First time for me coming across this situation for some reason, but I have two NIC's in a VM and need both connected to the same subnet as each IP will run host different but related services.
Previous configurations like this, I have just had two IP's on a single NIC (eg: eth:0, eth:1). However, when trying to do as eth0 and eth1, I am struggling.
Done a lot of reading and can see and (broadly) understand the problem in terms of routing challenges created by the configuration.
Most of the articles that I have read have instructions for older Linux/Ubuntu versions, whereas I am using a newer version with Netplan. Have tried translating the older configuration instructions into Netplan world, but am not getting any success.
For example, when I do a "ping -I 10.10.10.10 www.google.com", not getting a response, which is indicating a setup / routing / arp routing issue (obviously). Has anyone done what I am trying to achieve with a Netplan configuration and can share steps / configuration necessary to achieve (as well as any other configuration required such as correct settings for net.ipv4.conf.all.arp_filter (or equivalent?)
My Netplan is below for reference. I would also like to know if doing this and changing ARP filtering defaults is a good/bad idea? Are there any drawbacks from either a security or other perspective?
Thanks, Jab
network:
ethernets:
eth0:
addresses:
- 10.10.10.73/27
dhcp4: no
routes:
- from: 10.10.10.73
on-link: true
to: 0.0.0.0/0
via: 10.10.10.65
metric: 100
nameservers:
addresses:
- 8.8.8.8
- 8.8.4.4
eth1:
addresses:
- 10.10.10.74/27
dhcp4: no
routes:
- from: 10.10.10.74
on-link: true
to: 0.0.0.0/0
via: 10.10.10.65
metric: 1000
nameservers:
addresses:
- 8.8.8.8
- 8.8.4.4
version: 2
