H3C S7500 Series Ethernet Switches Command Manual

Command Manual – MSTP
H3C S7500 Series Ethernet Switches Chapter 1
MSTP Configuration Commands
1-23
The rapid transition function is disabled on any port by default.
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 developed to avoid this case. 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
receive proposal packets from the upstream designated ports, instead of waiting for
agreement packets from the upstream switch. This enables designated ports of the
upstream switch to change their states rapidly.
Related commands: stp no-agreement-check.
 Note:
z The rapid transition function can be enabled on root ports or alternate ports only.
z If you configure the rapid transition function on the designated port, the function
does not take effect on the port.
Examples
# Enable the rapid transition function for Ethernet 2/0/1.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C]stp interface Ethernet2/0/1 no-agreement-check
1.1.22 stp interface point-to-point
Syntax
stp interface interface-list point-to-point { force-true | force-false | auto }
undo stp interface interface-list point-to-point
View
System view
Parameters
interface-list: Ethernet port list. You can specify multiple Ethernet ports by providing this
argument in the form of interface-list = { interface-type interface-number [ to