[clue] networking Q?

Mike Bean beandaemon at gmail.com
Tue Jul 5 13:25:06 MDT 2016


OK, I'm running low on my bag of tricks,  as is my custom when I get
desperate, I consult the council!

I have a series of seven DL380's using 10GB 2 port NICs which are HP 560
SFP adapters.  Using the same configuration on each host, I've been able to
get network on six of them, using CentOS 6.7; config files follow

As near as I can tell, the only difference between the one without network,
and the 6 that do, is the six that do have two of the 10GB nics, and the
one without, has one.  (2 ports to each NIC)

Ethtool shows no link, ip link show, shows BROADCAST, MULTICAST, UP,  state
unknown.

(scratches head)   If I'm missing something, I sure don't know what it is.
Got my networking guy to show me a copy of the switch port config, it's
identical for all ports.  My onsite guy assures me it's plugged in and
they've got link light on the cable.

If I'm missing something, it sure isn't jumping out at me.  So all advice
is appreciated.
Is there a way to tell definitively which ethernet I need configure?  In
case maybe it's not eth0?   Unlikely - since the other six came up fine
when I configured eth0, but I'm running low on ideas.

Mike B

(etc/hosts)
127.0.0.1   localhost localhost.localdomain localhost4
localhost4.localdomain4
::1         localhost localhost.localdomain localhost6
localhost6.localdomain6
127.0.1.1 (HOSTNAME)

(/etc/resolv.conf)
search DOMAIN1 DOMAIN2 nameserver DNS1 nameserver DNS2

(/etc/sysconfig/network)
NETWORKING=yes
GATEWAY= (GATEWAY)
HOSTNAME= (HOSTNAME)
IPV6FORWARDING=yes
IPV6_AUTOCONF=no
IPV6_AUTOTUNNEL=no
IPV6_DEFAULTDEV=eth0
NETWORKING_IPV6=yes

(/etc/sysconfig/network-scripts/ifcfg-eth0)

DEVICE=eth0 HWADDR= (SOMEADDR) TYPE=Ethernet UUID= (SOMEUUID) ONBOOT=yes
NM_CONTROLLED=yes BOOTPROTO=static GATEWAY= (GATEWAY) IPADDR=(IPADDR)
NETMASK=255.255.255.0 DNS1= (DNS1) DNS2=(DNS2) DOMAIN=(DOMAIN) PEERDNS=no
USERCTL=no
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