Cisco SG500-28 24-Port Gigabit Ethernet Switch
Advanced Features for Demanding Environments, at an Affordable Price

Overview:

Your business is growing, and that means more customers, more opportunities, and more attention on your company. The only problem: Your network was built for a smaller operation. As you add more devices, applications, and users, your IT environment will become increasingly difficult and expensive to manage. Even worse, as the network becomes more complex and overloaded, your users are likely to see sluggish performance and even outages.

With more customers and employees depending on your business than ever before, a slow or unreliable network is simply not an option. You need an IT backbone that provides excellent performance, nonstop availability, and advanced security. The ideal network will be easy to manage, even as it supports more advanced features, and will be designed to grow with your company. And it is available at a price you can afford.

The Cisco® 500 Series Stackable Managed Switches are a new line of stackable managed Ethernet switches that provide the advanced capabilities you need to support a more demanding network environment, at an affordable price. These switches provide 24 or 48 ports of Fast Ethernet and 24 to 52 ports of Gigabit Ethernet connectivity with optional 10 Gigabit uplinks, providing a solid foundation for your current business applications, as well as those you are planning for the future. At the same time, these switches are easy to deploy and manage, without a large IT staff.

Cisco 500 Series switches are designed to protect your technology investment as your business grows. Unlike switches that claim to be stackable but have elements which are administered and troubleshot separately, the Cisco 500 Series provides true stacking capability, allowing you to configure, manage, and troubleshoot multiple physical switches as a single device and more easily expand your network. The Cisco 500 Series switch offer models which are fanless making it one of the industry's first in stackable switches, thereby delivering increased reliability, power efficiency, and minimizing noise.

A true stack delivers a unified data and control plane, in addition to management plane, providing flexibility, scalability, and ease of use since the stack of units operate as a single entity constituting all the ports of the stack members. The switches also protect your technology investment with an enhanced warranty, dedicated technical support, and the ability to upgrade equipment in the future and receive credit for your Cisco 500 Series switch. Overall, the Cisco 500 Series provides the ideal technology foundation for a growing business.

Cisco 500 Series Stackable Managed Switches

Features and Benefits:

Cisco 500 Series switches provide the advanced feature set that growing businesses require, and that high-bandwidth applications and technologies demand. These switches can improve the availability of your critical applications, protect your business information, and optimize your network bandwidth to more effectively deliver information and support applications. The switches provide the following benefits.

Easy Deployment and Use Cisco

500 Series switches are designed to be easy to use and manage by small businesses or the partners that serve them. They feature:

• Simple-to-use graphical interfaces reduce the time required to deploy, troubleshoot, and manage the network and allow you to support sophisticated capabilities without increasing IT head count.
• You can manage the switches as individual devices or use Cisco Configuration Assistant (CCA) to discover, configure, and manage all Cisco devices in the network.
• The switches also support Textview, a full command-line interface (CLI) option for partners that prefer it.
• Using Auto Smartports intelligence, the switch can detect a network device connected to any port and automatically configure the optimal security, quality of service (QoS), and availability on that port.
• Cisco Discovery Protocol (CDP) discovers Cisco devices and allows devices to share critical configuration information, simplifying network setup and integration.
• Support for Simple Network Management Protocol (SNMP) allows you to set up and manage your switches and other Cisco devices remotely from a network management station, improving IT workflow and mass configurations.
• The Cisco FindIT utility, which works through a simple toolbar on the user's web browser, discovers Cisco devices in the network and displays basic information, such as serial numbers and IP addresses, to aid in configuration and deployment. (For more information, and to download this free utility, please visit www.cisco.com/go/findit.)

High Reliability and Resiliency

In a growing business where 24x7 availability is critical, you need to assure that employees can always access the data and resources they need. In these environments, stackable switches can play an important role in eliminating downtime and improving network resiliency. For example, if a switch within a Cisco 500 Series stack fails, another switch immediately takes over, keeping your network up and running. You can also replace individual devices in the stack without taking your network offline or affecting employee productivity.

The Cisco 500X models provide an additional layer of resiliency with support for the Virtual Router Redundancy Protocol (VRRP). VRRP lets you extend the same resiliency that stacking provides for individual switches to complete network domains. By running VRRP between two stacks, you can instantly cut over from one stack to another in the event of a problem, and continue operating even after a failure.

The Cisco 500 Series also supports dual images, allowing you to perform software upgrades without having to take the network offline or worry about the network going down during the upgrade.

Simplified IT Operation

Cisco 500 Series switches help optimize your IT operations with built-in features that simplify and streamline day-to-day network operation:

• True stacking allows you to troubleshoot, configure, and manage multiple physical switches as a single entity.
• Unlike other stacking switches that require uniform configurations, the Cisco 500 Series allows you to mix Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet models in a single stack, providing total flexibility without sacrificing manageability.
• Cisco switches use common chipsets/software across all switching portfolios, so all Cisco switches within a category support the same feature set – making it easier to manage and support all switches across the network.

True Stacking

Some switches claim to support stacking but in practice support only "clustering" – meaning that each switch must still be managed and configured individually. Cisco 500 Series switches provide true stacking capability, allowing you to configure, manage, and troubleshoot all switches in a stack as a single unit, with a single IP address.

A true stack delivers a unified data and control plane, in addition to management plane, providing flexibility, scalability, and ease of use since the stack of units operate as a single entity constituting all the ports of the stack members. This capability can radically reduce complexity in a growing network environment while improving the resiliency and availability of network applications. True stacking also provides other cost savings and administrative benefits through features such as cross-stack QoS, VLANs, and port mirroring, which clustered switches can't support.

Strong Security

Cisco 500 Series switches provide the advanced security features you need to protect your business data and keep unauthorized users off the network:

• Embedded Secure Sockets Layer (SSL) encryption protects management data traveling to and from the switch.
• Extensive access control lists (ACLs) restrict sensitive portions of the network to keep out unauthorized users and guard against network attacks.
• Guest VLANs let you provide Internet connectivity to nonemployee users while isolating critical business services from guest traffic.
• Support for advanced network security applications such as IEEE 802.1X port security tightly limits access to specific segments of your network. © 2011–2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 4 of 16 Data Sheet
• Advanced defense mechanisms, including dynamic Address Resolution Protocol (ARP) inspection, IP Source Guard, and Dynamic Host Configuration Protocol (DHCP) snooping, detect and block deliberate network attacks. Combinations of these protocols are also referred to as IPMB (IP-MACport binding)
• Time based VLANs restrict access to the network during predesignated times, such as business hours.
• Uniform MAC address-based security can be applied automatically to mobile users as they roam between wireless access points.
• Secure Core Technology (SCT) helps ensure that the switch is able to process management traffic in the face of a denial of service attack.
• Private VLAN Edge (PVE) provides Layer 2 isolation between devices on the same VLAN.
• Storm control can be applied to broadcast, multicast, and unknown unicast traffic.

Technical Specifications:

Front View
Rear View

Product Specifications for the Cisco 500 Series
Performance
Switching capacity and forwarding rate	Product Name	Capacity in mpps (64-byte packets)	Switching Capacity (Gbps)
	SF500-24	9.52	28.8
	SF500-24P	9.52	28.8
	SF500-48	13.10	33.6
	SF500-48P	13.10	33.6
	SG500-28	41.67	72
	SG500-28P	41.67	72
	SG500-52	77.38	120
	SG500-52P	77.38	120
	SG500X-24	95.24	128
	SG500X-24P	95.24	128
	SG500X-48	130.95	176
	SG500X-48P	130.95	176
Layer 2 Switching
Spanning Tree Protocol	Standard 802.1d Spanning Tree Support Fast convergence using 802.1w (Rapid Spanning Tree [RSTP]), enabled by default Multiple spanning tree instances using 802.1s (MSTP). 16 instances are supported
Port grouping/link aggregation	Support for IEEE 802.3ad Link Aggregation Control Protocol (LACP) Up to 8 groups Up to 8 ports per group with 16 candidate ports for each (dynamic) 802.3ad LAG
VLAN	Support for up to 4096 VLANs simultaneously Port-based and 802.1Q tag-based VLANs MAC-based VLAN Management VLAN PVE (Private VLAN Edge), also known as Protected Port, with multiple uplinks Guest VLAN Unauthenticated VLAN Protocol-based VLAN CPE VLAN
Voice VLAN	Voice traffic is automatically assigned to a voice-specific VLAN and treated with appropriate levels of QoS. Auto voice capabilities deliver network-wide zero touch deployment of voice endpoints and call control devices.
Multicast TV VLAN	Multicast VLAN used for video applications.
Q-in-Q	VLANs transparently cross over a service provider network while isolating traffic among customers.
GVRP/GARP	Generic VLAN Registration Protocol (GVRP) and Generic Attribute Registration Protocol (GARP) enable automatic propagation and configuration of VLANs in a bridged domain.
DHCP Relay at Layer 2	Relay of DHCP traffic to DHCP server in a different VLAN. Works with DHCP Option 82.
IGMP (versions 1, 2, and 3) snooping	Internet Group Management Protocol (IGMP) limits bandwidth-intensive multicast traffic to only the requesters; supports 1000 multicast groups (source-specific multicasting is also supported).
IGMP querier	IGMP querier is used to support a Layer 2 multicast domain of snooping switches in the absence of a multicast router.
HOL blocking	Head-of-line (HOL) blocking.
Jumbo Frames	Frames up to 9K (9216) bytes in length.
Layer 3
IPv4 routing	Wirespeed routing of IPv4 packets Up to 128 static routes and up to 128 IP interfaces
Wirespeed IPv6 Static Routing	Up to 2K (2048) static routes and up to 128 IPv6 interfaces
CIDR	Support for Classless Inter-Domain Routing
RIP v2 (on 500X)	Support for Routing Information Protocol version 2, for dynamic routing
VRRP (on 500X)	Virtual Router Redundancy Protocol (VRRP) delivers improved availability in a Layer 3 network by providing redundancy of the default gateway servicing hosts on the network. VRRP versions 2 and 3 are supported. Up to 255 virtual routers are supported.
DHCP Relay	Relay of DHCP traffic across IP domains.
User Datagram Protocol (UDP) Relay	Relay of broadcast information across Layer 3 domains for application discovery or relaying of BOOTP/DHCP packets.
Stacking
Hardware stack	Up to 200 ports managed as a single system with hardware failover.
High availability	Fast stack failover delivers minimal traffic loss.
Plug-and-play stacking configuration/management	Master/backup for resilient stack control Auto-numbering Hot swap of units in stack Ring and chain stacking options Auto stacking port speed Flexible stacking port options
High-speed stack interconnects	Cost-effective 5G copper and high-speed 10G Fiber and Copper interfaces.
Mixed stacking support	A stack can consist of a mix of SF500 and SG500 models (mix of 10/100 and Gigabit in the same stack).
Hybrid stack	A mix of SF500, SG500, and SG500X in the same stack (10/100, Gigabit, and 10 Gigabit).
Security
SSH	Secure Shell (SSH) Protocol secures Telnet traffic to and from the switch. SSH versions 1 and 2 are supported.
SSL	Secure Sockets Layer (SSL) encrypts all HTTPS traffic, allowing secure access to the browser-based management GUI in the switch.
IEEE 802.1X (Authenticator role)	RADIUS authentication and accounting, MD5 hash, guest VLAN, unauthenticated VLAN, single/multiple host mode and single/multiple sessions Supports time-based 802.1X Dynamic VLAN assignment
STP BPDU Guard	A security mechanism to protect the networks from invalid configurations. A port enabled for Bridge Protocol Data Unit (BPDU) Guard is shut down if a BPDU message is received on that port.
STP Root Guard	Prevents a port from being selected as a root port, effectively preventing bridges in the LAN segment connected to the port from being a root bridge.
DHCP snooping	Filters out DHCP messages with unregistered IP addresses and/or from unexpected or untrusted interfaces.
IP Source Guard (IPSG)	When IP Source Guard is enabled at a port, the switch filters out IP packets received from the port if the source IP addresses of the packets have not been statically configured or dynamically learned from DHCP snooping.
Dynamic ARP Inspection (DAI)	The switch discards ARP packets from a port if there is no static or dynamic IP/MAC bindings or if there is a discrepancy between the source or destination address in the ARP packet.
Secure Core Technology (SCT)	Ensures that the switch will receive and process management and protocol traffic no matter how much traffic is received.
Layer 2 isolation (PVE) with community VLAN*	Provides Layer 2 isolation between devices in the same VLAN; supports multiple uplinks.
Port security	Ability to lock MAC addresses to ports, and limit the number of learned MAC addresses.
RADIUS/TACACS+	Supports RADIUS and TACACS authentication. Switch functions as a client.
RADIUS accounting	The RADIUS accounting functions allow data to be sent at the start and end of services, indicating the amount of resources (such as time, packets, bytes, and so on) used during the session.
Storm control	Broadcast, multicast, and unknown unicast.
DoS prevention	DoS attack prevention.
Congestion avoidance	A TCP congestion avoidance algorithm is required to minimize and prevent global TCP loss synchronization.
Multiple user privilege levels in CLI	Levels 1, 7, and 15 privilege levels.
ACLs	Support for up to 2000 rules on 500 Series and 3000 on 500X series. Drop or rate limit based on source and destination MAC, VLAN IDor IP address, protocol, port, DSCP/IP precedence, TCP/ User Datagram Protocol (UDP) source and destination ports, 802.1p priority, Ethernet type, Internet Control Message Protocol (ICMP) packets, Internet Group Management Protocol (IGMP) packets, TCP flag. Time-based ACLs supported.
Quality of Service
Priority levels	8 hardware queues
Scheduling	Strict Priority and weighted round-robin (WRR)
Class of service	Port based; 802.1p VLAN priority based; IPv4/v6 IP precedence/ToS/DSCP based; DiffServ; classification and re-marking ACLs, Trusted QoS Queue assignment based on differentiated services code point (DSCP) and class of service (802.1p/CoS)
Rate limiting	Ingress policer; egress shaping and ingress rate control; per VLAN, per port, and flow based
Standards
Standards	IEEE 802.3 10BASE-T Ethernet, IEEE 802.3u 100BASE-TX Fast Ethernet, IEEE 802.3ab 1000BASE-T Gigabit Ethernet, IEEE 802.3ad Link Aggregation Control Protocol, IEEE 802.3z Gigabit Ethernet, IEEE 802.3x Flow Control, IEEE 802.3 ad LACP, IEEE 802.1D (STP, GARP and GVRP), IEEE 802.1Q/p VLAN, IEEE 802.1w Rapid STP, IEEE 802.1s Multiple STP, IEEE 802.1X Port Access Authentication, IEEE 802.3af, IEEE 802.3at, RFC 768, RFC 783, RFC 791, RFC 792, RFC 793, RFC 813, RFC 879, RFC 896, RFC 826, RFC 854, RFC 855, RFC 856, RFC 858, RFC 894, RFC 919, RFC 922, RFC 920, RFC 950, RFC 951, RFC 1042, RFC 1071, RFC 1123, RFC 1141, RFC 1155, RFC 1157, RFC 1350, RFC 1533, RFC 1541, RFC 1542, RFC 1624, RFC 1700, RFC 1867, RFC 2030, RFC 2616, RFC 2131, RFC 2132, RFC 3164, RFC 3411, RFC 3412, RFC 3413, RFC 3414, RFC 3415, RFC 2576, RFC 4330, RFC 1213, RFC 1215, RFC 1286, RFC 1442, RFC 1451, RFC 1493, RFC 1573, RFC 1643, RFC 1757, RFC 1907, RFC 2011, RFC 2012, RFC 2013, RFC 2233, RFC 2618, RFC 2665, RFC 2666, RFC 2674, RFC 2737, RFC 2819, RFC 2863, RFC 1157, RFC 1493, RFC 1215, RFC 3416
IPv6
IPv6	IPv6 Host Mode IPv6 over Ethernet Dual IPv6/IPv4 stack IPv6 Neighbor and Router Discovery (ND) IPv6 Stateless Address Autoconfiguration Path MTU Discovery Duplicate Address Detection (DAD) ICMPv6 IPv6 over IPv4 network with ISATAP tunnel support USGv6 and IPv6 Gold Logo certified
IPv6 QoS	Prioritize IPv6 packets in hardware
IPv6 ACL	Drop or Rate Limit IPv6 packets in hardware
Multicast Listener Discovery (MLD v1/2) snooping	Deliver IPv6 multicast packets only to the required receivers
IPv6 applications	Web/SSL, Telnet Server/SSH, Ping, Traceroute, SNTP, TFTP, SNMP, RADIUS, Syslog, DNS client, DHCP Client, DHCP Autoconfig, IPv6 DHCP Relay, TACACS
IPv6 RFC supported	RFC 4443 (which obsoletes RFC 2463) - ICMPv6 RFC 4291 (which obsoletes RFC 3513) - IPv6 Address Architecture RFC 4291 - IP Version 6 Addressing Architecture RFC 2460 - IPv6 Specification RFC 4861 (which obsoletes RFC 2461) - Neighbor Discovery for IPv6 RFC 4862 (which obsoletes RFC 2462) - IPv6 Stateless Address Auto-configuration RFC 1981 - Path MTU Discovery RFC 4007 - IPv6 Scoped Address Architecture RFC 3484 - Default address selection mechanism RFC 5214 (which obsoletes RFC 4214) - ISATAP tunneling RFC 4293 - MIB IPv6: Textual Conventions and General Group RFC 3595 - Textual Conventions for IPv6 Flow Label
Management
Web user interface	Built-in switch configuration utility for easy browser-based device configuration (HTTP/HTTPS). Supports configuration, system dashboard, system maintenance and monitoring.
SNMP	SNMP versions 1, 2c, and 3 with support for traps, and SNMP v3 User-based Security Model (USM)
Standard MIBs	lldp-MIB lldpextdot1-MIB lldpextdot3-MIB lldpextmed-MIB rfc2674-MIB rfc2575-MIB rfc2573-MIB rfc2233-MIB rfc2013-MIB rfc2012-MIB rfc2011-MIB RFC-1212 RFC-1215 SNMPv2-CONF SNMPv2-TC p-bridge-MIB q-bridge-MIB rfc1389-MIB rfc1493-MIB rfc1611-MIB rfc1612-MIB rfc1850-MIB rfc1907-MIB rfc2571-MIB rfc2572-MIB rfc2574-MIB rfc2576-MIB rfc2613-MIB	rfc2665-MIB rfc2668-MIB rfc2737-MIB rfc3621-MIB rfc4668-MIB rfc4670-MIB trunk-MIB tunnel-MIB udp-MIB draft-ietf-bridge-8021x-MIB draft-ietf-bridge-rstpmib-04-MIB draft-ietf-hubmib-etherif-mib-v3-00-MIB ianaaddrfamnumbers-MIB ianaifty-MIB ianaprot-MIB inet-address-MIB ip-forward-MIB ip-MIB RFC1155-SMI RFC1213-MIB SNMPv2-MIB SNMPv2-SMI SNMPv2-TM RMON-MIB rfc1724-MIB dcb-raj-DCBX-MIB-1108-MIB rfc1213-MIB rfc1757-MIB
Private MIBs	CISCOSB-lldp-MIB CISCOSB-brgmulticast-MIB CISCOSB-bridgemibobjects-MIB CISCOSB-bonjour-MIB CISCOSB-dhcpcl-MIB CISCOSB-MIB CISCOSB-wrandomtaildrop-MIB CISCOSB-traceroute-MIB CISCOSB-telnet-MIB CISCOSB-stormctrl-MIB CISCOSBssh-MIB CISCOSB-socket-MIB CISCOSB-sntp-MIB CISCOSB-smon-MIB CISCOSB-phy-MIB CISCOSB-multisessionterminal-MIB CISCOSB-mri-MIB CISCOSB-jumboframes-MIB CISCOSB-gvrp-MIB CISCOSB-endofmib-MIB CISCOSB-dot1x-MIB CISCOSB-deviceparams-MIB CISCOSB-cli-MIB CISCOSB-cdb-MIB CISCOSB-brgmacswitch-MIB CISCOSB-3sw2swtables-MIB CISCOSB-smartPorts-MIB CISCOSB-tbi-MIB CISCOSB-macbaseprio-MIB CISCOSB-env_mib-MIB CISCOSB-policy-MIB CISCOSB-sensor-MIB CISCOSB-aaa-MIB CISCOSB-application-MIB CISCOSB-bridgesecurity-MIB CISCOSB-copy-MIB CISCOSB-CpuCounters-MIB CISCOSB-Custom1BonjourService-MIB CISCOSB-dhcp-MIB CISCOSB-dlf-MIB CISCOSB-dnscl-MIB CISCOSB-embweb-MIB CISCOSB-fft-MIB CISCOSB-file-MIB CISCOSB-greeneth-MIB CISCOSB-interfaces-MIB CISCOSB-interfaces_recovery-MIB CISCOSB-ip-MIB	CISCOSB-iprouter-MIB CISCOSB-ipv6-MIB CISCOSB-mnginf-MIB CISCOSB-lcli-MIB CISCOSBlocalization-MIB CISCOSB-mcmngr-MIB CISCOSB-mng-MIB CISCOSB-physdescription-MIB CISCOSB-PoE-MIB CISCOSB-protectedport-MIB CISCOSB-rmon-MIB CISCOSB-rs232-MIB CISCOSB-SecuritySuite-MIB CISCOSB-snmp-MIB CISCOSB-specialbpdu-MIB CISCOSB-banner-MIB CISCOSB-syslog-MIB CISCOSB-TcpSession-MIB CISCOSB-traps-MIB CISCOSB-trunk-MIB CISCOSB-tuning-MIB CISCOSB-tunnel-MIB CISCOSB-udp-MIB CISCOSB-vlan-MIB CISCOSB-ipstdacl-MIB CISCOSB-eee-MIB CISCOSB-ssl-MIB CISCOSB-digitalkeymanage-MIB CISCOSB-qosclimib-MIB CISCOSB-vrrp-MIB CISCOSB-tbp-MIB CISCOSB-stack-MIB CISCOSMB-MIB CISCOSB-secsd-MIB CISCOSB-draft-ietf-entmib-sensor-MIB CISCOSB-draft-ietf-syslog-device-MIB CISCOSB-rfc2925-MIB CISCOSB-vrrpv3-MIB CISCO-SMI-MIB CISCOSB-DebugCapabilities-MIB CISCOSB-CDP-MIB CISCOSB-vlanVoice-MIB CISCOSB-EVENTS-MIB CISCOSB-sysmng-MIB CISCOSB-sct-MIB CISCO-TC-MIB CISCO-VTP-MIB CISCO-CDP-MIB
RMON	Embedded RMON software agent supports 4 RMON groups (history, statistics, alarms, and events) for enhanced traffic management, monitoring, and analysis
IPv4 and IPv6 Dual Stack	Coexistence of both protocol stacks to ease migration
Firmware upgrade	Web browser upgrade (HTTP/HTTPS) and TFTP and SCP Upgrade can be initiated through console port as well Dual images for resilient firmware upgrades
Port mirroring	Traffic on a port can be mirrored to another port for analysis with a network analyzer or RMON probe. Up to 8 source ports can be mirrored to one destination port.
VLAN mirroring	Traffic from a VLAN can be mirrored to a port for analysis with a network analyzer or RMON probe. Up to 8 source VLANs can be mirrored to one destination port.
DHCP (Options 12, 66, 67, 82, 129, and 150)	DHCP options facilitate tighter control from a central point (DHCP Server), to obtain IP address, auto configuration (with configuration file download), DHCP Relay, and host name.
Auto configuration with Secure Copy (SCP) file download	Enables secure mass deployment with protection of sensitive data.
Text-editable configs	Config files can be edited with a text editor and downloaded to another switch, facilitating easier mass deployment.
Smartports	Simplified configuration of QoS and security capabilities.
Auto Smartports	Automatically applies the intelligence delivered through the Smartports roles to the port based on the devices discovered over Cisco Discovery Protocol or LLDP-MED. This facilitates zero touch deployments.
Secure Copy (SCP)	Securely transfer files to and from the switch.
Textview CLI	Scriptable CLI. A full CLI as well as a menu CLI is supported.
Cloud Services	Support for Cisco Small Business and Cisco OnPlus.
Localization	Localization of GUI and documentation into multiple languages.
Login banner	Configurable login banners for web as well as CLI.
Time-based port operation	Link up or down based on user-defined schedule (when the port is administratively up).
Other management	Traceroute; single IP management; HTTP/HTTPS; SSH; RADIUS; port mirroring; TFTP upgrade; DHCP client; BOOTP; Simple Network Time Protocol (SNTP); Xmodem upgrade; cable diagnostics; Ping; syslog; Telnet client (SSH secure support); Automatic time settings from Management Station.
Green (Power Efficiency)
Energy Detect	Automatically turns power off on Gigabit Ethernet RJ-45 port when detecting link down. Active mode is resumed without loss of any packets when the switch detects the link is up.
Cable length detection	Adjusts the signal strength based on the cable length. Reduces the power consumption for cable shorter than 10m. Supported on Gigabit Ethernet models.
EEE compliant (802.3az)	Supports IEEE 802.3az on all Gigabit copper ports.
Disable port LEDs	LEDs can be manually turned off to save on energy.
General
Jumbo frames	Frame sizes up to 9K (9216) bytes. Bare supported on 10/100 and Gigabit Ethernet interfaces. The default MTU is 2K.
MAC table	16K (16384) MAC addresses.
Discovery
Bonjour	The switch advertises itself using the Bonjour protocol.
LLDP (802.1ab) with LLDP-MED extensions	Link Layer Discovery Protocol (LLDP) allows the switch to advertise its identification, configuration, and capabilities to neighboring devices that store the data in a MIB. LLDP-MED is an enhancement to LLDP that adds the extensions needed for IP phones.
Cisco Discovery Protocol (CDP)	The switch advertises itself using the Cisco Discovery Protocol (CDP). It also learns the connected device and its characteristics via CDP.
Power over Ethernet (PoE)
IEEE 802.3af and 802.3at PoE delivered over any of the RJ-45 ports within the listed power budgets	Switches support 802.2af, 802.3at, and Cisco pre-standard (legacy) PoE. Maximum power of 30W to any 10/100 or Gigabit base port until the PoE budget for the switch is reached. The total power available for PoE per switch is:
Model Name	Power Dedicated to PoE	Number of Ports That Support PoE
SF500-24	N/A	0
SF500-24P	180W	24
SF500-48	N/A	0
SF500-48P	375W	48
SG500-28	N/A	0
SF500-28P	180W	24
SF500-52	N/A	0
SF500-52P	375W	48
SG500X-24	N/A	0
SG500X-24P	375W	24
SG500X-48	N/A	0
SG500X-48P	375W	48
Power consumption (worst case)
Model Name	Green Power (mode)	Power Consumption (worst case)	Heat Dissipation (BTU/hr)
SF500-24	Energy Detect	110V/0.226A/13.7W 220V/0.160A/14.8W	46.5
SF500-24P	Energy Detect	110V/0.256A/26.1W 220V/0.206A/27W	84.9
SF500-48	Energy Detect	110V/0.445A/24.3W 220V/0.270A/24.8W	77.9
SF500-48P	Energy Detect	110V/0.481A/46.8W 220V/0.319A/47.5W	149.2
SG500-28	EEE + Short Reach + Energy Detect	110V/0.0.443A/23.2W 220V/0.262A/23.6W	74.2
SF500-28P	EEE + Short Reach + Energy Detect	110V/0.333A/35W 220V/0.238A/35.9W	112.8
SF500-52	EEE + Short Reach + Energy Detect	110V/0.439A/47W 220V/0.230A/47W	147.7
SF500-52P	EEE + Short Reach + Energy Detect	110V/0.647A/63.7W 220V/0.405A/64.7W	203.3
SG500X-24	EEE + Short Reach + Energy Detect	110V/0.600A/36.5W 220V/0.348A/36.2W	114.7
SG500X-24P	EEE + Short Reach + Energy Detect	110V/0.576A/57.2W 220V/0.365A/57.9W	181.9
SG500X-48	EEE + Short Reach + Energy Detect	110V/0.545A/60.3W 220V/0.378A/60.3W	189.5
SG500X-48P	EEE + Short Reach + Energy Detect	110V/0.735A/74.4W 220V/0.444A/75W	235.7
Ports
Model Name	Total System Ports	RJ-45 Ports	Combo Ports (RJ-45 + SFP)
SF500-24	24FE + 4 GE (5G Stacking)	24 GE	2 combo GE + 2 1G/5G SFP
SF500-24P	24FE + 4 GE (5G Stacking)	24 GE	2 combo GE + 2 1G/5G SFP
SF500-48	48FE + 4 GE (5G Stacking)	48 FE	2 combo GE + 2 1G/5G SFP
SF500-48P	48FE + 4 GE (5G Stacking)	48 FE	2 combo GE + 2 1G/5G SFP
SG500-28	24GE + 4 GE (5G Stacking)	24 GE	2 combo GE + 2 1G/5G SFP
SF500-28P	24GE + 4 GE (5G Stacking)	24 GE	2 combo GE + 2 1G/5G SFP
SF500-52	48GE + 4 GE (5G Stacking)	48 GE	2 combo GE + 2 1G/5G SFP
SF500-52P	48GE + 4 GE (5G Stacking)	48 GE	2 combo GE + 2 1G/5G SFP
SG500X-24	24GE + 4 10GE	24 GE	4 XG SFP+ (Two combo 5G SFP slots)
SG500X-24P	24GE + 4 10GE	24 GE	4 XG SFP+ (Two combo 5G SFP slots)
SG500X-48	48GE + 4 10GE	48 GE	4 XG SFP+ (Two combo 5G SFP slots)
SG500X-48P	48GE + 4 10GE	48 GE	4 XG SFP+ (Two combo 5G SFP slots)
Product Specifications
Buttons	Reset button
Cabling type	Unshielded twisted pair (UTP) Category 5 or better; Fiber options (SMF and MMF); Coaxial SFP+ for stacking purposes
LEDs	LED power savings, System, Link/Act, PoE, Speed
Flash	32 MB
800 MHz ARM CPU memory	256 MB
Package Contents	Cisco Small Business 500/500X Series Stackable Managed Switch Power cord Mounting kit included with all models Serial cable CD-ROM with user documentation (PDF) included Quick Start Guide
Minimum Requirements	Web browser: Mozilla Firefox version 8 or later; Microsoft Internet Explorer version 7 or later, Safari, Chrome Category 5 Ethernet network cable TCP/IP, network adapter, and network operating system (such as Microsoft Windows, Linux, or Mac OS X) installed
Packet buffer
All numbers are aggregate across all ports, as the buffers are dynamically shared:
Model Name	Packet Buffer
SF500-24	8Mb
SF500-24P	8Mb
SF500-48	2*8Mb
SF500-48P	2*8Mb
SG500-28	8Mb
SF500-28P	8Mb
SF500-52	2*8Mb
SF500-52P	2*8Mb
SG500X-24	12Mb
SG500X-24P	12Mb
SG500X-48	2*12Mb
SG500X-48P	2*12Mb
Supported SFP/SFP+ Modules
SKU	Media	Speed	Maximum Distance
MFEFX1	Multi-mode fiber	100 Mbps	2 km
MFELX1	Single-mode fiber	100 Mbps	10 km
MFEBX1	Single-mode fiber	100 Mbps	20 km
MGBBX1	Single-mode fiber	1000 Mbps	40 km
MGBSX1	Multi-mode fiber	1000 Mbps	300 m
MGBLH1	Single-mode fiber	1000 Mbps	40 km
MGBLX1	Single-mode fiber	1000 Mbps	10 km
MGBT1	UPT cat 5	1000 Mbps	100 m
SFP-H10GB-CU1M	Copper coax	5G (Sx500) / 10G (SG500X)	1 m
SFP-H10GB-CU3M	Copper coax	5G (Sx500) / 10G (SG500X)	3 m
SFP-H10GB-CU5M	Copper coax	5G (Sx500) / 10G (SG500X)	5 m
SFP-10G-SR	Multi-mode fiber	10 Gig	300 m
SFP-10G-LR	Single-mode fiber	10 Gig	10 km
SFP-10G-LRM	Single-mode fiber	10 Gig	40 km
Stack Connection Options
Model Name	500	500X
500	5G copper - SFP-H10GB-CUxM 1G fiber or copper - MGBxxx 1G Base-T - embedded RJ45 (S1/S2)	5G copper - SFP-H10GB-CUxM 1G fiber or copper - MGBxxx
500X	5G copper - SFP-H10GB-CUxM 1G fiber or copper - MGBxxx	10G copper - SFP-H10GB-CUxM 10G Fiber - SFP-10G-xx 1G fiber or copper - MGBxxx
Environmental
Power	100-240V 47-63 Hz, internal, universal
Certification	UL (UL 60950), CSA (CSA 22.2), CE mark, FCC Part 15 (CFR 47) Class A
Operating temperature	32° to 104°F (0° to 40°C)
Storage temperature	-4° to 158°F (-20° to 70°C)
Operating humidity	10% to 90%, relative, noncondensing
Storage humidity	10% to 90%, relative, noncondensing
Unit Dimensions (W x H x D)
SF500-24	440 x 44 x 257 mm
SF500-24P	440 x 44 x 257 mm
SF500-48	440 x 44 x 257 mm
SF500-48P	440 x 44 x 350 mm
SG500-28	440 x 44 x 257 mm
SF500-28P	440 x 44 x 257 mm
SF500-52	440 x 44 x 257 mm
SF500-52P	440 x 44 x 350 mm
SG500X-24	440 x 44 x 257 mm
SG500X-24P	440 x 44 x 350 mm
SG500X-48	440 x 44 x 257 mm
SG500X-48P	440 x 44 x 350 mm
Unit weight
SF500-24	3.09 kg
SF500-24P	3.73 kg
SF500-48	3.43 kg
SF500-48P	5.61 kg
SG500-28	3.4 kg
SF500-28P	3.95 kg
SF500-52	3.95 kg
SF500-52P	5.61 kg
SG500X-24	3.45 kg
SG500X-24P	5.25 kg
SG500X-48	4.01 kg
SG500X-48P	5.74 kg

Supported SFP/SFP+ Modules
Model Name	Fan (Number)	Acoustic Noise	MTBF @ 40°C (Hours)	MTBF @ 45°C (Hours)
SF500-24	No fan	N/A	210,801.7	162,077
SF500-24P	2 pcs/ 6300rpm No fan speed control	41 dB	260,626.2	198,687
SF500-48	No fan	N/A	131,127.2	103,602
SF500-48P	3 pcs/9500rpm and fan speed control	30°C=43dB 40°C=54.5dB	147,998.3	113,497
SG500-28	No fan	N/A	141,161.0	109,796
SF500-28P	2 pcs/5000rpm No fan speed control	41.2 dB	253,175.1	192,348
SF500-52	2 pcs/5000rpm No fan speed control	41.3dB	154,250.1	117,064
SF500-52P	4 pcs/9500rpm and fan speed control	30°C=41.1dB 40°C=54.8dB	143,124.8	105,252
SG500X-24	1 pcs/6300rpm No fan speed control	40.2dB	246,188.2	190,535
SG500X-24P	3 pcs/9500rpm and fan speed control	30°C=40.1dB 40°C=52.2dB	132,225.7	97,140
SG500X-48	2 pcs/5000rpm No fan speed control	41.1dB	166,796.4	126,041
SG500X-48P	4 pcs/9500rpm and fan speed control	30°C=40.9dB 40°C=54.2dB	137,246.1	111,577

Documentation:

Download the Cisco 500 Series Stackable Managed Switches Datasheet (PDF).