Clear CDP - MS225

[dcountryman68]

I am trying to update my CDP listing within my environment. Several older Cisco APs were connected but have been removed over 12 hours ago and they are still showing in CDP, I also have a couple of HP Procurve switches that have been removed from the network that are still showing in CDP.

Is there a way to for CDP to clear?

Thank you

[Nolan H.]

Usually clears out on its own, though I've never timed it to see how long it takes. I would imagine it would be 12 or 24 hours. Or if you plug something else it, it will override.

I don't know of any method to clear that info though.

[redsector]

Did you test to shut the ports for about 15minutes? On Cisco "classic" products the arp timeout is standard on 900seconds =15 minutes.

[dcountryman68]

I have not, thank you for the thought, but of course everything is in production now.

[Nash]

I've seen it clear within a couple of hours on its own, but I was using a two hour time window. Double check your time window. It can be up to a month.

LLDP and CDP info is sent to the dashboard every ten minutes.

N.B. I do primarily interact with CDP via the API, because I'm often needing it for all devices in a network including the MX. You have to explicitly declare a range in seconds of less than one month there.

You can do a quick test of what the API endpoint sees in Postman. You'll need to:

1. "List organizations that the user has privileges on",
2. Make an "organizationId" variable and populate it with the org id.
3. "List the networks in an organization.

4. Make a "networkId" variable and populate it.

5. Make a "serial" variable and put your device's serial number into it.
6. Then use Device/"List LLDP and CDP information for a device".

[dcountryman68 · Accepted solution]

AN update. The CDP/LLDP seems to have cleared, but it took a full weekend to do so. so maybe the refresh window is 48 hours.

Thank you everyone for your suggestions.