3Com 4510G Configuration Manual page 83

Enabling the MSTP Feature
Configuring an MST Region
Configuring the Work Mode of an MSTP Device
Configuring the Timeout Factor
Configuring the Maximum Port Rate
Configuring Ports as Edge Ports
Configuring the Configuring Path Costs of Ports
leaf nodes
Configuring Port Priority
Configuring the Link Type of Ports
Configuring the Mode a Port Uses to Recognize/Send
MSTP Packets
Enabling the Output of Port State Transition Information
Enabling the MSTP Feature
Performing mCheck
Configuring Digest Snooping
Configuring No Agreement Check
Configuring Protection Functions
If GVRP and MSTP are both enabled on a device at the same time, GVRP packets will be
forwarded along the CIST. Therefore, if you wish to advertise a certain VLAN within the network
through GVRP in this case, make sure that this VLAN is mapped to the CIST (MSTI 0) when you
configure the VLAN-to-instance mapping table. For the detailed information of GVRP, refer to
GVRP Configuration of the Access Volume.
MSTP is mutually exclusive with any of the following functions on a port: service loopback, RRPP,
Smart Link, and BPDU tunnel.
Configurations made in system view take effect globally; configurations made in Ethernet interface
view take effect on the current interface only; configurations made in port group view take effect
on all member ports in the port group; configurations made in Layer 2 aggregate interface view
take effect only on the aggregate interface; configurations made on an aggregation member port
can take effect only after the port is removed from the aggregation group.
After you enable MSTP on a Layer 2 aggregate interface, the system performs MSTP calculation
on the Layer 2 aggregate interface but not on the aggregation member ports. The MSTP enable
state and forwarding state of each selected port in an aggregation group is consistent with those
of the corresponding Layer 2 aggregate interface.
Though the member ports of an aggregation group do not participate in MSTP calculation, the
ports still reserve its MSTP configurations for participating MSTP calculation after leaving the
aggregation group.
Task
4-16
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