Command Manual (For Soliton) – MSTP
H3C S3100 Series Ethernet Switches
Chapter 1 MSTP Configuration Commands
1-55
operation for limited times (up to six times by default) regardless of the number of the
TC-BPDUs it receives. Such a mechanism prevents a switch from being busy in
removing the MAC address table and ARP entries.
You can use the
stp tc-protection threshold
command to set the maximum times for a
switch to remove the MAC address table and ARP entries in a specific period. When
the number of the TC-BPDUs received within a period is less than the maximum times,
the switch performs a removing operation upon receiving a TC-BPDU. After the number
of the TC-BPDUs received reaches the maximum times, the switch stops performing
the removing operation. For example, if you set the maximum times for a switch to
remove the MAC address table and ARP entries to 100 and the switch receives 200
TC-BPDUs in the period, the switch removes the MAC address table and ARP entries
for only 100 times within the period.
Examples
# Set the maximum times for a switch to remove the MAC address table and ARP
entries within 10 seconds to 5.
<Sysname>system-view
System View: return to User View with Ctrl+Z.
[Sysname] stp tc-protection threshold 5
1.1.50 stp timer forward-delay
Syntax
stp timer forward-delay
centi-seconds
undo stp
timer forward-delay
View
System view
Parameters
centi-seconds
: Forward delay in centiseconds to be set. This argument ranges from
400 to 3,000.
Description
Use the
stp timer forward-delay
command to set the forward delay of the switch.
Use the
undo stp timer forward-delay
command to restore the forward delay to the
default value.
By default, the forward delay of the switch is 1,500 centiseconds.
To prevent the occurrence of temporary loops, when a port changes its state from
discarding to forwarding, it undergoes an intermediate state and waits for a specific
