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Cisco SGE2000 - Cisco - Gigabit Switch Administration Guide

Cisco SGE2000 - Cisco - Gigabit Switch
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Configuring Spanning Tree
Defining Spanning Tree
Cisco Small Business SFE/SGE Managed Switches Administration Guide 258
10
Priority — Priority value of the port. The priority value influences the port
choice when a bridge has two ports connected in a loop. The priority value is
between 0 -240. The priority value is provided in increments of 16.
Designated Bridge ID — Indicates the bridge priority and the MAC Address of
the designated bridge.
Designated Port ID — Indicates the selected port’s priority and interface.
Designated Cost — Indicates the cost of the port participating in the STP
topology. Ports with a lower cost are less likely to be blocked if STP detects
loops.
Forward Transitions — Indicates the number of times the port has changed
from the Blocking state to Forwarding state.
LAG — Indicates the LAG to which the port belongs. If a port is a member of a
LAG, the LAG settings override the port settings.
STEP 3 Define the relevant fields.
STEP 4 Click Apply. The interface settings are modified, and the device is updated.
Defining Rapid Spanning Tree
While the classic spanning tree prevents Layer 2 forwarding loops in a general
network topology, convergence can take between 30-60 seconds. This time may
delay detecting possible loops, and propagating status topology changes. Rapid
Spanning Tree Protocol (RSTP) detects and uses network topologies that allow a
faster STP convergence without creating forwarding loops.

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Cisco SGE2000 - Cisco - Gigabit Switch Specifications

General IconGeneral
Form FactorRack-mountable
Switching Capacity48 Gbps
Forwarding Rate35.7 Mpps
LayerLayer 2
Power SupplyInternal
ManagementWeb-based, SNMP, CLI
MAC Address Table Size8000 entries
VLANs256
FeaturesQuality of Service (QoS), IGMP snooping, Port mirroring
Dimensions (W x D x H)440 x 257 x 44 mm (17.3 x 10.1 x 1.73 in)
Operating Temperature0°C to 40°C (32°F to 104°F)
Storage Temperature-20 to 70°C (-4 to 158°F)
Relative Humidity10% to 90% non-condensing
Standards ComplianceIEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3x

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