Private network issue

[sahostking]

Hi

We have a few Proxmox Servers but cannot seem to figure out why this one Proxmox server cannot see the private backup network but it's KVM Guests can connect via it fine.

In otherwords the node cannot but the KVM guests can.

Any ideas?

Here is the network config:

auto lo
iface lo inet loopback

auto vmbr0
iface vmbr0 inet static
address 1.1.1.1
netmask 255.255.255.224
gateway 1.1.1.2
bridge_ports eth0
bridge_stp off
bridge_fd 0
up sleep 5; ethtool -s eth0 speed 100 duplex full autoneg off

auto vmbr1
iface vmbr1 inet static
address 10.0.0.10
netmask 255.255.255.0
bridge_ports eth1

More details:

2 KVM VMS on this node. IP 10.0.0.57 and 10.0.0.58 can see 10.0.0.200 the backup server fine.

But 10.0.0.10 cannot? weird as the above is transferring over the backup network vmbr1.

 

[Q-wulf]

I assume your 2 VM's use vmbr1 as a bridge for their vNics connected at 10.0.0.57 and 10.0.0.58 respectively ?? and eth1 is connected to a switch that is connected to the 10.0.0.200 node ?

Any chance you use a vlan Tags and just forgot to set it for the "node" ?

 

[sahostking]

Come to think of it initially when we set it up we had vlan tag 100 on the KVM networks. Then they were not communicating so removed the vlan tag 100from kvm guests and restarted network. Then they were communicating between one another and the backup server. But node itself was not and still is not Very lost by this.

The only difference between this server and the others is this is PRoxmox 4.1 and the others are proxmox 3.4 due to openvz being used on the old ones still.

 

[Q-wulf]

can you post:

• cat /etc/network/interfaces for the vms ? preferably in

  [code] [/'code]

  tags ?
• Also a list of what VMBR each vNic for each VM on the proxmox-node is using??
• cat /etc/network/interfaces for the Backup-server ? preferably in

  [code] ['/code]

  tags ?

The only difference between this server and the others is this is PRoxmox 4.1 and the others are proxmox 3.4 due to openvz being used on the old ones still.

can you specify who runs 4.1 and who runs 3.4 as being relevant to your Proxmox-node, backup server and your 2 referenced vms ??

 

[sahostking]

Sorted by doing upgrades to 4.1.5 and then rebooting.

All working