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Router Role
1/1553-HSC 901 86/1 Uen A 2006-02-21
5
3 Router Role
The Router or BRAS plays an important role in the Shared DSL concept,
and must perform the following functions:
• DHCP requests from the IP DSLAM in the remote site must be relayed
towards the EDA network, using the management VLAN ID.
• The Management PVC from the remote site must be mapped to the
EDA Management VLAN.
• If PPPoE or PPPoA is used for the END-user traffic, it must be
terminated by the BRAS.
• If the Router (or BRAS) is not an Edge Node of the EDA network as
well, a tunnel must be established to the EDN network (for example
L2TP or another VPN solution, see Figure 2 on page 5).
EDA
Network
Router/
BRAS
Broadband
Network
Management
PVC
Management
VLAN
EDA
Network
Broadband
Network
Management
PVC
Tunnel
Router/
BRAS
Primary
Access Provider
Secondary
Access Provider
Primary
Access Provider
Secondary
Access Provider
Router/
BRAS
Management
VLAN
Figure 2 Management Traffic Mapping