3Com 5500 Switch User Manual


 
86 CHAPTER 14: MSTP CONFIGURATION GUIDE
# Configure Switch C and Switch B to back up each other, and set the bridge
priority of Switch B to 4096.
[3Com] stp priority 4096
# Enable the root guard function on each designated port.
[3Com] interface Ethernet 1/0/4
[3Com-Ethernet1/0/4] stp root-protection
[3Com-Ethernet1/0/4] quit
[3Com] interface Ethernet 1/0/5
[3Com-Ethernet1/0/5] stp root-protection
[3Com-Ethernet1/0/5] quit
[3Com] interface Ethernet 1/0/6
[3Com-Ethernet1/0/6] stp root-protection
[3Com-Ethernet1/0/6] quit
# Adopt the default MSTP operation mode, time-related parameters, and port
parameters.
3 Configuration on Switch C
# Enable MSTP.
<3Com> system-view
[3Com] stp enable
# Enabling MSTP globally on the switch enables RSTP on all the ports. Disable
MSTP on the ports that are not involved in RSTP calculation, for example Ethernet
1/0/8.
[3Com] interface Ethernet 1/0/8
[3Com-Ethernet1/0/8] stp disable
[3Com-Ethernet1/0/8] quit
# Configure Switch C and Switch B to back up each other, and set the bridge
priority of Switch C to 8192.
[3Com] stp priority 8192
# Enable the root guard function on each designated port.
[3Com] interface Ethernet 1/0/1
[3Com-Ethernet1/0/1] stp root-protection
[3Com-Ethernet1/0/1] quit
[3Com] interface Ethernet 1/0/2
[3Com-Ethernet1/0/2] stp root-protection
[3Com-Ethernet1/0/2] quit
[3Com] interface Ethernet 1/0/3
[3Com-Ethernet1/0/3] stp root-protection
[3Com-Ethernet1/0/3] quit
# Adopt the default MSTP operation mode, time-related parameters, and port
parameters.
4 Configuration on Switch D