Extreme Networks B5K125-48P2 Gigabit PoE+ Stackable Managed Switch

Technical SpecificationsModel:B5K125-48P2 Brand:Extreme Networks Product Type:1U rackmount stackable Layer2/Layer3 PoE+ access switch Ports:48 × 10/100/1000BASE-T PoE+ RJ45 ports,2 × combo SFP slots,2 × SFP+ 10G uplink slots,2 × dedicated 12G stacking ports PoE standard:IEEE 802.3at PoE+, up to 30W per port Switching capacity:184 Gbps Forwarding rate:137 Mpps MAC address table:32000 entries VLAN:4094 VLAN IDs Redundancy:Supports external EPS-C2 redundant power supply Operating temperature:0℃ ~ +40℃ Storage temperature:-40℃ ~ +70℃ Relative humidity:10%~90%, non-condensing Weight:6.8 kg

System compatibilityB5K125-48P2 belongs to Extreme Networks B5 stackable switch family, formerly Enterasys. Up to 8 B5 switches can be stacked as one virtual switch. Compatible with Extreme validated 1G SFP and 10G SFP+ transceivers, fiber patch cords and DAC cables. Widely used for enterprise campus high-density PoE deployments for wireless APs and IP cameras.

FunctionB5K125-48P2 is a high-performance L3 managed PoE+ access switch. It supports static routing, VLAN segmentation, STP/RSTP/MSTP, LACP link aggregation, ACL, QoS, IPv4/IPv6 multicast and SNMP monitoring. It automatically detects powered devices and manages PoE power budget. It monitors port link status, transceiver DDM optical data, chassis temperature, fan speed and power supply health. Used for building large-scale stacked resilient PoE access networks.

InstallationMount the switch on 19-inch 1U rack. Connect AC power cord; external EPS-C2 redundant power supply is optional. Insert SFP/SFP+ transceivers for uplink. Connect Cat5e/Cat6 cables to PoE+ RJ45 ports. Connect DB9 serial console port for EOS configuration. Verify boot sequence, port link and PoE status before putting into production.

Interface48×PoE+ RJ45 gigabit ports,2×combo SFP slots,2×10G SFP+ slots,2×dedicated stacking ports,DB9 serial console port,status LEDs,AC power inlet,RPS connector,rack mounting ears for Extreme Networks B5K125-48P2.

FeatureOriginal Extreme Networks B5 series 1U rackmount 48-port PoE+ gigabit stackable Layer3 switch,10G uplink capability,high-speed dedicated stacking ports,transceiver DDM monitoring,external redundant power support,EOS operating system,built-in self-diagnostic function. This spare supports enterprise campus high-density wireless AP and IP camera access network deployment.

DiagnosticSwitch fails to boot: check AC power cord and wall power supply. PoE port no power: verify PD detection, total PoE budget and port enable status. Port link down: check Cat5e/Cat6 cable, SFP/SFP+ transceiver and port admin status. Transceiver no DDM data: confirm Extreme validated pluggable transceiver. Stacking failure: verify consistent firmware version among stacked B5 switches. Over-temperature alarm: inspect chassis ventilation and clear dust.

Product BriefB5K125-48P2 is Extreme Networks 1U rackmount 48-port gigabit PoE+ stackable Layer3 managed switch with 2×combo SFP,2×10G SFP+ uplink and dedicated stacking ports,classic spare part for enterprise high-density PoE wiring closet network overhaul.

DisclaimerAll parameters are for reference only and shall not be used as the basis for quotation. Goods are scarce, overseas delivery lead time is 3-7 working days. It is only used for equipment maintenance and renovation.