iDrac intermittent packet loss

We have some new Dell R230 and it has a weird issue.

Some of the iDrac when pinging has replies but as soon as enter the creds and login then ICMP becomes Destination unreachable and request timedout which means iDrac isn't reachable either. The ICMP will recover after few hours and iDrac is reachable. But then again attempting to login causes ICMP to return destination unreachable and iDrac will be down for a couple of hours.

What can be the reason? I'm thinking about upgrading firmware if available but I can't do it remotely atm.

This is iDrac 8. Only one or two iDrac's are stable. Rest of them have the same issue as reported above.

When attempting to login:

Pinging 10.10.10.10 with 32 bytes of data:
Reply from 10.10.10.10: bytes=32 time<1ms TTL=64
Reply from 10.10.10.10: bytes=32 time<1ms TTL=64
Reply from 10.10.10.10: bytes=32 time<1ms TTL=64
Request timed out.
Reply from 10.10.10.10: Destination net unreachable.
Reply from 10.10.10.10: Destination net unreachable.
Reply from 10.10.10.10: Destination net unreachable.
Reply from 10.10.10.10: Destination net unreachable.
Reply from 10.10.10.10: Destination net unreachable.
Request timed out.
Request timed out.
Reply from 10.10.10.10: Destination net unreachable.
Reply from 10.10.10.10: Destination net unreachable.
Reply from 10.10.10.10: Destination net unreachable.
Reply from 10.10.10.10: Destination net unreachable.