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90 CHAPTER 14: MSTP CONFIGURATION GUIDE
[3Com] interface Ethernet 1/0/1
[3Com-Ethernet1/0/1] stp config-digest-snooping
# Enable rapid transition on the root port Ethernet 1/0/1.
[3Com-Ethernet1/0/1] stp no-agreement-check
[3Com-Ethernet1/0/1] quit
2 Configuration on Switch C
# Enable MSTP.
<3Com> system-view
[3Com] stp enable
# Set the priority of Switch C to 8192.
[3Com] stp priority 8192
# Enable digest snooping on Switch C.
[3Com] stp config-digest-snooping
# Enable digest snooping on the root port Ethernet 1/0/2.
[3Com] interface Ethernet 1/0/2
[3Com-Ethernet1/0/2] stp config-digest-snooping
[3Com-Ethernet1/0/2] quit
# Enable rapid transition on Ethernet 1/0/1.
[3Com] interface Ethernet 1/0/1
[3Com-Ethernet1/0/1] stp no-agreement-check
[3Com-Ethernet1/0/1] quit
n
■ The rapid transition feature can be enabled only on root ports or alternate
ports.
■ You can enable rapid transition on a designated port, but the configuration
cannot take effect on the port.
Complete Configuration
1 Configuration on Switch B
#
stp enable
stp instance 0 priority 4096
stp config-digest-snooping
#
interface Ethernet1/0/1
stp config-digest-snooping
stp no-agreement-check
#
2 Configuration on Switch C
#
stp enable
stp instance 0 priority 8192