Don,

That is not necessarily true.  If rp_filter is set to 2 for each network 
device on the same subnet, they can all be active at the same time. This is 
even addressed in the open-iscsi documentation.

Mike E.

On Saturday, June 17, 2017 at 7:59:40 PM UTC-5, Donald Williams wrote:
>
> Hello, 
>    I read over that thread.  Once thing missing from that discussion is 
> how Linux routing works with multiple NICs on the same subnet.  If you have 
> two NICs IP'd on same IP subnet, only one NIC will be active.  That becomes 
> the default NIC for that subnet.  Down that interface and the other will 
> become active.  That's the default behavior.  That's why the -I interface 
> option or creating interfaces files  is needed, not just for offload 
> cards.  On iSCSI SANs like the Equallogic where all interfaces are on the 
> same subnet, the iSCSI initiator must initiate iSCSI connections from each 
> interface desired for iSCSI traffic.  iSCSI SANs like the MD and CML can 
> use different network subnets to get around how Linux networking works. 
>
> Don 
>
>
>  
>
> On Fri, Jun 16, 2017 at 4:04 PM, <mike....@gmail.com <javascript:>> wrote:
>
>> I have been facing an issue with kubernetes implementation here is the 
>> link if you care to look:
>>
>>
>> https://github.com/kubernetes/kubernetes/issues/46041#issuecomment-308762723
>>
>> The question I have is why does open-iscsi behave differently when you 
>> use the default interface in the first place? 
>>
>> That is why does the behavior of these things differ:
>>
>> iscsiadm -m discovery -t st -p X.X.X.X
>> vs
>> iscsiadm -m discovery -t st -p X.X.X.X -I default
>>
>> and 
>>
>> iscsiadm -m node -p XXXX -T 
>> iqn.2001-05.com.equallogic:X-XXXXXX-XXXXXXXXX-XXXXXXXXXXXXXXXX-kubetesting 
>> --login
>> vs
>> iscsiadm -m node -p XXXX -T 
>> iqn.2001-05.com.equallogic:X-XXXXXX-XXXXXXXXX-XXXXXXXXXXXXXXXX-kubetesting 
>> -I default --login
>>
>> Thanks,
>>
>> Mike E
>>
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