Please I need your urgent help. [VM with multiple interfaces]

[lokipoki98]

I have created a vm instance with multiple network interfaceses (nic0, nic1, nic2) all these interfaces showing internal and external ips. however I can curl with only nic0 (i.e ens 4) but rest of interfaces giving me this error:
command: ping -I ens6 8.8.8.8
PING 8.8.8.8 (8.8.8.8) from 10.2.0.4 ens6: 56(84) bytes of data.
From 10.2.0.4 icmp_seq=1 Destination Host Unreachable
From 10.2.0.4 icmp_seq=2 Destination Host Unreachable
From 10.2.0.4 icmp_seq=3 Destination Host Unreachable
^C
--- 8.8.8.8 ping statistics ---
5 packets transmitted, 0 received, +3 errors, 100% packet loss, time 4073ms

how can i fix this problem

[Aaditya_samriya]

Certainly! Here’s a concise summary covering the key topics related to your issue with multiple network interfaces on your VM instance:

1. Configuration Check: Verify that all network interfaces (nic0, nic1, nic2) are correctly configured with the appropriate IP addresses (both internal and external).

2. Routing and Routes: Ensure that the routing table includes routes for the additional interfaces. Confirm that the default route points to the correct gateway for each interface.

3. Firewall Rules: Check for restrictive firewall rules that might block traffic on the additional interfaces. Review both VM-level and network-level firewall rules.

4. Interface State: Verify that the additional interfaces (nic1 and nic2) are in the UP state using ip link show.

5. Network Services: Confirm that necessary services (DHCP, DNS, routing) are running and configured correctly.

6. Logs and Diagnostics: Check system logs for error messages related to network interfaces. Use tools like traceroute to diagnose connectivity issues.

Remember to adapt these all steps to your specific setup.