User guide

EDA System Design
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c Non-IP-traffic filtering
2. Separating traffic types in different VLANs within the Access Domain,
for example a separate VLAN for management traffic.
This access scenario imposes no limits to what IP services can be offered.
However, unmanaged access to Telephony over IP service may be
considered inappropriate due to the lack of security and charging options.
Consequently, Figure 60 on page 97 illustrates the use of base band POTS
instead.
Figure 60 Base band POTS with and without Service Selection
10.3.2 Service Selection Using a BRAS
Service selection based on a Broadband Access Server offers a multitude
of access functions integrated in a single entity.
End-user authentication is performed using either PPP or HTTP. In the first
case, the subscriber initiates a PPPoE client on the CPE host in order to
start a PPP session. In the other case, the BRAS presents a web page to
the subscriber on which the login must be performed.