Cisco SG500-52P Administration Guide

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Cisco 500 Series Stackable Managed Switch Administration Guide Release 1.3 248
Spanning Tree
This section describes the Spanning Tree Protocol (STP) (IEEE802.1D and
IEEE802.1Q) and covers the following topics:
• STP Flavors
• Configuring STP Status and Global Settings
• Defining Spanning Tree Interface Settings
• Configuring Rapid Spanning Tree Settings
• Multiple Spanning Tree
• Defining MSTP Properties
• Mapping VLANs to a MSTP Instance
• Defining MSTP Instance Settings
• Defining MSTP Interface Settings
STP Flavors
STP protects a Layer 2 Broadcast domain from Broadcast storms by selectively
setting links to standby mode to prevent loops. In standby mode, these links
temporarily stop transferring user data. After the topology changes so that the
data transfer is made possible, the links are automatically re-activated.
Loops occur when alternate routes exist between hosts. Loops in an extended
network can cause switches to forward traffic indefinitely, resulting in increased
traffic load and reduced network efficiency.
STP provides a tree topology for any arrangement of switches and
interconnecting links, by creating a unique path between end stations on a
network, and thereby eliminating loops.

Cisco SG500-52P Specifications

General

Model	SG500-52P
Ports	52
PoE Ports	48
PoE+	Yes
Switching Capacity	104 Gbps
Layer	Layer 3
Power over Ethernet (PoE)	Yes
Rack Mountable	Yes
VLAN Support	Yes
Manageable	Yes
Jumbo Frame Support	Yes
Power Supply	Internal
Dimensions	440 x 44 x 350 mm
MAC Address Table Size	16K entries
Operating Temperature	0°C to 50°C
Storage Temperature	-20 to 70°C (-4 to 158°F)
Relative Humidity	10% to 90%, non-condensing