Setting up the service machine

SUSE Linux Enterprise Server 15 SP4 z/VM guest

Setting up the service machine entails editing the PROFILE TCPIP file of the service machine.

Procedure

Proceed like this to set up the service machine:

  1. For each guest that is to have an IUCV connection to the service machine add a home entry, device, link, and start statement to the service machine's PROFILE TCPIP file.
    The statements have the form:
       Home
       	<ip_address1>	<link_name1>
       	<ip_address2>	<link_name2>
        ...
    
       Device <device_name1> IUCV 0 0 <guest_ID1> A
       Link <link_name1> IUCV 0  <device_name1>
    
       Device <device_name2> IUCV 0 0 <guest_ID2> A
       Link <link_name2> IUCV 0  <device_name2>
    
       ...
    
       Start <device_name1>
       Start <device_name2>
       ...
    where
    <ip_address1>, <ip_address2>
    are the IP address the Linux® instances.
    <link_name1>, <link_name2>, ...
    are variables that associate the link statements with the respective home statements.
    <device_name1>, <device_name2>, ...
    are variables that associate the device statements with the respective link statements and start commands.
    <guest_ID1>, <guest_ID1>, ...
    identify the z/VM® guest virtual machines on which the connected Linux instances run.
    In our example, the PROFILE TCPIP entries for our example might look of this form:
       Home
       	1.2.3.4 LNK1
       	1.2.3.5 LNK2
        
       Device DEV1 IUCV 0 0 LNX1 A
       Link LNK1 IUCV 0  DEV1
    
       Device DEV2 IUCV 0 0 LNX2 A
       Link LNK2 IUCV 0  DEV2
    
       Start DEV1
       Start DEV2
       ...
  2. Add the necessary z/VM TCP/IP routing statements (BsdRoutingParms or Gateway). Use an MTU size of 9216 and a point-to-point host route (subnet mask 255.255.255.255). If you use dynamic routing, but do not wish to run routed or gated on Linux, update the z/VM ETC GATEWAYS file to include permanent host entries for each Linux instance.
  3. Bring these updates online by using OBEYFILE or by recycling TCPIP and/or ROUTED as needed.