Specifications

Switching activate mstp migrationcheck port 8-69
Software Release 2.7.3
C613-03098-00 REV A
Command Reference
This section describes the commands available to configure and manage the
switching functions on the switch.
The shortest valid command is denoted by capital letters in the Syntax section.
See “Conventions” on page xcviii of About this Software Reference in the front
of this manual for details of the conventions used to describe command syntax.
See Appendix A, Messages for a complete list of messages and their meanings.
The Rapier i Series switch has additional command parameters and options
that are not available for the Rapier Series switch. These are noted in the
command description section as “On the Rapier i Series switches only...”.
activate mstp migrationcheck port
Syntax ACTivate MSTp MIGRationcheck POrt={port-list|ALL}
where port-list is a port number, range (specified as n-m), or comma-separated
list of port numbers and/or ranges. Port numbers start at 1 and end at m,
where m is the highest numbered Ethernet switch port, including uplink ports.
Description If an MSTP bridge detects the presence of STP data on one of its ports (from a
legacy bridge) it automatically migrates the port to the STP protocol. Other
MSTP and RSTP bridges connected to this port do the same. Thus all bridges
that connect to this port revert to the STP protocol. However, this condition
remains even after the original STP bridge has been removed.
Activating a migration check (mcheck) on such a port forces the bridge to
migrate back to MSTP (or RSTP) and to transmit either MSTP (or RSTP)
messages. After receiving these messages, other RSTP/MSTP bridges follow
the same procedure. If no further STP bridge messages are received within a
preset time period, then all the connected bridges remain in MSTP mode. The
bridge decides whether to use RSTP or MSTP mode based on the setting of the
protocolversion parameter of the MSTP command.
The port parameter specifies ports that are to have an mcheck applied to them.
If all is specified, all ports in the switch are forced to the mcheck message. If the
command would succeed on a subset of the ports specified, but cause an error
on the others, then the command as a whole fails and has no effect.
The port parameter specifies the ports to transmit the mcheck messages. If all
is specified, then all ports in the switch have an mcheck applied to them.
Example To transmit mcheck messages to all ports on the switch, use the command:
act mst migr po=all
Related Commands show mstp