![]() ![]() End with CNTL/ZĬost Change an interface's spanning tree path cost Notice that the cost associated with a port can range between 6, while the priority of a port can be set to any number between 0 and 255.Įnter configuration commands, one per line. The cost or priority of a switch interface is changed using the spantree command from interface configuration mode. These settings can all be changed from their default values if required. ![]() In earlier articles we examined some of the default settings relating to the Spanning Tree Protocol, including bridge priorities, port costs, and port priorities. In fact, one instance of Spanning Tree is enabled for each and every VLAN. STP is enabled on Catalyst 1900 series switches by default. The purpose of the Spanning Tree Protocol (STP) is to prevent loops on a switched or bridged network.
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