We recently installed Ciscoworks LMS 2.6 on our client with just 16 switches on their network. They are running on a flat vlan which is vlan 1. Same configuration of snmp version 1 for all the switches. Problem is 2 switches at one rack is having intermittent connection to Ciscoworks. On that same rack we have 7 switches but its just the 2 switches that's having problems. We tried to do a "clear ip arp <ip address of Ciscoworks server>" on both switches and it resolved the problem momentarily but after a few minutes, Ciscoworks server cannot be pinged from the switch and resulted a red icon on the Campus Manager>Topology Services.
The server is connected to the Cisco 3750 core switch and I also did a clear ip arp on that switch but problem still comes back.
How can we resolve this problem?