[SOLVED] Strange issue : trying to reach the host with a second NIC

[lxiosjao]

Hi,

I yesterday added a nic in my host with 2x1Gb ethernet port.

New PCI nic :
- 01:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)
- 01:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)
Motherboard nic :
- 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 05)

PVE Manager Version : pve-manager/7.3-3

Here my config :





I can access to the webUI via 192.168.10.50 (mb nic) and via 192.168.10.30 (LAG).

But if I disconnect the mb nic cable (192.168.10.50) :
- I can't reach the host via 192.168.10.30 : no SSH and no webUI if the mb nic is disconnected.
- But I can reach all the guests VMs using vmbr0...

The firewall is disabled in the host.

Any idea why ?

Thanks

 

[B.Otto]

Hello,

this looks like a routing issue.

Both 192.168.10.50 and 192.168.10.30 are in the same subnet, but when your PVE wants to send a packet to a device in the subnet 192.168.10.*, it has to choose one of the two interfaces vmbr0 and eno1 to send the packet via.

Generally, don't give several IP addresses of the same subnet to different interfaces.

Kind regards,
Benedikt

 

[lxiosjao]

Hello,

Oh, thanks for the explain. It works now!

Thank you