Cisco 28-Port Gigabit PoE Managed Switch (SG350-28P)

Switching Capacity

Capacity in Millions of Packets per Second (64-byte packets)

41.67 mpps

Switching Capacity in Gigabits per Second

USB Slot

For file-management purposes

Layer 2 Switching

Spanning Tree Protocol

Standard 802.1d Spanning Tree support

Fast convergence using 802.1w (Rapid Spanning Tree [RSTP]), enabled by default

8 instances are supported

Multiple Spanning Tree instances using 802.1s (MSTP)

Port Grouping

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 link aggregation

VLAN

Support for up to 4096 VLANs simultaneously

Port-based and 802.1Q tag-based VLANs

MAC-based VLAN

Management VLAN

Private VLAN Edge (PVE), also known as protected ports, with multiple uplinks

Guest VLAN

Unauthenticated VLAN

Dynamic VLAN assignment via RADIUS server along with 802.1x client authentication

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 TV VLAN allows the single multicast VLAN to be shared in the network while subscribers remain in separate VLANs (also known as MVR)

Q-in-Q VLAN

VLANs transparently cross a service provider network while isolating traffic among customers

Generic VLAN Registration Protocol (GVRP)/Generic Attribute Registration Protocol (GARP)

Protocols for automatically propagating and configuring VLANs in a bridged domain

Unidirectional Link Detection (UDLD)

UDLD monitors physical connection to detect unidirectional links caused by incorrect wiring or cable/port faults to prevent forwarding loops and blackholing of traffic in switched networks

Dynamic Host Configuration Protocol (DHCP) Relay at Layer 2

Relay of DHCP traffic to DHCP server in different VLAN; works with DHCP Option 82

Internet Group Management Protocol (IGMP) versions 1, 2, and 3 snooping

IGMP limits bandwidth-intensive multicast traffic to only the requesters; supports 1K 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

Head-of-line (HOL) blocking

HOL blocking prevention

Jumbo frames

Up to 9K (9216) bytes

Layer 3 Routing

IPv4 routing

Wirespeed routing of IPv4 packets

Up to 512 static routes and up to 128 IP interfaces

Classless Interdomain Routing (CIDR)

Support for CIDR

Layer 3 Interface

Configuration of Layer 3 interface on physical port, LAG, VLAN interface, or loopback interface

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

DHCP Server

Switch functions as an IPv4 DHCP server serving IP addresses for multiple DHCP pools/scopes

Support for DHCP options

Security

Secure Shell (SSH) Protocol

SSH is a secure replacement for Telnet traffic. SCP also uses SSH. SSH v1 and v2 are supported

Secure Sockets Layer (SSL)

SSL support: Encrypts all HTTPS traffic, allowing highly secure access to the browser-based management GUI in the switch

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

Supports time-based 802.1X

Dynamic VLAN assignment

Web-based authentication

Web based authentication provides network admission control through web browser to any host devices and operating systems

STP Bridge Protocol Data Unit (BPDU) Guard

A security mechanism to protect the network from invalid configurations. A port enabled for BPDU Guard is shut down if a BPDU message is received on that port

STP Root Guard

This prevents edge devices not in the network administrator's control from becoming Spanning Tree Protocol root nodes

DHCP snooping

Filters out DHCP messages with unregistered IP addresses and/or from unexpected or untrusted interfaces. This prevents rogue devices from behaving as DHCP Servers

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 addresses 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

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

Port security

The ability to lock source MAC addresses to ports and limits the number of learned MAC addresses

RADIUS/TACACS+

Supports RADIUS and TACACS authentication. Switch functions as a client

Storm control

Broadcast, multicast, and unknown unicast

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

DoS prevention

Denial-of-service (DOS) attack prevention

ACLs

Support for up to 512 rules

Drop or rate limit based on source and destination MAC, VLAN ID or IP address, protocol, port, differentiated services code point (DSCP)/IP precedence, TCP/UDP source and destination ports, 802.1p priority, Ethernet type, Internet Control Message Protocol (ICMP) packets, IGMP packets, TCP flag, time-based ACLs supported.

Quality of Service (QoS)

Priority levels

8 hardware queues

Scheduling

Strict priority and weighted round-robin (WRR)

Queue assignment based on DSCP and class of service (802.1p/CoS)

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 remarking ACLs, trusted QoS

Rate limiting

Ingress policer; egress shaping and rate control; per VLAN, per port, and flow based

Congestion avoidance

A TCP congestion avoidance algorithm is required to minimize and prevent global TCP loss synchronization.

Standards

IEEE 802.3 10BASE-T Ethernet, IEEE 802.3u 100BASE-TX Fast Ethernet, IEEE 802.3ab 1000BASE-T Gigabit Ethernet, IEEE 802.3ad LACP, IEEE 802.3z Gigabit Ethernet, IEEE 802.3x Flow Control, IEEE 802.1D (STP, GARP, and GVRP), IEEE 802.1Q/p VLAN, IEEE 802.1w RSTP, 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 1042, RFC 1071, RFC 1123, RFC 1141, RFC 1155, RFC 1157, RFC 1350, RFC 1533, RFC 1541, 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 maximum transmission unit (MTU) discovery

Duplicate address detection (DAD)

ICMP version 6

IPv6 over IPv4 network with Intrasite Automatic Tunnel Addressing Protocol

(ISATAP) 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, Simple Network Time Protocol (SNTP), Trivial File Transfer Protocol (TFTP), SNMP, RADIUS, syslog, DNS client, Telnet Client, DHCP Client, DHCP Autoconfig, IPv6 DHCP Relay, TACACS

IPv6 RFCs supported

RFC 4443 (which obsoletes RFC2463): ICMP version 6

RFC 4291 (which obsoletes RFC 3513): IPv6 address architecture

RFC 4291: IPv6 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

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 version 3 user-based security model (USM)

Remote Monitoring (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 upgrade over SCP running over SSH

● 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. A single session is supported

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

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 hostname

Secure Copy (SCP)

Securely transfer files to and from the switch

Autoconfiguration with Secure Copy (SCP) file download

Enables secure mass deployment with protection of sensitive data

Text-editable config files

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

Applies the intelligence delivered through the Smartport roles and applies it automatically to the port based on the devices discovered over Cisco Discovery Protocol or LLDP-MED. This facilitates zero-touch deployments

Textview CLI

Scriptable command-line interface. A full CLI as well as a menu-based CLI is supported. User privilege levels 1, 7, and 15 are supported for the CLI

Cloud services

Support for Cisco Small Business FindIT Network

Localization

Localization of GUI and documentation into multiple languages

Other management

Traceroute; single IP management; HTTP/HTTPS; SSH; RADIUS; port mirroring; TFTP upgrade; DHCP client; BOOTP; SNTP; Xmodem upgrade; cable diagnostics; ping; syslog; Telnet client (SSH secure support)

Time-based port operation

Link up or down based on user-defined schedule (when the port is administratively up)

Login banner

Configurable multiple banners for web as well as CLI

Power Efficiency

EEE Compliant (802.3az)

Supports 802.3az on all copper ports

Energy Detect

Automatically turns power off on Gigabit Ethernet and 10/100 RJ-45 port when detecting link down

Active mode is resumed without loss of any packets when the switch detects the link up

Cable length detection

Adjusts the signal strength based on the cable length for Gigabit Ethernet models. Reduces the power consumption for cables shorter than 10m.

Disable port LEDs

LEDs can be manually turned off to save on energy

General

Jumbo frames

Frame sizes up to 9K (9216) bytes supported on 10/100 and Gigabit interfaces

MAC table

Up to 16K (16384) MAC addresses

Discovery

Bonjour

The switch advertises itself using the Bonjour protocol

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

Cisco Discovery Protocol

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

Power

Green Power (Mode)

Energy detect short reach

System Power Consumption

110 V=19.7 W

220 V=19.9 W

Head Dissipation

16.4 BTU/hr

Ports

Total System Ports

28 x Gigabit Ethernet ports

RJ-45 Ports

24 x Gigabit Ethernet ports

Combo Ports (RJ-45+SFP)

2 SFP slots, 2 Gigabit Ethernet combo

Buttons

Reset buttons

Cabling Type

Unshielded twisted pair (UTP) Category 5 or better for 10BASE-T/100BASE-TX; UTP Category 5

Ethernet or better for 1000BASE-T

LEDs

System, Link/Act, PoE, Speed, LED power saving option

Flash

32 MB

CPU Memory

256 MB

Packet Buffer

12 Mb

Power

100-240 V, 50/60 Hz, 2.0 A, external

Certifications

UL (UL 60950), CSA (CSA 22.2), CE mark, FCC Part 15 (CFR 47) Class A

Temperature & Humidity

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, non-condensing

Storage Humidity: 10 to 90% relative, non-condensing

Fan

Fanless design

MTBF

367,209 hours @ 104°F / 40°C

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 on each computer in the network

Dimensions

17.30 x 1.45 x 10.10" / 440.00 x 44.45 x 202.00 mm

Weight

6.06 lb / 2.75 kg