Hardware Platforms
The GEM Network Simulator is available on the Maui and Hawaii platforms. Both Maui and Hawaii consist of 2U rack-mount chassis that support up to 7 software loads.
- The Maui platform supports up to four blades and data rates up to 2.6Gbps.
- The Hawaii platform supports up to two blades and data rates up to 11.3Gbps.
Supported rates
- 10Mbps copper
- 100Mbps copper
- 1Gbps copper and fiber
Profiles
- Define up to 64 distinct network profiles emulating 64 network clouds.
- Create up to 512 rules to identify profiles.
- Define throughput, delay and impairment profiles for each profile.
Selection Criteria
- Data-based rules can be defined using a variable-length mask (1 to 32 bytes long) to match data anywhere within an Ethernet frame. For example a rule could match MAC address, IP address, VLAN tag, a fixed byte offset or all of the above simultaneously.
- Deterministic rules can be defined to select packets at regular intervals (every Nth packet) or at randomly distributed intervals (Poisson, Gaussian, Uniform).
Delay/Jitter
- Define a delay value for each network profile.
- Insert from 50us to 250ms of packet delay in 16ns increments (GigE) with the standard configuration at full line rate.
- Shift code-word alignment from 0 and 19 bits in 1-bit increments (0.8ns at 1.25Gbps).
- Introduce inter-packet delay variation (jitter) accurately.
- Increase maximum delay with a Delay Doubler and Quadrupler (even greater delay amounts are available upon request).
Error
- Set error rates from 10-12 to 10-2 at Layer 1 or MAC layer.
- Inject errors at a fixed rate (periodic) or randomly with a Uniform, Poisson or Gaussian distribution.
- Error 1 bit, 32 contiguous bits or a 32-bit user-defined error pattern.
- Target specific bytes for error or modification.
Impairments
- Configure impairment settings per profile.
- Drop
- Reorder
- Duplicate
- Fragment
- Corrupt CRC
- Corrupt data
- Inject Loss of Signal.
- Optionally fix the Ethernet CRC or IP checksum.
- Combine multiple impairments on a single packet.
- Modify impairment configuration without interrupting traffic flow.
Bandwidth Control
- Limit throughput to a minimum of 0.005% of line rate (50kbps at 1GigE).
- Optionally generate Pause Frames. High-water and low-water (generation of XOFF & XON) thresholds are specified by the user in terms of surplus/deficit of bytes.
Operation
- Configure via a front panel LCD control for standalone operation
- Configure remotely via an Ethernet control port
- Interactive: Browser-based GUI with save/load capability
- Automated: Powerful TCL script library
GEM Software
Loads
| SW Load
|
Description |
HW Platform
|
Std
Delay (per direction) |
| GEM |
Gigabit Ethernet Advanced Network Emulator. Optical GbE interface. |
Maui,
Hawaii |
250ms |
| GEM-C |
Gigabit Ethernet Advanced Network Emulator. Copper GbE interface. |
Maui,
Hawaii |
250ms |
| GEM-F |
10/100 Mbps Ethernet Advanced
Network Emulator. Copper interface. |
Maui,
Hawaii |
250ms |
GE Network Simulators
GE Gigabit Ethernet Network Simulators provide basic cost-effective fiber-spool replacement. Operating at Layer 1, GE Network Simulators simulate signal delays that occur during the transmission of Gigabit Ethernet data over optical fiber, allow controlled packet loss/error injection and simulate loss of signal (LOS) conditions.
|
| SW Load |
Description |
HW Platform |
Std Delay (per direction) |
| GE |
Gigabit Ethernet Signal Delay Network Emulator. Optical interface. |
Maui, Hawaii |
250ms
|
Note: Up to 7 software loads for different protocols (SONET, OTN, Ethernet, Fibre Channel, CPRI) can be combined on the same system. A combo network simulator can easily switch between different features, data rates and protocols, simplifying testing and leveraging your investment. [view Network Emulator Combo products ]
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