Asus GigaX2024SX - Manual (Page 308)

Command Mode
Global Configuration
Command Usage
nning Tree Algorithm (STA) can be used to detect and disable network
loops, and to provide backup links between switches, bridges or routers. This
al
dging devices (that is, an STA-compliant
swit exists
between any two stations on the network, and provide backup links which
over when a primary link goes down.
Exa
s how to enable the Spanning Tree Algorithm for the switch:
The Spa
lows the switch to interact with other bri
ch, bridge or router) in your network to ensure that only one route
automatically take
mple
This example show
spanning-tree mode
This command selects the spanning tree mode for this switch. Use the no form to
restore the default.
Syntax
spanning-tree mode {stp | rstp}
no spanning-tree mode
• 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.
• 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
4-140