Xtramus LB-300 V1.0 - Manual (Page 10)

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2. Application Mode of LB-300
When working with NuDOG-301 and DApps-2544 utility software, LB-300 can work under two modes:
Symmetric/Asymmetric (End to End) Mode
Under this mode, DUT is connected between NuDOG-301 and LB-300. Test packets are sent between
NuDOG-301 and LB-300 in a one-way direction, while the DUT serves as the middle point.
While working with NuDOG-301 under the End to End Mode, LB-300 works as a packet generator for
bi-directional symmetric/ asymmetric (end-to-end) network tests which allows:
•
Performing symmetric/asymmetric network throughput tests with two packet generator: NuDOG-301
and LB-300
• Performing Round-Trip Latency Test that tests the average latency from packet generator
(NuDOG-301) to the LB-300
Loopback (Round-trip) Mode
Under Loopback Mode, DUT is connected between NuDOG-301 and LB-300. Test packets are sent
between NuDOG-301 and LB-300 in a loop-back manner, while the DUT serves as the middle point.
LB-300 works as a loopback client that returns incoming test streams for loopback (round-trip) test, and
supports 2 loopback modes:
• Layer 1 Loopback: LB-300 will filter out broadcast, multicast and null DA packets and resend the
rest of incoming packets directly
• Layer 2 Loopback: LB-300 will resend packets with switched DA/SA (destination/source MAC
address) and recalculated CRC for different applications
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