DELL-Raj SFor the device that is generating system up/down alert, can you send the output of this command after it has run for at least 60 seconds ?
ping -w 400 -n 1 IPaddress/Hostname -t
Can you also share the ICMP timeout value in discovery wizard for this device/range ?

C:\Windows\system32>ping -w 400 -n 1 192.168.1.232 -t
Pinging 192.168.1.232 with 32 bytes of data:
Reply from 192.168.1.232: bytes=32 time=70ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=28ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=28ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=28ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=28ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=28ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=27ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=27ms TTL=128
Reply from 192.168.1.232: bytes=32 time=28ms TTL=128
Reply from 192.168.1.232: bytes=32 time=28ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Reply from 192.168.1.232: bytes=32 time=29ms TTL=128
Ping statistics for 192.168.1.232:
Packets: Sent = 63, Received = 63, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 27ms, Maximum = 70ms, Average = 29ms
Control-C
^C
ICMP Timeout: 1500
Retries: 5