```ruby
# -*- mode: ruby -*-
# vi: set ft=ruby
Vagrant.require_version ">= 2.2.0"

$SERVER_BOX = "cilium/ubuntu-dev"
$SERVER_VERSION= "157"
$NETNEXT_SERVER_BOX= "cilium/ubuntu-next"
$NETNEXT_SERVER_VERSION= "30"
```

Bump cilium/ubuntu-next version to 31
user
```ruby
# -*- mode: ruby -*-
# vi: set ft=ruby
Vagrant.require_version ">= 2.2.0"

$SERVER_BOX = "cilium/ubuntu-dev"
$SERVER_VERSION= "157"
$NETNEXT_SERVER_BOX= "cilium/ubuntu-next"
$NETNEXT_SERVER_VERSION= "31"
```
assistant