Method, device, and system for dual-uplink tangent ring convergence

摘要

A method, device, and system for dual-uplink tangent ring convergence, where ports on a network device are classified into conjugate ports and non-conjugate ports. When receiving an entry update packet from a first port or perceiving a state change of a first port, when it is determined that the first port of the network device is a conjugate port, the network device clears a media access control (MAC) entry and an Address Resolution Protocol (ARP) entry that use the first port as an outbound interface and clears all MAC entries that use a non-conjugate port as an outbound interface, in a MAC table and an ARP table of the network device. In this way, traffic interruption can be avoided, wherein a failure of one dual-uplink tangent ring does not cause an entry of one or more other normal dual-uplink tangent rings to be cleared/updated.

主权项

1. A method for dual-uplink tangent ring convergence, the method comprising:
receiving, by a first network device, an entry update packet from a first port of the first network device, or perceiving that a state of a first port of the first network device changes; clearing all entries that are in a media access control (MAC) table and an Address Resolution Protocol (ARP) table of the first network device and use the first port of the first network device as an outbound interface when the first port of the first network device is a conjugate port; clearing all MAC entries that are in the MAC table of the first network device and use a non-conjugate port of the first network device as an outbound interface; and initiating, on the first port and all non-conjugate ports of the first network device, ARP requests for all ARP entries that are in the ARP table of the first network device and use the non-conjugate port of the first network device as an outbound interface, wherein the conjugate port is an access-side port of the first network device, wherein one or more downstream devices are dual-linked to the first network device and a second network device, and wherein links to the first network device and the second network device form one or more dual-uplink tangent rings.