Network Emulation

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Network Emulation

• Nistnet and its application to the ADEC
  satellite project

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Used to test H.323

• Verified Nistnet system prior to test.
• Tested platform with SmartBits.
• All parameters were met with in a /- 1 msec
• (Actual resolution .5msec)
• With SmartBits we could verify switches etc. to
  further validate our findings. Worst case is
  total accuracy within /- 3msec.

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Our System Specs

• Operating System Linux Mandrake 7.2 Kernel
  recompiled and optimized for the device to be a
  router.
• CPU Pentium III 733Mhz
• Memory 256 MB
• Motherboard Asus CUSLC2-C AGP4X
• NICS Intel Etherpro 10/100
• Emulator Software Nistnet 2.1.0

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Findings

• Latency does not matter
• Drop is important but can tolerate up to 1.
• H.323 is very jitter intolerant.

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