Configuring The Mstp Operation Mode - 3Com 4500 Configuration Manual

To do...
Enter system view
Enter Ethernet port view
Configure how a port
recognizes and sends
MSTP packets
Configuration example
# Configure Ethernet 1/0/1 to recognize and send packets in dot1s format.
<Sysname> system-view
[Sysname] interface Ethernet 1/0/1
[Sysname-Ethernet1/0/1] stp compliance dot1s
# Restore the default mode for Ethernet 1/0/1 to recognize/send MSTP packets.
[Sysname-Ethernet1/0/1] undo stp compliance

Configuring the MSTP Operation Mode

To make an MSTP-enabled switch compatible with STP/RSTP, MSTP provides the following three
operation modes:
STP-compatible mode, where the ports of a switch send STP BPDUs to neighboring devices. If
STP-enabled switches exist in a switched network, you can use the stp mode stp command to
configure an MSTP-enabled switch to operate in STP-compatible mode.
RSTP-compatible mode, where the ports of a switch send RSTP BPDUs to neighboring devices. If
RSTP-enabled switches exist in a switched network, you can use the stp mode rstp command to
configure an MSTP-enabled switch to operate in RSTP-compatible mode.
MSTP mode, where the ports of a switch send MSTP BPDUs or STP BPDUs (if the switch is
connected to STP-enabled switches) to neighboring devices. In this case, the switch is
MSTP-capable.
Configuration procedure
Follow these steps to configure the MSTP operation mode:
To do...
Enter system view
Configure the MSTP operation
mode
Configuration example
# Specify the MSTP operation mode as STP-compatible.
Use the command...
system-view
interface interface-type
interface-number
stp compliance { auto |
dot1s | legacy }
Use the command...
system-view
stp mode { stp | rstp | mstp }
1-21
Remarks
—
—
Required
By default, a port recognizes and sends
MSTP packets in the automatic mode.
That is, it determines the format of
packets to be sent according to the
format of the packets received.
Remarks
—
Required
An MSTP-enabled switch
operates in the MSTP mode by
default.