Nortel Passport 1100 Release Note page 8

8 Recommendations and feature-specific information about release 2.0.7.8
When STP is globally enabled on the STG, BPDU handling depends on the
following STP setting of the port:
• When STP is enabled on the port, received BPDUs are processed in
accordance with STP.
• When STP is disabled on the port, the port will always be in a forwarding
state, received BPDUs are dropped and not processed, and no BPDU is
generated.
To configure STP on STGs with the CLI, use this command:
config stg <sid> group-stp <enable|disable>
To configure STP on a port with the CLI, use this command:
config ethernet <ports> stg <sid> stp <enable|disable>
To configure STGs with Device Manager, choose VLAN > Stg > Configuration.
To configure STP on a port with Device Manager, choose the port and the
spanning tree tab.
High-priority switching
The Passport 1000 Series switch operates in one of two modes: Best Effort mode
or Priority mode. The factory default setting is Best Effort mode; in this mode, all
traffic is treated with the same priority. In Priority mode, high-priority traffic
flows through the switch fabric using a high-priority data path; output buffers are
reserved for high-priority traffic. This does not apply to IEEE 802.1p packets.
Nortel Networks recommends that you enable Priority mode on switches in very
heavy traffic situations. Enabling Priority avoids delaying vital high-priority
network traffic, including BPDUs and routing protocol information. To enable
Priority using the CLI, enter:
config sys set flags highpriomode true
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Note: The switch must be rebooted before this change takes effect.