3Com 8807 Configuration Manual page 148

148 C 17: MSTP R
HAPTER
c
c
-
EGION CONFIGURATION
operation till the specified interval is reached. This can avoid frequent delete
operations on the MAC address table and ARP table.
You can use the following command to configure the protection functions of the
switch.
Perform the following configuration in corresponding configuration modes.
Table 131 Configure the switch protection function
Operation
Configure BPDU protection of the switch
(from system view)
Restore the disabled BPDU protection state as
defaulted (from system view)
Configure Root protection of the switch (from
system view)
Restore the disabled Root protection state as
defaulted (from system view)
Configure Root protection of the switch (from
Ethernet port view)
Restore the disabled Root protection state as
defaulted (from Ethernet port view)
Configure loop protection function of the
switch (from Ethernet port view)
Restore the disabled loop protection state, as
defaulted (from Ethernet port view)
Enable the loop protection function of the
switch (from system view)
Restore the disabled loop protection state, as
defaulted (from system view)
Configure TC protection of the switch (from
system view)
Disable TC protection (from system view)
CAUTION: If the equipment connected to the port of the switch cannot send STP
packets to the switch, do not configure the loop-protection command.
Otherwise, the port may be congested for a long time.
CAUTION: For a port that fails to receive the BPDU packets from the opposite
peer, there are several situations:
If you are not sure that STP is enabled on the opposite peer, it is not
■
recommended to carry out the stp loop-protection command on this port.
If the port is a root port or an alternate port, you can carry out the stp
■
loop-protection command.
The port is a designated port on a domain border and the stp loop-protection
■
command is carried out on this port. If the number of instances on this port is
greater than that on the opposite peer port, the port state on another instance
and the port state on instance 0 are the same.
Carry out the stp loop-protection command on the designated upstream
■
port. If the downstream port does not contain the VLAN of the designated
Command
stp bpdu-protection
undo stp bpdu-protection
stp interface interface-list root-protection
undo stp interface interface-list
root-protection
stp root-protection
undo stp root-protection
stp loop-protection
stp loop-protection
stp interface interface-list loop-protection
undo stp interface interface-list
loop-protection
stp tc-protection enable
stp tc-protection disable