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On Wed, Aug 11, 2004 at 09:39:16AM -0400, Joseph Mack wrote:
> Sean Rolinson wrote:
> >
> > Hello Group,
> >
> > I've setup LVS/DR on RH 3.0 ES. Everything with regards to LVS is
> > working fine and has been for sometime. However, we ran in to some
> > problems today deploying a package called Spread
> > (http://www.spread.org).
>
> can you turn on line wrap? Your paragraphs are one line and go off the
> edge of the screeen.
>
> > Is it ok to not to have a broadcast entry in for lo:0? Does LVS
> > need to have a broadcast set for it to work properly?
>
> The /32 broadcast for the VIP depends on the kernel version and the
> forwarding method and is explained in the HOWTO at least for 2.0 and
> 2.2 kernels. Why you need a /32 netmask for the VIP under some
> circumstances is beyond me although Horms appears to understand it.
>
> Clearly if your LVS works, then it's OK.
My ears are burning.
In general you should use a /32 on the lo:0 netmask.
If it is working for you, problem solved.
The real story is that the netmask works a little differently
on lo to other interfaces. On lo the interface will answer to
_all_ addresses covered by the netmask. This is how 127.0.0.1/8 on
lo ends up answering 127.0.0.0-127.255.255.255. So if
you add 172.16.4.222/16 to eth0 then it will answer 172.16.4.222 and
only 172.16.4.222. But if you add the same thing to lo then it
will answer 172.16.0.0-172.16.255.255. So you need to use
172.16.4.222/32 instead.
--
Horms
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