H3C S7500 Series Ethernet Switches Command Manual

Command Manual – MSTP
H3C S7500 Series Ethernet Switches Chapter 1
MSTP Configuration Commands
1-31
By default, a switch operates in MSTP mode.
To make a switch compatible with STP/RSTP, MSTP provides following three operation
modes:
z STP-compatible mode, where a switch sends out STP BPDU packets
z RSTP-compatible mode, where a switch sends out RSTP BPDU packets
z MSTP mode, where a switch sends out MSTP BPDU packets
Related commands: stp mcheck, stp, stp interface, stp interface mcheck.
Examples
# Configure the switch to operate in STP-compatible mode.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] stp mode stp
1.1.30 stp no-agreement-check
Syntax
stp no-agreement-check
undo stp no-agreement-check
View
Ethernet port view
Parameters
None
Description
Use the stp no-agreement-check command to enable the rapid transition function for
a port.
Use the stp no-agreement-check command to disable the rapid transition function.
By default, the rapid transition function is disabled on a port.
Some other vendors' switches adopt proprietary spanning tree protocols that are similar
to RSTP in the way to implement rapid transition on designated ports. When a switch of
this kind operates as the upstream switch of an S7500 switch running MSTP, the
upstream designated port fails to change their states rapidly.
The rapid transition function is designed to resolve this problem. When an S7500
switch running MSTP is connected in the upstream direction to another vendor's switch
running proprietary spanning tree protocol, you can enable the rapid transition function
on the ports of the S7500 switch operating as the downstream switch. Among these
ports, the root ports will then send agreement packets to their upstream ports after they