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APC IP DSLAM User's Guide Page 32

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EDA 1200 System Overview
As illustrated, the S tag determines the broadcast domain in the Access
Domain. The layer 2 separation for the data traffic is achieved by filtering the
traffic to the End-user. The IP DSLAM will discard any traffic that does not
come with the correct C tag value.
3.1.2.4 EFN324: VLAN Based Traffic Mapping
The traffic mapping in Fiber/Cat5 is based on single VLAN tag, double VLAN
tag or no VLAN tag as well as IP destination address. The following definitions
are possible:
• Port + End-user VLAN ID. VLAN ID can be either a specific value, a range,
wildcard (any VLAN ID) or untagged.
• Port + End-user VLAN ID + IP destination (in upstream packets). VLAN
ID can be either a specific value, a range, wildcard (any VLAN ID) or
untagged. IP destination is specified as either a specific IP address, or
as an IP network.
• Port + End-user outer VLAN ID (specific value or wildcard) + End-user
inner VLAN ID (specific value)
• The following traffic mapping (VLAN tagging of outgoing traffic) is possible
(after a packet has been identified):
Table 6 Outgoing Frames VLAN Tagging Possibilities
Outer VLAN ID Outer VLAN
Ethertype
Inner VLAN ID Inner VLAN
Ethertype
1
None
(untagged)
None
(untagged)
None
(untagged)
None
(untagged)
2
Specific value or
End-user outer
VLAN ID
Specific or
End-user outer
VLAN Ethertype
None None
3
Specific value Specific
Ethertype
Specific value or
End-user outer
VLAN ID
Specific or
End-user outer
VLAN Ethertype
4
Specific value or
End-user outer
VLAN ID
Specific or
End-user outer
VLAN Ethertype
Specific value or
End-user inner
VLAN ID
Specific or
End-user inner
VLAN Ethertype
Explanation of terms:
•Aspecific value is an operator specified VLAN ID configured in the EFN.
If a service is configured to use a specific value, this value will be used
regardless of which type of traffic (tagged or untagged) was used by the
End-user.
•Aspecific Ethertype is an operator specified Ethertype configured in the
EFN. The following types can be configured:
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