While pinging gateway (subnet) getting Destination host unreachable.

[kartheek.kp]

hello,

I am configuring 3 -node proxmox cluster and installed Proxmox VE but i am unable to access webUI also unable to ping Gateway aswell.
The servers were earlier used for VMware ESXi and it has two NICs and when both NICs are connected then only I am able to ping Gateway. How i can achieve this on Proxmox setup.


Please find my interfaces file

 

[bbgeek17]

Hi @kartheek.kp ,

Your sanitized configuration file shows that you only have one NIC configured with VLAN/IP.
However, you only presented the saved configuration, not the running configuration/state. It is critical to provide all sides of the system (ip a).
Additionally, obscuring private LAN IP is always counterproductive when one is asking for help with basic network connectivity.

Please examine and if necessary provide :
- saved configuration (cat /etc/network/interfaces) as text output encoded with CODE tags (</>)
- running configuration (ip a) with single NIC
- ping output with single NIC
- running configuration with both NICs plugged
- ping output with both NICs connected
- "arp -an" output with both NICs connected

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[kartheek.kp]

Hi @bbgeek17,

Please find the output of IP a (both plugged) and /etc/network/interfaces

I am unable to take ssh and using HP ILO console to access the host. Hence sharing the output as screenshots.

 

[bbgeek17]

Please find the output of IP a (both plugged) and /etc/network/interfaces

Thanks for the additional screenshots. They again show the primary issue - you're unable to ping the gateway when only one NIC is connected.

The most likely explanations are either that the wrong physical port is in use, or there's a VLAN misconfiguration (one of the configuration lines related to VLAN disappeared between your posts).

You mentioned that things start working when a second port is connected. It would be helpful if you could provide evidence of that. Once the network is up, you should be able to install the arp tool with apt install net-tools.

Have you discussed this with your network team?

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox