Users Guide

Table 86. STP Default Values
STP Parameters Default Value
Forward Delay 15 seconds
Hello Time 2 seconds
Max Age 20 seconds
Port Cost
• 100-Mb/s Ethernet interfaces
• 1-Gigabit Ethernet interfaces
• 10-Gigabit Ethernet interfaces
• 25-Gigabit Ethernet interfaces
• 40-Gigabit Ethernet interfaces
• 50-Gigabit Ethernet interfaces
• 100-Gigabit Ethernet interfaces
• Port Channel with 100 Mb/s Ethernet interfaces
• Port Channel with 1-Gigabit Ethernet interfaces
• Port Channel with 10-Gigabit Ethernet interfaces
• Port Channel with 40-Gigabit Ethernet interfaces
• Port Channel with 25-Gigabit Ethernet interfaces
• Port Channel with 50-Gigabit Ethernet interfaces
• Port Channel with 100-Gigabit Ethernet interfaces
• 200000
• 20000
• 2000
• 1700
• 1400
• 1200
• 200
• 180000
• 18000
• 1800
• 600
• 1200
• 200
• 180
Port Priority 8
• Change the forward-delay parameter (the wait time before the interface enters the Forwarding state).
PROTOCOL SPANNING TREE mode
forward-delay seconds
The range is from 4 to 30.
The default is 15 seconds.
• Change the hello-time parameter (the BPDU transmission interval).
PROTOCOL SPANNING TREE mode
hello-time seconds
NOTE
: With large congurations (especially those with more ports) Dell Networking recommends increasing the hello-
time.
The range is from 1 to 10.
the default is 2 seconds.
• Change the max-age parameter (the refresh interval for conguration information that is generated by recomputing the spanning tree
topology).
PROTOCOL SPANNING TREE mode
max-age seconds
The range is from 6 to 40.
The default is 20 seconds.
790
Spanning Tree Protocol (STP)