Ericsson EFN324 - Page 60

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vlan 2 vlan 3
tags
untagged
tags
2 - 4
tag 22
tag
transparent
Dest A
tag
transparent
Dest B
1 2
3
4
5
Figure 27 Example of Ingress and Egress Connections
Table 5 on page 56 shows the switching behavior which results from the
connections illustrated in Figure 27.
Table 5 Examples of Switching Behavior
Incoming packet Switch decisions
Untagged. Forwarded to switching domain 2,
from switching domain 2 forwarded
to port 5. A VLAN Tag with VLAN
ID 22 is inserted in the packet.
VLAN ID equal to anything but 2, 3
or 4.
Packet discarded at ingress port.
VLAN ID equal to 2, destination
address A.
Forwarded to switching domain 3.
Switching domain 3 forwards the
packet to port 7. The VLAN Tag is
untouched (‘transparent’).
VLAN ID equal to 2, destination
address B.
Forwarded to switching domain 3.
Switching domain 3 forwards the
packet to port 9. The VLAN Tag is
untouched (‘transparent’).