Lewis Thompson wrote:
> Hi,
>
> I have a customer who has a basic IPMP config in his global zone:
>
> vnet0 & vnet1 [currently vnet0 has the 'floating' IP]
>
> In addition he has a zone with ip-type=shared where physical=vnet1
>
> When the zone boots the zone interface gets created on vnet0 instead of
> vnet1
>
> I have verified this behaviour on a test system and can confirm that the
> zone interface acts in the same way as the floating IP. i.e. if I run
> 'if_mpadm -d vnet0', then the zone's IP fails over to vnet1
>
> Unfortunately I can't find any documentation that discusses this
> behaviour. Is anybody aware of any documents that explain what we are
> seeing?
I haven't found any explicit documentation on this topic. But the
association, whether you use vnet0 or vnet1, is with the IPMP group.
Thus specifying physical=vnet1 clearly doesn't constrain the IP address
to always live on vnet1; it moves when there is a failure.
Whether its initial placement, even when vnet1 is not failed, is on
vnet0 or vnet1 is an implementation matter.
Does the initial placement on something different than vnet1 cause a
problem? Or is it just confusing?
FWIW Once Clearview IPMP integrates this will become more clear since
we'll have the IP addresses on an ipmp interface - the failure handling
and load spreading will be transparent to the user.
Erik
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