<br>We didn't change any of the time stamping mechanism but found that we could get improvement by taking a closer look at the filtering applied to the Master to Slave Delay etc. Especially with store and forward switches, it is not obvious to me that the kernel time stamping is the dominating factor in the time synchronization.<br>
<br>I posted something on this at the old (sourceforge) mailing list... lets see... here it is: <a href="http://sourceforge.net/projects/ptpd/forums/forum/469207/topic/1937491">http://sourceforge.net/projects/ptpd/forums/forum/469207/topic/1937491</a><br>
<br>We generally get < 50 uS using ARM embedded boards and a i386 master, 2-4 switches in the loop and > 30Mb/s traffic. For us the trick was VLAN prioritization and additional filtering on the master to slave delay, by rejecting values that were clearly buffered too long by the switches.<br>
<br>Cheers<br><br>Gertjan<br><br><br clear="all"><br>-- <br>==================================================<br>Gertjan Hofman<br>ghofman [at] <a href="http://gmail.com">gmail.com</a> gertjan.hofman [at] <a href="http://honeywell.com">honeywell.com</a><br>
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