User`s guide

Managing Parallels Server Bare Metal Network 150
Connecting Containers to Virtual Networks
With the implementation of veth virtual adapters allowing Containers to function as full
participants on the network, it has become possible to include Containers in a wide range of
network configurations the most common of which are Ethernet networks and VLANs (virtual
local area networks). The process of connecting veth virtual network adapters to an Ethernet
network or to a VLAN is carried out using certain physical and VLAN adapters, respectively,
available on the server and involves completing the following tasks:
1 Creating a Virtual Network that will act as an intermediary between the veth adapters and
the physical/VLAN adapter.
2 Connecting the veth virtual adapters you want to include in an Ethernet network/VLAN to
the Virtual Network.
3 Joining the Virtual Network where the veth virtual adapters are included to the
corresponding physical/VLAN adapter.
After completing these tasks, the Container virtual network adapters will be able to
communicate with any computer on the network (either Ethernet or VLAN) where they are
included and have no direct access to the computers joined to other networks.
The process of creating new Virtual Networks and joining physical and VLAN adapters to these
Virtual Network is described in the Creating a Virtual Network (p. 139) and Connecting an
Adapter to a Virtual Network (p. 137) subsections, respectively. So, in the example below we
assu
me the following:
 The eth0 physical adapter and the vznetwork1 Virtual Network exist on the server.
 The eth0 physical adapter is connected to the local Ethernet network and to the
vznetwork1 Virtual Network.
 You want to connect Container 101 and Container 102 to the local Ethernet network.
To join Container 101 and 102 to the local Ethernet network behind the eth0 adapter, you
should connect these Containers to the vznetwork1 Virtual Network. This can be done as
follows:
1 Find out the name of the veth Ethernet interfaces inside Container 101 and 102:
# vzlist -a -o ctid,ifname
CTID IFNAME
101 eth1
102 eth0
103 -
The command output shows that the veth Ethernet interfaces inside Container 101 and 102
have the names of eth1 and eth0, respectively.
Note: To add a veth adapter to a Virtual Network, you must use the name of its Ethernet
interface inside the Container.
2 Join the veth adapters to the vznetwork1 Virtual Network:
 Add the veth adapter of Container 101 to the Virtual Network:
# pctl set 101 --ifname eth1 --network vznetwork1 --save
Saved parameters for Container 101
 Add the veth adapter of Container 102 to the Virtual Network:
# pctl set 102 --ifname eth0 --network vznetwork1 --save