SMC Networks SMC8612XL3 Manual de usuario descargar pdf (Pagina 622)

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• stp - Spanning Tree Protocol (IEEE 802.1D)

• rstp - Rapid Spanning Tree Protocol (IEEE 802.1w)

Default Setting

rstp

Command Mode

Global Configuration

Command Usage

• Spanning Tree Protocol

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

- This creates one spanning tree instance for the entire network. If multiple

VLANs are implemented on a network, the path between specific VLAN

members may be inadvertently disabled to prevent network loops, thus

isolating group members. When operating multiple VLANs, we

recommend selecting the MSTP option.

• Rapid Spanning Tree Protocol

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 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.

Example

The following example configures the switch to use Rapid Spanning Tree:

Console(config)#spanning-tree mode rstp

Console(config)#

1 2 ... 617 618 619 620 621 622 623 624 625 626 627 ... 845 846

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