Solved

Intermitten "No network connection"

Posted on 2010-11-29
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Last Modified: 2013-12-05
Over the past two months I've migrated two NetWare servers 6.5 SP7 to SLES10 SP3 and OES2 SP2. I've had some consulting assistance and been learning linux as I go. Now I have a problem migrating to a Dell PE SC 1430 with integrated Broadcom BCM 5751 GB Ethernet working ok, but then after a reboot it will come up with no networking.   I've migrated two volumes 350GB using miggui, so it has been working, but again today, no network.   I've used Network Manager to configure a static IP but it willsometimes come up and ifconfig will show no ip assigned. I can manually assigned ip, netmask, gw and can ping the gw, but can't ping any host on the subnet. I disabled the integrated NIC and installed another, but same problem. Could someone direct me to a more in-depth troubleshooting guide for this? I've spent prolly 3 hours and maybe it's staring me in the face, but I'm reaching out for some help, thank you.
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Question by:facutvivo
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Expert Comment

by:sweetfa2
ID: 34235409
what does the output of

dmesg | grep eth0

give you?
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Author Comment

by:facutvivo
ID: 34242688
Using DHCP I get a network connection:

auburn-two:/etc/init.d # dmesg | grep eth0
eth0: Tigon3 [partno(BCM95751) rev 4201] (PCI Express) MAC address 00:1a:a0:d3:bc:19
eth0: attached PHY is 5750 (10/100/1000Base-T Ethernet) (WireSpeed[1])
eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
eth0: dma_rwctrl[76180000] dma_mask[64-bit]
eth0 renamed to eth1
auburn-two:/etc/init.d

tg3: eth1: Link is up at 1000 Mbps, full duplex.
tg3: eth1: Flow control is on for TX and on for RX.
tg3: eth1: Link is up at 1000 Mbps, full duplex.
tg3: eth1: Flow control is on for TX and on for RX.


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Author Comment

by:facutvivo
ID: 34243230
changing to static, then reboot, this time it came up with network connection, and output of dmesg is same

After next reboot, no network connection and output is "eth0 renamed to eth1"

I can switch to DHCP, run dhclient and address is bound ok.

so problem is when setting STATIC IP.  DHCP works ok


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LVL 17

Expert Comment

by:sweetfa2
ID: 34243647
Is your static unique and in the same subnet?

Are you using yast to configure?

What are the contents of /etc/sysconfig/network/ifcfg-eth*

Have you configured your eth1 device?

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Author Comment

by:facutvivo
ID: 34243930
yes, static unique 192.168.2.7
using YaST
auburn-two:/etc/sysconfig/network # cat ifcfg-eth-bus-pci-0000\:01\:00.0
BOOTPROTO='static'
BROADCAST=''
ETHTOOL_OPTIONS=''
IPADDR='192.168.2.7/24'
MTU=''
NAME='Broadcom NetXtreme BCM5751 Gigabit Ethernet PCI Express'
NETMASK=''
NETWORK=''
REMOTE_IPADDR=''
STARTMODE='auto'
UNIQUE='VCu0.slfAbsXzcHD'
USERCONTROL='no'
_nm_name='bus-pci-0000:01:00.0'

I configured eth1 in Yast/Network Card

I will try another static IP, and if any other logs I can check let me know.
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Accepted Solution

by:
facutvivo earned 0 total points
ID: 34253225
fixed by choosing different Network Setup Method Traditional Method with ifup in stead of User Controlled with NetworkManager

thanks for the help
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Author Closing Comment

by:facutvivo
ID: 34281170
solved by self
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