Configuration using Web Based Management and Command Line Interface
4.5 The Switch menu
SCALANCE X-300 / X-400
Configuration Manual, 10/2014, C79000-G8976-C187-22
197
(Rapid) Spanning Tree, media redundancy and passive listening
You have the following options to connect an (R)STP segment to an MRP or HRP ring:
●
using (R)STP to one device in the ring
You can enable (R)STP at the same time as the media redundancy methods MRP or
HRP on different ports of a device (see figure
①
"Permitted (R)STP connection to ring
redundancy").
A connection to several devices of a ring using (R)STP is not possible. Since the (R)STP
BPDUs are not forwarded via an MRP or HRP ring, this results in circulating frames and
the failure of the data traffic (compare
②
"Impermissible (R)STP connection to ring
redundancy").
①
Permitted (R)STP connection to ring redun-
dancy
②
Impermissible (R)STP connection to ring
redundancy
●
using passive listening on various devices in the ring
If you want to link an (R)STP segment to various devices of a MRP or HRP ring, you will
need to enable passive listening on all devices of the ring and disable (R)STP. Since
passive listening supports the forwarding of (R)STP BPDUs, there are no circulating
frames.
Note
(R)STP and passive listening cannot be enabled at the same time on an IE switch.