Displaying And Debugging Rstp - 3Com 7700 Configuration Manual

Table 16 Configure the Switch Security Function
Operation
Configure switch loop
protection function (from
Ethernet port view)
Restore the disabled loop
protection state, as defaulted
(from Ethernet port view)
After being configured with BPDU protection, the switch disables the edge port
through RSTP, which receives a BPDU, and notifies the network manager at same
time. Only the network manager can resume these.
The port configured with root protection only plays a role of a designated port.
Whenever this port receives a higher-priority BPDU when it is about to turn into a
non-designated port, it is set to a listening state and not forward packets any
more (as if the link to the port is disconnected). If the port has not received any
higher-priority BPDU for a certain period of time thereafter, it resumes the normal
state.
When configuring a port, only one configuration can be effective among loop
protection, root protection and edge port configuration at the same moment.
By default, the switch does not enable loop protection, BPDU protection or root
protection.
For more information about the configuration commands, refer to the "3Com
Command Reference Guide".
Displaying and After configuring RSTP, execute the display command in all views to display the
Debugging RSTP running of the RSTP configuration, and to verify the effect of the configuration.
Execute the reset command in user view to clear the statistics of the RSTP module.
Execute the debugging command in user view to debug the RSTP module.
Table 17 Display and Debug RSTP
Operation
Display RSTP configuration
information about the local switch
and the specified ports
Clear RSTP statistics information
Enable RSTP (error/event/packet)
debugging
Disable RSTP debugging
In the following scenario, Switch C serves as a standby for Switch B and forwards
Example: Configuring
RSTP
data when a fault occurs on Switch B. They are connected to each other with two
links, so that in case one of the links fails, the other can still work normally. Switch
D through Switch F are directly connected with the downstream users' computers
and they are connected to Switch C and Switch B with uplink ports.
You can configure RSTP on the Switch B through Switch F to meet these
requirements.
Implementing STP on the Switch 7700
Command
stp loop-protection
stp loop-protection
Command
display stp [ interface interface-list ]
reset stp [ interface interface-list ]
debugging stp { error | event | packet }
undo debugging stp { error | event | packet }
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