Ericsson EFN324, User Manual, Page: 21 / 176

Glossary
p­bit value instead of Ethertype. The way that the ingress connection is
configured must be taken into consideration when settings the egress
connection.
EFN324
Egress
connection Ingress
connection
Service VLAN
Switching
Domain
Upstream
tags
tag
Figure 9 Ingress and Egress tag Configuration
For example if
tags
in the ingress connection is configured as untagged,
setting the
tag
in the egress connection to transparent will have no meaning
since there is no VLAN ID to copy.
The table shows four main scenarios that are depended on the incoming
format of the frame and the desired output:
1 Untagged traffic: use this to send untagged traffic from the EFN, with no
regards to the format of the incoming packets.
2 Single tagged frame in ­ Single tagged frame out: use this to send a single
tagged frame out where the sent VLAN can either be translated or copied
from the incoming frame.
3 Single tagged frame in – Double tagged frame out: Use this to send
double tagged frames out with a fixed outer VLAN and an Inner VLAN that
is either translated or copied from the VLAN tag of the incoming traffic.
4 Double tagged frame in – Double tagged frame out: Use this to send
double tagged frames out with an outer VLAN that is copied from the outer
VLAN of the incoming frame and an Inner VLAN that is either translated or
copied from the inner VLAN tag of the incoming traffic.
See also the explanation of terms after the table.