[openib-general] 2.6.12 Kernel OpenIB support

[Hal Rosenstock]

On Wed, 2005-07-13 at 10:21, William Jordan wrote:
> On 7/13/05, Talal jaafar <talal.jaafar at gmail.com> wrote:
> > Thanks for the help, I was able to load the infiniband drivers using
> > your suggestion. However, I am still stuck at one point. I do not
> > understand why is it happening but here what I am getting when I try
> > to run "service network restart"
> > 
> >  ------------------------------------------------------------------
> > Shutting down interface eth0:      [OK]
> > Shutting down interface ib0:       [OK]
> > Shutting down interface ib1:       [OK]
> > Shutting down loopback interface:  [OK]
> > Setting network parameters:        [OK]
> > Bringing up loopback interface:    [OK]
> > Bringing up interface eth0:        [OK]
> > Bringing up interface ib0:  Error, some other host already uses
> > address 20.1.1.10.
> > Bringing up interface ib1:  Error, some other host already uses
> > address 20.1.1.11.
> > -------------------------------------------------------------------
> > 
> > 
> > I am 100% sure that no other host is already using the same address,
> > and here is how I am setting the ib interfaces:
> > 
> > The output of /etc/sysconfig/network-scripts/ifcgf-ib0 :
> > ---------------------------------------------
> > DEVICE=ib0
> > BOOTPROTO=static
> > ONBOOT=yes
> > IPADDR=20.1.1.10
> > NETMASK=255.0.0.0
> > ---------------------------------------------
> > 
> > and the output of /etc/sysconfig/network-scripts/ifcgf-ib1 :
> > ---------------------------------------------
> > DEVICE=ib1
> > BOOTPROTO=static
> > ONBOOT=yes
> > IPADDR=20.1.1.11
> > NETMASK=255.0.0.0
> > --------------------------------------------
> > 
> > 
> > Had anybody run into this problem??
> > 
> > 
> > Regards,
> > 
> >  Talal
> 
> Yes, I see the same problem with ifup. It is an issue with arping
> which thinks that it has seen -1 responses to the IP address. I
> haven't looked to see if there is a fixed version of  arping which
> works with IPoIB (anyone know?).
> 
> You can get the the interface up by just specifying "ifconfig ib0 20.1.1.10".

I think arping needs a number of changes. Aside from handling IB
hardware addresses (in addition to MAC addresses), I think it relies on
link level support from userspace (sending a broadcast). There was a
thread on this back in early March entitled "arping" failing over ipoib.

-- Hal