WO2015196647A1 - Procédé et appareil de sélection de chemin pour un système d'empilement de topologie en anneau et un dispositif maître - Google Patents

Procédé et appareil de sélection de chemin pour un système d'empilement de topologie en anneau et un dispositif maître Download PDF

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WO2015196647A1
WO2015196647A1 PCT/CN2014/088797 CN2014088797W WO2015196647A1 WO 2015196647 A1 WO2015196647 A1 WO 2015196647A1 CN 2014088797 W CN2014088797 W CN 2014088797W WO 2015196647 A1 WO2015196647 A1 WO 2015196647A1
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path
bandwidth
bandwidth resource
stacking
link
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PCT/CN2014/088797
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English (en)
Chinese (zh)
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潘庭山
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中兴通讯股份有限公司
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  • the present invention relates to the field of communications, and in particular, to a ring topology stacking system path selection method, apparatus, and host device.
  • Stacking combines multiple switch devices that support stacking and logically combines them into a single switching device.
  • Stacking is a virtualization technology that virtualizes multiple devices on the same layer of a network into a single logical device without changing the physical topology of the network. This simplifies the network structure, simplifies network protocol deployment, and improves network reliability. Administrative purpose.
  • the stacking technology can simplify the complex network topology into a hierarchical network with simple interconnections.
  • the links between the network layers are aggregated through links to eliminate loops.
  • Protocols such as the Multiple Spanning Tree Protocol (MSTP) and the Virtual Router Redundancy Protocol (VRRP).
  • connection topology of the stack is shown in Figure 1 and Figure 2. There are two structures:
  • Chain connection use a stacking cable to connect the left port (right port) of one device to the right port (left port) of another device, and so on, the right port of the first device (left port) And the last one The stacking cable is not connected to the left port (right port) of the device.
  • Ring connection connect the right port (left port) of the chain connection to the first device and the left port (right port) of the last device.
  • the master switch, Master is responsible for managing the entire stacking system. There is only one master switch in the stacking system. In Figure 1 and Figure 2, switch 1 is the master switch, that is, the master device;
  • the backup switch that is, the standby switch, is the backup switch of the master switch.
  • the standby switch takes over all services of the master switch. There is only one standby switch in the stack.
  • switch 2 is Standby switch, that is, standby equipment;
  • the stack ID which is the member ID, is used to identify and manage member devices.
  • the stack IDs of all member devices in the stack are unique.
  • the stack priority is an attribute of a member device. It is used to determine the role of member devices during the role election. The higher the priority, the higher the priority. The greater the probability of being elected as the master switch.
  • a stacking split is a stacking system in a steady-state stacking system.
  • the stacking system becomes a stacking system.
  • multiple stacking systems with the same configuration may be generated. This causes a conflict between the IP address and the Media Access Control (MAC) address in the network, and a network failure.
  • the chain connection stack is more likely to be split. Because the stack cable is faulty, the stack splits. Therefore, the ring connection is generally recommended for security in the actual networking.
  • the ring topology network is a common networking mode in the stack system. Since there are two directions in the forwarding between ring devices, path selection is a problem that must be considered in the ring network topology.
  • a common practice is to determine the optimal path based on the number of links through which the path passes, the bandwidth of each link, and the duplex mode of the port where the link resides.
  • the bandwidth of the stack ports on the ring is the same, and the types of stack ports are basically full-duplex. Therefore, the actual number of links actually remains, and the path with the least number of links on the path is the optimal path selected, that is, the shortest path.
  • This path selection method does not consider link bandwidth utilization. In some cases, even if some links on the shortest path are very congested and the link on the other path is very idle at this time, the shortest As the optimal path, the path leads to unreasonable resource allocation, which reduces the availability of the system and the flexibility of networking.
  • the embodiment of the invention provides a method, a device and a master device for selecting a path of a ring topology stacking system, and solves the problem that the resource allocation of the ring topology stacking system of the related technology adopts the shortest path selection method is unreasonable.
  • a ring topology stacking system path selection method the ring topology stacking system includes a plurality of devices connected in a ring stack; the method includes:
  • the method before acquiring the current bandwidth resource occupancy rate of the stacking link on the first path and the second path in the different directions between the two devices, the method further includes:
  • the path with the lowest priority is directly selected as the working path.
  • the method before acquiring the current bandwidth resource occupancy rate of the stacking link on the first path and the second path in the different directions between the two devices, the method further includes:
  • the path bandwidth of the first path is different from the path bandwidth of the second path, the path with a large path bandwidth is directly selected as the working path.
  • the method when determining that the lowest priority of the stacking port on the first path is the same as the lowest priority of the stacking port on the second path, obtaining different directions between the two devices Before the current bandwidth resource occupancy of the stacking link on the first path and the second path, the method further includes:
  • the path bandwidth of the first path is different from the path bandwidth of the second path, the path with a large path bandwidth is directly selected as the working path.
  • the path bandwidth resource usage ratios of the first path and the second path are equal, respectively acquiring the stack links on the first path and the second path For the total number, select the path with the total number of stacked links as the working path.
  • obtaining the path bandwidth resource usage rate of the first path and the second path according to the current bandwidth resource occupancy ratio of the stack link includes:
  • a sum of weight values of the stacking links on the first path is the The path bandwidth resource occupancy rate of the path
  • the sum of the weight values of the stack links on the second path is the path bandwidth resource occupancy rate of the second path.
  • the method further includes:
  • the present invention further provides a path selection device for a ring topology stacking system, which is used for determining a working path between two devices in a ring topology stacking system, including: a first information acquiring module, a processing module, and a first selection Module
  • the first information acquiring module is configured to acquire the current bandwidth resource occupancy rate of the stacking link in the first path and the second path in the different directions between the two devices;
  • the processing module is configured to obtain a path bandwidth resource occupancy rate of the first path and the second path according to a current bandwidth resource occupancy ratio of the stack link.
  • the first selection module is configured to select a path bandwidth resource occupancy ratio from the first path and the second path as a working path between the two devices.
  • the second information acquiring module is further configured to acquire the current bandwidth resource occupation of the stack link in the resource information acquiring module. Prior to the rate, the priority of the stacking ports on the first path and the second path is obtained, and different types of ports correspond to different priorities;
  • the second selection module is configured to directly select the path with the lowest priority as the working path when the lowest priority of the stacking port on the first path is different from the lowest priority of the stacking port on the second path.
  • the method further includes a third information acquiring module and a third selecting module, where the third information acquiring module is configured to stack the lowest priority and the second of the port on the first path
  • the third information acquiring module is configured to stack the lowest priority and the second of the port on the first path
  • the first path and the first path are obtained before the current bandwidth resource occupancy rate of the stacking link on the first path and the second path in the two paths are obtained.
  • the bandwidth supported by the stacking link on the two paths, and the minimum bandwidth supported by the stacking link on the first path and the second path as the path bandwidth of the first path and the second path, respectively;
  • the third selection module is configured to directly select a path with a large path bandwidth as a working path when the path bandwidth of the first path and the path bandwidth of the second path are not equal.
  • the method further includes: a statistic module, configured to separately calculate the first path and the location when the path bandwidth resource usage ratios of the first path and the second path are equal The total number of stacking links on the second path is the working path.
  • the processing module includes a setting submodule, a conversion submodule, and a computing submodule:
  • the setting sub-module is configured to set a correspondence between the bandwidth resource occupancy rate of the stack link and the different weight values, and the larger the bandwidth resource occupancy rate, the larger the corresponding weight value;
  • the conversion submodule is configured to convert the bandwidth resource occupancy rate of the stack link into a corresponding weight value
  • the calculating sub-module is configured to separately calculate a sum of a weight value of a stacking link on the first path and a weight value of a stacking link on the second path; and a weight of the stacking link on the first path
  • the sum of the values is the path bandwidth resource occupancy of the first path
  • the sum of the weight values of the stack links on the second path is the path bandwidth resource occupancy of the second path.
  • the fourth information acquiring module further includes a fourth information acquiring module, a determining module, and a triggering module.
  • the fourth information acquiring module is configured to follow a setting rule after determining a working path between the two devices. Obtaining the current bandwidth resource occupancy rate of the stack link on the working path,
  • the determining module is configured to determine whether there is a stack link with a bandwidth resource usage ratio greater than a bandwidth resource occupancy threshold, and if yes, notify the trigger module;
  • the triggering module is configured to trigger a re-determination of a working path between two devices in the device.
  • an embodiment of the present invention further provides a master device of a ring topology stacking system, including a memory and a processor; the memory is configured to store instructions; and the processor is configured to determine the ring topology stacking system
  • the instruction is invoked to perform the following steps:
  • Embodiments of the present invention also provide a computer program, including program instructions, when the program instructions are When the master device of the ring topology stacking system is executed, the master device can perform the above method.
  • Embodiments of the present invention also provide a carrier carrying the above computer program.
  • the path selection method, device and main device of the ring topology stacking system provided by the embodiments of the present invention can avoid the path of the congestion as the working path, and make the resource allocation more reasonable, thereby improving the availability of the system and the flexibility of the networking.
  • FIG. 1 is a schematic structural diagram of a chain topology stacking system
  • FIG. 2 is a schematic structural diagram of a ring topology stacking system
  • FIG. 3 is a schematic flowchart of a path selection method of a ring topology stacking system according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic structural diagram of a path selection device of a ring topology stacking system according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a chain topology stacking system according to Embodiment 3 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a ring topology stacking system a plurality of devices including a ring stack connection, one of which is a master device and one of which is a slave device, and the rest are slave devices, wherein the standby device is also a slave device;
  • the connected port is a stacking port;
  • the connecting cable is a stacking link.
  • the switch 1, the switch 2, the switch 3, and the switch 4 are connected in a stack; each switch has two stack ports, and two stack ports on different switches are connected.
  • the link is a stacking link.
  • One of the ring topology stacking systems There are two paths in the different directions from the device to the other device; one path is called the first path in this embodiment, and the other path is called the second path; there is at least one stack link on each path.
  • first path between switch 1 and switch 2: switch 1 -> switch 2 and second path: switch 1 -> switch 4 -> switch 3 -> switch 2; on the first path
  • stacking link there is a stacking link; there are three stacking links on the second path; and the stacking link between switch 1 and switch 2 is in the direction of switch 1 -> switch 2, and the stacking port on switch 1 is the stack.
  • Link exit; the stack port on switch 2 is the entry to the stack link.
  • the bandwidth resource occupancy of the stack link can be obtained by counting the traffic of the egress and/or the ingress of the stack link and the bandwidth supported by the egress and/or the ingress. For example, if the stack port that serves as the egress and the ingress on a stack link supports the bandwidth of 10 Gigabit (that is, the 10 Gigabit port, and the current traffic 2 passing through the port is Gigabit, the bandwidth resource of the stack link is occupied. The rate is 20%. At the same time, the bandwidth supported by the stack link is 10 megabytes. The bandwidth of each stack link in Figure 2 is 10 Mbps.
  • the first path: switch 1-> switch 2 and the second path: the switch 1 -> switch 4 -> switch 3 -> switch 2 path bandwidth is also 10 megabytes. That is, in this embodiment, the bandwidth of the stack link with the smallest bandwidth supported on one path is Path bandwidth.
  • the type of the stack port generally includes a full-duplex port and a half-duplex port; wherein the full-duplex port has a priority greater than the half-duplex port.
  • the method for selecting a path of a ring topology stacking system in this embodiment, when determining a working path between two devices in a ring topology stacking system includes:
  • Step 301 Obtain the current bandwidth resource occupancy rate of the stacking link on the first path and the second path in the different directions between the two devices.
  • Step 302 Obtain a path bandwidth resource occupancy rate of the first path and the second path according to the current bandwidth resource occupancy rate of the stack link.
  • Step 303 Select a path bandwidth resource occupancy rate from the first path and the second path as a working path between the two devices.
  • the total number of stack links on the first path and the second path may be respectively obtained, and the path with the total number of stacked links is selected as The working path; that is, the shortest path can be selected as the working path at this time. At this point, the number of stack links is combined.
  • the path bandwidth resource occupancy rate is selected from the first path and the second path as the working path between the two devices; this avoids selecting the congested path as the working path, so that the resource allocation is more reasonable, thereby improving System availability and networking flexibility.
  • At least one of the type of the stacking port on the path, the path bandwidth of the path, and even the number of stacked links on the path may be combined.
  • the type of the stacking port on the path, the path bandwidth of the path, and even the number of stacked links on the path may be combined.
  • the priority of the stacking ports on the first path and the second path of the two devices are obtained, and different types of ports correspond to different priorities.
  • the path with the lowest priority is directly selected as the working path.
  • the lowest priority of the stacking port in the first path is the same as the lowest priority of the stacking port in the second path, and the current bandwidth resources of the stacking link in the first path and the second path in the second path are obtained. Occupancy rate;
  • the path bandwidth resource occupancy rate is selected from the first path and the second path as a working path between the two devices.
  • the path bandwidth of the first path and the path bandwidth of the second path are not equal, the path with a large path bandwidth is directly selected as the working path;
  • the path bandwidth of the first path is equal to the path bandwidth of the second path, the current bandwidth resource occupancy rate of the stacking link in the first path and the second path in the two paths is obtained.
  • the path bandwidth resource occupancy rate is selected from the first path and the second path as a working path between the two devices.
  • the working path between the two devices is determined by the type of the stacking port on the path, the path bandwidth of the path, and the bandwidth resource utilization:
  • the priority of the stacking ports on the first path and the second path of the two devices are obtained, and different types of ports correspond to different priorities.
  • the path with the lowest priority is directly selected as the working path.
  • the lowest priority of the stacking port on the first path is the same as the lowest priority of the stacking port on the second path, and the bandwidth supported by the stacking link on the first path and the second path between the two devices is obtained, and the first priority is respectively obtained.
  • a minimum bandwidth supported by the stack link on the path and the second path as a path bandwidth of the first path and the second path;
  • the path bandwidth of the first path and the path bandwidth of the second path are not equal, the path with a large path bandwidth is directly selected as the working path;
  • the path bandwidth of the first path is equal to the path bandwidth of the second path, the current bandwidth resource occupancy rate of the stacking link in the first path and the second path in the two paths is obtained.
  • the path bandwidth resource occupancy rate is selected from the first path and the second path as a working path between the two devices.
  • the bandwidth of the stack link is dynamically changed. Therefore, in this embodiment, the working path can be dynamically adjusted according to the bandwidth utilization rate of the stack link on the working path. Make resource allocation more reasonable. To this end, the bandwidth usage threshold of the bandwidth is set to be relatively large, for example, 80% or more, to avoid frequent repeated calculations. At this time, the application also includes the following steps:
  • the preset rule may be obtained according to the set period
  • the path bandwidth resource occupancy rate of the first path and the second path is obtained according to the current bandwidth resource occupancy rate of the stack link in the foregoing step 302, where:
  • the sum of the weights of the stacking links on the first path and the weights of the stacking links on the second path are respectively calculated; the sum of the weights of the stacking links on the first path is the path bandwidth resource occupancy of the first path.
  • the sum of the weight values of the stack links on the second path is the path bandwidth resource occupancy of the second path.
  • the egress bandwidth resource usage (that is, the stack link bandwidth resource occupancy ratio) is equal to the bandwidth resource occupancy threshold.
  • the corresponding weight is: (number of stack system devices + 1)/2 If the bandwidth resource occupancy rate is greater than or equal to 99%, the corresponding weight is: the number of devices in the stack system is -1.5; the bandwidth resource usage is less than the bandwidth resource occupancy threshold, the corresponding weight is 1, the bandwidth resource occupancy rate is in the bandwidth resource occupancy threshold, and 99.
  • the corresponding weights between % bandwidth utilization are: (number of stack system devices +1) / 2+ ((number of devices - 4) / 2) * (bandwidth utilization - bandwidth utilization trigger threshold) / (99% - bandwidth utilization trigger threshold)).
  • the weight corresponding to the bandwidth resource usage threshold is 1, and the weight greater than the trigger threshold is: 1.5 for the ring stack system.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the present embodiment provides a path selection device for a ring topology stacking system, which is used to determine a working path between two devices in a ring topology stacking system.
  • the method includes: a first information acquiring module, a processing module, and First selection module;
  • the first information acquiring module is configured to obtain the current bandwidth resource occupancy rate of the stacking link in the first path and the second path in the different directions between the two devices;
  • the processing module is configured to obtain a path bandwidth resource occupancy rate of the first path and the second path according to a current bandwidth resource occupancy ratio of the stack link.
  • the first selection module is configured to select a path bandwidth resource occupancy ratio from the first path and the second path to be a working path between the two devices.
  • the ring topology stacking system path selecting apparatus in this embodiment further includes a second information acquiring module and a second selecting module, where the second information acquiring module is configured to obtain the resource resource acquiring module before acquiring the current bandwidth resource occupancy rate of the stack link.
  • the priority of the stacking ports on the first path and the second path correspond to different priorities.
  • the second selection module is configured to directly select the path with the lowest priority as the working path when the lowest priority of the stacking port on the first path is different from the lowest priority of the stacking port on the second path.
  • the ring topology stacking system path selecting apparatus in this embodiment further includes a third information acquiring module and a third selecting module, where the third information acquiring module is configured to stack the port with the lowest priority and the second path on the first path. Obtaining the support of the stacking link on the first path and the second path before obtaining the current bandwidth resource usage of the stacking link on the first path and the second path in the different directions between the two devices. Bandwidth, and respectively using the minimum bandwidth supported by the stack link on the first path and the second path as path paths of the first path and the second path width;
  • the third selection module is configured to directly select a path with a large path bandwidth as the working path when the path bandwidth of the first path and the path bandwidth of the second path are not equal.
  • the ring topology stacking system path selecting apparatus in this embodiment further includes a statistic module, configured to separately calculate the stacking chain on the first path and the second path when the path bandwidth resource occupancy ratios of the first path and the second path are equal. For the total number of paths, select the path with the total number of stacked links as the working path.
  • the path topology selection device of the ring topology stacking system in this embodiment further includes a fourth information acquiring module, a determining module, and a triggering module.
  • the fourth information acquiring module is configured to obtain the working according to the setting rule after determining the working path between the two devices. Current bandwidth resource usage of the stack link on the path.
  • the determining module is configured to determine whether there is a stack link whose bandwidth resource usage ratio is greater than the bandwidth resource occupancy threshold, and if yes, notify the triggering module;
  • the trigger module is configured to trigger a re-determination of the working path between the two devices in the device.
  • the processing module of the path selection device of the ring topology stacking system includes a setting submodule, a conversion submodule, and a computing submodule:
  • the setting sub-module is set to set the correspondence between the bandwidth resource usage of the stack link and the different weight values.
  • the specific setting mode is not described here.
  • the conversion submodule is configured to convert the bandwidth resource occupancy rate of the stack link into a corresponding weight value
  • the calculation submodule is configured to calculate a sum of a weight value of the stack link on the first path and a weight value of the stack link on the second path, respectively; the sum of the weight values of the stack links on the first path is the first path
  • the path bandwidth resource occupancy rate, and the sum of the weight values of the stack links on the second path is the path bandwidth resource occupancy rate of the second path.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the main device of the ring topology stacking system in this embodiment includes a memory and a processor; the memory is set to store instructions; and the processor is configured to determine two devices in the ring topology stacking system (including When the working path between one device is the master device, the instruction in the memory is retrieved to perform the following steps:
  • a path bandwidth resource occupancy rate is selected from the first path and the second path as a working path between the two devices.
  • the processor calls the above instructions in addition to the above steps, and can perform other steps as exemplified in the first embodiment.
  • the following takes a specific ring topology stacking system as an example: As shown in Figure 5, the system includes switch 1, switch 2, switch 3, and switch 4 and switch 5. The five devices are connected through the stack port port.
  • the stacking system of the ring topology is a full-duplex type of the 10G port.
  • the topology discovery phase assumes that the traffic stacking port has no service traffic.
  • switch 1 is the master device
  • switch 2 is the standby device
  • switches 3, 4, and 5 are slave devices.
  • the bandwidth usage threshold of the stack interface exiting the path of the master device recalculating path that is, the bandwidth resource occupancy threshold
  • the stacking system operates as follows:
  • the switch 2, 3, 4, and 5 report the stack port usage and the stack port bandwidth utilization (currently 0) to the master device switch.
  • the master device switch 1 the running path selection algorithm, because the port bandwidth is 10G, the port working mode is full duplex, and the port outlet bandwidth utilization is less than 80%, then the path is determined according to the link length; for example, the switch 4
  • the path to switch 2 is switch 4->switch 1->switch 2.
  • the path of switch 1 to switch 2 is switch 1 -> switch 2.
  • the slave device and the standby device periodically advertise the outbound bandwidth usage of the stack port to the master device switch 1.
  • Switch 1 finds that the inbound bandwidth utilization of all stack ports is less than 80%, so the path is not recalculated.
  • the 20 ports of switch 1 have 800M traffic directly going to switch 2, and the stack of switch 2 is The port (port between switches 1, 2) has an outbound bandwidth of 80%.
  • the master device On the slave device, the master device periodically advertises the inbound bandwidth usage of the stack interface to the master device switch 1.
  • the switch 1 finds that the outbound bandwidth usage of the stack interface is greater than or equal to 80%, and triggers the path selection algorithm in the stack system.
  • the weight setting method in the first embodiment is taken as an example:
  • the link weights of the links between switches 1, 2 are:
  • the master device finds that the path selection result is different from the previous one and notifies all other devices.
  • the path will be switch 4->switch 5->switch 3>switch 2. If the algorithm of the present invention is not used, the traffic of the switch 4 and the switch 1 to the switch 2 is the shortest path, and the traffic passes through the link between the switches 1 and 2, which causes congestion on the link, resulting in congestion. Packet loss, which affects the flexibility of networking.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the embodiment of the invention can avoid the path of the congestion as the working path, and make the resource allocation more reasonable, thereby improving the availability of the system and the flexibility of the networking.

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Abstract

L'invention concerne un procédé et un appareil de sélection de chemin pour un système d'empilement de topologie en anneau et un dispositif maître. Lorsqu'un chemin de travail entre deux dispositifs dans un système d'empilement de topologie en anneau peut être déterminé, des taux d'occupation de ressource de bande passante courants de liaisons d'empilement sur un premier chemin et un second chemin qui sont dans des directions différentes et entre les deux dispositifs sont acquis ; un taux d'occupation de ressource de bande passante de chemin du premier chemin et un taux d'occupation de ressource de bande passante de chemin du second chemin sont obtenus selon les taux d'occupation de ressource de bande passante courants des liaisons d'empilement ; puis un chemin ayant un taux d'occupation de ressource de bande passante de chemin plus petit est sélectionné parmi le premier chemin et le second chemin pour servir de chemin de travail entre les deux dispositifs.
PCT/CN2014/088797 2014-06-24 2014-10-17 Procédé et appareil de sélection de chemin pour un système d'empilement de topologie en anneau et un dispositif maître WO2015196647A1 (fr)

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