LMS 4.2 discovery failure

Question

Hi
I have Cisco LMS 4.2 installed i was using SNMP V2c for polling my devices. After i turned on SNMPv3 all devices are reachable and even when i make credentials check it's ok, but the issue when i access any device from search pane it shows me in the collector status " Discovery failure"
Steps i made to troubleshoot but not succeeded :
1. Rediscover Devices
2. Modify SNMP timeout & retry settings
Devices: Catalyst 2960 , Catalyst 3560
I've attached a snapshot of collector error
Please help
Thanks

Answer 1

1. Please refer to the context-sensitive help when you get to this step. It will give you a page with very detailed file formats and fields that are used (see screenshot below from my lab server). That page is also in Chapter 4 of the Inventory Management guide online.
2. Device adjacencies are determined via a correlation of various MIB variables including CDP neighbor details and other details. I recommend you read through Joe Clarke's document on understanding LMS discovery.
One thing to note is that is is best to have the IP addresses of the devices in DNS. If that is difficult for whatever reason, the first create a local hosts file with the devices. You will get better results if the device IPs resolve to host names.