S5821-03

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S5821-03 48-Port Multi-Gigabit PoE++ L3 Switch – Technical Specifications

Parameter Category	Specification Details
Model Number	S5821-03 (e.g., analogous to a PoE variant in the series)
Switch Type	Fully Managed Layer 3 PoE++ Switch
Ethernet Ports	48 x Multi-Gigabit RJ45 PoE++ ports (100M/1G/2.5G/5G/10G) 4 x 1G/10G SFP+ uplink slots (The “-03” often denotes a PoE-enabled version with Multi-Gig support)
PoE Budget	~740W – 1200W Total PoE Budget • IEEE 802.3af (PoE): Up to 15.4W per port • IEEE 802.3at (PoE+): Up to 30W per port • IEEE 802.3bt (PoE++): Up to 60W (Type 3) or 90W+ (Type 4) per port • Auto PoE Power Negotiation & Priority
Switching Capacity	~960 Gbps (non-blocking) Calculated to handle 48x10G + 4x10G at line rate.
Forwarding Rate	~720 Mpps (Million packets per second)
MAC Address Table	64K entries
Packet Buffer Memory	16 MB+
Jumbo Frame Support	12KB
Layer 2 Features	• STP/RSTP/MSTP • 802.1Q VLAN (4K VLAN groups) • Port Mirroring (Many-to-1) • Link Aggregation (LACP, 802.3ad) • IGMP Snooping (v1/v2/v3) • Loopback Detection
Layer 3 Features	Static Routing: IPv4/IPv6 Dynamic Routing: • OSPFv2 • RIP (Note: May lack full BGP/IS-IS for complex core routing) Multicast: • IGMP v3 • PIM-SM
Quality of Service (QoS)	• 8 priority queues per port • Advanced classification based on: 802.1p, DSCP, IP/MAC/Port • SP/WRR/SP+WRR queuing scheduling • Strict priority for real-time voice/video traffic
Security Features	• Port Security (MAC address binding) • 802.1X Port-Based/MAC-Based Authentication • ACL (Access Control List) – L2/L3/L4 • DoS (Denial of Service) attack protection • DHCP Snooping • IP-MAC-Port Binding (IMPB)
Management & Automation	CLI: Console port (RJ45), Telnet, SSH Web GUI: HTTP/HTTPS (SSL) Network Management: SNMP (v1/v2c/v3), sFLOW Automation: RESTful API, NETCONF/YANG (on newer models)
Hardware Details	Power Supply: Dual, hot-swappable, high-output power supplies (e.g., 1100W each) for full PoE redundancy. Power Consumption: Directly correlates to massive PoE load; Idle consumption ~100W. Cooling: Robust, multi-fan, hot-swappable cooling system designed for extreme heat dissipation from PoE. Dimensions (W x D x H): Often 1U or 2U rack height.
Operating Temperature	0°C to 40°C (32°F to 104°F)
Operating Humidity	10% to 90% non-condensing
Certifications	CE, FCC, RoHS