Ah, I see.  The VLANs are only private in the sense that we control which 
devices are attached to them.  They are routed VLANs.  (i.e.  I did utadm -A to 
add the networks)

We don't span VLANs across switches.  Our network is large, and the convergence 
in the case of a core switch failure would severely impact our availability and 
performance.  The Sun Ray servers are physically remote from the client side, 
so we use DHCP forwarding on the client switches to private VLANs on the 
servers.

Everything is redundant and the FOG functions flawlessly.  We've done disaster 
recovery testing using this configuration, and everything works exactly as 
expected.

-Bill
________________________________________
From: [EMAIL PROTECTED] [EMAIL PROTECTED] On Behalf Of Kent Peacock [EMAIL 
PROTECTED]
Sent: Monday, May 12, 2008 7:12 PM
To: SunRay-Users mailing list
Subject: Re: [SunRay-Users] Trying to get a FOG going over 2 sites.

Quayle, Bill wrote:
> I use this (unsupported) configuration with no problem at all by configuring 
> PIM sparse on the switches at each site. (See 
> http://en.wikipedia.org/wiki/Sparse_multicast)
>
>
> I setup a multicast IP in /etc/opt/SUNWut/auth.props, as such:
>
> # Enable Multicast
> #       Flag to enable/disable use of multicast in group manager.
> #       If disabled, group manager will use broadcast.
> enableMulticast = true
>
> # Multicast Address
> #       Multicast group address used by group manager.
> #       If multicast is enabled, every interface joins this multicast group.
> multicastAddress = 239.xx.x.x
>
> # Multicast Time-to-Live
> #       Time-to-live parameter for forwarding multicast packets.
> #       If set above one, keepalive messages can pass through routers.
> multicastTTL = 10
>
> Make sure the mulicastAddress you define is the same on all of your servers, 
> and that the group signature has been set properly.

Did you use private interconnects, or were your Sun Rays on routable
segments of your network? It's the routed *private interconnect*
scenario that is not supported. Multicast is the least of the problems
in that particular case.

Kent
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