xstInstanceCfgBridgeForwardDelay — Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community), Edgecore official enterprise switch MIBs, Edgecore MIB copies (Observium Community)
For RST or MST protocol, the time (in hundredths of a second) that all bridges use for ForwardDelay when this bridge is acting as the root. Note that 802.1D-1990 specifies that the range for this parameter is related to the value of xstInstanceCfgBridgeMaxAge. The granularity of this timer is specified by 802.1D-1990 to be 1 second.