IP Switch discover as duplicate in ServiceNow Discovery

[Nikhil kumar ma]

Hi,

There is a IP Switch in ServiceNow discovery keeps getting discovered via ServiceNow with the same name and serial number, but with the different IP address. 

Please suggest what to do to resolve this issue.

Thank you

[VivekSattanatha]

Hi Nikhil,

Most of the time the IP switches are having more than one ip address so when you have schedules with both of the ip address then both would be discovering the same the server only.

Regards,

Vivek

[shloke04]

Hi @Nikhil kumar maan 

This can happen a IP switch might have different IP address for the same switch. There is a OOB property which you can enable to stop this from being happening if you want.

Refer below:

glide.discovery.enforce_ip_sync --> Set this Property to false

In order to access this property type in "sys_properties.LIST" in Application navigator and then make it to false.

Also please refer below thread on the same issue which might help you here:

https://community.servicenow.com/community?id=community_question&sys_id=3948165f1b9ae0d038739979b04bcb24

https://community.servicenow.com/community?id=community_question&sys_id=dcc93f47db71089023f4a345ca96194c

Hope this helps. Please mark the answer as correct/helpful based on impact.

Regards,
Shloke

[chuckm]

This is a known issue that started occurring when ServiceNow Discovery moved from Probe-based discovery to Pattern-based discovery for switches.  For Probe-based discovery for switches, the extra IPs were ignored. When ServiceNow implemented Pattern-based discovery for switches, the multiple switch discovery occurred.

This is documented in community article: Duplicate Discovery of Switch in One Discovery Schedule.

It is also documented in KB0759072 Pattern based discovery does not detect extra IP Addresses leading to concurrent discoveries and higher DB load.

The issue has not been completely fixed and the reason why the IP Switch keeps getting multiple discoveries. Setting the glide.discovery.enforce_ip_sync to false does not resolve the issue.

Some other community articles that might be helpful:

Issue in CI discovery with Multiple IP address

Whats the use of this Discovery property "glide.discovery.enforce_ip_sync"

Server Discovery - IP field being wiped out or constantly changing

[Rahul Priyadars]

Hi Nikhil

Are you saying Duplicates are getting created with Same Name and Serial No and serial no type ?

Regards

RP