Why does the NIC fail to come up on boot in RHEL5 for s390x?

Solution Verified - Updated -

Issue

  • The server has two OSA-Express cards, both using the qeth device driver modules
  • On boot, the network interface "eth0" comes up while "eth1" fails, in spite of having the directive ONBOOT=yes:
# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# IBM QETH
DEVICE=eth0
BOOTPROTO=none
HWADDR=00:06:29:FB:5F:F1
IPADDR=9.12.20.136
NETMASK=255.255.255.0
ONBOOT=yes
NETTYPE=qeth
SUBCHANNELS=0.0.09a0,0.0.09a1,0.0.09a2
TYPE=Ethernet

# cat /etc/sysconfig/network-scripts/ifcfg-eth1
# IBM QETH
DEVICE=eth1
BOOTPROTO=none
HWADDR=00:06:29:FB:5F:F2
IPADDR=192.168.20.136
NETMASK=255.255.255.0
ONBOOT=yes
NETTYPE=qeth
SUBCHANNELS="0.0.09a4,0.0.09a5,0.0.09a6"
TYPE=Ethernet
  • The interface has to be manually activated and brought up

Environment

  • Red Hat Enterprise Linux 5 for IBM System z(s390x)
  • OSA-Express card
  • qeth S/390 OSA-Express network driver

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