Extreme Networks B5K125-24P2 Gigabit PoE+ Managed Switch

Technical SpecificationsModel：B5K125-24P2 Brand：Extreme Networks (Enterasys legacy) Product Type：1U rackmount Layer2/Layer3 managed PoE switch

Ports:

• 24 ×10/100/1000BASE-T PoE+ RJ45 copper ports, IEEE802.3at PoE+, max 30W per port

• 2 ×combo 1G SFP gigabit fiber slots

• 2 ×10G SFP+ uplink slots

• 2 ×12G dedicated high-speed stacking ports

• 1 ×RJ45 serial console port

• External RPS redundant power connector

Switching capacity：128Gbps Forwarding rate：95Mpps MAC address table：32000 entries Jumbo frame：9216 bytes PoE power budget：370W Stacking：High-speed 12G stacking within B5 series OS：Enterasys firmware / ExtremeXOS compatible, local CLI/web management

Power & fan：Built-in AC power supply, support external RPS redundant power, variable-speed smart fan,front-to-back airflow Operating temperature：0℃ ~ +40℃ Storage temperature：-40℃ ~ +70℃ Relative humidity：10%~90%, non-condensing Weight：6.10kg

System compatibility

B5K125-24P2 belongs to legacy Enterasys B5 stackable edge switch family under Extreme Networks. Compatible with Enterasys / Extreme validated 1G SFP and 10G SFP+ optical transceivers. Supports stacking with other B5 series switches, can be managed via local CLI or web GUI. Widely used for enterprise campus, branch office PoE access for Wi-Fi APs, IP surveillance cameras and IP phones spare replacement.

Function

B5K125-24P2 is high-performance stackable Layer3 gigabit PoE+ edge switch. 24 PoE+ copper ports deliver data and power to powered end terminals. Dual combo SFP ports provide gigabit fiber uplink; two SFP+ ports support 10G high-speed uplink to aggregation layer. Dual 12G stacking ports enable multiple switches to form a unified stacking group. It supports static routing,VLAN,STP/RSTP,LACP link aggregation,ACL,QoS and multicast snooping. It monitors port link state,PoE power consumption,system temperature and fan health, and generates hardware fault alarms. Used for enterprise wiring closet stackable PoE access networks.

Installation

Mount the switch on standard 19-inch 1U rack. Connect AC power cable, external RPS power supply can be connected for power redundancy. Insert SFP/SFP+ transceivers and fiber patch cords for fiber uplink. Connect stacking cables for multi-unit stacking deployment. Connect console port for initial configuration. Verify boot,port link,PoE output and stacking function before commissioning.

Interface24×PoE+ RJ45 ports,2×combo GE SFP slots,2×SFP+ 10G uplink slots,2×12G stacking ports,RJ45 serial console,status LEDs,reset button,AC power inlet,RPS connector,ground terminal,rack mounting ears for Extreme Networks B5K125-24P2.

FeatureOriginal Enterasys B5 series 1U rackmount gigabit PoE+ Layer3 stackable switch,24 802.3at PoE+ ports plus combo GE SFP and dual 10G SFP+ uplink slots,12G high-speed stacking interface,support external redundant power supply,smart fan cooling,built-in self-diagnostic function. This spare fits enterprise edge stacking PoE network upgrade and maintenance.

DiagnosticSwitch fails to boot: Check AC power input and power supply health. PoE port no power: Verify PoE budget,PD device classification and port admin status. Copper port link down: Inspect RJ45 cable quality and auto-negotiation settings. SFP/SFP+ port no link: Check transceiver,fiber cable and port configuration. Low optical power alarm: Dirty fiber endfaces or damaged fiber cables. Transceiver undetected: Confirm Enterasys/Extreme compatible optical module and correct insertion. Over-temperature alarm: Check fan operation and cabinet ventilation,clean dust buildup. Stacking unstable: Verify matched firmware version and stacking cable connection.

Product BriefB5K125-24P2 is Extreme Networks Enterasys B5 series 1U rackmount Layer3 gigabit PoE+ managed switch with 24 PoE+ RJ45 ports,2 combo GE SFP,2×10G SFP+ uplink and dual 12G stacking ports,classic spare part for stackable enterprise wiring closet PoE access 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.