Difference between revisions of "Hall Network Specifications"

Revision as of 11:55, 14 October 2013

Below we propose a design for fiber connections between the Rack Room and the Hall, and network switch and terminal server placement.

Elliott Wolin, Mark Dalton

11-Oct-2013

Notes

Based on 10**8 photons/sec, 200 kHz trigger rate, existing L1 rejection algorithm, block=1 mode, no compression.
Ethernet port counts from Fernando's rack layouts and information from Dave Butler concerning other controls requirements.
We own about 15 24-port managed switches with 10 GBit/s fiber uplinks, some being used in EEL building and other places.
8-port managed switches with 1 GBit/s fiber uplinks exist.
Only managed switches (no hubs!) allowed in hall.
Fibers come in bundles of 12 or 24, 2 fibers needed for one uplink.
Standard JLab practice is to terminate all fibers in patch panel when bundles installed.
Bundle/patch panel installation is expensive, can run much cheaper patch fibers from switch in one rack area to patch panel in nearby rack area.
DAQ crates require two Ethernet connections each, one for the ROC and one for the fan tray.
ROC's each need an RS232 connection to a terminal server, terminal servers require an Ethernet connection.
Each terminal server has xxx ports.

Hall Fiber Specifications
Rack	ROC Connections	Controls Connections	Max Bandwidth	Total Bandwidth	Fiber Bundle	Comment
T1	1	5	<80 MB/s	151 MB/s	12 strand	this is a comment
Bread	Pie

@@ Line 20: / Line 20: @@
-{| class="wikitable"
+{| class="wikitable" style="text-align: center;"
 |+Hall Fiber Specifications
-! align="center"| Rack !! ROC Connections !! Controls Connections !! Max Bandwidth !! Total Bandwidth
+! align="center"| Rack !! ROC Connections !! Controls Connections !! Max Bandwidth !! Total Bandwidth !! Fiber Bundle !! Comment
 |-
-|T1
+|T1 || 1 || 5 || <80 MB/s || 151 MB/s || 12 strand || this is a comment
-|1
-|5
-|<80 MB/s
-|151 MB/s
 |-
-|Bread
+|Bread ||Pie || || ||
-|Pie
-|-
-|Butter
-|Ice cream
 |}