Extreme Networks B5K125-24 B5 Series Stackable Gigabit Access Switch

Technical Specifications

Model：B5K125-24 Brand：Extreme Networks Product Type: 1U rack mount Layer2/L3 stackable gigabit access switch (B5 Series,EOL)

Front Ports:

• 24 × 10/100/1000BASE-T auto-sensing RJ45 copper ports

• 2 × Combo SFP ports (shared with copper)

• 2 × 10G uplink ports

• 2 × dedicated stacking ports

• RJ45 serial console port for local CLI configuration

• LED indicators for port link, activity, stack ID, power and fault alarm

Rear Panel Interfaces:

• Built-in AC power supply

• External RPS redundant power connector

• Equipment grounding terminal

Switching & Layer Features: Switch Fabric: Wire-speed non-blocking switching fabric Forwarding Rate: Wire-speed forwarding MAC Address Table: 16K entries Max Jumbo Frame: 9216 bytes VLAN: Up to 4094 802.1Q tagged VLAN Routing: IPv4 static routing, RIP Security: 802.1X port authentication, ACL, broadcast storm control, MAC filtering QoS: Hardware L2-L4 classification, multiple priority queues Stacking: Dedicated stacking ports for B5 series stack group OS: ExtremeXOS operating system

Power & Mechanical: Power Supply: Built-in 100-240V AC power supply, support external RPS Cooling: Integrated fixed fan module Operating temperature：0℃ ~ +50℃ Dimension: 44mm(H) ×440mm(W) ×260mm(D) Weight: Approx 4.3 kg Mounting: Standard 19-inch 1U rack mounting brackets

System compatibility

B5K125-24 belongs to Extreme B5 series switch family. Compatible with B5 series stacking technology, can stack with other B5 models. Works with Extreme 1G SFP transceivers. Designed for enterprise office, classroom and building access layer. This product is end-of-sale, widely used for legacy campus LAN maintenance and spare replacement.

Function

B5K125-24 is 24-port gigabit stackable access switch manufactured by Extreme Networks. 24 gigabit copper ports connect PCs, IP phones and wireless access points. Combo SFP and 10G uplink ports provide flexible fiber high-speed uplink to aggregation layer. Dedicated stacking ports combine multiple B5 switches as one logical device for unified management. External RPS interface improves power reliability for critical network. Widely deployed for legacy enterprise campus access network spare replacement.

Installation

Follow ESD protection procedure. Mount switch into standard 19-inch rack. Insert SFP transceivers and patch cables. Connect AC power cord. Access console port for initial ExtremeXOS configuration, VLAN, ACL and stacking setup. Verify port link and stack status after power-up.

Interface

24×1G RJ45 ports,2×combo SFP ports,2×10G uplink ports,2×dedicated stacking ports,serial console port,RPS connector,status LED indicators for Extreme Networks B5K125-24.

Feature

Original Extreme Networks B5K125-24 B5 series 1U gigabit access switch,24×1G copper,combo SFP +10G uplink,dedicated stacking,ExtremeXOS,external RPS support. This spare unit is used for legacy enterprise campus access layer network maintenance and hardware replacement.

Diagnostic

Switch fails to boot: Check AC power cord and external RPS connection. Copper port no link: Verify network cable quality and RJ45 termination. SFP uplink down: Check SFP module compatibility, fiber cleanliness and fiber continuity. Stack split fault: Confirm stacking cable integrity and matched ExtremeXOS firmware. High temperature alarm: Inspect fan operation and rack ventilation.

Product BriefB5K125-24 is Extreme Networks B5 series 1U stackable gigabit access switch with 24 copper gigabit ports, combo SFP,10G uplink and dedicated stacking ports,classic spare for legacy campus LAN maintenance.

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 replacement.