Re: [Linuxptp-users] Using gPTP profile on multiple devices

[André S. <and...@gm...>]

OK you were right about ports not being isolated. On Wireshark when a
request was sent, it got broadcasted and then received responses from all
devices.

I suspected the NUC  which has an I219V was causing problems so I replaced
it with a third PC using an I210 and then everything worked fine and
according to Wireshark the devices are isolated.

Just to be sure I also replaced the switch with an Extreme x440-48t. The
Extreme has gPTP enabled and works fine with the I210's but the NUC still
causes problems.

>From the Extreme you can see gPTP is enabled. port 25 and 27 is connected
to the I210's and port 29 is connected to the NUC.

X440-48t.4 # show network-clock gptp
gPTP status         : Enabled
gPTP enabled ports  :  1d      2d      3d      4d      5d
                       6d      7d      8d      9d      10d
                       11d     12d     13d     14d     15d
                       16d     17d     18d     19d     20d
                       21d     22d     23d     24d    *25m
                       26d    *27m     28d    *29d     30d
                       31d     32d     33d     34d     35d
                       36d     37d     38d     39d     40d
                       41d     42d     43d     44d     45d
                       46d     47d     48d

Flags:  (*) Active,  (!) Administratively disabled, (d) Disabled gPTP port
role, (m) Master gPTP port role, (p) Passive gPTP port role, (s) Slave gPTP
port role

Al the devices are using clean installs of Ubuntu, exact same profiles and
build of PTP4L so I am not sure whats up with the NUC.


On Tue, Jul 31, 2018 at 5:19 PM, Richard Cochran <ric...@gm...>
wrote:

> On Tue, Jul 31, 2018 at 08:53:07AM +0200, André Sadie wrote:
> > Do you mind elaborating a little more on that? The switch I am using is a
> > time-aware AVB switch that should be able to perform P2P as far as I
> know.
>
> Ok, then, that is what I meant.  According to gPTP, such a switch is
> called a "time aware bridge".  It is clear from the logs that your
> switch is not isolating the ports as it should.  See Delio's response.
>
> Thanks,
> Richard
>
>