AQ-200 series devices don’t
implement any support for the RSTP-protocol. They should be always treated as
That being said,
under certain circumstances, it is possible to mix RSTP and non-RSTP devices.
For example, the so-called “RSTP ring” (a configuration where two RSTP-switches
and several non-RSTP devices are connected into a single loop) should be able
to operate although in my understanding this isn’t the application intended by
the standard. Also, one needs to be extremely careful when mixing RSTP and
non-RSTP devices as it is very easy to cause unintended and unresolved loops or
unintentionally inactive links when the complexity of the network increases.
It should also be noted that RSTP really isn’t even intended to be used as a high-availability redundancy network protocol. RSTP should be used only to safeguard the network against unintended loops. For proper redundancy, for example HSR or PRP should be used instead.