(r13) IPaddressAssignment < BUCMSPublic

Tags: view all tags
---+ AMC13 IP and MAC Address Assignment

The AMC13 has two PCB Tongues.  Tongue 1 (T1) and Tongue 2 (T2) each has their own FPGA (Virtex6/Kintex7 for T1, Spartan6 for T2) and therefore each has their own IP address.  Typically T2 has an IP address one higher in the last octet than T1.

---++ How the IP Address is assigned
---+++ 1. Via the Serial Number
This scheme acts as the "backup" plan, using the jumper connections on T2 to assign IP addresses to both tongues
The address is 192.168.1.x
   * Final Byte for Spartan Chip = 254 - 2*SN
   * Final Byte for Virtex/Kintex Chip = 255 - 2*SN
---+++ 2. Via MMC SPI EEPROM
In this scheme, the MMC sends a configuration packet which contains the IP address to be assigned from non-volitile EEPROM to the Spartan and Virtex chips at powerup.  For information on how to load new configuration information into the SPI, see [[AMC13MmcSoftware][the MMC software page]]
---+++ 3.  RARP from a software daemon.    

RARP is enabled with an IP address beginning with 00 in the first octet is set using method 2 above.

Note that we are working out a new scheme as we go into mass production in early 2014.
We expect that the default addresses will be in the range 192.168.x.y where x is 1-4 and y is 128-254.
HCAL will use a crate-based scheme where x is the crate and y is 4*slot.

---++ AMC13 MAC address assignment

For all boards produced through 2013 (Serial numbers below 64) the MAC address is as follows:
  =08-00-30-F3-00-xx=
With xx:
<pre>
  bits 0-5  complement of serial number 0-63
  bit 6   =0 for T2 board (lower IP)
          =1 for T1 board (upper IP)
  bit 7   =0
</pre>

Example:

If we have a board with serial number 37, we can calculate the last digit of the MAC address:

<pre>
xx = hex(63 - (SN))  
</pre>

63-37 = 26, which is =0x1a= in hex

SN37 MAC addresses:

  =08-00-30-F3-00-1a= (for T2, low IP)and

  =08-00-30-F3-00-5a= (for T1, higher IP)

For modules with serial numbers above 63 the upper two bits are complemented
and assigned to MAC address bits 7, 8.

-- Main.EricHazen - 12 Mar 2014
Topic revision: r13 - 28 Apr 2014 - EricHazen