Dell C9010 Modular Chassis Switch EMC Networking Command-Line Reference Guide - Page 1459

hello-time Set the time interval between the generation of the RSTP bridge protocol data units (BPDUs). C9000 Series Syntax Parameters hello-time [milli-second] seconds To return to the default value, use the no hello-time command. seconds milli-second Enter a number as the time interval between transmission of BPDUs. The range is from 1 to 10 seconds. The default is 2 seconds. Enter the keywords milli-second to configure a hello time on the order of milliseconds. The range is from 50 to 950 milliseconds Defaults 2 seconds Command Modes CONFIGURATION RSTP (conf-rstp) Command History This guide is platform-specific. For command information about other platforms, refer to the relevant Dell Networking OS Command Line Reference Guide. The following is a list of the Dell Networking OS version history for this command. Version Description 9.9(0.0) 9.2(1.0) 8.3.19.0 8.3.11.1 8.3.7.0 8.3.1.0 7.6.1.0 7.5.1.0 6.2.1.1 Introduced on the C9010. Introduced on the Z9500. Introduced on the S4820T. Introduced on the Z9000. Introduced on the S4810. Added the milli-second option to the S-Series. Introduced on the S-Series. Introduced on the C-Series. Introduced on the E-Series. Usage Information Related Commands The hello time is encoded in BPDUs in increments of 1/256ths of a second. The standard minimum hello time in seconds is 1 second, which is encoded as 256. Millisecond hello times are encoded using values less than 256; the millisecond hello time equals (x/1000)*256. When you configure millisecond hellos, the default hello interval of 2 seconds is still used for edge ports; the millisecond hello interval is not used. forward-delay - changes the wait time before RSTP transitions to the Forwarding state. max-age - changes the wait time before RSTP refreshes the protocol configuration information. max-age To maintain configuration information before refreshing that information, set the time interval for the RSTP bridge. C9000 Series Syntax max-age seconds Rapid Spanning Tree Protocol (RSTP) 1459