Agilent/Keysight J4904A

The Agilent/Keysight J4904A (HP ProCurve Switch 2848) is a 48-port Gigabit Ethernet switch delivering 96 Gb/s switching fabric capacity and 69.8 million packets per second forwarding performance. This non-blocking architecture switch combines 44 auto-sensing 10/100/1000Base-T ports with 4 dual-personality Gigabit ports, each supporting either RJ-45 or mini-GBIC fiber connectivity. Engineered for enterprise networks requiring high-density Layer 2/3 switching with advanced traffic management, security, and redundancy.

Technical Specifications

• Port Configuration: 44 × 10/100/1000Base-T auto-sensing ports; 4 × dual-personality Gigabit ports (RJ-45 or mini-GBIC)


• Switching Fabric: 96 Gb/s backplane capacity; 69.8 million pps forwarding rate; non-blocking architecture


• Latency: <11.8 µs at 100 Mbps; <4.4 µs at 1000 Mbps (FIFO 64-byte packets)


• Jumbo Frame Support: Up to 9,216 bytes


• VLAN Capacity: 4,096 VLAN IDs; 256 simultaneous VLANs; IEEE 802.1Q tagging; GVRP; 802.1v support

Key Features Layer 3 & Routing

• IP static routing with multicast snooping (IGMPv3 data-driven) Resiliency


• IEEE 802.3ad LACP and ProCurve trunking (up to 24 trunks, 8 links each)


• IEEE 802.1D/802.1w Spanning Tree and 802.1s Multiple Spanning Tree Protocol


• Optional external redundant power supply (J8168A) Traffic Management


• RMON, XRMON, sFlow, SMON support; per-port broadcast throttling; ingress/egress port monitoring Security


• Port security and MAC address lockout; IEEE 802.1X, Web, and MAC-based authentication


• Dynamic ARP protection; Dynamic IP lockdown with DHCP protection


• SSH, SSL, SFTP encrypted management

Typical Applications Medium to large enterprise networks; high-density access layer deployments; environments requiring VLAN segmentation, multicast filtering, and defense against ARP spoofing and IP source address attacks.

Compatibility & Integration Supports standard Ethernet 10/100/1000 and mini-GBIC fiber modules. Management via SSH, SSL, and SFTP protocols.