xen discuss - Sep 2009 - Does IPMP work in 2009.06?

I want to bond together both interfaces on my dom0 using IPMP to provide a
redundant path.  Is this supported? - I''ve done a google and found no
specific mention of doing exactly this so I''d like to know if it is
possible before I attempt it.


Many thanks,

Matt.
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This message posted from opensolaris.org

On 7 Sep 2009, at 11:09pm, Matt wrote:
> I want to bond together both interfaces on my dom0 using IPMP to  
> provide a redundant path.  Is this supported?
Yes.

Your terminology is somewhat mixed, though. ''Bond'' usually
refers to
802.3ad link aggregation, where multiple ethernet links are bonded  
together to look like one link. This requires support (and  
configuration) on the switch to which your machine is connected. It''s  
a layer 2 technology. In Solaris you''d do this with
''dladm'' and the
result would be a new datalink interface called (say) aggr0. You''d  
then specify aggr0 as the ''bridge'' device to be used by your
guest
domains.

IPMP is a Solaris specific approach which allows IP to use multiple  
network interfaces in groups. In current OpenSolaris this ends up  
looking quite a bit like link aggregation (there''s an ipmp0 (say) IP  
interface created to represent the group), but it''s purely a layer 3  
construct. You cannot use the resulting IP interfaces as the
''bridge''
device for guest domains. You can have dom0 use IPMP groups for its''  
own traffic and guest domains can continue to use the underlying  
physical devices.

Thanks, David.

I''ve misunderstood IPMP.  I was looking for something that would give
me network redundancy for both the dom0 and domUs.

Increased bandwidth throughout would be nice, but is secondary to redundancy, so
I think 802.3ad is what I actually want.  I have a server which will be running
2009.06 and will be a hassle to get to and fix should I lose an interface, hence
the question.  I''m fairly sure the network equipment it is connected to
will support 802.3ad link aggregation, but I will check.


Many thanks,

M.
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This message posted from opensolaris.org