Redhat 7.6 under Hyper-V 2012 unreachable

General Linux Help
1

Dear All,

I have a new Redhat 7.6 Server virtual machine created in Hyper-v Server 2012.
the issue is after some time (i mean if i am not connecting to vm for example 2 hours) the Redhat server unreachable & can’t ping but… when i login to the redhat vm through hyper-v the redhat virtual machine comes up and running.

how I can stop this problem?

2

one more information…
I informed that some one from my team he disabled the firewalld.service
do you think this is related to the incident?

  • when I login to the virtual machine from hyper-V then every things working fine and I can login from anywhere SSH

do you think is issue related to the NIC configuration like wake up or the system goes sleep after some time???

3

Hi Ali,
welcome to our forum. The issue you mention seems related to this article from RedHat:

It could have been also a firewall misconfiguration or underlying issue with HyperV / storage.

4

Dear Fabek,
Many Thanks…,
Actually I have do some troubleshooting on network level so, I report this to our network team to clear ARP cache in network hardware in HP Core Switch.
This change will be apply on after tomorrow I will wait till 30 of June then I will update you if this solve permanently.

Thank you…