Hirschmann RS20 User Manual page 151

Network Load Control
The egress table specifies at which ports the Switch may send the frames
from this VLAN. Your entry also defines whether the Switch marks (tags)
the Ethernet frames sent from this port.

T = with tag field (T = tagged, marked)

U = without tag field (U = untagged, not marked)
In this example, the devices use tagged frames in the communication
between the transmission devices (uplink), the ports differentiate the
frames for different VLANs.
Terminal Port Port VLAN
identifier (PVID)
A 1 2
B 2 3
C 3 3
D 4 2
Uplink 5 1
Table 14: Ingress table for device on left
Terminal Port Port VLAN
identifier (PVID)
Uplink 1 1
E 2 2
F 3 3
G 4 2
H 5 3
Table 15: Ingress table for device on right
VLAN ID Port
1 2
1
2 U
3 U
Table 16: Egress table for device on left
VLAN ID Port
1 2
1 U
Table 17: Egress table for device on right
UM BasicConfig L2E
Release 8.0 05/2013
3 4 5
U
U T
U T
3 4 5
8.6 VLANs
151