Performance | |
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Capacity in mpps (64-byte packets) | |
Switching Capacity (Gbps) | |
Layer 2 Switching | |
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Spanning Tree Protocol (STP) | Standard 802.1d Spanning Tree support |
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| Fast convergence using 802.1w (Rapid Spanning Tree [RSTP]), enabled by default |
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| Multiple spanning tree instances using 802.1s (MSTP). 16 instances are supported |
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Port grouping | Support for IEEE 802.3ad Link Aggregation Control Protocol (LACP) |
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| Up to 8 ports per group with 16 candidate ports for each (dynamic) 802.3ad LAG |
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VLAN | Support for up to 4096 VLANs simultaneously Port-based and 802.1Q tag-based |
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| PVE (Private VLAN Edge), also known as Protected Port, with multiple uplinks |
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| Guest VLAN Unauthenticated VLAN Protocol-based VLAN CPE VLAN |
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| Dynamic VLAN assignment via Radius server along with 802.1x client authentication |
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Voice VLAN | Voice traffic is automatically assigned to a voice-specific VLAN and treated |
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| with appropriate levels of QoS. Auto voice capabilities deliver network-wide |
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| zero touch deployment of voice endpoints and call control devices |
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Multicast TV VLAN | Multicast TV VLAN allows the single multicast VLAN to be shared |
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| in the network while subscribers remain in separate VLANs (Also known as MVR) |
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Q-in-Q VLAN | VLANs transparently cross a service provider network while isolating traffic |
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GVRP/GARP | Generic VLAN Registration Protocol (GVRP) and Generic Attribute RegistrationProtocol |
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| enable automatic propagation and configuration of VLANs in a bridged domain. |
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Unidirectional Link Detection (UDLD) | UDLD monitors physical connection to detect unidirectional links caused |
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| by incorrect wiring or cable/port faults to prevent forwarding loops and blackholing of traffic |
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DHCP Relay at Layer 2 | Relay of DHCP traffic to DHCP server in different VLAN. |
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| Works with DHCP Option 82 |
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IGMP (versions 1, 2, and 3) snooping | Internet Group Management Protocol (IGMP) limits bandwidth-intensive multicast traffic to only the requesters; supports 1K (1024) and 4K (for SG500X in native mode) multicast groups (source-specific multicasting is also supported). |
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IGMP Querier | IGMP querier is used to support a Layer 2 multicast domain of snooping switches in the absence of a multicast router |
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HOL blocking | Head-of-line (HOL) blocking. |
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Jumbo Frames | Frames up to 9K (9216) bytes in length. |
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Layer 3 | |
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IPv4 routing | Wirespeed routing of IPv4 packets |
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| Up to 2K (2048) static routes and up to 256 IP interfaces |
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Wirespeed IPv6 Static Routing | Up to 2K (2048) static routes and up to 128 IPv6 interfaces |
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Layer 3 Interface | Configuration of layer 3 interface on physical port, LAG, VLAN interface or Loopback interface |
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CIDR | Support for Classless Inter-Domain Routing |
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RIP v2 (on 500X) | Support for Routing Information Protocol version 2, for dynamic routing |
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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. |
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DHCP Server | Switch functions as an IPv4 DHCP Server serving IP addresses for multiple DHCP pools/scopes |
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DHCP relay at Layer 3 | Relay of DHCP traffic across IP domains |
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User Datagram Protocol (UDP) relay | Relay of broadcast information across Layer 3 domains for application discovery or relaying of BOOTP/DHCP packets. |
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Stacking | |
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Hardware stack | Up to 8 units in a stack. Up to 416 ports managed as a single system with hardware failover. |
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High availability | Fast stack failover delivers minimal traffic loss. |
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Plug-and-play stacking configuration/management | Master/backup for resilient stack control |
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| Hot swap of units in stack |
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| Ring and chain stacking options Auto stacking port speed Flexible stacking port options |
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High-speed stack interconnects | Cost-effective 5G copper and high-speed 10G Fiber and Copper interfaces. |
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Hybrid stack | A mix of SF500, SG500, and SG500X in the same stack (10/100, Gigabit, and 10 Gigabit) |
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Security | |
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SSH | SSH is a secure replacement for Telnet traffic. SCP also uses SSH. SSH versions 1 and 2 are supported. |
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SSL | Secure Sockets Layer (SSL) encrypts all HTTPS traffic, allowing secure access to the browser-based management GUI in the switch. |
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IEEE 802.1X (Authenticator role) | 802.1X: RADIUS authentication and accounting, MD5 hash; guest VLAN; unauthenticated VLAN, single/multiple host mode and single/multiple sessions |
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| Supports time-based 802.1X Dynamic VLAN assignment |
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Web Based Authentication | Web based authentication provides network admission control through web browser to any host devices and operating systems. |
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STP Bridge Protocol Data Unit (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. |
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STP Root Guard | This prevents edge devices not in the network administrator’s control from becoming Spanning Tree Protocol root nodes. |
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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. |
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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. |
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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. This prevents man-in-the-middle attacks. |
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IP/Mac/Port Binding (IPMB) | The features (DHCP Snooping, IP Source Guard, and Dynamic ARP Inspection) above work together to prevent DOS attacks in the network, thereby increasing network availability. |
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Secure Core Technology (SCT) | Ensures that the switch will receive and process management and protocol traffic no matter how much traffic is received. |
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Secure Sensitive Data (SSD) | A mechanism to manage sensitive data (such as passwords, keys, etc) 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. |
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Layer 2 isolation Private VLAN Edge (PVE) with community VLAN | PVE (also known as protected ports) provides Layer 2 isolation between devices in the same VLAN, supports multiple uplinks. |
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Port security | The ability to lock Source MAC addresses to ports, and limits the number of learned MAC addresses. |
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RADIUS/TACACS+ | Supports RADIUS and TACACS authentication. Switch functions as a client. |
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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. |
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Storm control | Broadcast, multicast, and unknown unicast |
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DoS prevention | Denial-of-Service (DOS) attack prevention |
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Multiple user privilege levels in CLI | Levels 1, 7, and 15 privilege levels. |
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ACLs | Support for up to 2K (2048) rules on 500 Series and 3K (3072) on 500X series. |
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| Drop or rate limit based on source and destination MAC, VLAN ID or 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. |
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| Time-based ACLs supported. |
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Quality of Service | |
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Priority levels | |
Scheduling | Strict Priority and weighted round-robin (WRR) |
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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 |
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| Queue assignment based on differentiated services code point (DSCP) and class of service (802.1p/CoS) |
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Rate limiting | Ingress policer; egress shaping and rate control; per VLAN, per port, and flow based |
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Congestion avoidance | A TCP congestion avoidance algorithm is required to minimize and prevent global TCP loss synchronization. |
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Standards | |
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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 |
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IPv6 | |
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IPv6 | |
| IPv6 over Ethernet Dual IPv6/IPv4 stack |
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| IPv6 neighbor and router discovery (ND) IPv6 stateless address auto-configuration |
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| Path maximum transmission unit (MTU) discovery |
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| Duplicate address detection (DAD) ICMP version 6 |
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| IPv6 over IPv4 network with Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) support |
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| USGv6 and IPv6 Gold Logo certified |
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IPv6 QoS | Prioritize IPv6 packets in hardware |
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IPv6 ACL | Drop or rate limit IPv6 packets in hardware |
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IPv6 First Hop Security | |
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| Neighbor binding table (Snooping and static entries) |
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| Neighbor binding integrity check |
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Multicast Listener Discovery (MLD v1/2) snooping | Deliver IPv6 multicast packets only to the required receivers |
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IPv6 applications | Web/SSL, Telnet Server/SSH, Ping, Traceroute, SNTP, TFTP, SNMP, RADIUS, Syslog, DNS client, DHCP Client, DHCP Autoconfig, IPv6 DHCP Relay, TACACS |
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IPv6 RFCs supported | RFC 4443 (which obsoletes RFC2463) – ICMP version 6 |
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| RFC 4291 (which obsoletes RFC 3513) – IPv6 address architecture |
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| RFC 4291 – IPv6 addressing architecture |
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| RFC 2460 – IPv6 specification |
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| RFC 4861 (which obsoletes RFC 2461) – Neighbor discovery for IPv6 |
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| RFC 4862 (which obsoletes RFC 2462) – IPv6 stateless address auto-configuration |
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| RFC 1981 – Path MTU discovery |
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| RFC 4007 – IPv6 scoped address architecture |
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| RFC 3484 – Default address selection mechanism |
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| 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 |
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Management | |
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Web user interface | Built-in switch configuration utility for easy browser-based device configuration (HTTP/HTTPS). Supports configuration, system dashboard, system maintenance, and monitoring. |
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SNMP | SNMP versions 1, 2c, and 3 with support for traps, and SNMP version 3 user-based security model (USM) |
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Remote Monitoring (RMON) | Embedded RMON software agent supports 4 RMON groups (history, statistics, alarms, and events) for enhanced traffic management, monitoring, and analysis |
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IPv4 and IPv6 dual stack | Coexistence of both protocol stacks to ease migration |
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Firmware upgrade | Web browser upgrade (HTTP/HTTPS) and TFTP and upgrade over SCP running over SSH |
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| Upgrade can be initiated through console port as well |
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| Dual images for resilient firmware upgrades |
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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. A single session is supported. |
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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. A single session is supported. |
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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 hostname. |
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Secure Copy (SCP) | Securely transfer files to and from the switch |
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Autoconfiguration with Secure Copy (SCP) file download | Enables secure mass deployment with protection of sensitive data |
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Text-editable config files | Config files can be edited with a text editor and downloaded to another switch, facilitating easier mass deployment |
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Smartports | Simplified configuration of QoS and security capabilities |
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Auto Smartports | Applies the intelligence delivered through the Smartport roles and applies it automatically to the port based on the devices discovered over CDP or LLDP-MED. This facilitates zero touch deployments |
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Textview CLI | Scriptable CLI. A full CLI as well as a menu CLI is supported. |
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Cloud services | Support for Cisco Small Business FindIT Network and Cisco OnPlus |
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Localization | Localization of GUI and documentation into multiple languages |
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Login banner | Configurable multiple banners for web as well as CLI. |
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Time-based port operation | Link up or down based on user-defined schedule (when the port is administratively up). |
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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. |
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Power Efficiency | |
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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. |
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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. |
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EEE compliant (802.3az) | Supports IEEE 802.3az on all Gigabit copper ports. |
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Disable port LEDs | LEDs can be manually turned off to save on energy. |
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General | |
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Jumbo frames | Frame sizes up to 9K (9216) bytes. Supported on 10/100 and Gigabit Ethernet interfaces. The default MTU is2K. |
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MAC table | 16K (16384) MAC addresses. |
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Discovery | |
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Bonjour | The switch advertises itself using the Bonjour protocol. |
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Link Layer Discovery Protocol (LLDP) (802.1ab) with LLDP-MED extensions | 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. |
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Cisco Discovery Protocol (CDP) | The switch advertises itself using the Cisco Discovery Protocol. It also learns the connected device and its characteristics via CDP. |
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Power over Ethernet (PoE) | |
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Power Dedicated to PoE | |
Number of Ports That Support PoE | |
Power consumption (worst case) | |
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Power Savings Mode | |
| |
System Power Consumption | |
| |
Power Consumption (with PoE) | |
Heat Dissipation Worst Case (BTU/hr) | |
Ports | |
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Total System Ports | 24GE + 4 GE (5G Stacking) |
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RJ-45 Ports | |
Combo Ports (RJ-45 + SFP) | |
Buttons | |
Cabling type | Unshielded twisted pair (UTP) Category 5 or better; Fiber options (SMF and MMF); Coaxial SFP+ |
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| |
LEDs:LED power savings, System, Link/Act, PoE, Speed | |
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Flash | |
CPU memory | |
Packet buffer | All numbers are aggregate across all ports as the buffers are dynamically shared |
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| |
Environmental | |
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Dimensions (W x H x D) | |
Unit weight | |
Power | 100–240V 47–63 Hz, internal, universal |
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Certification | UL (UL 60950), CSA (CSA 22.2), CE mark, FCC Part 15 (CFR 47) Class A |
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Operating temperature | |
Storage temperature | -4°to 158°F (-20°to 70°C) |
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Operating humidity | 10% to 90%, relative, noncondensing |
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Storage humidity | 10% to 90%, relative, noncondensing |
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Acoustic Noise and MTBF | |
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FAN (Number) | |
Acoustic Noise | |
MTBF @40°C (hr) | |
Ordering Info | |
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SG500-28 | Switch 24x G-bit Port + 2xG-bit Combo + 2x 1G/5G |
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