Cabletron Systems FN10 Reference Manual

Also see for Fast Network 10: User guide Quick setup guide

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Spanning Tree GroupFast Network 10 MIB Reference GuidePage 4-5dot1dStpHoldTime {dot1dStp 10}Integer Read-OnlyThis time value determines the interval length during which no more than twoConfiguration bridge PDUs shall be transmitted by this node, in units ofhundredths of a second.dot1dStpForwardDelay {dot1dStp 11}Integer Read-OnlyThis time value, measured in units of hundredths of a second, controls how fast aport changes its spanning state when moving towards the Forwarding state. Thevalue determines how long the port stays in a particular state before moving tothe next state. For example, how long a port stays in the Listening state whenmoving from Blocking to Learning. This value is also used, when a topologychange has been detected and is underway, to age all dynamic entries in theForwarding Database. [Note that this value is the one that this bridge is currentlyusing, in contrast to dot1dStpBridgeForwardDelay which is the value that thisbridge and all others would start using if/when this bridge were to become theroot.]dot1dStpBridgeMaxAge {dot1dStp 12}Time Ticks Read-WriteThe value that all bridges use for MaxAge when this bridge is acting as the root.Note that 802.1d/D9 specifies that the range for this parameter is related to thevalue of dot1dStpBridgeHelloTime. The granularity of this timer is specified by802.1d/D9 to be 1 second. An agent may return a badValue error if a set isattempted to a value which is not a whole number of seconds.The Max Age Time must be at least 6 seconds, and must adhere to the followingequations involving Max Age Time, Forward Delay Time, and Hello Time:2 x (Forward Delay Time - 1) >= Max Age TimeMax Age >= 2 x (Hello Time + 1)dot1dStpBridgeHelloTime {dot1dStp 13}Time Ticks Read-WriteThe value that all bridges use for HelloTime when this bridge is acting as theroot. The granularity of this timer is specified by 802.1d/D9 to be 1 second. Anagent may return a badValue error if a set is attempted to a value which is not awhole number of seconds.The Hello Time must adhere to the equation described in the variabledot1dStpBridgeMaxAge, involving Max Age Time and Hello Time.