PTP sync does not work on each port N9K

[MichF47603]

Hi together,

I've seen any problems with IEEE1588 PTP-Sync on my Nexus N9K-C93108TC-FX (nxos.7.0.3.I7.3).

On some Ports (example: 1/45) won't PTP-Sync work. If i switch the PTP-Client on other Port (example: 1/43) the PTP-sync will work's propertly fine.

The Port-Configuration (1/43 and 1/45) is identical.

What could be the cause for this issue?
- MAC-Table?
- ARP-Table?

Thx,
Michael

[marce1000]

 - You may want to review these bug reports :

                  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvb64728

                  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvi92409

 M.

[MichF47603]

Hi M and thx for your Reply.

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvb64728

This Bug don't describe my issue.

If i deactivate ptp on the port - the cisco port doesn't still send PTP (no Announce, Sync, FollowUp) to Client

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvi92409

This Bug don't describe my issue.

My ClockDomain is 0

My Settings on the N9K:

feature ptp
clock protocol ptp vdc 1
vlan 99
ptp source ###.###.###.###
ptp priority1 2
ptp priority2 2
vlan configuration 99
  no ip igmp snooping

interface Ethernet1/43
  ptp
  ptp vlan 99
  switchport access vlan 99
  mtu 9014

interface Ethernet1/45
  ptp
  ptp vlan 99
  switchport access vlan 99
  mtu 9014

Status:

PTP Device Type: Boundary clock
Clock Identity :  ##:##:##:##:##
Clock Domain: 0
Number of PTP ports: 18
Priority1 : 2
Priority2 : 2
Clock Quality:
        Class : 248
        Accuracy : 254
        Offset (log variance) : 65535
Offset From Master : 15
Mean Path Delay : 0
Steps removed : 1

PTP Port Dataset: Eth1/45
Port identity: clock identity:  ##:##:##:##:##
Port identity: port number: 176
PTP version: 2
Port state: Master
VLAN info:  8
Delay request interval(log mean): 0
Announce receipt time out: 3
Peer mean path delay: 0
Announce interval(log mean): 1
Sync interval(log mean): -2
Delay Mechanism: End to End

I checked the Ouptut of Port 45 - there are only sends Announce & Sync, the FollowUp is still missed.

BR,

Michael

[marce1000]

          - Check logs on the N9K. too, watch for info's concerning this issue, if any.

 M.

[MichF47603]

Could you explain which logs exactly do you mean?

I try to create al logfile in the N9K, but there are no relevant Infos in the logfile in \root\log\ (only 3 lines?)

logging logfile ptp.log 7

01 2021 Jun 30 11:34:11 Switch %VSHD-5-VSHD_SYSLOG_CONFIG_I: Configured from vty by admin on console0
02 2021 Jun 30 11:41:25 Switch %PTP-2-PTP_STATE_CHANGE: Interface Eth1/45 change from PTP_BMC_STATE_LISTENING to PTP_BMC_STATE_PRE_MASTER
03 2021 Jun 30 11:41:29 Switch %PTP-2-PTP_STATE_CHANGE: Interface Eth1/45 change from PTP_BMC_STATE_PRE_MASTER to PTP_BMC_STATE_MASTER

BR,

Michael

[marce1000]

 - Possibly and if applicable or possible ,depending on urgency have a go with the latest advisory release :

                 https://software.cisco.com/download/home/286314802/type/282088129/release/9.3(7)

 M.

[MichF47603]

Hi M,

sorry, but updating the Firmware ist not an option.

It is only allowed, depends on releases the IT-Department, to use nxos.7.0.3.I7.3

How could i identify the cause of the issue?

Thx and BR,

Michael

[marce1000]

 - That's  a pity , but I acknowledge it , but note that such issues can be attributed to subtle bugs albeit being documented or not , usually it remains advisory to try a cisco-advisory release , which I mentioned. It all depends on problem-urgency too.

 M.

[MichF47603]

what i have seen:

- FollowUp is available on Ports 1/1 - 1/44

- FollowUp is not available on Ports 1/45 - 1/48

BR

[marce1000]

 - You may find this document informational and or some commands might be applicable to your platform too :

                 https://www.cisco.com/c/en/us/support/docs/ip/network-time-protocol-ntp/212139-Configure-and-troubleshoot-PTP-in-Nexus.html

 M.

[MichF47603]

sorry, but there are no solutions to fix the issue