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DCS Ethernet Switch

L0. L1. L2. HLT. DCS Ethernet Switch. Volker Lindenstruth Kirchhoff Institute for Physics Chair of Computer Science University Heidelberg, Germany Phone: +49 6221 54 9800 Fax: +49 6221 54 9809 Email: ti@kip.uni-heidelberg.de WWW: www.ti.uni-hd.de. KTI Switch. Ethernet Switch Tests.

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DCS Ethernet Switch

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  1. L0 L1 L2 HLT DCS Ethernet Switch Volker Lindenstruth Kirchhoff Institute for PhysicsChair of Computer Science University Heidelberg, Germany Phone: +49 6221 54 9800 Fax: +49 6221 54 9809 Email: ti@kip.uni-heidelberg.de WWW: www.ti.uni-hd.de

  2. KTI Switch

  3. Ethernet Switch Tests Tested Switches: KTI KS-2260 3com 4526 HP Procurve 2524 HP Procurve 2626 Alcatel Omniswitch 6624 Netgear fsm7328s All switches are SNMP managable All switches have solid metal case All switches show a maximum GND noise below 300 mV PP

  4. Ethernet Switch Summary

  5. Done by Marc Stockmeier Magnetic Field Tests Conditions: Current : 20A Field : appr. 300 G Results : Netgear fsm7328s worked in all orientations. It has no fans. HP procurve 2524 worked in all orientations. HP procurve 2626 was destroyed when power was switched on. Alcatel omniswitch 2624 works in two orientations.

  6. Done by Fabio Formenti IEC 61000-4-4 EMI Tests • The burst test according IEC 61000-4-4 simulates a nearby power cable that is attached to an opening circuit breaker or fuse. • The behavior of all switches seem substantially similar. i.e. not large spread of performance. This is due to the fact that the weaker device in the Ethernet chain seems to be the (common) DCS card that looses the link first. However, it looks that with our setup a slightly better performance is obtained with the NETGEAR, followed by the two HPs (about the same) and finally by the Alcatel. • When terminating the Ethernet cable without DCS no great difference detected between the Netgear, HP2524 and HP2626. Some difference for Alcatel (main peak moved ahead from ~4MHz to ~11MHz and higher peak at ~80MHz)

  7. Ethernet Switch Tests Cable Length Tests: Unless the KTI switch all switches behaved well on a 85m long cable. The KS-2260 did only work up to 50m! Conclusion: We decided to recommend the Netgear fsm7328sswitch because of its magnetic field robustness (no fan). It behaves well on long cables with the DCS boards. Signal quality is not the best but connection behaves well.

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