H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – MSTP
H3C S7500 Series Ethernet Switches Chapter 1
MSTP Configuration
1-13
Caution:
z Once you specify a switch as the root bridge or a secondary root bridge by using the
stp root primary or stp root secondary command, the bridge priority of the switch
is not configurable.
z During the selection of the root bridge, if multiple switches have the same bridge
priority, the one with the least MAC address becomes the root bridge.
II. Configuration example
# Set the bridge priority of the current switch to 4,096 in MSTI 1.
<H3C> system-view
[H3C] stp instance 1 priority 4096
1.2.5 MSTP Operation Mode Configuration
An MSTP-enabled switch can operate in one of the following operation modes:
z STP-compatible mode: In this mode, the protocol packets sent out of the ports of
the switch are STP packets. If the switched network contains STP-enabled
switches, you can configure the current MSTP-enabled switch to operate in this
mode by using the stp mode stp command.
z RSTP-compatible mode: In this mode, the protocol packets sent out of the ports of
the switch are RSTP packets. If the switched network contains RSTP-enabled
switches, you can configure the current MSTP-enabled switch to operate in this
mode by using the stp mode rstp command.
z MSTP mode: In this mode, the protocol packets sent out of the ports of the switch
are MSTP packets, or STP packets if the ports have STP-enabled switches
connected. But the multiple spanning tree function is only enabled for MSTP
packets.
I. Configuration procedure
Follow these steps to configure MSTP operation mode:
To do ... Use the command ... Remarks
Enter system view
system-view
—
Configure the
MSTP operation
mode for the switch
stp mode { stp | rstp |
mstp }
Required
An MSTP-enabled switch
operates in the MSTP mode
by default.