3Com MSR 50, MSR 30 manual Related commands reset stp, 599

599

Based on the MSTP status information and statistics information, you can analyze and maintain the network topology or check whether MSTP is working normally.

Note that:

■If you do not specify any MST instance ID or port list, this command will display the MSTP information on all ports. The displayed information is sequenced by MST instance ID and by port name in each MST instance.

■If you specify an MST instance ID, this command will display the MSTP information on all ports in that MST instance. The displayed information is sequenced by port name.

■If you specify a port list, this command will display the MSTP information on the specified ports. The displayed information is sequenced by MST instance ID, and by port name in each MST instance.

■If you specify both an MST instance ID and a port list, this command will display the MSTP information of the specified MST instance on the specified ports.

The MSTP status information includes:

■CIST global parameters: Protocol work mode, device priority in the CIST instance (Priority), MAC address, hello time, max age, forward delay, maximum hops, common root of the CIST, external path cost from the device to the CIST common root, regional root, the internal path cost from the device to the regional root, CIST root port of the device, and status of the BPDU guard function (enabled or disabled).

■CIST port parameters: Port status, role, priority, path cost, designated bridge, designated port, edge port/non-edge port, whether connecting to a point-to-point link, maximum transmission rate (transmit limit), status of the root guard function (enabled or disabled), BPDU format, boundary port/non-boundary port, hello time, max age, forward delay, message age, remaining hops, whether a port in an aggregation group, and whether rapid state transition enabled (designated ports).

■MSTI global parameters: MSTI instance ID, bridge priority of the instance, regional root, internal path cost, MSTI root port, and master bridge.

■MSTI port parameters: Port status, role, priority, path cost, designated bridge, designated port, remaining hops, whether a port in an aggregation group, and whether rapid state transition enabled (for designated ports).

The statistics information includes:

■The number of TCN BPDUs, configuration BPDUs, RST BPDUs and MST BPDUs sent from each port

■The number of TCN BPDUs, configuration BPDUs, RST BPDUs, MST BPDUs and wrong BPDUs received on each port

■The number of BPDUs discarded on each port

Related commands: reset stp.

Examples # View the MSTP status information and statistics information.