A method for dual-uplink tangent ring convergence, wherein multiple downstream devices are dual-linked to a first network device and a second network device, and together with a link between the first network device and the second network device they form multiple dual-uplink tangent rings, the link between the first network device and the second network device forms a common tangent edge of the multiple dual-uplink tangent rings, and the method comprises: receiving, by the 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; characterized in that: if it is determined that the first port of the first network device is a conjugate port, clearing all MAC entries and ARP entries that use the first port of the first network device as an outbound interface and clearing all MAC entries that use a non-conjugate port of the first network device as an outbound interface, in a media access control, MAC, table and an Address Resolution Protocol, ARP, table of the first network device; if it is determined that the first port of the first network device is a non-conjugate port, discarding the entry update packet, or performing no processing on the state change of the first port; wherein a conjugate port is a port on the multiple dual-uplink tangent rings and an access-side port of the first network device; a non-conjugate ports is a port on the common tangent edge of the multiple dual-uplink tangent rings. receiving, by the 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; characterized in that: if it is determined that the first port of the first network device is a conjugate port, clearing all MAC entries and ARP entries that use the first port of the first network device as an outbound interface and clearing all MAC entries that use a non-conjugate port of the first network device as an outbound interface, in a media access control, MAC, table and an Address Resolution Protocol, ARP, table of the first network device; if it is determined that the first port of the first network device is a non-conjugate port, discarding the entry update packet, or performing no processing on the state change of the first port; wherein a conjugate port is a port on the multiple dual-uplink tangent rings and an access-side port of the first network device; a non-conjugate ports is a port on the common tangent edge of the multiple dual-uplink tangent rings. if it is determined that the first port of the first network device is a conjugate port, clearing all MAC entries and ARP entries that use the first port of the first network device as an outbound interface and clearing all MAC entries that use a non-conjugate port of the first network device as an outbound interface, in a media access control, MAC, table and an Address Resolution Protocol, ARP, table of the first network device; if it is determined that the first port of the first network device is a non-conjugate port, discarding the entry update packet, or performing no processing on the state change of the first port; wherein a conjugate port is a port on the multiple dual-uplink tangent rings and an access-side port of the first network device; a non-conjugate ports is a port on the common tangent edge of the multiple dual-uplink tangent rings.