No communication between two VMs connected to the same VLAN - OpenShift Virtualization

[ark1984]

Dear All,

I am using OpenShift virtulization to run 2 x Windows VMs and 2 x Fedora VMs. All these VMs are connected to a VLAN subinterface configured on a linux bridge.  I used NNCP and NAD create the bridge and subinterfaces. All VMs are able to communicate outside (like google, 8.8.8.8). I can reach all VMs from my external network.  But they cannot ping each other. Firewalls are disabled on all VMs

[Wasim_Raja]

@ark1984 Thanks for reaching out.

The below doc can be handy.

https://www.redhat.com/en/blog/connecting-to-vms-in-red-hat-openshift-virtualization

Let me know if it helps you.

[ark1984]

Hello Wasim,

I have used the same article and connected my VMs to NAD with VLANs on linux bridge (defined using NNCP). Those VMs can reach external services without any issues and I can reach those VMs from external network. 

The problem is that they cann't ping to each other even if they are on the same worker node. 

[Chetan_Tiwary_]

@ark1984  what does the tcpdump see - where is it getting dropped ?

[Wasim_Raja]

@ark1984 Thanks for reaching out.

The below doc can be handy.

https://www.redhat.com/en/blog/connecting-to-vms-in-red-hat-openshift-virtualization

Let me know if it helps you.