Layer 2 is a broadcast Media Access Control (MAC) MAC level network, while Layer 3 is a segmented routing over internet protocol (IP) network.
MOI’s default installation is that layer 2 networking is turned off as documented in the linux.prm file from the MLSS ISPF installation panels:
Sample MOI IPL messages that indicated that there was a network layer issue:
[ 4.211139] qeth 0.0.0f00: The qeth device is not configured for the OSI layer required by z/VM
[ 55.208982] anaconda: 7) [ ] Network configuration 8) [x] Shell
[ 55.209046] anaconda: (No network devices available) (Start s
During the operating system IPL, the following error message was observed:
[ 10.562427] qeth 0.0.0f00: The qeth device is not configured for the OSI layer required by z/VM
Release : 2.0
Component : MF OPERATIONAL INTELLIGENCE
If your company is making use of layer 2 networking in its switches, you will need to make the following manual change to the layer2 parm in the linux.prm file in the MLSS ISPF panels via Install panel option 7.2 (Edit parmfile)
Change the default setting layer2=0 to layer2=1
Run the Deploy step for properties files via MLSS ISPF Install panel 8.1.
Then run the MLSS Prepare job via Install panel option 9 before transferring the operating ISO file to your MOI appliance and rebooting to install the operating system.
Sample log messages that indicate that the change to turn on layer 2 worked is as follows:
[ 19.514274] anaconda: 7) [x] Network configuration 8) [x] Shell
[ 19.514350] anaconda: (Wired (enccw0.0.0f00) (Start s
Confirmation messages that the network is functional.
Also later during the IPL of the Linux system these statements about the network interface were displayed:
[ 0.552180] netif_napi_add() called with weight 128 on device eth%d
[ 0.552279] qeth 0.0.0f00: Device is a Virtual NIC QDIO card (level: V713)
[ 0.552279] with link type Virt.NIC QDIO (portname: )
[ 0.552323] qeth 0.0.0f00: Hardware IP fragmentation not supported on eth0
[ 0.552325] qeth 0.0.0f00: Inbound source MAC-address not supported on eth0
[ 0.552335] qeth 0.0.0f00: VLAN enabled
[ 0.552345] qeth 0.0.0f00: Multicast enabled
[ 0.552388] qeth 0.0.0f00: IPV6 enabled
[ 0.552411] qeth 0.0.0f00: Broadcast enabled
[ 0.552426] qeth 0.0.0f00: Outbound TSO not supported on eth0
Please contact MOI Support if you need further information.