On Wed, Jan 21, 2015 at 09:06:39AM +0000, Ledda William EXT wrote: > Hello, > Sometimes I see a "tx poll timeout" sending a delay requests. After about 20 > seconds and then the synchronization restarts. What could be the root cause? > It could be a problem of the driver or a problem of the network? What else?
This can be caused by: 1. link down 2. driver/stack latency delivering the time stamp 3. driver/hw dropping the time stamp Cases 1 and 3 will always trigger the fault. If this happens too often, you can reduce the fault duration with the configuration option called "fault_reset_interval". Case 2 can be mitigated by increasing the "tx_timestamp_timeout" option. The default is 1 millisecond, and so you could try 2 milliseconds. HTH Richard ------------------------------------------------------------------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
