7.6.1.0 - Force10 Networks

To change these parameters, use the following commands, on the root bridge:
Task Command Syntax Command Mode
Change the forward-delay parameter.
• Range: 4 to 30
• Default: 15 seconds
Change the hello-time parameter.
Note: With large configurations (especially those with more
ports) Force10 Networks recommends that you increase the
hello-time.
Range: 1 to 10
Default: 2 seconds
Change the max-age parameter.
Range: 6 to 40
Default: 20 seconds
View the current values for global parameters using the show spanning-tree rstp command from EXEC
privilege mode. See Figure 272.
Modifying Interface Parameters
On interfaces in Layer 2 mode, you can set the port cost and port priority values.
• Port cost is a value that is based on the interface type. The default values are listed in Table 34. The
greater the port cost, the less likely the port will be selected to be a forwarding port.
• Port priority influences the likelyhood that a port will be selected to be a forwarding port in case that
several ports have the same port cost.
To change the port cost or priority of an interface, use the following commands:
forward-delay seconds PROTOCOL
SPANNING TREE
RSTP
hello-time seconds PROTOCOL
SPANNING TREE
RSTP
max-age seconds PROTOCOL
SPANNING TREE
RSTP
Task Command Syntax Command Mode
Change the port cost of an interface.
Range: 0 to 65535
Default: see Table 34.
Change the port priority of an interface.
Range: 0 to 15
Default: 8
spanning-tree rstp cost cost INTERFACE
spanning-tree rstp priority priority-value INTERFACE
View the current values for interface parameters using the show spanning-tree rstp command from EXEC
privilege mode. See Figure 272.
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