Model Name


Part Number


Hardware Load Module Specifications

Slot / Number of Ports

1-slot / 4x100GbE native CFP4 ports

Physical Interfaces

Native CFP4 (with 4x25Gb/s electrical interface)

CPU and Memory

Multicore processors with 4GB of memory per processor

IEEE Interface Protocols

  • IEEE 802.3 100GBASE-R
  • IEEE 802.3bj
  • IEEE P802.3bm

Transceiver Support

  • 100GBASE-LR4 CFP4 for single mode fiber
    • Pluggable transceiver
  • 100GBASE-SR4 CFP4 for multimode fiber
    • Pluggable transceiver

Advanced Layer 1 Support

  • 100GE:
    • Auto-negotiation (AN, Clause 73 copper cable assembly)
    • Ethernet Forward Error Correction (FEC , Clause 91)
    • FEC statistics: RS-FEC Corrected and Uncorrected Codeword Counts
    • Ability to independently turn ON or OFF AN and FEC, or to allow IEEE defaults to manage the interoperability

Operating Temperature Range

  • 41°F to 95°F (5°C to 35°C), ambient air
  • 0% to 85%, non-condensing

Load Module Dimensions

  • 16.1” (L) x 1.3” (W) x 12.0” (H)
  • 409mm (L) x 33mm (W) x 305mm (H)

Load Module Weights

  • Module only: 13.15 lbs. (5.96 kg)
  • Shipping: 16.95 lbs. (7.69 kg)

Chassis Capacity: Maximum Number of Cards and Ports per Chassis Model

XGS12-SD Chassis[i] (940-0011)

10 load modules: 40-ports of 100GbE

XGS12-HS Chassis[i] (940-0006)

10 load modules: 40-ports of 100GbE

XGS12-HSL Chassis[i] (940-0016)

10 load modules: 40-ports of 100GbE

XGS2-SD Chassis (940-0010)

2 load modules: 8-ports of 100GbE

XGS2-HS Chassis (940-0012)

2 load modules: 8-ports of 100GbE

XGS2-HSL Chassis (940-0014)

2 load moduleS: 8-ports of 100GbE

Transmit Feature Specifications

Transmit Engine

Wire-speed packet generation with timestamps, sequence numbers, data integrity signature, and packet group signatures

Max. Streams per Port

100GbE: 128

Max. Streams per Port in Data Center Ethernet

100GbE: 128

Stream Controls

Rate and frame size change on the fly, sequential and advanced stream scheduler

Minimum Frame Size


  • 60 bytes and greater at full line rate
  • 49 bytes at less than full line rate

Maximum Frame Size

14,000 bytes

Maximum Fame Size in Data Center Ethernet

9,216 bytes

Priority Flow Control

  • 8 line-rate-capable queues with each supporting up to 2,500 byte frame lengths
  • 1 queue supporting up to 9,216 byte frame lengths

Frame Length Controls

Fixed, increment by user-defined step, weighted pairs, uniform, repeatable random, IMIX, and Quad Gaussian

User Defined Fields (UDF):

Fixed, increment or decrement by user-defined step, sequence, value list, and random configurations. Up to ten 32-bit wide UDFs are available.

  • Value Lists (Max.)

4 million / UDF

  • Sequence (Max.)

256K / UDF

Error Generation

Generate good CRC or force bad CRC, undersize and oversize standard Ethernet frame lengths, and bad checksum

Hardware Checksum Generation

Checksum generation and verification for IPv4, IP over IP, IGMP/GRE/TCP/UDP, L2TP, GTP

Link Fault Signaling

Reports, no fault, remote fault, and local fault port statistics. Generate local and remote faults with controls for the number of faults and order of faults, plus the ability to select the option to have the transmit port ignore link faults from a remote link partner.

Latency Measurement Resolution

100GbE: 2.5 nanoseconds

Intrinsic Latency Compensation

Removes inherent latency error from the 100GbE port electronics

Transmit Line Clock Adjustment

Ability to adjust the parts per million line frequency over a range of -100 ppm to +100 ppm per port or resource group

Receive Feature Specifications

Receive Engine

Wire-speed packet filtering, capturing, real-time latency and inter-arrival time for each packet group, with data integrity, sequence and advanced sequence checking capability

Trackable Receive Flows per Port

100GbE: 512K

Minimum Frame Size


  • 60 bytes and greater at full line rate
  • 49 bytes at less than full line rate

Filters (User-Defined Statistics, UDS)

2 SA/DA pattern matchers, 2x16-byte user-definable patterns with offsets capability for start of: frame, IP, or protocol. Up to 6 UDS counters are available.

Hardware Capture Buffer per Port or Resource Group

100GbE: 2GB per port

Statistics and Rates

Link state, line speed, frames sent, valid frames received, bytes sent/received, fragments, undersize, oversize, CRC errors, VLAN tagged frames, 6 user-defined stats, capture trigger (UDS 3), capture filter (UDS 4), 8 QoS counters, data integrity frames, data integrity errors, sequence and advanced sequence checking frames, sequence checking errors, ARP, and PING requests and replies, FEC statistics: RS-FEC Corrected and Uncorrected Codeword Counts

PCS Lanes Port Statistics

PCS Sync Errors, Illegal Codes, Remote Faults, Local Faults, Illegal Ordered Set, Illegal Idle, Illegal SOF, Out Of Order SOF, Out Of Order EOF, Out Of Order Data, Out Of Order Ordered Set

Latency / Jitter Measurements

Cut-through, store & forward, forwarding delay, up to 16 time bins latency/jitter, MEF jitter, and inter-arrival time

Layer 2-7 Protocol Support


L2/3 Routing, Bridging, and Timing

  • Carrier Ethernet: Link OAM, CFM/Y.1731, PBB/PBB_TE, E-LMI, 1588v2 (PTP), ESMC, TWAMP


Data Center Ethernet/SDN

  • Priority Class-Based Flow Control (IEEE802.1Qbb), FCoE/FIP, LLDP/DCBX, VNTAG/VNIC, VEPA, FabricPath, TRILL, SPBM, OpenFlow, VXLAN, Segment Routing ISIS


Broadband Access

  • Broadband: DHCPv4/v6, PPPoX / L2TP, ANCP, IPv6 Autoconfiguration, DHCPv4/v6 over EoGRE, IGMP/MLD, IPTV One-time (IGMP / MLD Join / Leave latency), AMT
  • Authentication: 802.1x, WebAuth, EAPoUDP, Cisco NAC


Layer 4-7 Application Traffic Testing Support

  • Data protocol support for HTTP, SSL, FTP/TFTP, email (SMTP, POP3, IMAP), IPv4, IPv6, VLAN, ER


Application Support

Xcellon-Multis CFP4+ENH Load Module

  • IxExplorer: Layer 2-3 wire-speed traffic generation and analysis and Layer 1 BERT and IEEE 802.3ba HSE PCS Lanes testing.
  • IxNetwork: Wire-rate traffic generation with service modeling that builds realistic, dynamically-controllable data-plane traffic. IxNetwork offers the industry's best test solution for functional and performance testing by using comprehensive emulation for routing, switching, MPLS, IP multicast, broadband, authentication, Carrier Ethernet, and data center Ethernet protocols.
  • IxLoad: A scalable solution for testing converged multiplay services, application delivery platforms, and security devices and systems. IxLoad emulates data, voice, and video subscribers and associated protocols to ensure quality of experience (QoE).[ii]
  • Tcl API: Custom user script development for layer 1-7 testing.

[1] The Xcellon-Multis load modules may not be placed into slots 1 and 12 of the XGS12-HS, XGS12-SD, and XG12 chassis. Please consult your factory sales representative for further information.

[2] The IxLoad application supports only the set of protocols listed in the Load Module Specification Table.

Evolution of Xcellon HSE Testing

Evolve Your Higher Speed Ethernet Testing

Bandwidth requirements for enterprises, service providers, and global data centers are growing rapidly, straining 10GE and 40GE technologies. Service providers and data centers are looking at high density 100GE networking infrastructure solutions to meet these demands, and equipment manufacturers are rapidly increasing port densities to remain competitive. With Ixia’s support of native CFP4 interface technology, equipment manufacturers can use Ixia’s high density 100GE load module to assist the move to higher density 100GE with four ports per blade. For service provider data centers, native CFP4 support provides a smaller form factor to increase 100GE port density, the ability to have legacy CFP management controls, and optics with up to 10 kilometers reach range. CFP4 reduces overall rack space and power consumption requirements for 100GE test solutions – all while delivering greater network bandwidth.

Xcellon-Multis is the world’s first native CFP4 100GE test solution to satisfy network equipment maker test needs that range from basic interoperability and functional test, to high-port-count performance tests. As service providers and large enterprises implement this same high-density equipment in their own networks, they need this same test solution to verify performance and functionality prior to deployment.

World’s first Native CFP4 100GE test module: Xcellon-Multis native CFP4 4x100GE, 1-slot load module


  • More ports, bandwidth, flexibility, capability, and horsepower in a single high-density test load module
  • Reduces total cost of ownership with up to 40-ports of 100GE in a single 11RU rackmount chassis
  • Excellent test platform for the new 100GBASE-SR4, Auto-Negotiation, FEC, and 100GBASE-LR4 interoperability, functional, and performance testing
  • A broad feature set common to other Xcellon-Multis 100GE products, such as CXP and QSFP28