HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 2 - LAN Switching Co - Page 131

Parameters None Description Use stp tc-snooping to enable topology change (TC) snooping. Use undo stp tc-snooping to disable TC snooping. By default, TC snooping disabled. TC snooping and STP are mutually exclusive. Before enabling TC snooping, first disable STP globally. TC snooping does not take effect on the ports on which BPDU tunneling is enabled for STP. For more information about BPDU tunneling, see Layer 2-LAN Switching Configuration Guide. Related commands: stp enable. Examples # Enable TC snooping globally. system-view [Sysname] undo stp enable [Sysname] stp tc-snooping stp timer forward-delay Syntax stp timer forward-delay time View undo stp timer forward-delay System view Default level 2: System level Parameters time: Sets the forward delay in 0.01 seconds, in the range of 400 to 3000 in increments of 100 (as in 400, 500, 600). Description Use stp timer forward-delay to set the forward delay timer of the device. Use undo stp timer forward-delay to restore the default. By default, the forward delay timer is 15 seconds. The forward delay timer determines the time interval of state transition. To prevent temporary loops, a spanning tree port goes through the learning (intermediate) state before it transitions from the discarding to the forwarding state. To stay synchronized with the remote device, the port has a wait period between transition states that is determined by the forward delay timer. HP does not recommend that you set the forward delay with this command. Instead, you can specify the network diameter of the switched network by using the stp bridge-diameter command and let spanning tree protocols automatically calculate optimal settings of the forward delay timer. If the network diameter uses the default value, the forward delay timer also uses the default value. 123