SMC Networks SMC6224M manual Configuring Global Settings, 132

CONFIGURING THE SWITCH

Configuring Global Settings

Global settings apply to the entire switch.

Command Usage

•Spanning Tree Protocol8

Uses RSTP for the internal state machine, but sends only 802.1D BPDUs.

•Rapid Spanning Tree Protocol8

RSTP supports connections to either STP or RSTP nodes by monitoring the incoming protocol messages and dynamically adjusting the type of protocol messages the RSTP node transmits, as described below:

-STP Mode – If the switch receives an 802.1D BPDU (i.e., STP BPDU) after a port’s migration delay timer expires, the switch assumes it is connected to an 802.1D bridge and starts using only 802.1D BPDUs.

-RSTP Mode – If RSTP is using 802.1D BPDUs on a port and receives an RSTP BPDU after the migration delay expires, RSTP restarts the migration delay timer and begins using RSTP BPDUs on that port.

Command Attributes

Basic Configuration of Global Settings

•Spanning Tree State – Enables/disables STA on this switch. (Default: Enabled)

•Spanning Tree Type – Specifies the type of spanning tree used on this switch:

-STP: Spanning Tree Protocol (IEEE 802.1D); (i.e., when this option is selected, the switch will use RSTP set to STP forced compatibility mode).

-RSTP: Rapid Spanning Tree (IEEE 802.1w); RSTP is the default.

8.STP and RSTP BPDUs are transmitted as untagged frames, and will cross any VLAN boundaries.

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