I am running out of ideas on what the problem can be. I have 3 Virtual Machines (Windows Server 2019, and two RedHat 9 Servers) that are all connected to a bridged network (br0). Upon starting up any of the VM's I am able to ping from my desktop and get a response, after the 8th ping I get an error stating that "Destination host unreachable." I can reporduce this issue by turning off the network on the VM and re-enabling it, I will get 8 or so successful pings but then it will fail with "Destination host unreachable."

 

Whats odd to me is that from any of the VM's I can ping my gateway and any other device on the network. This led me to believe that I had a firewall issue to start with, I disabled all software firewalls on the VM's and even disabled my firewall on the OPNSense Router.

 

Things that I have tried so far:

1) Changing the Network Model

2) Creating a Separate Bridge and dedicated vhost

3) Refreshing the MAC Address

4) Setting up a static reservation for the MAC Address

 

Current Network Topology
ATT Gateway (IP Passthrough) --> OPNSense Router --> Ruckus Switch --> Dell Switch --> Unraid Server

 

Gateway: 192.168.10.254/16

 

Unraid Network Settings

 

Interface: eth0

Bonding: No

Bridging: Yes

Bridging Members: eth0

Network Protocol: IPv4 Only

IPv4 Address: Automatic (I setup Static Reservation on the OPNSense Router)

IPv4 Address: 192.168.50.30

IPv4 default gateway: 192.168.10.254

IPv4 DNS server assignment: Automatic

Enable VLANs: No

 

Routing Table: 

IPv4| default | 192.168.10.254 via br0 | 1075

IPv4 | 192.168.0.0/16 | br0 | 1075

 

Test VM Settings

Network Source: br0

Network Model: virtio

Edited May 24, 20242 yr by jholderman
Adding more troubleshooting I did

This was resolved by disabling unbound from my OPNSense Firewall and using DNSMASQ instead. I am not sure what Unbound was doing to cause any issues.