Hirschmann RS20 User Manual page 165

Network Load Control
Example 2
Figure 45: Example of a more complex VLAN constellation
The second example shows a more complex constellation with 3 VLANs
(1 to 3). Along with the Switch from example 1, a second Switch (on the
right in the example) is now used.
The terminal devices of the individual VLANs (A to H) are spread over two
transmission devices (Switches). Such VLANs are therefore known as
distributed VLANs. An optional Management Station is also shown, which
enables access to all network components if it is configured correctly.
Note: In this case, VLAN 1 has no significance for the terminal device
communication, but it is required to maintain the administration of the
transmission devices via what is known as the Management VLAN.
As in the previous example, uniquely assign the ports with their connected
terminal devices to a VLAN. With the direct connection between the two
transmission devices (uplink), the ports transport packets for both VLANs.
To differentiate these, "VLAN tagging" is used, which prepares the
packets accordingly
the respective VLAN assignments.
Proceed as follows to perform the example configuration:
Add Uplink Port 5 to the ingress and egress tables from example 1.
Create new ingress and egress tables for the right switch, as described in
the first example.
The egress table specifies to which VLAN the frames sent from this port
are assigned. Your entry also defines whether Ethernet frames sent from
this port are to be tagged:
Basic Configuration
Release 6.0 07/2010
(see on page 142 "VLAN
8.6 VLANs
tagging"). This maintains
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