CN113872885B - Method and equipment for controlling message forwarding - Google Patents
Method and equipment for controlling message forwarding Download PDFInfo
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- CN113872885B CN113872885B CN202111163258.XA CN202111163258A CN113872885B CN 113872885 B CN113872885 B CN 113872885B CN 202111163258 A CN202111163258 A CN 202111163258A CN 113872885 B CN113872885 B CN 113872885B
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000005538 encapsulation Methods 0.000 claims abstract description 13
- 230000006870 function Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2425—Traffic characterised by specific attributes, e.g. priority or QoS for supporting services specification, e.g. SLA
- H04L47/2433—Allocation of priorities to traffic types
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
- H04L47/266—Stopping or restarting the source, e.g. X-on or X-off
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
The application provides a method and equipment for controlling message forwarding. The method comprises the following steps: determining that any virtual queue of ports that have enabled priority-based flow control PFC is congested; generating a stop transmission frame of a service priority class identifier corresponding to the congested virtual queue; the method comprises the steps that an IP tunnel is established by the connection of a last hop device of upstream equipment connected with a port; stopping sending frames based on IP tunnel encapsulation; and sending the packaged stop sending frame to the last hop device so as to stop the last hop device from sending the data message corresponding to the service priority class.
Description
Technical Field
The present application relates to communications technologies, and in particular, to a method and apparatus for controlling packet forwarding
Background
PFC (Priority-based Flow Control ) is a fine-grained flow control mechanism, and PFC functions flow control messages based on 802.1p Priority. The device enabling the PFC function can assign an 802.1p priority level to each virtual queue of the port, when the local end is congested, the device can judge according to the 802.1p priority level of the received message, if the 802.1p priority level of the received message starts the PFC function, the device receives the message and sends a PFC PAUSE frame to the opposite end, and the opposite end device is informed to temporarily stop sending the message. After receiving the PFC PAUSE frame, the opposite terminal device temporarily stops sending the message to the local terminal. While congestion is still present, this process will repeat until congestion is relieved.
The port may receive PFC PAUSE frames regardless of whether the port is configured with PFC functionality. But only the PFC function of the device is enabled. Therefore, when the upstream device of the device with the congested transmitting port does not support the PFC function, the upstream device of the congested device cannot limit the speed, resulting in unnecessary waste of network bandwidth caused by packet loss.
Disclosure of Invention
The application aims to provide a method and equipment for controlling message forwarding, and equipment incapable of supporting PFC (power factor correction) functions is isolated.
In order to achieve the above object, the present application provides a method for controlling message forwarding, where the method includes: determining that any virtual queue of ports that have enabled priority-based flow control PFC is congested; generating a first stop transmission frame of a first service priority class identifier corresponding to the congested virtual queue; the method comprises the steps that a first IP tunnel is established by connection of a last hop device of upstream equipment connected with a port; encapsulating the first stop sending frame based on the IP tunnel; and sending the packaged first stop sending frame to the last hop device so as to stop the last hop device from sending the data message corresponding to the first service priority class.
In order to achieve the above object, the present application further provides an apparatus for controlling forwarding of a message, where the apparatus includes a processor and a memory, where the memory is configured to store processor executable instructions; the processor is configured to execute the following operations by executing processor-executable instructions in the memory: determining that any virtual queue of ports that have enabled priority-based flow control PFC is congested; generating a first stop transmission frame of a first service priority class identifier corresponding to the congested virtual queue; the method comprises the steps that a first IP tunnel is established by connection of a last hop device of upstream equipment connected with a port; encapsulating the first stop sending frame based on the IP tunnel; and sending the packaged first stop sending frame to the last hop device so as to stop the last hop device from sending the data message corresponding to the first service priority class.
The method has the advantages that the PFC Pause frame is transmitted through the three-layer IP three-layer tunnel, equipment incapable of supporting the PFC function is isolated outside the logic forwarding channel of the PFC Pause frame, and the equipment upstream of the equipment incapable of supporting the PFC function stops sending the service types needing to be restrained.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a method for controlling forwarding of a message provided in the present application;
fig. 2 is a schematic forwarding diagram of an isolated device that does not support PFC functions provided in the present application;
fig. 3 is a schematic diagram of an embodiment of an apparatus for controlling forwarding of a packet provided in the present application.
Detailed Description
A plurality of examples shown in the drawings will be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the examples.
The term "comprising" as used in the terminology includes, but is not limited to; the term "comprising" means including but not limited to; the terms "above," "within," and "below" encompass the present number; the terms "greater than", "less than" mean that the number is not inclusive. The term "based on" means based at least in part on a portion thereof.
The embodiment of the method for controlling message forwarding provided in the present application shown in fig. 1 includes the following steps:
step 101, determining that any virtual queue of ports that have enabled priority-based flow control PFC is congested;
102, generating a stop transmission frame of a service priority class identifier corresponding to a congested virtual queue;
step 103, establishing an IP tunnel by the last hop device connection of the upstream device connected with the port;
104, stopping sending frames based on IP tunnel encapsulation;
and 105, sending the packaged transmission stopping frame to the previous hop device so as to stop the previous hop device from sending the data message corresponding to the service priority class.
The embodiment shown in fig. 1 has the beneficial effects that the PFC Pause frame is transmitted through the IP tunnel, the device incapable of supporting the PFC function is isolated outside the logical forwarding channel of the PFC Pause frame, and the device upstream of the device incapable of supporting the PFC function stops sending the service types to be suppressed, so as to achieve the purpose of solving the network congestion.
Fig. 2 is a schematic forwarding diagram of an isolated device that does not support PFC functions provided in the present application. In fig. 2, servers S1 and S2 send data messages to server S3. The server S1 sends the data packet to the switch 21 to be accessed, and sends the data packet to the router R3 through the switch 21. The router R3 sends the data message to the router R3 hop by hop according to the destination IP address of the data message. Similarly, the server S3 sends the three-layer data packet to the router R4, and the router R4 sends the three-layer data packet to the router R3 hop by hop according to the destination IP address of the data packet.
In this example, routers R1, R3, R4 enable PFC functionality on the ports. In the virtual queues 0-7 of the port P3, which receives the data packet, the router R3 assumes that the data packet stored in the virtual queue 7 reaches the upper storage limit and is congested.
The router R3 generates PFC Pause frames with the priority according to the 802.1P priority 7 of the data messages cached by the virtual queue 7 of the port P3.
Router R3 sends PFC Pause frames through port P3 to upstream device router R2 to which the port is connected. Router R2 may receive PFC Pause frames through port P2 but will not stop sending 802.1P priority 7 data packets that need to be suppressed.
A short time may be set on the router R3 to determine whether the port that sent the PFC Pause frame still continues to receive the 802.1p priority 7 data packet that needs to be suppressed.
The router R3 determines that the data message of the suppressed 802.1P priority 7 is still continuously received on the port P3, and the port P3 of the router R3 and the last hop router R1 of the router R2 are connected with the three-layer interface P1 of the router R2 to establish an IP Tunnel 1; the port P3 of the router R3 and the last hop router R4 of the router R2 are connected with the three-layer interface P4 of the router R2 to establish an IP Tunnel 2.
Router R3 encapsulates the PFC Pause frame with 802.1p priority 7 with Tunnel1 encapsulation information. The router R2 receives the PFC Pause frame carried by the tunnel1 and sends the PFC Pause frame to the router R1 according to the destination IP address of the IP tunnel. After the router R1 receives the packet, it unpacks and stops sending the data packet of the virtual queue corresponding to the 802.1P priority 7 at the receiving port P1.
Likewise, router R3 encapsulates the PFC Pause frame with 802.1p priority 7 with Tunnel2 encapsulation information. The router R2 receives the PFC Pause frame carried by the tunnel2 and sends the PFC Pause frame to the router R4 according to the destination IP address of the IP tunnel. After the router R4 receives the packet, it unpacks and stops sending the data packet of the virtual queue corresponding to the 802.1P priority 7 at the receiving port P4.
When the buffered 802.1P priority 7 data packet of the virtual queue 7 of the port P3 of the router R3 is below the threshold, the congestion is relieved, the router R3 stops sending the encapsulated PFC Pause frames through the Tunnel1 and the Tunnel2, and the routers R1 and R4 resume sending the 802.1P priority 7 data packet through the respective ports P1, P4.
Similarly, even if the downstream device of the router R3 does not support the PFC function, an IP tunnel may be established with the downstream router supporting the PFC function according to the above manner, isolating the router not supporting the PFC function, suppressing forwarding of the data packet that causes congestion, and avoiding packet loss caused by network congestion.
Besides the above way of dynamically controlling the forwarding of congestion messages, the network manager can directly configure a static IP tunnel at the upstream and downstream network devices of the router device which does not support PFC functions, and designate PFC Pause to forward through the IP tunnel.
Fig. 3 is a schematic diagram of an embodiment of an apparatus for controlling forwarding of a packet provided in the present application. The device 30 includes a processor and a memory for storing processor-executable instructions; the processor is configured to execute the following operations by executing processor-executable instructions in the memory: determining that any virtual queue of ports that have enabled priority-based flow control PFC is congested; generating a first stop transmission frame of a first service priority class identifier corresponding to the congested virtual queue; the method comprises the steps that a first IP tunnel is established by connection of a last hop device of upstream equipment connected with a port; encapsulating the first stop sending frame based on the IP tunnel; and sending the packaged first stop sending frame to the last hop device so as to stop the last hop device from sending the data message corresponding to the first service priority class.
Before the processor establishes the first IP tunnel by executing the instruction in the memory to execute the previous hop device connection with the upstream device connected to the port, the processor further executes the following operations: transmitting a stop transmission frame with a first service priority class identifier to upstream equipment; and determining that the data message with the service priority class is received through the port within the set time.
The processor also performs the following operations by executing the processor-executable instructions in the memory: determining that congestion of the virtual queue has been eliminated; and stopping sending the encapsulated first stop sending frame.
The processor also performs the following operations by executing the processor-executable instructions in the memory: establishing a second IP tunnel with a next hop device of the downstream device; receiving a second stop transmission frame based on a second IP tunnel encapsulation; and releasing the second IP tunnel encapsulation, and stopping sending the data message corresponding to the second service priority class in the second stop sending frame on the receiving port of the second stop sending frame of the second IP tunnel encapsulation.
The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (8)
1. A method for controlling message forwarding, the method comprising:
determining that any virtual queue of ports that have enabled priority-based flow control PFC is congested;
generating a first stop transmission frame with a first service priority class identifier corresponding to the congested virtual queue;
establishing a first IP tunnel by connecting a last hop device of upstream equipment connected with the port;
encapsulating the first stop sending frame based on the IP tunnel;
and sending the packaged first stop sending frame to the previous hop device so that the previous hop device stops sending the data message corresponding to the first service priority class.
2. The method of claim 1, wherein prior to establishing the first IP tunnel for a previous hop device connection of an upstream device connected to the port, the method further comprises;
transmitting the first stop transmission frame with the first service priority class identifier to the upstream equipment;
and determining that the data message with the service priority class is received through the port within the set time.
3. The method according to claim 1, wherein the method further comprises:
determining that congestion of the virtual queue has been removed;
and stopping sending the encapsulated first stop sending frame.
4. The method according to claim 1, wherein the method further comprises:
establishing a second IP tunnel with a next hop device of the downstream device;
receiving a second stop transmission frame based on the second IP tunnel encapsulation;
and releasing the second IP tunnel encapsulation, and stopping sending the data message corresponding to the second service priority class in the second stop sending frame on the receiving port of the second stop sending frame of the second IP tunnel encapsulation.
5. An apparatus for controlling forwarding of a message, the apparatus comprising a processor and a memory, the memory configured to store processor-executable instructions; the processor is configured to execute the following operations by executing processor-executable instructions in the memory:
determining that any virtual queue of ports that have enabled priority-based flow control PFC is congested;
generating a first stop transmission frame with a first service priority class identifier corresponding to the congested virtual queue;
establishing a first IP tunnel by connecting a last hop device of upstream equipment connected with the port;
encapsulating the first stop sending frame based on the IP tunnel;
and sending the packaged first stop sending frame to the previous hop device so that the previous hop device stops sending the data message corresponding to the first service priority class.
6. The device of claim 5, wherein the processor further performs the following before establishing the first IP tunnel by executing instructions in the memory to perform a previous hop device connection with an upstream device connected to the port:
transmitting the first stop transmission frame with the first service priority class identifier to the upstream equipment;
and determining that the data message with the service priority class is received through the port within the set time.
7. The apparatus of claim 5, wherein the processor further performs the following by executing processor-executable instructions in the memory:
determining that congestion of the virtual queue has been removed;
and stopping sending the encapsulated first stop sending frame.
8. The apparatus of claim 5, wherein the processor further performs the following by executing processor-executable instructions in the memory:
establishing a second IP tunnel with a next hop device of the downstream device;
receiving a second stop transmission frame based on the second IP tunnel encapsulation;
and releasing the second IP tunnel encapsulation, and stopping sending the data message corresponding to the second service priority class in the second stop sending frame on the receiving port of the second stop sending frame of the second IP tunnel encapsulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111163258.XA CN113872885B (en) | 2021-09-30 | 2021-09-30 | Method and equipment for controlling message forwarding |
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| CN202111163258.XA CN113872885B (en) | 2021-09-30 | 2021-09-30 | Method and equipment for controlling message forwarding |
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| CN113872885B true CN113872885B (en) | 2024-02-09 |
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| US9030935B2 (en) * | 2011-03-30 | 2015-05-12 | International Business Machines Corporation | Device and method for adjusting rate limits for transmission rates of data flows having a certain priority in a transmitter |
| US11277342B2 (en) * | 2019-10-29 | 2022-03-15 | Dell Products L.P. | Lossless data traffic deadlock management system |
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2021
- 2021-09-30 CN CN202111163258.XA patent/CN113872885B/en active Active
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