DNAC Telemetry

[Joris Deprouw]

Hi Guys,

I have 50 switches discovered in my DNAC DN-3 appliance.

On 45 of them I have successfully enabled telemetry, but on 5 of them I'm not able to get this working.

When I try to enable telemetry on the 5 non-working switches, I get the error "No Telemetry-applicable interfaces found!"

All devices are Catalyst 9300 switches. The configuration of them has been based on the same template. I don't see any major differences between the switches.

Any ideas to solve this issue?

Thanks,

Joris

[balaji.bandi]

any difference IOS XE code ? 

check the config :

show run | sec tel

also follow below guide to look more information on the switch :

https://blogs.cisco.com/developer/getting-started-with-model-driven-telemetry 

[Joris Deprouw]

Hello,

The code is the same on all switches, 17.09.04a.

When I compare the telemetry section of a working switch and a non-working switch, the only difference is the source ip address.

All other configuration is identical. I do have multiple "telemetry ietf subscriptions" on every switch (also on those which are working). I don't know if that is normal...

Switch#show telemetry ietf subscription all
ID Type State State Description
500 Configured Valid Subscription validated
501 Configured Valid Subscription validated
502 Configured Valid Subscription validated
503 Configured Valid Subscription validated
504 Configured Valid Subscription validated
550 Configured Valid Subscription validated
551 Configured Valid Subscription validated
552 Configured Valid Subscription validated
553 Configured Valid Subscription validated
554 Configured Valid Subscription validated
555 Configured Valid Subscription validated
600 Configured Valid Subscription validated
601 Configured Valid Subscription validated
602 Configured Valid Subscription validated
603 Configured Valid Subscription validated
604 Configured Valid Subscription validated
605 Configured Valid Subscription validated
606 Configured Valid Subscription validated
607 Configured Valid Subscription validated
608 Configured Valid Subscription validated
ID Type State State Description
750 Configured Valid Subscription validated
751 Configured Valid Subscription validated
1020 Configured Valid Subscription validated
8882 Configured Valid Subscription validated

Kr,

Joris

[Torbjørn · Accepted solution]

What does your switchport configurations look like on these switches? The Catalyst Center doesn't seem to discover the interfaces as it should. The requirements for an interface to be considered telemetry applicable is outlined in the documentation linked below. Can you try to add "lan" to the interface description and resync the device to see if it would make a difference?

https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/network-automation-and-management/catalyst-center/2-3-7/user_guide/b_cisco_catalyst_center_user_guide_237/b_cisco_dna_center_ug_2_3_7_chapter_01010.html#Cisco_Concept.dita_dbacaa6d-9aba-4...

[Joris Deprouw]

Hi...

The impacted switch did indeed not have a single port configured with the "lan" description...I have adapted the configuration. I did a resync and updated the telemetry settings and the issue was solved...

Thanks,

Joris