User guide

EDA System Services
1/1551-HSC 901 35/3 Uen C 2005-12-02
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The IP DSLAM supports up to five VLAN tags (including the two it can add),
in order to enable QinQ of frames that where QinQ is already used. If a
frame already contain four tags, and the IP DSLAM should add two tags,
the frame will be discarded.
The IP DSLAM supports two types of QinQ:
• IEEE 802.1Q (Ether type 8100)
• VMAN (Ether type 8A88) VLAN stacking defined by Extreme Networks.
The two QinQ types cannot be mixed within the same service. The inner
VLAN can be changed individually for each End-user PVC, that is, different
End-users can have different inner VLANs for the same service.