WO2016065804A1 - Procédé d'équilibrage de charges de trafic et dispositif de routage - Google Patents

Procédé d'équilibrage de charges de trafic et dispositif de routage Download PDF

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WO2016065804A1
WO2016065804A1 PCT/CN2015/074423 CN2015074423W WO2016065804A1 WO 2016065804 A1 WO2016065804 A1 WO 2016065804A1 CN 2015074423 W CN2015074423 W CN 2015074423W WO 2016065804 A1 WO2016065804 A1 WO 2016065804A1
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virtual
routing device
forwarder
primary
address
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PCT/CN2015/074423
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English (en)
Chinese (zh)
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赵艳华
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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 technologies, and in particular, to a traffic load balancing method and a routing device.
  • VRRP Virtual Router Redundancy Protocol
  • a master primary routing device
  • multiple backups alternate routing devices
  • a set of VRRP redundancy protocols are configured for all routing devices of the virtual router.
  • only one primary routing device in a VRRP backup group can forward user traffic. That is to say, the user hosts of the local area network communicate with the external network through the primary routing device, and other backup routing devices in the backup group do not participate in load sharing, thus wasting idle device resources.
  • the prior art provides a load balancing solution, that is, multiple VRRP backup groups are set up on one virtual router, and each routing device in the virtual router serves as the primary routing device of a VRRP backup group. In this way, the routing device in the virtual router can forward part of the user traffic, thereby implementing gateway traffic load balancing.
  • the gateway has an IP address. Therefore, when there are a large number of users, it is very inconvenient to configure different gateway IP addresses for the user side. And this load balancing is statically implemented, and the effect is not ideal.
  • the technical problem at least in the embodiments of the present invention is to provide a traffic load balancing method and a routing device, which can dynamically implement traffic load balancing of each routing device in the same VRRP group.
  • An embodiment of the present invention provides a traffic load balancing method, which is applied to a virtual router.
  • Each routing device of the virtual router is pre-configured with an active virtual forwarder, and a virtual address of the primary virtual forwarder of each routing device.
  • the traffic load balancing method includes:
  • the primary routing device After receiving the address resolution request message initiated by multiple users, the primary routing device allocates an active virtual forwarder to each user according to the load balancing policy, and feeds back the response message to each user through the address resolution response message.
  • the virtual address of the active virtual forwarder enables the user to send user traffic according to the virtual address obtained by the feedback;
  • Each routing device of the virtual router learns the virtual address of the primary virtual forwarder on the other routing device, and establishes an alternate virtual forwarder according to the learned virtual address; wherein the primary virtual forwarder of the same virtual address and the standby virtual forwarding Corresponding relationship;
  • Each routing device of the virtual router performs fault monitoring to the corresponding primary repeater through its standby virtual forwarder
  • the other routing device activates the standby virtual forwarder corresponding to the failed primary virtual forwarder, thereby taking over the failed primary virtual forwarder. User traffic.
  • the primary virtual forwarder and the standby virtual forwarder of the same virtual address have respective second priorities
  • the other routing device activates the standby virtual forwarder corresponding to the failed primary virtual forwarder, including:
  • the other routing devices After the primary virtual forwarder of a routing device fails, the other routing devices perform election according to the second priority of the alternate routing device corresponding to the failed primary routing device, and determine a takeover routing device;
  • the takeover routing device activates its alternate routing device corresponding to the failed primary routing device.
  • the active virtual forwarder or the standby virtual forwarder is specifically:
  • the advertisement packet of the virtual forwarder is sent, and the virtual forwarding address of the virtual forwarder is advertised, and the corresponding switch port learns the virtual address.
  • the primary routing device redistributes an unfailed user according to the load balancing policy for the user corresponding to the failed primary virtual forwarder.
  • the primary virtual forwarder uses the address resolution response message to feed back the user.
  • the time limit for configuring the virtual address of the standby virtual forwarder to the corresponding switch port is longer than or equal to the preset time.
  • routing device is pre-configured with an active virtual forwarder having a different virtual address, and the plurality of routing devices form a virtual router, and the routing device includes:
  • the first determining module is configured to determine an active routing device according to a priority of a VRRP backup group configured by each routing device of the virtual router;
  • the first allocation module is configured to allocate, according to the load balancing policy, an active virtual forwarder for each user, if the routing device is used as the primary routing device and receives the address resolution request message initiated by multiple users, and The address resolution response message is fed back to the virtual address of the primary virtual forwarder allocated to each user, so that the user can send the user traffic according to the virtual address obtained by the feedback;
  • the learning module is configured to learn the virtual address of the primary virtual forwarder on the other routing device in the virtual router, and establish an alternate virtual forwarder according to the learned virtual address; wherein the primary virtual forwarder of the same virtual address and the standby The virtual forwarder has a corresponding relationship;
  • the monitoring module is configured to perform fault monitoring to the corresponding primary repeater by using the standby virtual forwarder of the routing device;
  • a takeover module configured to: after the monitoring module determines that a primary virtual forwarder of a routing device in the virtual router fails, controlling the activation module to activate the routing device corresponding to the failed primary virtual forwarder
  • the alternate virtual forwarder which takes over the user traffic that the failed primary virtual forwarder is responsible for forwarding.
  • the primary virtual forwarder and the standby virtual forwarder of the same virtual address have respective second priorities
  • the takeover module includes:
  • the campaign sub-module is configured to: when the listening module determines that the primary virtual forwarder of a routing device in the virtual router fails, according to the routing device, corresponding to the standby routing device of the failed primary routing device
  • the second priority is to compete with the active virtual forwarder for the failed routing device to determine a takeover routing device
  • the control submodule is configured to activate the alternate routing device corresponding to the failed primary routing device if the routing device is determined to take over the routing device.
  • the activation module is configured to configure the primary virtual forwarder or the standby of the routing device to the switch port corresponding to the routing device when the active virtual forwarder or the standby virtual forwarder of the routing device is activated.
  • the virtual address of the virtual forwarder is configured to configure the primary virtual forwarder or the standby of the routing device to the switch port corresponding to the routing device when the active virtual forwarder or the standby virtual forwarder of the routing device is activated.
  • the first distribution module is further configured to: if the routing device is used as the primary routing device, when the failed primary virtual forwarder fails to recover within a preset time, according to the load balancing policy, The user corresponding to the failed primary virtual forwarder re-allocates a non-failed active virtual forwarder and re-informs the user through the address resolution response message.
  • the time limit for configuring the virtual address of the standby virtual forwarder to the corresponding switch port is longer than or equal to the preset time.
  • the solution of the embodiment of the present invention can also distribute user traffic to each routing device to be forwarded in the same VRRP group. Therefore, it is not necessary to configure too many gateway addresses.
  • the dynamic load balancing adjustment can be performed by changing the forwarding address assigned to the user. In particular, after a routing device fails, it can continue to allocate other forwarding addresses to the user traffic according to the load balancing policy, that is, It ensures the normal forwarding of user traffic and also enables load balancing of traffic.
  • FIG. 1 is a schematic diagram of steps of a traffic load balancing method according to the present invention.
  • FIG. 2 is a schematic diagram of an existing routing device and a user network structure
  • FIG. 5 are schematic diagrams showing a connection relationship between a virtual repeater of a routing device, a switch port, and a user in the process of implementing the traffic load balancing method of the present invention
  • FIG. 6 is a schematic structural diagram of a routing device according to the present invention.
  • the first solution of the present invention is to dynamically implement load balancing of each routing device based on a VRRP backup group in the virtual router. Second, when any routing device fails in forwarding user traffic, it can also quickly take over.
  • the solution of the present invention provides a traffic load balancing method applied to a virtual router.
  • Each routing device of the virtual router is pre-configured with an active virtual forwarder, and the primary virtual forwarder of each routing device.
  • the virtual addresses are different.
  • the traffic load balancing method includes the following steps:
  • Step 11 Determine a primary routing device according to a first priority of a VRRP backup group configured by each routing device of the virtual router.
  • Step 12 After receiving the address resolution request message initiated by multiple users, the primary routing device allocates an active virtual forwarder to each user according to the load balancing policy, and feeds back the response message to each user through the address resolution response message.
  • the virtual address of the assigned primary virtual forwarder enabling the user to send user traffic according to the virtual address obtained from the feedback.
  • each routing device of the virtual router learns the virtual address of the primary virtual forwarder on the other routing device, and establishes a standby virtual forwarder according to the learned virtual address; wherein, the primary virtual forwarder of the same virtual address and The alternate virtual forwarder has a corresponding relationship;
  • Step 14 Each routing device of the virtual router performs fault monitoring to the corresponding primary forwarder through its standby virtual forwarder;
  • Step 15 After the primary virtual forwarder of a routing device fails, the other routing device activates the standby virtual forwarder corresponding to the failed primary virtual forwarder, thereby taking over the failed primary virtual forwarder.
  • the routing device is a pre-configured primary virtual forwarder to forward user traffic, so that the task of forwarding user traffic can be independent on the routing device, so that the standby router can also violate the VRRP redundancy protocol. Forward user traffic. Therefore, from the perspective of forwarding user traffic, there is no difference between the primary and backup devices between routing devices.
  • the primary routing device can dynamically allocate the corresponding primary virtual forwarder according to the load of the current forwarding user traffic of each routing device, and the balancing effect is better than the prior art.
  • FIG. 1 is a schematic diagram of an existing routing device and a user network structure.
  • the routing devices Router 1, 2, and 3 all have one switch port (port 1, port 2, and port 3 in the figure).
  • Router 1 only corresponds to port 1, and only port 1 is configured with the address of Router 1.
  • Router 2 and Router 3 are the same.
  • Router1 is the primary routing device. When Router1 is not faulty, port 1 is up, port 2 and port 3 are down.
  • the shutdown state is that the configured routing device is not activated.
  • the switch will connect PC1, PC2, and PC3. of User traffic is sent to Router1 through port 1. After Router1 is faulty, if Router2 takes over Router1, port 1 of the switch is shut down and port 2 is opened. The switch sends PC1, PC2, and PC3 to Router2 through port 2.
  • the routing device activates the primary virtual forwarder or the standby virtual forwarder, specifically: the routing device configures its primary virtual forwarder or standby virtual forwarder to its corresponding switch port.
  • Virtual address That is, when a certain virtual forwarder is activated, the routing device configures the virtual forwarder's virtual address to its corresponding switch port, for example, sends a notification message to the corresponding switch port to notify the virtual forwarder of the virtual forwarder.
  • Information including virtual addresses.
  • the switch receives the user traffic, it determines the switch port configured with the destination address of the user traffic according to the prior art, and sends the user traffic to the active or standby virtual corresponding to the uplink routing device according to the determined switch port. On the repeater.
  • the primary virtual forwarder and the standby virtual forwarder of the same virtual address have respective second priorities; that is, the primary virtual forwarder of the same virtual address and the standby virtual forwarder establish the active/standby switchover through the second priority.
  • Election mechanism
  • the other routing devices perform election according to the second priority of the alternate routing device corresponding to the failed primary routing device, and determine a takeover route.
  • the device; the takeover routing device activates its alternate routing device corresponding to the failed primary routing device.
  • the second priority of a virtual forwarder may be that the routing device to which it belongs dynamically quantizes the value according to its current processing capability, so as to ensure that the routing device with more remaining processing resources activates its corresponding standby virtual forwarder. To take over the user traffic of the failed primary routing device.
  • a feasible solution is that the routing device sends the second priority of the configured standby router to other routing devices through its heartbeat message, when the second priority of the locally configured standby virtual forwarder is higher than An alternate virtual forwarder on another routing device of the same virtual address is activated.
  • the virtual address of the primary virtual forwarder 1 that is pre-configured on Router1 is VMAC1
  • the virtual address of the primary virtual forwarder 2 that is pre-configured by Router2 is VMAC2
  • the primary virtual forwarder 3 of Router3 is pre-configured.
  • the virtual address is VMAC3.
  • Router1 learns the virtual addresses VMAC2 and VMAC3 based on the heartbeat packets of Router3 from Router2.
  • the virtual address of one of the standby virtual forwarders is VMAC2 (corresponding to the virtual address of the primary virtual forwarder configured by Router2), and the virtual address of the other standby virtual forwarder is VMAC3 (corresponding to the pre-configured primary virtual forwarding of Router3). Virtual address)
  • the traffic balancing method of the present invention also includes:
  • Step 18 If the failed primary virtual forwarder fails to recover within a preset time, the primary routing device reassigns an unassigned user to the user corresponding to the failed primary virtual forwarder according to the load balancing policy. The faulty active virtual forwarder re-sends the feedback to the user through the address resolution response message.
  • the routing device is time-sensitive for the routing device to configure the virtual address of its standby virtual forwarder to its corresponding switch port, and the duration of the timeliness is greater than or equal to the preset time to ensure the faulty master User traffic that is responsible for using virtual forwarders will not be lost.
  • the takeover router passes the standby virtual machine and listens to the failed primary virtual forwarder to recover within a preset time, the configuration of the switch port can be cancelled, thereby completing the failure.
  • the primary uses the virtual transponder's backcut.
  • the virtual router in this implementation mode includes the primary routing device Router 1 and the standby routing device Router 2 and Router 3 in the VRRP backup group 1.
  • the first priority of VRRP backup group 1 configured on Router 1 is 200.
  • the first priority of VRRP backup group 1 on Router 2 is 180.
  • the first priority of VRRP backup group 1 configured on Router 3 is 160;
  • the port 1 is connected to Router 1 according to the address of Router 1 configured in the same manner as the prior art; and the port 2 is connected to Router 2 according to the configured address of Router 2; Port 3 is connected to Router 3 according to the address of Router 3 configured.
  • the gateways of the users PC1, PC2, and PC3 are configured as the ID address of the VRRP backup group 1.
  • the difference between the two technologies is that the primary virtual forwarder Repeater 2 is pre-configured on Router 1 and the primary virtual forwarder Repeater 2 is pre-configured on Router 2.
  • the primary virtual forwarder Repeater 3 is pre-configured on Router 3.
  • the virtual address of 1 is VMAC1
  • the virtual address of Repeater 2 is VMAC2
  • the virtual address of Repeater 3 is VMAC3.
  • the method includes:
  • Router 1, Router 2, and Router 3 determine the primary routing device based on the first priority of the corresponding VRRP backup group 1. In this implementation mode, Router 1 has the highest priority and serves as the primary routing device.
  • the primary routing device Router 1 is responsible for receiving the address resolution request message initiated by the users PC1, PC2, and PC3;
  • Router 1 sends an advertisement packet to port 1, and port 1 configures the virtual address VMAC1 of Repeater 1.
  • port 2 can configure the virtual address VMAC2 of Repeater 2
  • port 3 configures the virtual address VMAC3 of Repeater 3.
  • Router 1, Router 2, and Router 3 use the virtual forwarders to exchange heartbeat packets periodically.
  • Router1 learns the virtual addresses of Repeater 2 and Repeater 3;
  • Router2 learns the virtual addresses of Repeater1 and Repeater 3;
  • Router3 learns the virtual addresses of Repeater 1 and Repeater 2.
  • Router 1 establishes an alternate virtual repeater Repeater 2' corresponding to Repeater 2 according to the learned VMAC2, and establishes a standby virtual repeater Repeater 3' corresponding to Repeater 3 according to the learned VMAC3; Router 2 establishes an alternate virtual repeater Repeater 1' corresponding to Repeater 1 and an alternate virtual forwarder Repeater 3' corresponding to Repeater 3; Router 3 establishes an alternate virtual repeater Repeater 1' corresponding to Repeater 1, and corresponds to Repeater 2 spare virtual repeater Repeater 2'.
  • Router 1 distributes the traffic of PC1 to Repeater 1 according to the load balancing policy, distributes the traffic of PC2 to Repeater 2, and distributes the traffic of PC3 to Repeater 3.
  • the corresponding packet is parsed by the address, and VMAC1 is fed back to PC1, VMAC2 is fed back to PC1, and VMAC3 is fed back to PC3.
  • PC1 sends VMAC1 as the destination address of its traffic to the switch;
  • PC2 sends VMAC2 as the destination address of its traffic to the switch;
  • PC3 sends VMAC3 as the destination address of its traffic to the switch.
  • the switch determines port 1 according to VMAC1 in the PC1 traffic, and uses port 1 to send PC1 traffic to Repeater 1, and similarly sends PC2 traffic to Repeater 2 through port 2, and sends PC3 traffic to Repeater 3 through port 3. .
  • Router 1 and Router 3 respectively perform fault monitoring to Repeater 2 in Router 2 through their respective Repeater 2'; Router 2 and Router 3 respectively perform fault monitoring to Repeater 1 in Router 1 through their respective Repeater 1'; Router 1 and Router 2 perform fault monitoring to Repeater 3 in Router 3 through their respective Repeater 3'.
  • Router 1 listens through its local Repeater 2' If the heartbeat packet carrying VMAC2 sent by Router 2 is received by Router 2, if Router1 does not receive the heartbeat packet carrying VMAC2 sent by Router 2, it determines that Repeater 2 is faulty.
  • Router 1 fails, causing its Repeater 1 to fail.
  • Router 2 and Router 3 are elected according to their respective Repeater 1'.
  • both Router 2 and Router 3 have the first priority of VRRP group 1 as the second priority of all virtual forwarders.
  • Router 2 is elected to take over the routing device and activate its locally configured Repeater 1'. .
  • Router 2 configures VMAC1 on port 2, so as shown in Figure 5, after receiving the traffic of PC2, the switch determines that the virtual address is configured on port 2 according to the destination address VMAC1 in the PC2 traffic. Send PC2 traffic through port 2 to Repeater 1' in Router 2.
  • Router 2 switches the non-active routing device, and is responsible for receiving subsequent address resolution request packets from PC1, PC2, and PC3.
  • Router 2 allocates Repeater 2 or Repeater 3 to PC1 according to its load balancing with Router 3, and sends feedback to PC1 through address resolution request packets.
  • PC1 changes its traffic.
  • the gateway address (the gateway address is the destination address for sending its own traffic). After that, VMAC1 configured on port 2 is invalid, and the configuration information related to VMAC1 is deleted.
  • Router 2 checks that the Repeater 1 of Listener 1 and Router 1 of Router 1 are restored. Otherwise, the configuration related to VMAC1 on port 2 is cancelled. At the same time, Router 1 and Router 2 can perform the switchback based on the VRRP protocol.
  • routing device is pre-configured with an active virtual forwarder with different virtual addresses, and the plurality of routing devices form a virtual router, as shown in FIG. Routing devices include:
  • the first determining module is configured to determine an active routing device according to a priority of a VRRP backup group configured by each routing device of the virtual router;
  • the first allocation module is configured to allocate, according to the load balancing policy, an active virtual forwarder for each user, if the routing device is used as the primary routing device and receives the address resolution request message initiated by multiple users, and The address resolution response message is fed back to the virtual address of the primary virtual forwarder allocated to each user, so that the user can send the user traffic according to the virtual address obtained by the feedback;
  • the learning module is configured to learn the virtual address of the primary virtual forwarder on the other routing device in the virtual router, and establish an alternate virtual forwarder according to the learned virtual address; wherein the primary virtual forwarder of the same virtual address and the standby The virtual forwarder has a corresponding relationship;
  • the monitoring module is configured to perform fault monitoring to the corresponding primary repeater by using the standby virtual forwarder of the routing device;
  • a takeover module configured to: after the monitoring module determines that a primary virtual forwarder of a routing device in the virtual router fails, controlling the activation module to activate the routing device corresponding to the failed primary virtual forwarder
  • the alternate virtual forwarder which takes over the user traffic that the failed primary virtual forwarder is responsible for forwarding.
  • the primary virtual forwarder and the standby virtual forwarder of the same virtual address have respective second priorities
  • the takeover module includes:
  • the campaign sub-module is configured to: when the listening module determines that the primary virtual forwarder of a routing device in the virtual router fails, according to the routing device, corresponding to the standby routing device of the failed primary routing device
  • the second priority is to compete with the active virtual forwarder for the failed routing device to determine a takeover routing device
  • the control submodule is configured to activate the alternate routing device corresponding to the failed primary routing device if the routing device is determined to take over the routing device.
  • the activation module is configured to configure the primary virtual forwarder or the standby of the routing device to the switch port corresponding to the routing device when the active virtual forwarder or the standby virtual forwarder of the routing device is activated.
  • the virtual address of the virtual forwarder is configured to configure the primary virtual forwarder or the standby of the routing device to the switch port corresponding to the routing device when the active virtual forwarder or the standby virtual forwarder of the routing device is activated.
  • the first distribution module is further configured to: if the routing device is used as the primary routing device, when the failed primary virtual forwarder fails to recover within a preset time, according to the load balancing policy, The user corresponding to the failed primary virtual forwarder re-allocates a non-failed active virtual forwarder and re-informs the user through the address resolution response message.
  • the time limit for configuring the virtual address of the standby virtual forwarder to the corresponding switch port is longer than or equal to the preset time.
  • the routing device of this embodiment can achieve the same technical effect corresponding to the traffic load balancing method provided by the present invention.
  • the traffic load balancing method and the routing device provided by the embodiments of the present invention have the following beneficial effects:
  • the solution of the embodiment of the present invention can balance user traffic under the same VRRP group. Assigned to each routing device for forwarding, so there is no need to configure too many gateway addresses.
  • the dynamic load balancing adjustment can be performed by changing the forwarding address assigned to the user. In particular, after a routing device fails, it can continue to allocate other forwarding addresses to the user traffic according to the load balancing policy, that is, It ensures the normal forwarding of user traffic and also enables load balancing of traffic.

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Abstract

La présente invention concerne un procédé d'équilibrage de charges de trafic et un dispositif de routage. Chaque dispositif de routage d'un routeur virtuel est configuré avec un dispositif de transfert virtuel actif ; un dispositif de routage actif du routeur virtuel dans un groupe de secours VRRP attribue, selon une politique d'équilibrage de charges, à un utilisateur un dispositif de transfert virtuel actif responsable de transférer un trafic d'utilisateur ; en même temps, chaque dispositif de routage apprend des adresses virtuelles de dispositifs de transfert virtuels actifs d'autres dispositifs de routage et établit des dispositifs de transfert virtuels de secours configurés pour surveiller, selon les adresses virtuelles apprises, un dispositif de routage de secours et un dispositif de routage actif de la même adresse virtuelle formant une solution de redondance ; lorsque le dispositif de transfert virtuel actif d'un certain dispositif de routage est défaillant, un autre dispositif de routage active un dispositif de routage de secours local correspondant au dispositif de routage actif défaillant de façon à prendre le contrôle du trafic d'utilisateur. La solution de la présente invention effectue un équilibrage de trafic parmi des dispositifs de routage dans un groupe de secours VRRP.
PCT/CN2015/074423 2014-10-29 2015-03-17 Procédé d'équilibrage de charges de trafic et dispositif de routage WO2016065804A1 (fr)

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US11032734B2 (en) 2015-08-24 2021-06-08 Nokia Solutions And Networks Oy Network congestion control via paging procedures
CN108353320B (zh) * 2015-08-24 2021-12-07 诺基亚通信公司 经由寻呼过程的网络拥塞控制
CN107888492A (zh) * 2017-10-16 2018-04-06 闽南师范大学 一种vrrp负载均衡的方法和装置
CN107888492B (zh) * 2017-10-16 2020-07-24 闽南师范大学 一种vrrp负载均衡的方法和装置

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