SG550X-48P 48-Port Gigabit PoE Stackable Managed Switch - SG550X-48P-K9-EU

Cisco SG550X-48P 48-port Gigabit PoE Stackable Switch

Category : Enterprise Switching
Brand : Cisco
Model : SG550X-48P-K9-EU


Advanced features for demanding environments at an affordable price

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 customers and employees depending on your business more than ever before, a slow or unreliable network is 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, support advanced features that will grow with your company, and be at a price that’s affordable.

Cisco 550X Series Stackable Managed Switches

The Cisco® 550X Series (Figure 1) are the next-generation stackable managed Ethernet switches that provide the advanced capabilities and superior performance you need to support a more demanding network environment at an affordable price. These switches incorporate fan and power hardware redundancy, increasing overall network availability. The SG550X and SF550X models provide 24 or 48 ports of Gigabit Ethernet and Fast Ethernet connectivity with 10 Gigabit uplinks. The SX550X models provide 12, 16, 24, or 48 ports of 10 Gigabit Ethernet with both copper and fiber connection options, 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 550X Series switches are designed to protect your technology investment as your business grows. Unlike switches that claim to be stackable but have elements that are administered and troubleshot separately, the Cisco 550X 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.

A true stack delivers a unified data and control plane, in addition to a management plane, providing flexibility, scalability, and ease of use because 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 550X Series switch. Overall, the Cisco 550X Series provides the ideal technology foundation for a growing business.

Features and benefits

Cisco 550X 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.

High-performance 10 Gigabit Ethernet

Cisco 550X Series switches break the barrier of 10 Gigabit Ethernet adoption by providing affordable and flexible configurations customized for the demanding network requirements of small and medium businesses.

With 10G copper ports on the SX550X switches, you can easily and cost-effectively enable 10G connections to servers and network storage devices with standard RJ-45 Ethernet cable. You can also connect your SG550X access switches to the SX550X aggregation with 10G SFP+ fiber, building a high-performance backbone to speed up the overall operation of your network.

High reliability and resiliency

In a growing business in which availability 24 hours a day, 7 days a week is critical, you need to assure that employees and customers can always access the data and resources whenever they need. In these environments, stackable switches can play an important role in minimizing downtime and improving network resiliency. For example, if the master switch within a Cisco 550X Series stack fails, another switch takes over, keeping your network up and running. You can also replace individual devices in the stack without taking your whole network offline or affecting employee productivity.

The Cisco 550X Series is designed to deliver hardware redundancy at the lowest incremental cost. Power redundancy is delivered with the Cisco RPS2300 external RPS system. If power to the switch is lost (through loss of AC power or power supply failure), the switch will automatically, and instantaneously, obtain its power from the RPS. This switchover occurs so quickly that there is no loss in traffic or reboot of the device. A Cisco RPS2300 system can be connected to up to six 550X Series switches to provide redundancy. Cooling fan redundancy is delivered through preinstalled N+1 configuration. A switch can fully support all its capabilities for the life of the product with only N fans. If one of the fans fails, the spare fan automatically takes over, without causing any downtime.

The Cisco 550X Series provides 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 550X Series also supports dual images, allowing you to perform software upgrades without having to worry about the network going down during the upgrade.

Power over Ethernet Plus (PoE+) and 60W PoE

Cisco 550X Series switches support the Power over Ethernet Plus (PoE+) standard (IEEE 802.3at), providing up to 30 watts per port. The switches also support 60W PoE on selected ports to power compact switches, high-power wireless access points, or connected lighting. The power is managed in a smart fashion such that only the amount of power the endpoint needs is delivered to it and not wasted. As a result, the switches can support devices that require more power, such as 802.11ac wireless access points, video-based IP phones, surveillance cameras, and more.

PoE capabilities simplify the deployment of advanced technologies by allowing you to connect and power network endpoints over a single Ethernet cable, without having to install separate power supplies. Cisco 550X Series switches are also fully backward compatible with IEEE 802.11af PoE and Cisco legacy PoE protocols.

Power efficiency

The Cisco 550X Series integrates a variety of power-saving features across all models, providing the industry’s most extensive energy-efficient switching portfolio. These switches are designed to conserve energy by optimizing power use, which helps protects the environment and reduce your energy costs. They provide an eco-friendly network solution without compromising performance. Cisco 550X Series switches feature:

  • Support for the Energy Efficient Ethernet (IEEE 802.3az) standard, which reduces energy consumption by monitoring the amount of traffic on an active link and putting the link into a sleep state during quiet periods
  • The latest Application-Specific Integrated Circuits (ASICs), which use low-power 28- or 40-nanometer technology and low-power, high-performance ARM CPUs
  • Automatic power shutoff on ports when a link is down
  • LEDs that can be turned off to save power
  • Embedded intelligence to adjust signal strength based on the length of the connecting cable
  • Smart fans in which fan speed is automatically adjusted according to switch temperature to decrease acoustic noise and save power

Advanced 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 550X 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 for up to a maximum of 400 Ethernet ports.

A true stack delivers a unified data and control plane, in addition to management plane, providing flexibility, scalability, and ease of use because the stack of units operates 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, LAGs, and port mirroring, which clustered switches cannot support.

Using standard 10G fiber or copper connections, the Cisco 550X Series supports both local and horizontal stacking deployments and the flexibility of ring or chain topology. The switches also have the capability to use link aggregation port as the stacking port, providing even higher stacking bandwidth for demanding applications.

Easy deployment and use

Cisco 550X Series switches are designed to be easy to use and manage by small and medium businesses, commercial customers, or the partners that serve them. Features include the following:

  • Smart Network Application (SNA) is an innovative network-level monitoring and management tool embedded in the Cisco 250 to 550X Series switches. It can discover network topology, display link status, monitor events, apply configurations, and upgrade software images across multiple switches in the network.
  • The FindIT Network Manager and Probe are designed to manage Cisco 100 to 500 Series switches, routers, and wireless access points. They let you proactively manage the network instead of just reacting to events. Cisco 550X Series switches support the embedded FindIT Network Probe, eliminating the need to set up a separate hardware or virtual machine on site. For more information, visit
  • The FindIT Network Discovery Utility works through a simple toolbar on the user’s web browser to discover Cisco devices on the network and display basic device information, inventory, and new firmware updates to aid in the configuration and speed the deployment of Cisco Small Business products. For more information, visit
  • Simple and advanced mode graphic user interfaces reduce the time required to deploy, troubleshoot, and manage the network and allow you to support sophisticated capabilities without increasing IT head count.
  • Configuration wizards simplify the most common configuration tasks and provide the ultimate tool for anyone to easily set up and manage the network.
  • The switches also support Textview, a full Command-Line Interface (CLI) option for customers or partners that prefer it.
  • Using Auto Smart ports 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 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 USB port on the switch enables easy image and configuration transfer for faster deployment or upgrade.

Simplified IT operation

Cisco 550X Series switches help optimize your IT operations with built-in features that simplify day-to-day network operation:

  • True stacking allows you to configure, manage, and troubleshoot multiple physical switches as a single entity.
  • Unlike other stacking switches that require uniform configurations, the Cisco 550X 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 series support the same feature set, making it easier to manage and support all switches across the network.

Strong security

Cisco 550X 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. Web-based authentication provides a consistent interface to authenticate all types of host devices and operating systems, without the complexity of deploying IEEE 802.1X clients on each endpoint.
  • 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 IP-MAC port binding (IPMB).
  • IPv6 First Hop Security extends the advanced threat protection to IPv6. This comprehensive security suite includes ND inspection, RA guard, DHCPv6 guard, and neighbor binding integrity check, providing unparalleled protection against a vast range of address spoofing and man-in-the-middle attacks on IPv6 networks.
  • Time-based ACLs and port operation 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 (DoS) attack.
  • Private VLAN provides Layer 2 isolation between devices on the same VLAN.
  • Storm control can be applied to broadcast, multicast, and unknown unicast traffic.
  • Protection of management sessions is possible using RADIUS, TACACS+, and local database authentication as well as secure management sessions over SSL, SSH, and SNMPv3.
  • DoS attack prevention maximizes network uptime in the presence of an attack.

Advanced Layer 3 traffic management

The Cisco 550X Series enables a more advanced set of traffic management capabilities to help growing businesses organize their networks more effectively and efficiently. For example, the switches provide static Layer 3 routing, allowing you to segment your network into workgroups and communicate across VLANs without degrading application performance.

With these capabilities, you can boost the efficiency of your network by offloading internal traffic-handling tasks from your router and allowing it to manage primarily external traffic and security.

Additionally, the Cisco 550X Series provides dynamic Layer 3 routing features. These capabilities help you minimize the need to manually configure routing devices and simplify the ongoing operation of the network.

IPv6 support

As the IP address scheme evolves to accommodate a growing number of network devices, the Cisco 550X Series can support the transition to the next generation of networking and operating systems. These switches continue to support previous-generation IPv4, allowing you to evolve to the new IPv6 standard at your own pace and helping ensure that your current network will continue to support your business applications in the future. Cisco 550X Series switches have successfully completed rigorous IPv6 testing and have received the USGv6 and IPv6 Gold certification.

Networkwide automatic voice deployment

Using a combination of Cisco Discovery Protocol, LLDP-MED, Auto Smart ports, and Voice Services Discovery Protocol (VSDP, a unique Cisco protocol), customers can deploy an end-to-end voice network dynamically. The switches in the network automatically converge around a single voice VLAN and QoS parameters and then propagate them out to the phones on the ports where they are discovered. For example, automated voice VLAN capabilities let you plug any IP phone (including third-party phones) into your IP telephony network and receive an immediate dial tone. The switch automatically configures the device with the right VLAN and QoS parameters to prioritize voice traffic.

Peace of mind and investment protection

Cisco 550X Series switches offer the reliable performance and peace of mind you expect from a Cisco switch. When you invest in the Cisco 550X Series, you gain the benefits of:

  • Limited lifetime warranty with Next-Business-Day (NBD) advance replacement (where available; otherwise same-day ship)
  • A solution that has been rigorously tested to help ensure optimal network uptime to keep employees connected to primary resources and productive
  • A solution designed and tested to easily and fully integrate with other Cisco voice, unified communications, security, and networking products as part of a comprehensive technology platform for your business

Cisco limited lifetime hardware warranty

Cisco 550X Series switches offer a limited lifetime hardware warranty with NBD advance replacement (where available; otherwise same-day ship) and a limited lifetime warranty for fans and power supplies.

In addition, Cisco offers telephone technical support at no charge for the first 12 months following the date of purchase and software application updates for bug fixes for the warranty term. To download software updates, go to

Product warranty terms and other information applicable to Cisco products are available at

World-class service and support

Your time is valuable, especially when you have a problem affecting your business. Cisco 550X Series switches are backed by Cisco Small Business Support Service and Cisco Smart Net Total Care® Service, which provide affordable peace-of-mind coverage. These subscription-based services help you protect your investment and derive maximum value from Cisco SMB products. Delivered by Cisco and backed by your trusted partner, Cisco Small Business Support Service includes software updates and access to the Cisco Small Business Support Center, and it extends technical service to three years. Cisco Smart Net Total Care offers a consistent service platform for customers with networks that combine traditional Cisco products with Cisco Small Business products. It also provides global coverage and flexibility of contract terms as well as multiple advance hardware replacement options.

Cisco SMB products are supported by professionals in the Cisco Support Center, a dedicated resource for small business customers and networks, with locations worldwide that are specifically trained to understand your needs. You also have access to extensive technical and product information through the Cisco Support Community, an online forum that enables you to collaborate with your peers and reach Cisco technical experts for support information

Product specifications


Switching capacity and forwarding rate

All switches are wire-speed and nonblocking

  • Capacity in mpps (64-byte packets) : 130.94
  • Switching capacity (Gbps) : 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
    • Per-VLAN Spanning Tree Plus (PVST+) and Rapid PVST+ (RPVST+); 126 instances are supported
  • Port grouping/link aggregation
    • Support for IEEE 802.3ad Link Aggregation Control Protocol (LACP)
      • Up to 32 groups
      • Up to 8 ports per group with 16 candidate ports for each (dynamic) 802.3ad LAG
  • VLAN
    • Support for up to 4,094 active VLANs simultaneously; port-based and 802.1Q tag-based VLANs; MAC-based VLAN
    • Management VLAN
    • Private VLAN with promiscuous, isolated, and community port
    • Guest VLAN, unauthenticated VLAN, protocol-based VLAN, IP subnet-based VLAN, CPE VLAN
    • Dynamic VLAN assignment using RADIUS server along with 802.1x client authentication
  • Voice VLAN : Voice traffic is automatically assigned to a voice-specific VLAN and treated with appropriate levels of QoS. Auto voice capabilities deliver networkwide zero-touch deployment of voice endpoints and call control devices
  • Multicast TV VLAN : Multicast TV VLAN allows the single multicast VLAN to be shared in the network while subscribers remain in separate VLANs. This feature is also known as Multicast VLAN Registration (MVR)
  • VLAN translation : Support for VLAN One-to-One Mapping. In VLAN One-to-One Mapping, on an edge interface C-VLANs are mapped to S-VLANs and the original C-VLAN tags are replaced by the specified S-VLAN
  • Q-in-Q : VLANs transparently cross over a service provider network while isolating traffic among customers
  • Selective Q-in-Q
    • Selective Q-in-Q is an enhancement to the basic Q-in-Q feature and provides, per edge interface, multiple mappings of different C-VLANs to separate S- VLANs
    • Selective Q-in-Q also allows configuring of Ethertype (TPID) of the S-VLAN tag
    • Layer 2 protocol tunneling over Q-in-Q is also supported
  • GVRP/GARP : Generic VLAN Registration Protocol (GVRP) and Generic Attribute Registration Protocol (GARP) enable automatic propagation and configuration of VLANs in a bridged domain
  • Unidirectional Link Detection (UDLD) : UDLD monitors physical connection to detect unidirectional links caused by incorrect wiring or port faults to prevent forwarding loops and blackholing of traffic in switched networks
  • 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 4K 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
  • Loopback Detection : Loopback detection provides protection against loops by transmitting loop protocol packets out of ports on which loop protection has been enabled. It operates independently of STP

Layer 3

  • IPv4 routing
    • Wirespeed routing of IPv4 packets
    • Up to 7,168 routes and up to 256 IP interfaces
  • Wirespeed IPv6 static routing : Up to 1,792 routes and up to 256 IPv6 interfaces
  • Layer 3 interface : Configuration of Layer 3 interface on physical port, LAG, VLAN interface, or loopback interface
  • CIDR : Support for classless interdomain routing
  • RIP v2 : Support for Routing Information Protocol version 2 for dynamic routing
  • VRRP : 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
  • Policy-Based Routing (PBR) : Flexible routing control to direct packets to different next hop based on IPv4 or IPv6 ACL
  • IP Service-Level Agreement (SLA) object tracking
    • IP SLA object tracking relies on IP SLA ICMP echo operation to detect connectivity to a certain network destination
    • IP SLA object tracking for VRRP provides a mechanism to track the connectivity to the VRRP router default route next hop
    • IP SLA object tracking for static routes provides a mechanism to track the connectivity to the destination network via the next hop specified in the static route
  • DHCP server
    • Switch functions as an IPv4 DHCP server serving IP addresses for multiple DHCP pools/scopes
    • Support for DHCP options
  • DHCP relay at Layer 3 : 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


  • Hardware stack : Up to 8 units in a stack. Up to 400 ports managed as a single system with hardware failover
  • High availability : Fast stack failover delivers minimal traffic loss. Support link aggregation across multiple units in a stack
  • Plug-and-play stacking configuration/management
    • Master/backup for resilient stack control
    • Autonumbering
    • 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 high-speed 10G fiber and copper interfaces. Support LAG as stacking interconnects for even higher bandwidth
  • Hybrid stack : A mix of SF550X, SG550X, SG550XG, and SX550X in the same stack (10/100, Gigabit, and 10 Gigabit Ethernet)


  • SSH : SSH is a secure replacement for Telnet traffic. SCP also uses SSH. 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
  • IEEE 802.1X supplicant : A switch can be configured to act as a supplicant to another switch. This enables extended secure access in areas outside the wiring closet (such as conference rooms)
  • Web-based authentication : Web-based authentication provides network admission control through web browser to any host devices and operating systems
  • 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. This avoids accidental topology loops
  • STP Root Guard : This prevents edge devices not in the network administrator’s control from becoming Spanning Tree Protocol root nodes
  • STP loopback guard : Provides additional protection against Layer 2 forwarding loops (STP loops)
  • DHCP snooping : Filters out DHCP messages with unregistered IP addresses and/or from unexpected or untrusted interfaces. This prevents rogue devices from behaving as a DHCP server
  • 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. This prevents IP address spoofing
  • Dynamic ARP Inspection (DAI) : The switch discards ARP packets from a port if there are no static or dynamic IP/MAC bindings or if there is a discrepancy between the source or destination address in the ARP packet. This prevents man-in-the-middle attacks
  • IP/MAC/Port Binding (IPMB) : The preceding features (DHCP Snooping, IP Source Guard, and Dynamic ARP Inspection) work together to prevent DoS attacks in the network, thereby increasing network availability
  • Secure Core Technology (SCT) : Makes sure that the switch will receive and process management and protocol traffic no matter how much traffic is received
  • Secure Sensitive Data (SSD) : A mechanism to manage sensitive data (such as passwords, keys, and so on) securely on the switch, populating this data to other devices, and secure autoconfig. Access to view the sensitive data as plaintext or encrypted is provided according to the user-configured access level and the access method of the user
  • Trustworthy systems :
    • Trustworthy systems provide a highly secure foundation for Cisco products
    • Run-time defenses (Executable Space Protection [X-Space], Address Space Layout Randomization [ASLR], Built-In Object Size Checking [BOSC])
  • Private VLAN : Private VLAN provides security and isolation between switch ports, which helps ensure that users cannot snoop on other users’ traffic; supports multiple uplinks
  • Port security : Ability to lock source 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 : Denial-of-Service (DoS) attack prevention
  • Multiple user privilege levels in CLI : Level 1, 7, and 15 privilege levels
  • ACLs
    • Support for up to 2000 entries on SG550XG and SX550X models
    • Support for up to 3000 entries on all other models
    • Drop or rate limit based on source and destination MAC, VLAN ID or IPv4 or Pv6 address, IPv6 flow label, 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; ACL can be applied on both ingress and egress sides
    • 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 remarking 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 base; 2R3C policing
  • Congestion avoidance : A TCP congestion avoidance algorithm is required to minimize and prevent global TCP loss synchronization
  • iSCSI traffic optimization : A mechanism for giving priority to iSCSI traffic over other types of traffic


  • 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 802.3ae 10 Gbit/s Ethernet over fiber for LAN, IEEE 802.3an 10GBase-T 10 Gbit/s Ethernet over copper twisted pair cable, IEEE 802.3x Flow Control, 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, IEEE 802.1AB Link Layer Discovery Protocol, IEEE 802.3az Energy Efficient Ethernet, RFC 768, RFC 783, RFC 791, RFC 792, RFC 793, RFC 813, RFC 826, RFC 879, RFC 896, RFC 854, RFC 855, RFC 856, RFC 858, RFC 894, RFC 919, RFC 920, RFC 922, RFC 950, RFC 951, RFC 1042, RFC 1071, RFC 1123, RFC 1141, RFC 1155, RFC 1157, RFC 1213, RFC 1215, RFC 1286, RFC 1350, RFC 1442, RFC 1451, RFC 1493, RFC 1533, RFC 1541, RFC 1542, RFC 1573, RFC 1624, RFC 1643, RFC 1700, RFC 1757, RFC 1867, RFC 1907, RFC 2011, RFC 2012, RFC 2013, RFC 2030, RFC 2131, RFC 2132, RFC 2233, RFC 2576, RFC 2616, RFC 2618, RFC 2665, RFC 2666, RFC 2674, RFC 2737, RFC 2819, RFC 2863, RFC 3164, RFC 3176, RFC 3411, RFC 3412, RFC 3413, RFC 3414, RFC 3415, RFC 3416, RFC 4330


  • 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
    • DHCPv6 stateful client
    • 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
  • IPv6 First Hop Security
    • RA guard
    • ND inspection
    • DHCPv6 guard
    • Neighbor binding table (snooping and static entries)
    • Neighbor binding integrity check
  • 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 Autoconfiguration
    • 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


  • Web user interface
    • Built-in switch configuration utility for easy browser-based device configuration (HTTP/HTTPS).
    • Supports simple and advanced mode, configuration, wizards, customizable dashboard, system maintenance, monitoring, online help, and universal search
  • Smart Network Application (SNA) : An innovative network-level monitoring and management tool embedded in Cisco 250 to 550X Series switches. It can discover network topology, display link status, monitor events, apply configurations, and upgrade software images across multiple switches in the network
  • 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
    • rfc2925-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
    • draft-ietf-syslog-device-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-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
    • CISCOSB-iprouter-MIB
    • CISCOSB-ipv6-MIB
    • CISCOSB-mnginf-MIB
    • CISCOSB-lcli-MIB
    • CISCOSB-localization-MIB
    • CISCOSB-mcmngr-MIB
    • CISCOSB-localization-MIB
    • CISCOSB-mcmngr-MIB
    • CISCOSB-mng-MIB
    • CISCOSB-physdescription-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
    • CISCOSB-secsd-MIB
    • CISCOSB-draft-ietf-entmib-sensor-MIB
    • CISCOSB-draft-ietf-syslog-device-MIB
    • CISCOSB-rfc2925-MIB
    • CISCOSB-vrrpv3-MIB
    • CISCOSB-DebugCapabilities-MIB
    • CISCOSB-vlanVoice-MIB
    • CISCOSB-sysmng-MIB
    • CISCOSB-sct-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 or LAG 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
  • Flow-based redirection and mirroring : Redirect or mirror traffic to a destination port or mirroring session based on flow
  • Remote Switch Port Analyzer (RSPAN) : Traffic can be mirrored across Layer 2 domain to a remote port on a different switch for easier troubleshooting
  • sFlow agent : Switch can export sFlow sample to external collectors. sFlow provides visibility into network traffic down to flow level
  • DHCP (options 12, 66, 67, 82, 129, and 150) : DHCP options facilitate tighter control from a central point (DHCP server), to obtain IP address, autoconfiguration (with configuration file download), DHCP Relay, and host name
  • Autoconfiguration 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 are supported
  • Cloud services : Support for Cisco FindIT Network Manager and Active Advisor
  • Embedded FindIT Network Probe : Support for embedded FindIT Network Probe running on the switch. Eliminates the need to set up a separate hardware or virtual machine for the FindIT Network Probe on site
  • Cisco Network Plug and Play (PnP) agent
    • The Cisco Network PnP solution provides a simple, secure, unified, and integrated offering to ease new branch or campus device rollouts or for provisioning updates to an existing network. The solution provides a unified approach to provision Cisco routers, switches, and wireless devices with a near-zero-touch deployment experience
    • Supports Cisco PnP Connect
  • Localization : Localization of GUI and documentation into multiple languages
  • Login banner : Configurable multiple 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; Simple Network Time Protocol (SNTP); Xmodem upgrade; cable diagnostics; Ping; syslog; Telnet client; SSH client; automatic time settings from Management Station

Green (power efficiency)

  • Energy detect : Automatically turns power off on 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 shorter cables
  • EEE compliant (802.3az) : Supports IEEE 802.3az on all 10 Gigabit copper ports
  • Disable port LEDs : LEDs can be manually turned off to save on energy
  • Time-based PoE : PoE power can be on or off based on user-defined schedule to save energy


  • Jumbo frames : Frame sizes up to 9000 bytes. The default MTU is 2000
  • MAC table
    • 32,000 addresses on the SG550XG and SX550X models
    • 16,000 addresses on all other models


  • 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 : The switch advertises itself using the Cisco Discovery Protocol. It also learns the connected device and its characteristics using Cisco Discovery Protocol

Product specifications

  • Power over Ethernet : The following switches support 802.3at PoE+, 802.3af PoE, and Cisco prestandard (legacy) PoE on any of the RJ45 network ports. 60W PoE is also supported on selected RJ-45 network ports. Maximum power of 60W is delivered to any of the 60W PoE ports, and maximum power of 30W is delivered to any of the other RJ45 network ports, until the PoE budget for the switch is reached. The total power available for PoE per switch is as follows
    • Power dedicated to PoE : 382W
    • Number of ports that support PoE : 48 (16 support 60W PoE)
  • Power consumption (worst case)
    • Green power (mode) : EEE, Energy Detect, Short Reach
    • System power consumption : 110V=76.3W, 220V=76.9W
    • Power consumption (with PoE) : 110V=494.3W, 220V=483.1W
    • Heat dissipation (BTU/hr) : 1,686.62
  • Ports
    • Total system ports : 48x GE + 4x 10 GE
    • Network ports : 48x GE
    • Uplink ports : 2x 10 GE copper/SFP+ combo + 2x SFP+
  • Console port : Cisco Standard RJ-45 console port
  • OOB management port : Dedicated Gigabit management port for out-of-band management on SG550XG and SX550X models
  • RPS : RPS connector
  • USB slot : USB Type-A slot on the front panel of the switch for easy file and image management
  • Buttons : Reset button
  • Cabling type : Unshielded Twisted Pair (UTP) Category 5 or better; fiber options (SMF and MMF); coaxial SFP+
  • LEDs : System, master, fan, RPS, stack ID, link/speed per port
  • Flash : 256 MB
  • CPU
    • 1.3 GHz (dual-core) ARM for SX550X models
    • 800 MHz (dual-core) ARM for all other models
  • CPU memory : 512 MB
  • Packet buffer : All numbers are aggregate across all ports because the buffers are dynamically shared: 3 MB


  • Unit dimensions (W x H x D) : 440 x 44 x 350 mm (17.3 x 1.7 x 13.78 in)
  • Unit weight : 5.82 kg (12.83 lb)
  • 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 122°F (0° to 50°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

Acoustic noise and Mean Time Between Failures (MTBF)

  • Fan (number) : 3 + 1 (redundant)
  • Acoustic noise : 0°C - 25°C: 43.6dB, 50°C: 52.1dB
  • MTBF at 50°C (hours) : 159,129


Limited lifetime with next-business-day advance replacement (where available, otherwise same day ship)

Package contents

  • Cisco 550X Series Stackable Managed Switch
  • Power cord
  • Mounting kit included with all models
  • Console cable
  • Quick Start Guide

Minimum requirements

  • Web browser: Mozilla Firefox version 34 or later; Microsoft Internet Explorer version 9 or later, Chrome version 40 or later, Safari version 5 or later
  • Category 5 Ethernet network cable for 10/100 speeds at up to 100m; Category 5e Ethernet network cable for Gigabit speeds at up to 100m; Category 6a Ethernet network cable for 10 Gig speeds at up to 100m
  • TCP/IP, network adapter, and network operating system (such as Microsoft Windows, Linux, or Mac OS X) installed

Ordering information : Gigabit Ethernet

    • 48 x 10/100/1000 PoE+ ports with 382W power budget
    • 4 x 10 Gigabit Ethernet (2 x 10GBase-T/SFP+ combo + 2 x SFP+)