2.4 Defining networks (LAN) (for blade servers only)
A key attribute of a "single" network is that it is VLAN transparent. You can therefore channel several external networks with different VLAN tags (or also without VLAN tags) through a "single" network.
Packets with or even without a VLAN tag, which arrive at the uplink ports from outside the network, are channeled to the related server blades with the corresponding network. The same applies to the network packets that come from the server blades.
In the figure, (1) and (2) illustrate "single" networks.
Virtual networks with VLAN IDs
Depending on the IBP module, you have 6 to 12 uplink ports available. You can define as many different networks as there are uplink ports. If networks are to be created with backup ports or with a link aggregation group, then the number of possible networks on an IBP module is automatically reduced.
You can get around this restriction regarding the uplinks that are physically available by defining virtual networks (Virtual Local Area Network - VLAN).
By setting up virtual networks, which can be identified by unique numbers known as VLAN IDs, you can set up several logical networks that are com- pletely separate from each other from a technical and network perspective. These networks share an uplink set ("shared uplink set") without the server blades of one virtual network being able to communicate with server blades of the other virtual networks.
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