On Thu, Nov 12, 2009 at 04:49:47PM -0800, Jim Cole wrote:
> 
> Hi - I am running into problems utilizing two NICs in an iSCSI setup
> for multipath IO. The setup involves a Linux server (Ubuntu 9.10
> Server) with two Broadcom NetXtreme II GbE NICs connected to two
> separate switches on a single subnet, which is dedicated to EqualLogic
> SAN access.
> 

Here's what I did when I tested multiple interfaces with Equallogic:
http://pasik.reaktio.net/open-iscsi-multiple-ifaces-test.txt

-- Pasi

> I have setup two iface definitions using the following steps.
> 
>   - iscsiadm -m iface -I eth4 --op=new
>   - iscsiadm -m iface -I eth5 --op=new
>   - iscsiadm -m iface -I eth4 --op=update -n iface.net_ifacename -v
> eth4
>   - iscsiadm -m iface -I eth5 --op=update -n iface.net_ifacename -v
> eth5
> 
> I have also tried specifying the MAC addresses explicitly with no
> change in behavior.
> 
> Discovery was performed with the following command and worked as
> expected, generating node entries for both interfaces.
> 
> - iscsiadm -m discovery -t st -p xx.xx.xx.xx:3260 -I eth4 -I eth5
> 
> Up to this point everything looks good. And I have no trouble logging
> one interface into the desired target. However attempts to login the
> second interface always result in a time out. The message is
> 
>   iscsiadm: Could not login to [iface: eth4, target: <target>, portal:
> xx.xx.xx.xx,3260]:
>   iscsiadm: initiator reported error (8 - connection timed out)
> 
> The problem is not specific to one interface. I am able to login with
> either one. I just can't seem to login with both at the same time.
> 
> I am using the open-iscsi package that ships with the Ubuntu distro
> (open-iscsi 2.0.870.1-0ubuntu12).
> 
> I have another server on the same network, with identical hardware and
> iSCSI configuration, that is working properly. The only difference is
> that the other server is running CentOS 5.4 and using the initiator
> that ships with that distro (iscsi-initiator-utils
> 6.2.0.871-0.10.el5).
> 
> If anyone could provide any guidance on how to further diagnose, and
> hopefully solve, this problem, it would be greatly appreciated.
> 
> TIA
> 
> Jim
> 
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