Server automation topologies (111 Views)
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Damian Lukowski
Posts: 1
Registered: ‎10-28-2010
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Server automation topologies

Good day everyone,

I wonder if someone could help me understanding some issues with Server
Automation satellites.
1) The SA 9.0 Overview and Architecture Guide describes a topology with
cascading satellite links, where a satellite facility's gateway is
connected to another satellite gateway and not to a Core Management
Gateway. This contradicts the statement in the "SA 9.0 Simple/Advanced
Installation Guide", saying that a "Satellite installation must be linked
to at least one core, which can be either a Single Core or part of a
Multimaster Mesh", doesn't it?

2) The second question is kind of related to the first one.
I would like to know, how and in which order the gateway
connections are initialized. For what I think to know now is the following:
a) There is a core facility installation with a management gateway X
b) A new satellite facility is constructed, and X is given as the uplink
for its satellite gateway Y. Assume, that there is a firewall between
the new facility and the core. A connection is established by the
satellite gateway towards X, so the firewall must allow outgoing TCP
connection establishment towards X and the specific port.
This tunnel connection is persistent, so it remains established even if
there are no pending management tasks. It is the only connection needed
for interaction between managed servers and the core, so no other
firewall exception rules are needed.

3) Assume an inner network within the satellite facility, which is again
protected by a second firewall from the outer servers in the satellite
facility. Is it possible to use the cascading link feature here? I think of
creating a new satellite facility within the outer one, and specify Y as
the uplink for the inner satellite gateway Z. A connection is established
by the gateway Z towards Y, so the firewall must allow outgoing TCP
connection establishment towards Y and the specific port. This tunnel
connection is persistent and is the only connection needed for interaction
between managed servers in the inner facility and the core, so neither the
inner nor the outer firewall needs additional rules.

4) The "SA 9.0 Overview and Architecture Guide" states that "Realms are
interconnected by gateways in what can be described as a gateway mesh"
What kind of gateways are these? Satellite gateways? How are realms
related to cascading satellite links in 3)?

Best regards
Damian
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