Allied Telesis AT-S39 - Manual (Page 253)

Section III: Web Browser Management
253
Configuring RSTP
Caution
The bridge provides default RSTP parameters that are adequate for
most networks. Changing them without prior experience and an
understanding of how RSTP works might have a negative effect on
your network. You should consult the IEEE 802.1w standard before
changing any of the RSTP parameters.
1. From the Spanning Tree tab window, click RSTP Configuration and
click Configure.
The RSTP Bridge Configuration window in Figure 82 is displayed.
Figure 84 RSTP Bridge Configuration Window