I've a host 10.10.10.1 which i can ping from other machine but ping was sudden stopped from nms machine where the above IP is being monitored 24/7. any help?
It has being to work so now i'm unable to check in more details. If issue persist. I'll let you know with the findings.
Your going to need to try and do some more diagnosis before we can offer a solution to this. If you run a ping command form the command line on your NMS machine, what do you get back. If you run a tracert from that machine, how far along the chain does it get?
Do you have a firewall on either of those machines, could there be a rule in place to block pings from either machine?
Might run an ARP -a command to see if the MAC address is the same. I had an issue where I rebooted a workstaiton and I could keep pinging it from 1 server, but not from another server while it rebooted. Found that someone had setup a managed switch with the same IP address.
