CISCO 

CISCO UCS-IOM-2304V2 UCS 2304V2 I/O Module (4 External 8 Int

Mfg Part Number:  UCS-IOM-2304V2  
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Last Updated: May 02, 2025
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Cisco UCS 2304 Fabric Extender

The Cisco UCS 2304 Fabric Extender has four 40 Gigabit Ethernet, FCoE-capable, Quad Small Form-Factor Pluggable (QSFP+) ports that connect the blade chassis to the fabric interconnect. Each Cisco UCS 2304 can provide one 40 Gigabit Ethernet ports connected through the midplane to each half-width slot in the chassis, giving it a total eight 40G interfaces to the compute. Typically configured in pairs for redundancy, two fabric extenders provide up to 320 Gbps of I/O to the chassis.

Main Specification
General Information
Manufacturer Cisco Systems, Inc
Manufacturer Part Number UCS-IOM-2304V2
Manufacturer Website Address http://www.cisco.com
Brand Name Cisco
Product Model 2304 V2
Product Name IOM 2304V2XP I/O Module (4 External, 8 Internal 40Gb Ports)
Product Type Fabric Extender
Physical Characteristics
Height 7.6"
Width 1.4"
Depth 7.2"
Weight (Approximate) 2.80 lb
Miscellaneous
Additional Information

Performance

  • Hardware forwarding at 960 Gbps
  • Low-latency cut-through design, providing predictable, consistent traffic latency regardless of packet size, traffic pattern, or enabled features

Layer 2

  • Layer 2 VLAN trunks
  • IEEE 802.1Q VLAN encapsulation
  • Support for up to 1024 VLANs and Virtual SANs (VSANs)
  • Support for Data Center VM-FEX architecture
  • Jumbo frames on all ports (up to 9216 bytes)
  • Pause frames (IEEE 802.3x)

QoS

  • Layer 2 IEEE 802.1p (Class of Service [CoS])
  • CoS-based egress queuing
  • Egress strict-priority queuing
  • Egress port-based scheduling: Weighted Round-Robin (WRR)
  • Eight hardware queues per port

High availability

  • Up to two fabric extenders can work in the Cisco UCS 5100 Series Blade Server Chassis
  • Active-active data-plane operation with failover
  • Capability to fail over from one fabric extender to another in the event of a failure
  • Active-passive management-plane operation
  • Support for nonstop management-plane functions; if the active fabric extender fails, the passive fabric extender takes over the chassis management functions

Management

  • Management of fabric extenders integrated into Cisco UCS Manager
  • Capability to manage blade server chassis components such as power supplies, fans, and blades in conjunction with the fabric interconnect
  • Firmware levels between the fabric extender and fabric interconnect always synchronized

Low-Latency, Lossless 40 Gigabit Ethernet Unified Network Fabric

  • PFC (per-priority pause frame support)
  • Data Center Bridging Exchange (DCBX) Protocol
  • IEEE 802.1Qaz: Bandwidth management

Industry standards

  • IEEE 802.1p: CoS prioritization
  • IEEE 802.1Q: VLAN tagging
  • IEEE 802.3: Ethernet
  • IEEE 802.3ad: Link Aggregation Control Protocol (LACP)
  • IEEE 802.3ba: 40 Gigabit Ethernet
  • QSFP+ support
Country of Origin China
Environmentally Friendly Yes
product information
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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