Re: Network bond - one port goes down from time to time

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Am 28.03.16 um 12:12 schrieb Leon Fauster:
> Am 28.03.2016 um 11:27 schrieb Götz Reinicke <goetz.reinicke@xxxxxxxxxxxxxxx>:
>> We have three supermicron servers with two 10Gb Ports each, connected to a cisco switch stack 1Gb ports. All are on auto speed.
>>
>> I configured a LACP bond on both sides on all servers, first with citrix xen server. 
>>
>> On one server eth0 goes down from time to time … maybe within minutes, someday it is up for some hours.
>>
>> Two server are fine; the bond is up for 24 days(!) now without any problem.
>>
>> Recently I installed centos 7.2 on that server in question and - bam - eth0 is going down from time to time …
>>
>> I checked patch cables, tried an other switch port channel, reconfigured the ports, reinstalled the os. Same behavior.
>>
>> And: We got a replacement server. Same behavior …. :)
>>
>> Currently the cisco tech guys don’t see a problem on the switch (which is up for 3 Years now with 10+ servers connected … no problem so far), from the citrix side I don’t get much more hints.
>>
>> In the logs i just have a Nic Link is Down … Nic Link is Up. It is always eth0.
>>
>> Question:
>>
>> Any idea ? One suggestion was Disable all power saving features in the server bios. Did not do that yet.
>>
>> Is there any chance to set some sort of higher debug level for that nic/kernel/whatever to get some server os side feedback why the port goes down?
> 
> 
> How is your interface exactly configured ? 


TYPE=Bond   #Interface type set to bond
BOOTPROTO=static
BONDING_MASTER=yes
BONDING_OPTS="mode=4"  #i set mode to active-backup
DEFROUTE=yes
IPADDR="192.168.xxx.xxx"
NETMASK=255.255.255.0
GATEWAY="192.168.xxx.xxx"
IPV4_FAILURE_FATAL=no
IPV6INIT=no
NAME=bond0
DEVICE=bond0
ONBOOT=yes


TYPE="Ethernet"
MASTER=bond0
SLAVE=yes
NAME="enp4s0f0"
UUID="xxx"
DEVICE="enp4s0f0"
ONBOOT="yes"

TYPE="Ethernet"
MASTER=bond0
SLAVE=yes
NAME="enp4s0f0"
UUID="xxx"
DEVICE="enp4s0f1"
ONBOOT="yes"


	/Götz



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