Architecture and strategies Networks
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2.3 Networks
The Net Unit supplies the central link of all the SE server's IP network connections. It
concentrates the network connections of the various Server Units to the outside into the
customer network (public networks) and, internally, establishes the network connections
between the various Server Units (private networks).
The hardware of the Net Unit is supplied preconfigured. All the cable connections to the
Server Units are implemented professionally in the cabinet in the factory. Connections to
the customer networks (data networks, management networks) only need to be established
to the reserved connection ports of the Net Unit (uplinks). In terms of the software the Net
Unit is fully installed and immediately ready to operate.
Up to two uplinks are possible per public network to provide the connection to the
customer's LAN structure. The uplinks are provided without vendor dependencies and can
be connected to any switch (managed or unmanaged). The uplinks are operated without a
VLAN ID (i.e. untagged), and no switch protocol (e.g. spanning tree) is used.
Only the relevant configuration measures need to be implemented in the operating systems
to use the networks. It is not necessary to involve network administrators of the customer
network.
Private networks have been configured for the Sever Units to communicate with each other.
These separate the network communication within the SEs totally from the customer
network. The private networks are protected from each other and can be configured flexibly
according to customer requirements. Network security is automatically enhanced because
of this protection and the flexibility to configure and operate private networks independently
of the customer infrastructure.
The private networks can be operated with high performance, do not influence the customer
network, and cannot be influenced by it (e.g. they continue to function even when the
customer infrastructure fails).
The Net Unit can be designed with redundancy in the interest of protection against failure.
By default, SE700 and SE500 incorporate a redundant Net Unit. Redundancy can be
ordered as an option for SE300.
The BS2000 systems communicate with the MU over a private network, see section
“Integration of BS2000 into the SE Manager” on page 36.
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