I have a few servers connected to a CRS510-8XS-2XQ which are essentially VM hosts. Is there any reason why the switch is not detecting the VMs as neighbors on the list nor is it LLDP packets from the VMs and the Host being forwarded upstream?
The VM hosts are Proxmox. They both have lldpd running and they can see the switch as neighbor. However the Gateway (Ubiquiti EFG) doesn’t see the switch, nor anything connected to it. I’ve inspected the packets on the Proxmox hosts and the LLDP packets are leaving the interfaces connected on this switch. They are just not listed in the switch, nor are the forwarded upstream. On the Gateway side, I don’t see anything coming, including the switch itself.
LLDP/CDP has to be “listened to” on the individual physical interfaces, not the bridge interface.
(Mikrotik MNDP, on the other hand, needs to be on layer 3, so e.g. vlan subinterfaces if you have those attached to your bridge).
In the discovery settings GUI the field is named “Interface:” but that’s a mistake, it takes name of an “interface list” type item.
The default “LAN” list or an equivalent you customized is usually a good choice; you can also make a “no-discovery” list and tick the !negation option (little box to the left of drop-down).
Thanks for the reply. That is what I figured as well.
But still, as you see on that list (which I called Bridge), I have the ports of the Upstream Gateway (Ubiquiti’s EFG), a Downstream Switch, and two bonds for Downstream Proxmox servers which have a bunch of VMs (bonds Yoda and Skywalker).
I’ve watched on the server that the LLDP packets are being sent from the Proxmox server and getting out on the interfaces on those bonds. From the picture you see the actual physical interfaces being detected on the Switch. However, none of the virtual machines running on those hosts which have real MACs and the hosts have lldpd running. If I remove the physical NICs and put them on a Ubiquiti Switch, or the Gateway, they receive the LLDP packets and show the VMs along with the hosts as neighbors. Only on the MT switch that they aren’t.
… I’m sorry, I completely didn’t register the upper half of your screenshot.
The “bridge” name of the list made me wonder “hm, since when you can select individual interfaces in this…” but I completely missed the point.
I shouldn’t post this late in the day. >_<
So to continue with stupid questions…
if you for a moment switch the selection list to “all interfaces” or something like “[!] list-of-WAN-interfaces”, does anything change here?
