Tell me which log you want, and I’ll get it to you. I can always use nictagadm 
to regenerate the error if you like.

Yes, I’m certainly willing to try out a new driver to fix the error. I’m trying 
to set up a point-to-point connection between two computers across the 10Gbe 
connection, but the 1 gigabit connection is still present and is what I’m using 
until I can get the 10Gbe connection up. So, as long as I don’t do anything 
irreparable to my system, I have no problem testing stuff out to get this fixed.

Thanks,
John

On Jul 5, 2014, at 5:42 PM, Robert Mustacchi <[email protected]> wrote:

> On 7/5/14 16:02 , John Croix via smartos-discuss wrote:
>> Hi Robert,
>> 
>> I tried what you suggested, but when I rebooted, the network services went 
>> into maintenance mode. Here’s the /usbkey/config file that I had in place 
>> before attempting nictagadm.
>> [root@68-05-ca-0a-2f-c5 ~]# cat /usbkey/config 
>> #
>> # This file was auto-generated and must be source-able by bash.
>> #
>> 
>> # admin_nic is the nic admin_ip will be connected to for headnode zones.
>> admin_nic=68:5:ca:a:2f:c5
>> admin_ip=dhcp
>> admin_netmask=
>> admin_network=...
>> admin_gateway=dhcp
>> 
>> myricom_nic=0:60:dd:45:73:22
>> myricom_ip=192.168.2.2
>> myricom_netmask=255.255.255.0
>> 
>> headnode_default_gateway=
>> 
>> dns_resolvers=8.8.8.8,8.8.4.4
>> dns_domain=
>> 
>> ntp_hosts=192.168.1.1
>> compute_node_ntp_hosts=dhcp
>> 
>> I issued the command “nictagadm update -p mtu=9000 myricom” which put the 
>> line “myricom_mtu=9000” into that file. Upon reboot is when it went into 
>> maintenance mode for network services. I had to remove that line from the 
>> console and reboot, at which point it booted up normally.
> 
> Hi John,
> 
> Do you happen to have the output of the service log available so we can
> understand why that failed?
> 
> I took a look at the driver and from the source code, it looks like the
> default is controlled based on the presence of MYRICOM_PRIV
> (http://src.illumos.org/source/xref/illumos-gate/usr/src/uts/common/io/myri10ge/drv/myri10ge.c#194).
> Because that's not there, we're probably setting the MTU to 1500.
> 
> Actually, looking further at the source code, it appears that the reason
> that the nictagadm commands failed is because that driver doesn't
> support having Any of its properties changed at all, so it doesn't
> support changing the MTU at all. In this case, I guess we can figure out
> how to change the default to make it match expectations, though it's
> rather unfortunate that the driver doesn't support changing its MTU at all.
> 
> Though, from looking at the source code it doesn't appear to be too hard
> to allow it to be changed before the device is started (eg. vnics are
> created over it or IP interfaces). Would you be willing to help test a
> driver that had this ability?
> 
> Robert




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