Configuring Root Bridge 159
Configuration example
# Configure Ethernet 1/0/1 to recognize and send packets in dot1s format.
<4210> system-view
[4210] interface Ethernet1/0/1
[4210-Ethernet1/0/1] stp compliance dot1s
# Restore the default mode for Ethernet 1/0/1 to recognize/send MSTP packets.
[4210-Ethernet1/0/1] undo stp compliance
Configuring the MSTP
Operation Mode
To make a 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.
Configure the mode a port
recognizes and sends MSTP
packets
stp interface interface-type
interface-number
compliance { auto | dot1s |
legacy }
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.
Tab le 107 Configure the mode a port recognizes and sends MSTP packets (in Ethernet
port view)
Operation Command Description
Enter system view system-view -
Enter Ethernet port view interface interface-type
interface-number
-
Configure the mode a port
recognizes and sends MSTP
packets
stp compliance { auto |
dot1s | legacy }
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.
Table 106 Configure the mode a port recognizes and sends MSTP packets (in system
view)
Operation Command Description
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