Three-layer network device and route distribution method of same

Abstract

The invention provides a three-layer network device and a route distribution method of the same. In the method, when a VRRP (Virtual Router Redundancy Protocol) backup group on the three-layer network device needs to distribute a route outwards, if anyone state of the three-layer network device in the VRRP backup group is a primary state, the three-layer network device can distribute a network section route of an interface in which the three-layer network device is located; if the states of the three-layer network device in the VRRP backup group are all backup states, the three-layer network device does not distribute the network section route of the interface in which the three-layer network device is located; and because a backup three-layer network device does not distribute the route outwards, no downlink data exist in the backup three-layer network device, the master three-layer network device only forwards or processes the downlink data, and thus, the uplink data and the downlink data are forwarded or processed asymmetrically.

Description

technical field [0001] The invention relates to routing technology, in particular to a method for publishing routes of three-layer network equipment and three-layer network equipment. Background technique [0002] Virtual Router Redundancy Protocol (VRRP for short) combines several layer-3 network devices (such as routers) to form a virtual layer-3 network device, and uses a certain mechanism to ensure that it is the master layer-3 network device. When a network device fails, the business will be switched to the backup (Backup) layer-3 network device in time, so as to maintain the continuity and reliability of communication. In the network architecture based on VRRP, for the uplink data, the uplink data is forwarded or processed by the main Layer 3 network device. [0003] However, for downlink data, since both the active layer 3 network device and the backup layer 3 network device will publish routing information to the network side layer 3 network device, the route learne...

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Problems solved by technology

[0003] However, for downlink data, since both the active layer 3 network device and the backup layer 3 network device will publish routing information to the network side layer 3 network device, the route learned by the network side layer 3 network device may point to the active layer 3 network device. Layer 3 network equipment, or may also point to the backup Layer 3 network equipment, resulting in the possibility that the downlink data may be forwarded or processed by the active Layer 3 network equipment, or the downlink data may be forwarded or processed by the standby Layer 3 network equipment Phenomenon occurs, resulting in asymmetric forwarding or processing of uplink data and downlink data

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