Dell 9.8(0.0) - page 1251

Version Description
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.5.1.0 Introduced
Usage
Information
By default, the system implements an optimized flush mechanism for MSTP. This
mechanism helps in flushing the MAC addresses only when necessary (and less
often) allowing for faster convergence during topology changes. However, if a
standards-based flush mechanism is needed, this knob command can be turned
on to enable flushing MAC addresses after receiving every topology change
notification.
Multiple Spanning Tree Protocol (MSTP) 1251