... | @@ -38,7 +38,7 @@ This page is a life document to decide on the features of the new WR switch. It |
... | @@ -38,7 +38,7 @@ This page is a life document to decide on the features of the new WR switch. It |
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* **To be investigated:**
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* **To be investigated:**
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* What is typically used in Ethernet switches (standards and common practices, front or back)
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* What is typically used in Ethernet switches (standards and common practices, front or back)
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* If/what standards for redundant/swappable power supplies exist (e.g. check Intel standard CRPS)
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* If/what standards for redundant/swappable power supplies exist for switches/servers/other that we could reuse (e.g. check Intel standard CRPS, examples: [here](https://www.supermicro.com/support/resources/pws.php) and [here](http://www.compuware-us.com/products.php?cno1=3) )
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* **Initial idea:** the basic version of the switch should have single power supply (not redundant, not swappable) and be prepared for redundant/swappable supply, two possibilities to explore
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* **Initial idea:** the basic version of the switch should have single power supply (not redundant, not swappable) and be prepared for redundant/swappable supply, two possibilities to explore
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* Standard socket for redundant/swappable power supply already in place in the basic switch version (e.g. with [Zippy M1U2-5650V4H](http://www.circotech.com/zippy-m1u2-5650v4h-650w-1u-redundant-power-supply-.html) )
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* Standard socket for redundant/swappable power supply already in place in the basic switch version (e.g. with [Zippy M1U2-5650V4H](http://www.circotech.com/zippy-m1u2-5650v4h-650w-1u-redundant-power-supply-.html) )
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* Standard connector (power/diagnostics) to allows WR switch versions with redundant/swappable power supply and empty space in the WR switch enclosure
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* Standard connector (power/diagnostics) to allows WR switch versions with redundant/swappable power supply and empty space in the WR switch enclosure
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... | @@ -49,18 +49,16 @@ This page is a life document to decide on the features of the new WR switch. It |
... | @@ -49,18 +49,16 @@ This page is a life document to decide on the features of the new WR switch. It |
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* **To be investigated:**
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* **To be investigated:**
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* What is typically used in Ethernet switches (standards and common practices)
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* What is typically used in Ethernet switches (standards and common practices)
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* If/what standards for redundant/swappable power supplies exist (e.g. check Intel standard CRPS, examples: [here](https://www.supermicro.com/support/resources/pws.php) and [here](http://www.compuware-us.com/products.php?cno1=3) )
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* If/what standards for redundant/swappable fans exist for switches/servers/other
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* If/what standards for airflow in switches/routers/rack devices exist
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* **Initial idea for FANs:**
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* **Initial idea for FANs:**
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* Make a fan-less switch with FANs, i.e. include means that improved heat dissipation from the [Fan-less WR switch](https://www.ohwr.org/project/wrs-fl-hw/wikis/home) while installing FANs
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* Make a fan-less switch with FANs, i.e. include means that improved heat dissipation from the [Fan-less WR switch](https://www.ohwr.org/project/wrs-fl-hw/wikis/home) while installing FANs
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* Provide swappable fans in the basic version of the WR switch (custom mechanics using standard fans to minimize costs)
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* Provide swappable fans in the basic version of the WR switch (e.g. based on existing solution, custom mechanics using standard fans to minimize costs)
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* **Initial idea for airflow:**
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* **Initial idea for airflow:**
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* Initial idea: blow out air to the back (circulation from front to back) -further study needed
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* Initial idea: by default front-back airflow, allow back-front - further study needed
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* FANs should be of good quality with speed measurement supported by HW, Fan control in PCB
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* FANs should be of good quality with speed measurement supported by HW, Fan control in PCB
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* Air holes in the front panel should be added, not to depend on the SFP cages
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* Air holes in the front panel should be added, not to depend on the SFP cages
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*NOTE1: There is no swappable FANs in basic switch version - it would be too expensive, increase price at 60 euro per module*
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*NOTE1: Fanless version (i.e. no fans) has been discarded, it is not sufficient for DWDM. Yet, ideas from the fanless version might be used.*
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*NOTE2: Fanless version has been discarded, it is not sufficient for DWDM*
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## FPGA
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## FPGA
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... | @@ -72,8 +70,8 @@ This page is a life document to decide on the features of the new WR switch. It |
... | @@ -72,8 +70,8 @@ This page is a life document to decide on the features of the new WR switch. It |
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* 1 PCB for basic functionality - **TBI: the current sandwich approach seems OK**
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* 1 PCB for basic functionality - **TBI: the current sandwich approach seems OK**
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* Connectors
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* Connectors
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** JTAG
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* JTAG
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** Connector for expansion - **TBI: what type, etc**
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* Connector for expansion - **TBI: what type, etc**
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## Clocking
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## Clocking
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