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maybe your isp is blocking things when you try and use a default bridged config (the isp is seeing more than 1 MAC address at a single port) have you ever tried to use routed or masquerading network config for internet access? Also curious what DNS your isp provides through DHCP?

semantics of the wording “pass through” might make things murky for those helping. I infer you mean “pass through“ in the generic non-networking way and not IOMMU/SR-IOV. is this external modem a firewall/router. If not any consideration for exposing the Proxmox host directly to wan? Is Proxmox...

I would slow down, your /etc/pve/corosync.conf might already be messy. I have a separate redundant corosync network, but I think like most home users that go this far I first set up clustering through the GUI using my vmbr0 network/IP on all nodes. Then I later added the separate Corosync...

This looks like corosync expects the nodes to be using 10.10.10.1 and 10.10.10.2 not the 10.10.1.10/24 10.10.1.20/24 and 10.10.1.30/24 you set up earlier today.

Correct and Congrats

Since you are starting with a separate cluster network prior to having a cluster try the link below. Read here, https://pve.proxmox.com/pve-docs/pve-admin-guide.html#pvecm_redundancy , find the section copied below to start. Then follow the link within that section to add to a separate cluster...

So you can do either: 1: IOMMU passthrough and select the PCI device directly from the OPNsense vm network hardware setup. Then Proxmox has no way to see either nic. 2. No IOMMU, but use the Linux bridge directly as the OPNsense wan and lan. Both Proxmox and OPNsense have access to the nic.

Read the last line of @mira post above and follow the directions from that link on how to edit. This link will also tell how to work around that fact that edits take effect immediately. As he stated don't forget to increment the config_version (currently at 4 above, increase to 5) when you save...

Neither enp1s0 or enp3s0 are showing up with ip a, so they are not available to use. just in case, did you attempt to do iommu passthrough of the pci card to opnsense? Can't do that and use the same nic as the port for a Linux bridge. if not, maybe consider trying the newest 6.1 kernel, pinnED...

This sounds like a setup issue with pfSense letting vlan5 traffic to/from wan then Or DNS. Can the vm ping 1.1.1.1 or 8.8.8.8?

Look at the bottom of you /etc/corosync/corosync.conf file. Even the one posted above find the totem section, then under that the interface subsection for for your link0 and link1 lines. add the knet_link_priority: lined as @mira stated and Corosync should now use your private ring1 as primary.

Ok, have You double checked the managed switch ports? Not sure of your switch manufacturer nomenclature, but is the switch port connected to eno4 untagged vlan5 and is the switch port connected to pfSense tagged for vlan5? is the Proxmox firewall unchecked on the vm network interface? for...

Happy new year. you do not have to designate the subnet on vmbr1 with the address 10.0.5.0/24 line. Unless you want to have the Proxmox node web gui available to your proxmox guest using vmbr1, I would remove that line, change iface vmbr1 inet static to iface vmbr1 inet manual, and then do a...

@alexskysilk nailed it up above then crossed it out from their second post. Happy new year and glad it is working now.

No real reason to hide internal private addresses unless those are public IPs. Seeing your /etc/network/interfaces files would help garner better specific suggestions. can be done differently, dependent on your gateway/router...

1. https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysadmin_network_configuration good place to start. 2. Either by proxmox node firewall rules dropping traffic to port 8006 on 192.168.3.1 or maybe just removing the 192.168.3.1 address from that Linux bridge all-together as 2 options 3...

Some context for anyone else seeing this for the first time. https://forum.proxmox.com/threads/set-proxmox-cluster-on-seperate-nic.120334/

Nothing looks off with your proxmox node interfaces file. I assume the 10.10.1.10 interfaces file shown and the 10.10.1.30 file are exactly the same? So on the juniper switch does the LACP bond you created there for the VM network also use the default vlan? I see you have set the mtu to 9192...

Just trying to understand your network topology. so you have 2 same computers both using eno4 for this cluster network (10.10.1.10 and 10.10.1.30) and a third computer using enp65s0f1np1 (10.10.1.20). All 3 of these nics plug into your juniper - how are these 3 juniper switch ports configured...

Any vlans or a Managed switch used here?