Command Manual (For Soliton) – MSTPH3C S3100 Series Ethernet Switches Chapter 1 MSTP Configuration Commands1-38The larger the packetnum argument is, the more packets a port can transmit in eachhello time, while the more switch resources are occupied. Configure the packetnumargument to a proper value to limit the number of BPDUs a port can send in each hellotime to prevent MSTP from occupying too much bandwidth resources when networktopology jitter occur.Related commands: stp transmit-limit.Examples# Set the maximum transmitting speed of Ethernet 1/0/3 to 15. system-viewSystem View: return to User View with Ctrl+Z.[Sysname] stp interface Ethernet 1/0/3 transmit-limit 151.1.33 stp loop-protectionSyntaxstp loop-protectionundo stp loop-protectionViewEthernet port viewParametersNoneDescriptionUse the stp loop-protection command to enable the loop guard function on thecurrent port.Use the undo stp loop-protection command to restore the loop guard function to thedefault state on the current port.By default, the loop guard function is disabled.A switch maintains the states of the root port and other blocked ports by receiving andprocessing BPDUs from the upstream switch. These BPDUs may get lost because ofnetwork congestion or unidirectional link failures. If a switch does not receive BPDUsfrom the upstream switch for a certain period, the switch selects a new root port; theoriginal root port becomes a designated port; and the blocked ports turn to theforwarding state. This may cause loops in the network.The loop guard function suppresses loops. With this function enabled, if linkcongestions or unidirectional link failures happen, a root port becomes a designatedport, and the port turns to the discarding state. The blocked port also becomes the
