Score:0

Ubuntu

my network is unreachable

t0ny1402

4/3/23, 4:46 PM

i'm using ubuntu 20.04 on a virtual machine and i have changed mi ip conf from dymanic to static, but i do not have network connection; the file 00-installer-config.yaml located at /etc/netplan was at the beginning:

network:
  ethernets:
    enp0s3:
      dhcp4: true
  version: 2

i changed the file, through nano, to:

network:
  ethernets:
    enp0s3:
      dhcp4: no
      addresses: [10.10.2.188/24]
      gateway4: 10.10.0.1
      nameservers:
        addresses: [10.10.1.7, 10.10.0.1]
  version: 2

then i use the command $sudo netplan apply and i do not get any error, although i can see my host computer through ping, i do not get any network connection.

Here is an output from netplan debug:

user:~$ sudo netplan --debug generate
DEBUG:command generate: running ['/lib/netplan/generate']
** (generate:1348): DEBUG: 16:04:25.389: Processing input file /etc/netplan/00-installer-config.yaml..
** (generate:1348): DEBUG: 16:04:25.391: starting new processing pass
** (generate:1348): DEBUG: 16:04:25.392: We have some netdefs, pass them through a final round of validation
** (generate:1348): DEBUG: 16:04:25.394: enp0s3: setting default backend to 1
** (generate:1348): DEBUG: 16:04:25.395: Configuration is valid
** (generate:1348): DEBUG: 16:04:25.397: Generating output files..
** (generate:1348): DEBUG: 16:04:25.398: openvswitch: definition enp0s3 is not for us (backend 1)
** (generate:1348): DEBUG: 16:04:25.400: NetworkManager: definition enp0s3 is not for us (backend 1)
(generate:1348): GLib-DEBUG: 16:04:25.401: posix_spawn avoided (fd close requested)
(generate:1348): GLib-DEBUG: 16:04:25.411: posix_spawn avoided (fd close requested)

I know it is something simple, but i do not understand why this is not working. Am I missing something?

Thanks in advance.

@chili555 this is the file hook-network-manager:

#!/bin/sh 
# this file is part of cloud-init. See LICENSE file for license information #
# This script hooks into NetworkManager(8) via its scripts 
# arguments are 'interface-name' and 'action'
#
is_azure() {     
    local dmi_path="/sys/class/dmi/id/board_vendor" vendor=""     
    if [ -e "$dmi_path" ] && read vendor < "$dmi_path"; then         
        [ "$vendor" = "Microsoft Corporation" ] && return 0     
    fi     
    return 1 
}
 
is_enabled() {     
    # only execute hooks if cloud-init is enabled and on azure     
    [ -e /run/cloud-init/enabled ] || return 1
    is_azure
}

if is_enabled; then
    case "$1:$2" in
        *:up) exec cloud-init dhclient-hook up "$1";;
        *:down) exec cloud-init dhclient-hook down "$1";; 
    esac
fi

0 + 0

server

networking

netplan

Doug Smythies

4/3/23, 6:47 PM

Your gateway is not on the same sub-net as your IP address. You might have to specify a renderer, maybe networkd maybe something else, I don't know.

t0ny1402

4/3/23, 7:43 PM

I already did it, i declared it just below version, `renderer: networkd` and still nothing happens

chili555

4/3/23, 8:59 PM

It appears that Network Manager is running. I'd set the static IP in NM and revert netplan. Welcome to Ask Ubuntu.

t0ny1402

4/3/23, 9:21 PM

@chili555 how do I do that??, I mean, I have one file `hook-network-manager` located at `/etc/NetworkManager/dispatcher.d`/n `#!/bin/sh` `# This file is part of cloud-init. See LICENSE file for license information.` `# This script hooks into NetworkManager(8) via its scripts` `# arguments are 'interface-name' and 'action'`

t0ny1402

4/3/23, 9:26 PM

`is_azure() { local dmi_path="/sys/class/dmi/id/board_vendor" vendor="" if [ -e "$dmi_path" ] && read vendor < "$dmi_path"; then [ "$vendor" = "Microsoft Corporation" ] && return 0 fi return 1 } is_enabled() { # only execute hooks if cloud-init is enabled and on azure [ -e /run/cloud-init/enabled ] || return 1 is_azure } if is_enabled; then case "$1:$2" in *:up) exec cloud-init dhclient-hook up "$1";; *:down) exec cloud-init dhclient-hook down "$1";; esac fi`

chili555

4/3/23, 10:18 PM

What does this report? `ps aux | grep Network` also: `sudo service NetworkManager status | grep Active` Please edit your question to show the result.

t0ny1402

4/6/23, 2:22 PM

@chili555 the first one gives: `antonio 1362 0.0 0.0 6432 740 tty1 S+ 14:14 0:00 grep Network ` ; and sudo service.. says `Unit NetworkManager.service could not be found`

chili555

4/6/23, 2:52 PM

NM is apparently not running and interfering. However, as stated above, "Your gateway is not on the same sub-net as your IP address." As well, the DNS nameserver addresses are suspect. Please clarify.

t0ny1402

4/6/23, 6:20 PM

@chili555 those are the DNS nameservers from the domain server and the firewall respectively, and, because i am working with hierarchy into a firewall, that is why the IP address and the gateway are not in the same sub-net

Doug Smythies

4/7/23, 6:57 PM

Your sub-net includes the range 10.10.2.0 to 10.10.2.255. Your gateway is not within that range.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: my network is unreachable

TH: เครือข่ายของฉันไม่สามารถเข้าถึงได้

RO: rețeaua mea este inaccesibilă

RU: моя сеть недоступна

VI: mạng của tôi không thể truy cập được

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