Before you can set the network interfaces for server complexes,
you must set up the connection properties for guest LANs, OSAs, or VSWITCHes
in the z/VM. These will be used to route the Linux guest systems.
After you have set these connection properties, you can configure
the network interfaces for a server complex.
Complete the following
steps to set
the connection properties:
- If it is not started already, start the Server Complexes
task for the z/VM system you want to work with.
- Click Action → z/VM Networking Properties to open
the z/VM Networking Properties window.
- If this is the first time you are using the Server Complexes task
for this z/VM, all the fields will be empty. Click Action → Refresh
from z/VM to see the existing connections (LANs, OSAs, and VSWITCHes).
- In the z/VM Networking Properties window, select the LAN, OSA,
or VSWITCH tab.
- Select the connection whose properties you want to edit and click Edit → Edit
Properties to open the Connection Properties window.

- In the IP Address Range field, type the number of IP
addresses that can be taken up by the network, starting from the Base IP address,
when assigning an IP address to a Linux guest system configured
on this connection.
- In the MTU field, type an integer for the maximum transmission
unit. In cases of a guest LAN, this must not be larger than the Maximal
frame size shown in the z/VM information on the upper part of the Connection
Properties window.
- In the Base IP Address field, type the lowest IP address
that can be used when assigning an IP address to a Linux guest system configured
on this guest network.
- In the Netmask field, type the subnet mask that will
be used for the Linux routing.
- (Optional) In the Default gateway field, type the default
gateway for the connection. This step is optional because you can also type
the default gateway in the Server Complex Properties window.
- Click OK to update the connection properties and close
the Connection Properties window.
- In the z/VM Networking Properties window, click Action → Save .
Note: You can also double-click a line in the z/VM Networking Properties
table to open the Connection Properties window for that connection.