MAC addresses are resolved but can't communicate between guests and host

[klee]

Hello! I'm experiencing some networking issues with my new Proxmox VE setup and would greatly appreciate your assistance.

I'm relatively new to Proxmox and have been attempting to configure VNet (Virtual Network) functionality, but I've encountered connectivity problems that I haven't been able to resolve.

Here's what I've configured so far:

1. Created a Simple Zone
2. Established VNet and Subnet
3. Network Bridge Assignment
   

The Problem I'm Experiencing:

After completing the VNet setup, I'm unable to establish any network connectivity between nodes. Specifically:

• Host-to-guest communication fails completely
• Guest-to-guest communication between VMs also fails
• No packets are successfully transmitted between any IP addresses within the network

Troubleshooting Steps Already Taken:

• Verified that arp -a correctly resolves and displays the proper MAC addresses for all devices
  
  
• Confirmed that all firewalls (both on Proxmox host and guest systems) are completely disabled
• Double-checked the network bridge configuration and subnet assignments
• Check iptables has correct forwarding rules
  

Despite these verification steps, the ping tests consistently fail, and I'm unable to determine what might be causing this connectivity issue.

Could you please help me identify what I might be missing in my VNet configuration or suggest additional troubleshooting steps? I'm particularly interested in understanding if there are any common configuration pitfalls that new Proxmox users often encounter with SDN/VNet setups.

Thank you very much for your time and assistance. I really appreciate any guidance you can provide to help resolve this networking challenge.