Doesn't work network in host

A

artem1992

New Member
Dec 21, 2015
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My network configuration (i found this in next topic):

To /etc/iproute2/rt_tables file i added:
Code: 
100  vlan169

/etc/network/interfaces:

Code: 
auto lo
iface lo inet loopback

auto vmbr0
iface vmbr0 inet static
        address 192.168.0.103
        netmask 255.255.255.0
        gateway 192.168.0.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

auto vmbr2
iface vmbr2 inet static
        address  192.168.169.254
        netmask 255.255.255.0
        bridge_ports none
        bridge_stp off
        bridge_fd 0
        post-up ip rule add from 192.168.169.0/24 iif venet0 table vlan169
        post-up ip route add default via 192.168.0.1 dev vmbr2 table vlan169
        post-up ip route flush cache
        pre-down ip rule del from 192.168.169.0/24 iif venet0 table vlan169
        pre-down ip route del default via 192.168.0.1 dev vmbr2 table vlan169
        pre-down ip route flush cache

Than i create windows vm, did set bridge mod (bridge vmbr2) and set up network in windows:

0ExTPCk.png


But ping 192.168.169.245 doesn't work. Please help me. What i did wrong?
 
i'm no expert on Linux-native bridges (i only do openvswitch with proxmox exclusively and get someone else to do the complicated linux-native networking stuff if that ever comes up), so this might not be expert testimony ...

- but did you just assign the same IP for the bridge AND the VM's vNic ?
- And more to the point, vmbr2 is not connected to a physical nic ?

have a look here for examples:
https://pve.proxmox.com/wiki/Network_Model
https://pve.proxmox.com/wiki/Open_vSwitch

ps.: with next topic you mean this one https://forum.proxmox.com/threads/add-vlans-without-reboots-network-restarts.25241/ right ? the link provided there for vlans refers to Pve 1.x / 2.x
 
I do not know how you'd do ip-forwarding on a linux-native bridge. As i said, not my strong suit.

This is a local Machine ? Not running in a datacenter like hetzner/ovh ? So you can run multiple macs from the eth0/vmbr0, right?

i'd then do the following:
  1. attach your physical eth0 to vmbr0. (linux native or openvswitch)
  2. Add a IP for your NODE so you can access the GUI.
  3. Setup your VM
    1. for each vNIC do the following via GUI:
      1. add a vNic
      2. Assign it a Vlan-tag "e.g. 169" if your into vlan tagging, leave it out if your not into tagging.
      3. Assign it a Bridge "vmbr0"
  4. Restart your VM.
  5. Configure your Windows VM
    1. set your ipaddress 192.168.x.y
    2. set the appropriate subnet add your gateway 192.168.0.1


That should work. for a single Physical Nic. For multiple Nics you can do bonding / multiple bridges.
 
This is a local Machine ? yes
Please, can you explain what you mean:
  1. attach your physical eth0 to vmbr0. (linux native or openvswitch)
  2. Add a IP for your NODE so you can access the GUI.
So this is my config, is it correct?
qj6QcOI.png

Code: 
auto lo
iface lo inet loopback

iface lo inet loopback

iface eth0 inet manual


auto vmbr0
iface vmbr0 inet static
        address  192.168.0.103
        netmask  255.255.255.0
        gateway  192.168.0.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

Setup your VM

eeXiB0q.png

Z45RZzU.png


trying do ping:
uz9MuWK.png

 
that is "odd".

I assume you know about this gem:
The network configuration is usually changed using the web interface. Changes are stored to /etc/network/interfaces.new, and are activated when you reboot the host. Actual configuration resides in /etc/network/interfaces. The following examples list the contents of that file.
Click to expand...

Q0: have you done "ifconfig" on your Proxmox-node to verify you have only that interface up with the setting you posted ? Cannot tell from your screenshot if you restarted networking or not.
Q1: from VM can you ping your proxmox host ? as in 192.168.0.103 ?
Q2: You installed your virtio-network drivers i assume (otherwise you'd not have that virtual interface in windows)
Q3: the mac-Address is unique for your network right ?
Q4: what is the output of ifconfig equivalent on windows ?
Q5: which windows version is that ? can not tell from screenshot.
Q6: your Proxmox-node can ping 192.168.0.1 and it is the gateway, right ?
 
Last edited:
thank you for your help

Q0 - i did restart

Code: 
root@pve:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 20:cf:30:12:18:c2
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:19500 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14266 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5148947 (4.9 MiB)  TX bytes:7284939 (6.9 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:16155 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16155 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:5332995 (5.0 MiB)  TX bytes:5332995 (5.0 MiB)

tap101i0  Link encap:Ethernet  HWaddr 72:56:6b:e3:43:a6
          inet6 addr: fe80::7056:6bff:fee3:43a6/64 Scope:Link
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:267 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:1258 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:32196 (31.4 KiB)  TX bytes:168 (168.0 B)

vmbr0     Link encap:Ethernet  HWaddr 20:cf:30:12:18:c2
          inet addr:192.168.0.103  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::22cf:30ff:fe12:18c2/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:17240 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12115 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:3619948 (3.4 MiB)  TX bytes:7127871 (6.7 MiB)

q1: from VM can you ping your proxmox host ? as in 192.168.0.103 ?
No

Q2: You installed your virtio-network drivers i assume (otherwise you'd not have that virtual interface in windows)

yes

Q3: the mac-Address is unique for your network right ?
yes

Q4: what is the output of ifconfig equivalent on windows ?
cNujcsw.png

also i tried set gateway 192.168.0.103 doesn't work too (
Q5: which windows version is that ? can not tell from screenshot.
windows XP
Q6: your Proxmox-node can ping 192.168.0.1 and it is the gateway, right ?
yes i can ping and it is gateway.

thanks
 
Last edited:
Q7: I can not remember, does Windows XP require a reboot after you change the network settings ?
Q8 It says "local area connection 4" - are there any other "active adapters" ?
Q9: i'd say your /etc/network/interfaces on your Proxmox-node is setup correctly. Can you try and create a LXC and assign it an ip of 192.168.0.x/24 start it and ping it from your proxmox-node ?
Q10: can you stop the windows firewall ? According to a couple of threads i found it blocks pings by default :)
Q11: i just stumbled upon this: https://pve.proxmox.com/wiki/Windows_XP_Guest_Notes suggestion: setup a second vNic for that VM. use different mac and choose rtl8139 instead of virtio. If you have a DHCP server in your network, see if you can get that Vm to get a ip auto-assigned. If so, your virtio-driver might not be working.
 
Last edited:
Q8 It says "local area connection 4" - are there any other "active adapters" ?

cNujcsw.png


no
Q7: I can not remember, does Windows XP require a reboot after you change the network settings ?
no

Q9: i'd say your /etc/network/interfaces on your Proxmox-node is setup correctly. Can you try and create a LXC and assign it an ip of 192.168.0.x/24 start it and ping it from your proxmox-node ?

Code: 
root@pve:~# ping 192.168.0.105
PING 192.168.0.105 (192.168.0.105) 56(84) bytes of data.
64 bytes from 192.168.0.105: icmp_seq=1 ttl=128 time=2.46 ms
64 bytes from 192.168.0.105: icmp_seq=2 ttl=128 time=1.59 ms
64 bytes from 192.168.0.105: icmp_seq=3 ttl=128 time=2.02 ms
^C
--- 192.168.0.105 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 1.599/2.031/2.469/0.357 ms
ping from pve server to windows vm works

ok i will try install linux vm
 
Well firewall is stopped.

: i just stumbled upon this: https://pve.proxmox.com/wiki/Windows_XP_Guest_Notes suggestion: setup a second vNic for that VM. use different mac and choose rtl8139 instead of virtio. If you have a DHCP server in your network, see if you can get that Vm to get a ip auto-assigned. If so, your virtio-driver might not be working.

thanks i will try this
 
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