Two-layer network loop detection and positioning method
A loop detection and positioning method technology, applied in the field of communications, can solve the problems of occupying network bandwidth, network paralysis, and less consideration of positioning loops and automatically breaking loops, to achieve the effect of reducing forwarding pressure
Pending Publication Date: 2022-04-22
芯河半导体科技(无锡)有限公司
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Problems solved by technology
[0002] Loops in the Layer 2 network will cause forwarding devices to repeatedly send broadcast, multicast, and unknown unicast packets, occupying a large amount of network bandwidth, resulting in waste of network resources and even network paralysis
In order to detect loops in the Layer 2 network in time and avoid serious impact on the entire network, it is necessary to provide a loop detection technology, and the common one is the Spanning Tree Protocol, which turns the ring network into an acyclic network through a certain algorithm. tree network, so as to avoid repeated sending of packets in the network, but the spanning tree protocol cannot be deployed on switch devices with low CPU performance requirements and no protocol
In addition to the Spanning Tree Protocol, although other existing loop detection technologies can detect loops, they rarely consider how to locate the loop point of the loop and automatically break the loop, and do not consider the forwarding of the multi-chip How to perform detection on the device, and how to reduce the number of forwarding detection packets to reduce network bandwidth consumption
Method used
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Embodiment 1
[0047] A two-layer network loop detection and positioning method, the specific implementation steps are as follows:
[0048] Step 1: Send a private loop detection message
[0049] When the loop detection function is enabled, forwarding devices such as switches need to randomly wait for different times according to the priority, and then start the sending timer of the private detection message. loop detection packets, and send the packets to the hardware to forward them to the network.
[0050] The format of the private detection message designed by this method is attached figure 2 , see the attachment for the message format carrying the vlan tag image 3 , wherein, the TPID (tag protocol ID, label protocol identification) field is determined as a private loop detection message, and the PRIVATE_ATTRIBUTE field includes the chip id (tx_mod_id) to which the sending port belongs, the sending port type (tx_port_type), the sending port id (tx_port_id) and The total number of forwa...
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The invention relates to the technical field of communication, in particular to a two-layer network loop detection and positioning method, which comprises the following steps of: periodically sending a private loop detection message, judging a loop according to sending port information and SMAC in the private loop detection message, and blocking a flow, the method not only supports the positioning of the ring forming point and the blocking of the loop on the multi-chip forwarding equipment, but also can reduce the forwarding pressure of the detection message on the whole network.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a layer-2 network loop detection and positioning method. Background technique [0002] Loops in the Layer 2 network will cause forwarding devices to repeatedly send broadcast, multicast, and unknown unicast packets, occupying a large amount of network bandwidth, causing waste of network resources and even network paralysis. In order to detect loops in the Layer 2 network in time and avoid serious impact on the entire network, it is necessary to provide a loop detection technology, and the common one is the Spanning Tree Protocol, which turns the ring network into an acyclic network through a certain algorithm. A tree-shaped network can avoid repeated sending of packets in the network, but the spanning tree protocol cannot be deployed on switch devices that have low requirements on CPU performance and have no protocol. In addition to the Spanning Tree Protocol, although oth...
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Login to View More IPC IPC(8): H04L43/04H04L43/08
CPCH04L43/08H04L43/04
Inventor 武斌
Owner 芯河半导体科技(无锡)有限公司