Difference: IPaddressAssignment (25 vs. 26)

Revision 2604 Nov 2020 - ChristopherCosby

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META TOPICPARENT	name="HcalDTC"

AMC13 IP and MAC Address Assignment

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How the AMC13 IP Address is assigned

1. Via the Serial Number

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This scheme acts as the "backup" plan, using the jumper connections on T2 to assign IP addresses to both tongues The address is 192.168.z.x

Final Byte for Spartan Chip (T2) = 254 - 2*SN[6:0]
Final Byte for Virtex/Kintex Chip (T1) = 255 - 2*SN[6:0].

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< z is 1 for SN 0-127 and 2 for SN 128-255 and 3 for SN 256-383.

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> z is 1 for SN 0-127 and 2 for SN 128-255 and 3 for SN 256-383.

N.B.Serial numbers 0, 128, 256 are not used as it would result in IP address ending in 255, which can cause troubles on some networks.

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See https://twiki.cern.ch/twiki/bin/viewauth/CMS/CMSCommonMacAddresses

Firmware review reveals-

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  nSN <= not SerialNumber;
  mac => x"080030f30" & "000"                  & not nSN(7 downto 6) & '0' & nSN(5 downto 0)   #old T2
  mac => x"080030f30" & '0' & not nSN(8) & '0' & not nSN(7 downto 6) & '0' & nSN(5 downto 0),  #new T2
  mac <= x"080030f30" & '0' & not nSN(8) & '0' & not nSN(7 downto 6) & '1' & nSN(5 downto 0);  #all T1

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  nSN <= not SerialNumber;
  mac => x"080030f30" & "000"                  & not nSN(7 downto 6) & '0' & nSN(5 downto 0)   #old T2
  mac => x"080030f30" & '0' & not nSN(8) & '0' & not nSN(7 downto 6) & '0' & nSN(5 downto 0),  #new T2
  mac <= x"080030f30" & '0' & not nSN(8) & '0' & not nSN(7 downto 6) & '1' & nSN(5 downto 0);  #all T1

So all MAC addr start with 08-00-30-F3.

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9	'0'
10	S/N( 8)
11	'0'

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This results in a range of 00-00 to 01-FF for AMC13 serial# 0-255 and 04-00 to 05-FF for AMC13 serial# 256-511.

-- EricHazen - 21 Mar 2016

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IP and MAC Address Calculator

Download and run this python script ($ python addressCalc.py -s serial_no), to get a quick printout of the IP and MAC address for a given SN

-- Christopher Cosby - 04 Nov 2020

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