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Performance |
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Switching capacity and forwarding rate |
Capacity in millions of packets per second (mpps) (64-byte packets): 9.52 |
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All switches are wire-speed and nonblocking |
Switching capacity in gigabits per second (Gbps): 12.8 |
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Ports |
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Total system ports |
24 Fast Ethernet +
4 Gigabit Ethernet |
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RJ-45 ports |
24 Fast Ethernet |
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Combo ports (RJ-45 + SFP) |
2 Gigabit Ethernet combo + 2 SFP |
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USB slot |
USB Type-A slot on the front panel of the switch for easy file and image management |
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Buttons |
Reset button |
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Cabling type |
Unshielded Twisted Pair (UTP) Category 5 or better for 10BASE-T/100BASE-TX; UTP Category 5e or better for 1000BASE-T |
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LEDs |
System, Link/Act, PoE, Speed |
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Flash |
256 MB |
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CPU |
800 MHz ARM |
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CPU memory |
512 MB |
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Layer 2 switching |
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Spanning Tree Protocol (STP) |
Standard 802.1d spanning tree support
Fast convergence using 802.1w (Rapid Spanning Tree Protocol [RSTP]), enabled by default
Multiple spanning tree instances using 802.1s (MSTP); 8 instances are supported |
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VLAN |
Support for up to 256 active VLANs simultaneously
Port-based and 802.1Q tag-based VLANs
Management VLAN
Guest VLAN |
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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 |
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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 4K multicast groups (source-specific multicasting is also supported) |
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HOL blocking |
Head-Of-Line (HOL) blocking |
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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 |
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Layer 3 routing |
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IPv4 routing |
Wire-speed routing of IPv4 packets
Up to 32 static routes and up to 16 IP interfaces |
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IPv6 routing |
Wire-speed routing of IPv6 packets |
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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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Classless Interdomain Routing (CIDR) |
Support for CIDR |
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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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Security |
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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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Secure Shell (SSH) Protocol |
SSH is a secure replacement for Telnet traffic. Secure Copy (SCP) also uses SSH. SSH v1 and v2 are supported |
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IEEE 802.1X (authenticator role) |
RADIUS authentication, guest VLAN, single/multiple host mode, and single/multiple sessions |
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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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Port security |
Ability to lock source MAC addresses to ports and limit the number of learned MAC addresses |
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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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STP loopback guard |
Provides additional protection against Layer 2 forwarding loops (STP loops) |
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Quality of service |
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Priority levels |
8 hardware queues |
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Scheduling |
Strict priority and Weighted Round-Robin (WRR) queue assignment based on DSCP and class of service (802.1p/CoS) |
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Class of service |
Port based; 802.1p VLAN priority based; IPv4/v6 IP precedence/Type of Service (ToS)/DSCP based; Differentiated Services (DiffServ); classification and re-marking ACLs, trusted QoS |
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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 reduce 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), IEEE 802.1Q/p VLAN |
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IPv6 |
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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 applications |
Web/SSL, Telnet server/SSH, Ping, Traceroute, Simple Network Time Protocol (SNTP), Trivial File Transfer Protocol (TFTP), Simple Network Management Protocol (SNMP), Remote Authentication Dial-In User Service (RADIUS), Syslog, DNS client, DHCP client, DHCP autoconfig |
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Environmental |
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Unit dimensions (W x H x D) |
440 x 44 x 202 mm (17.3 x 1.45 x 7.95 in) |
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Unit weight |
2.72 kg (6 lb) |
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Power |
100 to 240V, 50 to 60 Hz |
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Operating temperature |
32° to 122°F (0° to 50°C) |