Chapter 1: Specifications
1. Specifications
1.1 Physical Characteristics
Aggregate Bandwidth — LGB5028A: 28 Gbps;
LGB5052A: 52 Gbps
Buffer Architecture — 1392 KB on-chip frame buffer
Network Interface — LGB5028A: Ports 1–20: RJ-45 connector (Auto MDI–X);
10BASE-T: RJ-45 (100-ohm, UTP cable, Category 3 or better);
100BASE-TX: RJ-45 (100-ohm, UTP cable, Category 5 or better);
1000BASE-T: RJ-45 (100-ohm, UTP or STP cable, Category 5, 5e, or 6), Ports 21–24: RJ-45 connector/(100/1000M) SFP;
Ports 25–28: 1G/10G SFP ports;
LGB5052A: Ports 1–44: RJ-45 connector (Auto MDI–X); 10BASE-T: RJ-45 (100-ohm, UTP cable, Category 3 or better); 100BASE-TX: RJ-45 (100-ohm, UTP cable, Category 5 or better); 1000BASE-T: RJ-45 (100-ohm, UTP or STP cable, Category 5, 5e, or 6,
Ports 45–48: RJ-45 connector/(100/1000M) SFP,
Ports 49–52: 1G/10G SFP ports
Ports — LGB5028A: (20) 10/100/1000 Mbps twisted-pair, (4) 100M/1G SFP combo ports, (4) 1G/10Gbps fiber ports; LGB5052A: (44) 10/100/100 Mbps twisted-pair, (4) 100M/1G SFP combo ports, (4) 1G/10Gbps fiber ports
Switching Database — 9K MAC address entries
Indicators — LEDs: System: Power; TP port: Status (LINK/ACT), 10/100/1000M;
SFP port: Status (LINK/ACT/SPD), 100/1000M
Temperature Tolerance — Operating: 32 to 104° F (0 to 40° C)
Humidity Tolerance — Operating: 5 to 90% (non-condensing)
Power — Input: 100–240 VAC, 50–60 Hz internal power supply;
Consumption: 60 watts maximum
Size — 1.8"H x 17.4"W x 11.8:D (4.4 x 44.2 x 30 cm)
Weight — LGB5028A: 8.6 lb. (3.9 kg);
LGB5052A: 9.1 lb. (4.1 kg)
1.2 Switch Features
Flow Control — Full duplex: IEEE 802.3x;
Half duplex: Backpressure
Forwarding Mode — Store-and-forward
Throughput — LGB5028A: 95.23 mpps (millions of packets per second) (64-byte packets), 128 Gbps (switching capacity); LGB5052A: 130.95 mpps (64-byte packets), 136 Gbps (switching capacity);
Jumbo Frames: Frame sizes up to 9 KB supported on Gigabit interfaces
1.3 Management Features
In-Band Management — SSH/SSL, Telnet, SNMP, or HTTP
Out-of-Band Management — RS-232 (RJ-45 console port)
Software Loading — HTTP, TFTP in-band, Console out-of-band
