifically, determining whether each selected channel allows sending the packet includes:
for each of the selected channels, performing:
determining whether the size of the residual token of the current selected channel is larger than or equal to the size of the message;
if the size of the residual token of the current selected channel is larger than or equal to that of the message, adding a sending permission identifier in the message; and if the size of the residual token of the current selected channel is smaller than that of the message, adding a forwarding prohibition identifier into the message.
Optionally, the method further includes:
and if at least one selected channel does not allow the message to be sent, discarding the message.
The embodiment of the present invention further provides a parallel flow control device, applied to a port of a network device, including:
a first determining module, configured to determine, after receiving a packet, the number of flow control policy sets corresponding to the port, where a sum of bandwidths of at least one channel included in each of the flow control policy sets is a bandwidth of the port;
a second determining module, configured to determine, if the number of the flow control policy sets corresponding to the port is greater than or equal to 2, a selected channel corresponding to the packet in each of the flow control policy sets;
a third determining module, configured to determine whether each selected channel allows sending the packet;
and the sending module is used for sending the message if each selected channel allows the message to be sent.
Specifically, the first determining module is specifically configured to:
acquiring a first corresponding relation between a port and a flow control strategy set;
searching a flow control strategy set corresponding to the port in the first corresponding relation;
and counting the number of the flow control strategy sets corresponding to the ports.
Specifically, the second determining module is specifically configured to:
for each of the sets of flow control policies, performing:
acquiring a second corresponding relation between a matching rule and a channel included in the current flow control strategy set;
determining a matching rule which is satisfied by the message in the current flow control strategy set;
and searching a channel corresponding to the matching rule which is met by the message in the current flow control strategy set in the second corresponding relation to obtain a selected channel corresponding to the message in the current flow control strategy set.
Specifically, the third determining module is specifically configured to:
for each of the selected channels, performing:
determining whether the size of the residual token of the current selected channel is larger than or equal to the size of the message;
if the size of the residual token of the current selected channel is larger than or equal to that of the message, adding a sending permission identifier in the message; and if the size of the residual token of the current selected channel is smaller than that of the message, adding a forwarding prohibition identifier into the message.
Optionally, the system further comprises a discarding module, configured to:
and if at least one selected channel does not allow the message to be sent, discarding the message.
The invention has the following beneficial effects:
the embodiment of the invention provides a parallel flow control method and a device, after a message is received, the number of flow control strategy sets corresponding to a port is determined, and the sum of the bandwidths of at least one channel included in each flow control strategy set is the bandwidth of the port; if the number of the flow control strategy sets corresponding to the ports is more than or equal to 2, determining a selected channel corresponding to the message in each flow control strategy set; determining whether each of the selected channels allows the message to be sent; and if each selected channel allows to send the message, sending the message. In the scheme, when the number of the flow control strategy sets corresponding to the ports of the network device is greater than or equal to 2, the selected channel corresponding to the message in each flow control strategy set can be determined, and the message is sent only if each selected channel allows sending the message, so that flow control is performed for a plurality of flow control strategy sets.
Drawings
Fig. 1 is a flowchart of a parallel flow control method according to an embodiment of the present invention;
FIG. 2 is a flowchart of S11 in an embodiment of the present invention;
FIG. 3 is a flowchart of S12 in an embodiment of the present invention;
FIG. 4 is a flowchart of S13 in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a parallel flow control device according to an embodiment of the present invention.
Detailed Description
The embodiment of the present invention provides a parallel flow control method, which is applied to a port of a network device, and if the network device includes multiple ports, each port may apply the method, so as to solve the problem that the existing flow control method can only implement flow control for one flow control policy set, but cannot implement flow control for multiple flow control policy sets. The flow of the method is shown in fig. 1, and the execution steps are as follows:
s11: and after receiving the message, determining the number of the flow control strategy sets corresponding to the ports.
When forwarding a message, a network device usually receives the message through a port of the network device and then sends the message through the port of the network device. When a message needs to be sent out through a port of a network device, the parallel flow control method in the embodiment of the invention can be adopted.
A set of flow control policies may be predefined, for example, 20M egress bandwidth in a college, and a network administrator may define the following set of flow control policies:
configuring a flow control strategy set 1 according to the application type: the bandwidth of the channel A1 is 10M, and the matching rule is an online game message; the bandwidth of the channel B1 is 7M, and the matching rule is a web browsing message; the bandwidth of the channel C1 is 3M, and the matching rule is P2P download message.
Configuring a flow control policy set 2 according to an Internet Protocol (IP) address of a user: the bandwidth of the channel A2 is 10M, and the matching rule is that all users with an internal network source IP network segment of 192.168.1.0; the bandwidth of the channel B2 is 7M, and the matching rule is that all users with an internal network source IP network segment of 192.168.2.0; 3M of channel C2, the matching rule is all users with an intranet source IP network segment of 192.168.3.0.
After configuring the flow control policy set, the flow control policy set corresponding to each port may be specified, and assuming that there are flow control policy set 3 and flow control policy set 4, the flow control policy set corresponding to port 1 may be configured to be 1 and 2, and the flow control policy set corresponding to port 2 may be configured to be 3 and 4.
After a port of a network device receives a message to be sent, the number of flow control policy sets corresponding to the port may be determined first.
And the sum of the bandwidths of at least one channel included in each flow control strategy set is the bandwidth of the port.
S12: and if the number of the flow control strategy sets corresponding to the ports is more than or equal to 2, determining the selected channel corresponding to the message in each flow control strategy set.
If the number of the flow control policy sets corresponding to the ports is less than 2, that is, 1, it can be determined whether to forward the packet directly according to the flow policy sets corresponding to the ports. If the number of the flow control policy sets corresponding to the ports is greater than or equal to 2, since each flow control policy set includes at least one channel, the channel to which the packet is directed in each flow control policy set may be determined as the selected channel.
S13: it is determined whether each selected channel allows the transmission of messages.
After determining the selected channel corresponding to the message in each set of flow control policies, it may be further determined whether each selected channel allows sending the message,
s14: and if each selected channel allows the message to be sent, sending the message.
If each selected channel allows to send the message, that is, the message needs to simultaneously satisfy all the flow control strategy sets corresponding to the port, the message can be sent; if at least one selected channel does not allow to send the message, that is, the message at least does not satisfy one flow control strategy set corresponding to the port, the message can only be discarded.
In the scheme, when the number of the flow control strategy sets corresponding to the ports of the network device is greater than or equal to 2, the selected channel corresponding to the message in each flow control strategy set can be determined, and the message is sent only if each selected channel allows sending the message, so that flow control is performed for a plurality of flow control strategy sets.
Specifically, the determining the number of the flow control policy sets corresponding to the ports in S11, as shown in fig. 2, specifically includes:
s111: and acquiring a first corresponding relation between the port and the flow control strategy set.
After the flow control policy sets are configured, the flow control policy set corresponding to each port may be designated, so as to establish a first corresponding relationship between the ports and the flow control policy sets.
S112: and searching a flow control strategy set corresponding to the port in the first corresponding relation.
S113: and counting the number of the flow control strategy sets corresponding to the ports.
The determination of the number of flow control policy sets corresponding to the ports can be realized through S111-S113.
Specifically, the implementation manner of the selected channel corresponding to the determination packet in S12 in each flow control policy set is as shown in fig. 3, and for each flow control policy set, the following is executed:
s121: and acquiring a second corresponding relation between the matching rules and the channels included in the current flow control strategy set.
Since the current flow control policy set includes the second corresponding relationship between the matching rule and the channel, when determining the selected channel corresponding to the packet in each flow control policy set, the second corresponding relationship between the matching rule and the channel included in the current flow control policy set may be obtained first.
S122: and determining the matching rules which are met by the message in the current flow control strategy set.
S123: and searching a channel corresponding to the matching rule which is met by the message in the current flow control strategy set in the second corresponding relation to obtain a selected channel corresponding to the message in the current flow control strategy set.
Continuing to use the example in S11, since the flow control policy sets corresponding to the port 1 are 1 and 2, for the flow control policy set 1, the matching rule corresponding to the packet is online, and the corresponding selected channel is a 1; for the flow control policy set 2, the rule of the message-to-mobile matching is that the IP address is a user in the segment 192.168.1.0, and the corresponding selected channel is a 2.
Through S121-S123, the selected channel corresponding to the packet in each flow control policy set can be determined.
Specifically, in the above S13, determining whether each selected channel allows sending a message, the implementation manner is as shown in fig. 4, and for each selected channel, the following steps are performed:
s131: determining whether the size of the residual token of the current selected channel is larger than or equal to the size of the message; if the size of the remaining token of the currently selected channel is larger than or equal to the size of the message, executing S132; if the size of the remaining token of the currently selected channel is smaller than the size of the packet, S133 is executed.
Whether the message is sent can be determined according to the relation between the size of the remaining token of the currently selected channel and the size of the message.
It should be noted that the remaining tokens of the currently selected channel may be the actual remaining tokens of the currently selected channel, and may be the remaining tokens borrowed from the total bandwidth of the port.
S132: and adding a transmission permission identifier in the message.
If the size of the remaining token of the current selected channel is larger than or equal to the size of the message, determining that the message can be sent, and adding an allowed sending identifier in the message.
S133: and adding a forwarding prohibition identifier in the message.
If the size of the remaining token of the current selected channel is larger than or equal to the size of the message, determining that the message can be sent, and adding an allowed sending identifier in the message.
It should be noted that throughput is the most important index for the network device, and as a mode of parallel scheduling of multiple flow control policy sets is adopted in the embodiment of the present invention, the forwarding performance of the network device can be fully utilized, and the overall performance of the network device is not greatly affected; if the throughput performance of the network equipment is not considered, a serial mode can be adopted, namely, the message firstly enters one flow control strategy set to complete scheduling, then enters another flow control strategy set to perform scheduling, and finally whether the message can be forwarded or not is determined.
Based on the same inventive concept, an embodiment of the present invention provides a parallel flow control apparatus, which can be applied to a port of a network device, and has a structure as shown in fig. 5, where the apparatus includes:
a first determining module 51, configured to determine, after receiving the packet, the number of flow control policy sets corresponding to the port, where a sum of bandwidths of at least one channel included in each flow control policy set is a bandwidth of the port;
a second determining module 52, configured to determine, if the number of the flow control policy sets corresponding to the ports is greater than or equal to 2, a selected channel corresponding to the packet in each flow control policy set;
a third determining module 53, configured to determine whether each selected channel allows sending a packet;
a sending module 54, configured to send a message if each selected channel allows sending the message.
In the scheme, when the number of the flow control strategy sets corresponding to the ports of the network device is greater than or equal to 2, the selected channel corresponding to the message in each flow control strategy set can be determined, and the message is sent only if each selected channel allows sending the message, so that flow control is performed for a plurality of flow control strategy sets.
Specifically, the first determining module 51 is specifically configured to:
acquiring a first corresponding relation between a port and a flow control strategy set;
searching a flow control strategy set corresponding to the port in the first corresponding relation;
and counting the number of the flow control strategy sets corresponding to the ports.
Specifically, the second determining module 52 is specifically configured to:
for each set of flow control policies, performing:
acquiring a second corresponding relation between a matching rule and a channel included in the current flow control strategy set;
determining a matching rule which is met by the message in the current flow control strategy set;
and searching a channel corresponding to the matching rule which is met by the message in the current flow control strategy set in the second corresponding relation to obtain a selected channel corresponding to the message in the current flow control strategy set.
Specifically, the third determining module 53 is specifically configured to:
for each selected channel, performing:
determining whether the size of the residual token of the current selected channel is larger than or equal to the size of the message;
if the size of the residual token of the current selected channel is larger than or equal to that of the message, adding a sending permission identifier in the message; and if the size of the residual token of the current selected channel is smaller than that of the message, adding a forwarding prohibition identifier in the message.
Optionally, a discarding module 54 is further included for:
if at least one selected channel does not allow the message to be sent, the message is discarded.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While alternative embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (10)
1. A parallel flow control method applied to a port of a network device is characterized by comprising the following steps:
after receiving a message, determining the number of flow control strategy sets corresponding to the port, wherein the sum of the bandwidths of at least one channel included in each flow control strategy set is the bandwidth of the port;
if the number of the flow control strategy sets corresponding to the ports is more than or equal to 2, determining a selected channel corresponding to the message in each flow control strategy set;
determining whether each of the selected channels allows the message to be sent;
and if each selected channel allows to send the message, sending the message.
2. The method of claim 1, wherein determining the number of flow control policy sets corresponding to the ports specifically comprises:
acquiring a first corresponding relation between a port and a flow control strategy set;
searching a flow control strategy set corresponding to the port in the first corresponding relation;
and counting the number of the flow control strategy sets corresponding to the ports.
3. The method according to claim 1, wherein determining the selected channel corresponding to the packet in each of the flow control policy sets specifically comprises:
for each of the sets of flow control policies, performing:
acquiring a second corresponding relation between a matching rule and a channel included in the current flow control strategy set;
determining a matching rule which is satisfied by the message in the current flow control strategy set;
and searching a channel corresponding to the matching rule which is met by the message in the current flow control strategy set in the second corresponding relation to obtain a selected channel corresponding to the message in the current flow control strategy set.
4. The method of claim 1, wherein determining whether each of the selected channels allows sending the message comprises:
for each of the selected channels, performing:
determining whether the size of the residual token of the current selected channel is larger than or equal to the size of the message;
if the size of the residual token of the current selected channel is larger than or equal to that of the message, adding a sending permission identifier in the message; and if the size of the residual token of the current selected channel is smaller than that of the message, adding a forwarding prohibition identifier into the message.
5. The method of any of claims 1-4, further comprising:
and if at least one selected channel does not allow the message to be sent, discarding the message.
6. A parallel flow control apparatus for use at a port of a network device, comprising:
a first determining module, configured to determine, after receiving a packet, the number of flow control policy sets corresponding to the port, where a sum of bandwidths of at least one channel included in each of the flow control policy sets is a bandwidth of the port;
a second determining module, configured to determine, if the number of the flow control policy sets corresponding to the port is greater than or equal to 2, a selected channel corresponding to the packet in each of the flow control policy sets;
a third determining module, configured to determine whether each selected channel allows sending the packet;
and the sending module is used for sending the message if each selected channel allows the message to be sent.
7. The apparatus of claim 6, wherein the first determining module is specifically configured to:
acquiring a first corresponding relation between a port and a flow control strategy set;
searching a flow control strategy set corresponding to the port in the first corresponding relation;
and counting the number of the flow control strategy sets corresponding to the ports.
8. The apparatus of claim 6, wherein the second determining module is specifically configured to:
for each of the sets of flow control policies, performing:
acquiring a second corresponding relation between a matching rule and a channel included in the current flow control strategy set;
determining a matching rule which is satisfied by the message in the current flow control strategy set;
and searching a channel corresponding to the matching rule which is met by the message in the current flow control strategy set in the second corresponding relation to obtain a selected channel corresponding to the message in the current flow control strategy set.
9. The apparatus of claim 6, wherein the third determining module is specifically configured to:
for each of the selected channels, performing:
determining whether the size of the residual token of the current selected channel is larger than or equal to the size of the message;
if the size of the residual token of the current selected channel is larger than or equal to that of the message, adding a sending permission identifier in the message; and if the size of the residual token of the current selected channel is smaller than that of the message, adding a forwarding prohibition identifier into the message.
10. The apparatus of any of claims 6-9, further comprising a discard module to:
and if at least one selected channel does not allow the message to be sent, discarding the message.
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