Question

Networking not working after droplet resize

Posted on August 28, 2019
Ubuntu 18.04 Networking
Asked by Sachin Mehta

Hello Everyone, I resized my droplet yesterday and the process went through without any errors or warnings. When I powered on, I discovered that my networking had stopped working. I’m able to access it through the web console but not able to ping my IP from outside and ping from within the droplet doesn’t work. It shows: “Network is unreachable” I’m not even able to ping the gateway.

I checked my routing table and it looks empty. When I try to add a routing rule it says “Error: Nexthop has invalid gateway”

Here’s my /etc/network/interfaces : https://prnt.sc/oygq1e

Anybody tell me what I’m missing or doing wrong?

Thanks!

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Sachin Mehta • August 30, 2019

Accepted Answer

So I managed to fix the issue. Turns out my both interfaces eth0 and eth1 are going down after a reboot. I have to run the following after that:

ip link set eth0 up ip link set eth1 up ip addr flush dev eth0 ip addr add X.X.X.X/20 dev eth0 route add default gw Y.Y.Y.Y eth0

X.X.X.X is your droplet’s IP and Y.Y.Y.Y is your gateway

These settings vanish after a reboot. Anyone who know why?

@alexgeorgiev Thank you so much for your help :)

Thanks!

vasiliypupkin • April 13, 2020

Thanks a lot for the solution! Got the same issue on 2 different droplets without any resizing (once in Dec.2019, once in Apr.2020). We were not doing anything to the servers or software, it just happened by itself. DigitalOcean support yet insists it happened due to our actions.

alexdo

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