No IEEE 802.1AS Capable on Summit X440-24t switch

[Jakub_Mielczar1]

Dear Experts,

I have a Summit X440-24t AVB switch with AVB enabled. I am connecting an AVB endpoint to the switch, which is running gPTP. The switch reports that the port is not "IEEE 802.1AS Capable" when I run the "show network-clock gptp" command. The propagation delay is being measured and it is below the threshold (4000ns, threshold is 10000ns). The connected AVB endpoint is sending gPTP announce messages. What are the possible reasons that "IEEE 802.1AS Capable" is set to "No" and "Port Role" is set to "3 (Disabled)"?

Thank you,
Jakub Mielczarek

[Jakub_Mielczare]

I had to suspend work on this topic for a while. I am back at it. It still does not work with media converter and my gptp endpoint.

Here is the output from switch console:
=========================================================
* X440-24t.38 # show network-clock gptp port 15 counters
Port number : 15
gPTP port status : Enabled
------------------------------------------------------------
Parameter Receive Transmit
------------------------------------------------------------
Announce 60 0
Sync 952 0
Follow Up 0 0
Peer Delay Request 60 64
Peer Delay Response 64 60
Peer Delay Response Follow Up 64 60
gPTP packet discards 0 -
------------------------------------------------------------
Announce Receipt Timeout Count : 0
Sync Receipt Timeout Count : 0
Peer Delay Allowed Lost Response Exceeded Count : 0
=========================================================
* X440-24t.38 # show network-clock gptp ports 15
Physical port number : 15
gPTP port status : Enabled
Clock Identity : 00:04:96:ff:fe:97:f3:c8
gPTP Port Number : 15
IEEE 802.1AS Capable : No
Port Role : 3 (Disabled)
Announce Initial Interval : 0 (1.000 secs)
Announce Current Interval : 0 (1.000 secs)
Announce Receipt Timeout : 3
Sync Initial Interval : -3 (0.125 secs)
Sync Current Interval : -3 (0.125 secs)
Sync Receipt Timeout : 3
Sync Receipt Timeout Interval : 0 ns
Measuring Propagation Delay : Yes
Propagation Delay : 4029 ns
Propagation Delay Threshold : 10000 ns
Propagation Delay Asymmetry : 0
Peer Delay Initial Interval : 0 (1.000 secs)
Peer Delay Current Interval : 0 (1.000 secs)
Peer Delay Allowed Lost Responses : 3
Neighbor Rate Ratio : 1.002490
PTP Version : 2

=========================================================

* X440-24t.39 # show network-clock gptp parent-set
Parent Clock Identity : 00:04:96:ff:fe:97:f3:c8
Parent port number : 0
Cumulative Rate Ratio : 0
GM Clock Identity : 00:04:96:ff:fe:97:f3:c8
GM Clock Accuracy : 254 (Unknown)
GM Offset Scaled Log Variance : 17258
GM Priority1 : 246
GM Priority2 : 248

Any help highly appreciated.

Regards,
Jakub

[Jakub_Mielczare]

It works after fixing timestamp conversion in my endpoint. The Neighbor Rate Ratio could be the cause. Now the rate ratio is 0.999989

[John_Lemonovich]

did you ever get it working - I am having a similar issue

Thanks!
John

[Jakub_Mielczar1]

Hi,

Not yet, I was on vacation the last week. Will try to figure it out.

Thanks,
Jakub