HP AP775A Cisco Nexus 5000 Series Switch CLI Software Configuration Guide (OL- - Page 239

Configuring MST Configuring the Hello Time Configuring the Hello Time You can configure the interval between the generation of configuration messages by the root bridge for all instances on the switch by changing the hello time. Note Exercise care when using this command. For most situations, we recommend that you enter the spanning-tree mst instance-id root primary and the spanning-tree mst instance-id root secondary configuration commands to modify the hello time. Procedure Step 1 Step 2 Command or Action switch# configure terminal Purpose Enters configuration mode. switch(config)# spanning-tree mst Configures the hello time for all MST instances. The hello hello-time seconds time is the interval between the generation of configuration messages by the root bridge. These messages mean that the switch is alive. For seconds, the range is from 1 to 10, and the default is 2 seconds. This example shows how to configure the hello time of the switch to 1 second: switch# configure terminal switch(config)# spanning-tree mst hello-time 1 Configuring the Forwarding-Delay Time You can set the forward delay timer for all MST instances on the switch with one command. Procedure Step 1 Step 2 Command or Action switch# configure terminal Purpose Enters configuration mode. switch(config)# spanning-tree mst Configures the forward time for all MST instances. The forward-time seconds forward delay is the number of seconds that a port waits before changing from its spanning tree blocking and learning states to the forwarding state. For seconds, the range is from 4 to 30, and the default is 15 seconds. This example shows how to configure the forward-delay time of the switch to 10 seconds: switch# configure terminal switch(config)# spanning-tree mst forward-time 10 OL-16597-01 Cisco Nexus 5000 Series Switch CLI Software Configuration Guide 193