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Stacking Features:

IP Stacking
- Connects with stack member via Gigabit TP, SFP and 10G SFP+ interfaces
- Single IP address management, supporting up to 16 IP units stacked together
Hardware Stacking
- Virtualized multiple SGS-5240 switch series stacked into one logical device
- Connects with stack member via assigned 10G SFP+ interfaces
- Single IP address stack management, supporting up to 6 hardware units stacked together
- Stacking architecture supports redundant ring mode

IP Routing Features:

Layer 2 Features:

Supports VLAN
- IEEE 802.1Q tag-based VLAN
- Provider Bridging (VLAN Q-in-Q, IEEE 802.1ad) supported
- GVRP for dynamic VLAN management
- Protocol-based VLAN
- MAC-based VLAN
- IP subnet-based VLAN
- Voice VLAN
Supports Link Aggregation
- 802.3ad Link Aggregation Control Protocol (LACP)
- Cisco ether-channel (static trunk)
Supports Spanning Tree Protocol
- STP, IEEE 802.1D (Classic Spanning Tree Protocol)
- RSTP, IEEE 802.1w (Rapid Spanning Tree Protocol)
- MSTP, IEEE 802.1s (Multiple Spanning Tree Protocol, spanning tree by VLAN)
- Supports BPDU & root guard
Port mirroring to monitor the incoming or outgoing traffic on a particular port (many to one)
Supports G.8032 ERPS (Ethernet Ring Protection Switching)
Loop protection to avoid broadcast loops
Link Layer Discovery Protocol (LLDP)
Compatible with Cisco uni-directional link detection (UDLD) that monitors a link between two switches and blocks the ports on both ends of the link if the link fails at any point between the two devices

Quality of Service:

Input and output rate limit per port bandwidth control
8 priority queues on all switch ports
- IEEE 802.1p CoS/DSCP/IP Precedence
- VLAN ID
- ACL
- Policy-based ingress and egress QoS

Multicast:

Security:

Authentication
- IEEE 802.1x port-based/MAC-based network access authentication
- IEEE 802.1x authentication with guest VLAN
- Built-in RADIUS client to cooperate with the RADIUS servers
- RADIUS/TACACS+ users access authentication
- Guest VLAN assigns clients to a restricted VLAN with limited services
Access Control List
- IP-based Access Control List (ACL)
- MAC-based Access Control List (ACL)
- Time-based ACL
DHCP snooping to filter distrusted DHCP messages
Dynamic ARP Inspection discards ARP packets with invalid MAC address to IP address binding
IP Source Guard prevents IP spoofing attacks
IP address access management to prevent unauthorized intruder

Management:

IPv4 and IPv6 dual stack management
Switch Management Interfaces
- Console and Telnet Command Line Interface
- HTTP web switch management
- SNMP v1 and v2c switch management
- SSHv2, SSLv3 and SNMP v3 secure access
SNMP Management
- Four RMON groups (history, statistics, alarms, and events)
- SNMP trap for interface Link Up and Link Down notification
Built-in Trivial File Transfer Protocol (TFTP) client
BOOTP and DHCP for IP address assignment
System Maintenance
- Firmware upload/download via HTTP
- Reset button for system reboot or reset to factory default
- Dual images
DHCP Functions:
- DHCP Relay
- DHCP Option 82
- DHCP Server
User Privilege levels control
Network Time Protocol (NTP) and SNTP
Network Diagnostic
- SFP-DDM (Digital Diagnostic Monitor)
- Cable diagnostic technology provides the mechanism to detect and report potential cabling issues
- ICMPv6/ICMPv4 remote ping
Syslog remote alarm
System Log

Power over Ethernet:

Complies with IEEE 802.3at Power over Ethernet Plus
Up to 24 ports of IEEE 802.3at PoE devices powered
Auto detects powered device (PD)
Circuit protection prevents power interference between ports
Remote power feeding up to 100 meters
PoE management
- Total PoE power budget control
- Per port PoE function enable/disable
- PoE port power feeding priority
- PD classification detection

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