HP StorageWorks 4/64 Brocade Converged Enhanced Ethernet Administrator's Guide - Page 86
Specifying the MSTP hello time, Specifying restrictions for an MSTP instance, setting see
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5 Configuring STP, RSTP, or MSTP on CEE interface ports Guard root protects the root bridge from malicious attacks and unintentional misconfigurations where a bridge device that is not intended to be the root bridge becomes the root bridge. This causes severe bottlenecks in the data path. Guard root ensures that the port on which it is enabled is a designated port. If the guard root-enabled port receives a superior BPDU, it goes to a discarding state. To enable the guard root on a CEE interface, perform the following steps from Privileged EXEC mode. 1. Enter the configure terminal command to enter global configuration mode. 2. Enter the interface command to specify the CEE interface type and slot/port number. switch(config)#interface tengigabitethernet 0/1 3. Enter the no shutdown command to enable the CEE interface. 4. Enter the spanning-tree command to enable the guard root on a CEE interface. switch(conf-if-te-0/1)#spanning-tree guard root Specifying the MSTP hello time From the CEE interface, use this command to set the time interval between BPDUs sent by the root switch. Changing the hello-time affects all spanning tree instances. The max-age setting must be greater than the hello-time setting (see "Specifying the bridge maximum aging time" on page 59). The range is 1 through 10 seconds. The default is 2 seconds. To specify the MSTP hello time on a CEE interface, perform the following steps from Privileged EXEC mode. 1. Enter the configure terminal command to enter global configuration mode. 2. Enter the interface command to specify the CEE interface type and slot/port number. switch(config)#interface tengigabitethernet 0/1 3. Enter the no shutdown command to enable the CEE interface. 4. Enter the spanning-tree command to specify the hello time on a CEE interface. switch(conf-if-te-0/1)#spanning-tree hello-time 5 Specifying restrictions for an MSTP instance From the CEE interface, use this command to specify restrictions on the interface for an MSTP instance. To specify restrictions for an MSTP instance on a CEE interface, perform the following steps. 1. Enter the configure terminal command to enter global configuration mode from Privileged EXEC mode. 2. Enter the interface command to specify the CEE interface type and slot/port number. switch(config)#interface tengigabitethernet 0/1 3. Enter the no shutdown command to enable the CEE interface. 66 Converged Enhanced Ethernet Administrator's Guide 53-1001346-01