nexus 5020 and PTP

[christophrisch]

Hi,
i try to use a nexus 5020 for voip applications. in my case with dante devices.
After approximately 3 minutes it seems to be the nexus switch is filtering all PTP packets and the VOIP/Dante devices are loosing sync.

system: version 5.2(1)N1(9a)

best regards
Christoph

[Rick1776]

No worries, the PTP is just a newer version of NTP because your switch doesn’t support PTP you’ll only be able to sync time with another protocol NTP. The Nexus 5020 will just drop the packets because it won’t know what to do with them.

[christophrisch]

I will try to configure ntp and i will report here.

[christophrisch · Accepted solution]

Update:
I observed the first 3 minutes and afterwards.
I discovered igmp snooping as reason, because there was no igmp querier.
PTP packets filtered by igmp after 3 minutes -> audio devices out of sync.
disabeling igmp snooping -> audio devices are in sync
enabeling igmp snooping and add a igmp querier -> audio devices are in sync

thank yo for your support

[Rick1776]

Glad it’s working. Have a great day.