VMBR1 Dropping Internet Connection

longhair

Member
Jun 27, 2014
113
0
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I added another NIC so I am able to have a Windows VM with a "floating" (change the IP address of Windows to have access to physical computers on different subnets instead of making changes to Proxmox and reboot each time) subnet.

While downloading updates for the new VM, the Internet was dropped and wouldn't come back up until I reboot. I tried to download updates again only to have the same thing happen. I decided to just do some browsing the Internet for and about 10 minutes later, the connection dropped.

My /etc/network/interfaces look like this:

Code:
# network interface settings
auto lo
iface lo inet loopback

iface eth0 inet manual

iface eth1 inet manual

iface eth2 inet manual

auto eth3
iface eth3 inet manual

auto bond0
iface bond0 inet static
        address  192.168.3.2
        netmask  255.255.255.0
        slaves eth1 eth2
        bond_miimon 100
        bond_mode 802.3ad

auto vmbr0
iface vmbr0 inet static
        address  192.168.2.2
        netmask  255.255.255.0
        gateway  192.168.1.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

auto vmbr1
iface vmbr1 inet manual
        bridge_ports eth3
        bridge_stp off
        bridge_fd 0
 
I added another NIC so I am able to have a Windows VM with a "floating" (change the IP address of Windows to have access to physical computers on different subnets instead of making changes to Proxmox and reboot each time) subnet.

While downloading updates for the new VM, the Internet was dropped and wouldn't come back up until I reboot. I tried to download updates again only to have the same thing happen. I decided to just do some browsing the Internet for and about 10 minutes later, the connection dropped.

My /etc/network/interfaces look like this:

Code:
# network interface settings
auto lo
iface lo inet loopback

iface eth0 inet manual

iface eth1 inet manual

iface eth2 inet manual

auto eth3
iface eth3 inet manual

auto bond0
iface bond0 inet static
        address  192.168.3.2
        netmask  255.255.255.0
        slaves eth1 eth2
        bond_miimon 100
        bond_mode 802.3ad

auto vmbr0
iface vmbr0 inet static
        address  192.168.2.2
        netmask  255.255.255.0
        gateway  192.168.1.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

auto vmbr1
iface vmbr1 inet manual
        bridge_ports eth3
        bridge_stp off
        bridge_fd 0
Hi,
how looks your client-config?

Which driver do you use (also inside the VM)? virtio - version? or e1000?
Does the same happens with an linux-VM?

If you look with tcpdump on the host, you see traffic from the VM or from the network only?

I assume your guest has network-trouble and not the bridge.

Udo
 
Client config same as other VMs that work. Only difference is the network bridge.

Using virtio drivers for everything.

Same thing happening with a linux vm using vmbr1.

tcpdump shows IP (of node name) > IP (of vm) for both vmbr0 and vmbr1 - just started up the vm on vmbr1 again.

It seems to be working right now so it could have been .... Typed too soon :(

I'm going to remove the autostart from ETH3 and reboot Proxmox to see if that helps.
 
Removing the autostart from ETH3 did not help.

Some web pages load while others do not.

I'm going to pull the card and put the idea on the back burner...
 

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