H3C S3100 Series Command Manual page 299

Command Manual (For Soliton) – MSTP
H3C S3100 Series Ethernet Switches
Parameters
interface-type: Port type.
interface-number: Port number.
Description
Use the stp interface no-agreement-check command to enable the rapid transition
feature on the specified port.
Use the undo stp interface no-agreement-check command to disable the rapid
transition feature on the specified port.
The rapid transition feature is disabled on any port by default.
Some manufactures' 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 H3C series switches running
MSTP, the upstream designated port fails to change their states rapidly.
The rapid transition feature is developed on the H3C series switches to avoid this case.
When an H3C series switch running MSTP is connected in the upstream direction to a
manufacture's switch adopting proprietary spanning tree protocols, you can enable the
rapid transition feature on the ports of the H3C series switch operating as the
downstream switch. Among these ports, those operating as 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:
The rapid transition feature can be enabled on root ports or alternate ports only.
You can enable the rapid transition feature on the designated port, however, the
feature does not take effect on the port.
Examples
# Enable the rapid transition feature for Ethernet 1/0/1.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname]stp interface Ethernet 1/0/1 no-agreement-check
Chapter 1 MSTP Configuration Commands
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