Method for multicast data uninterrupted repeat

Abstract

The present invention discloses a multicasting data no-break transmitting method, referring to computer network communication technology field. It contains when non-root bridge three-layer equipment protocol root port switching, non-root bridge three-layer equipment configuring new root port as multicasting transmitting port, and through new root port transmitting neighbor finding protocol message to root bridge three-layer equipment appointed port, root bridge three-layer equipment receiving neighbor finding protocol message configuring appointed port multicasting transmitting port, through said appointed port responding neighbor finding protocol message to new root port, non-root bridge three-layer equipment receiving root bridge three-layer equipment responded neighbor finding protocol message, continue transmitting link establishment and multicasting data between new root port and said appointed port through said link. The present invented method can shorten multicasting retransmission blockage time interval duo to root port switching, to make time interval dropping to 10 millisecond level, satisfying multicasting service real time requirement, and raising multicasting retransmission efficiency.

Description

[technical field]

[0001] The invention relates to the technical field of computer network communication, in particular to a method for maintaining uninterrupted forwarding of multicast data. [Background technique]

[0002] Such as figure 1 As shown, it is a basic structural diagram of a computer communication network. User traffic is connected to a layer-3 switch through the access network, and multiple layer-3 switches converge the traffic to the upper-level layer-3 switch (as shown in the dotted line box in the figure). Through the aggregation function of the three-layer switch, the user's traffic is finally sent to the Internet service provider through the core network, and the service provided by the Internet service provider for the user is transmitted to the user in the opposite direction, thereby realizing the end-to-end connection of the service. Among them, the connection of these three-layer switches forms the aggregation network of the access layer. Generally spe...

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