4.1.3 PPP over Ethernet (PPPoE) over ATM
ISP
ATU-R
ATM-VC B-RAS
IP
PPP
2516
IP
PPP
2516
802.3
1483
AAL5
DSLAM
ATM
PPP
2516
802.3
1483
AAL5
ATM
IP Routing
802.3
WAN Media
802.3
ADSL
ADSL
OC-3
OC-3
LAN Media
Figure 55 PPP over Ethernet (PPPoE)
PPPoE uses Ethernet networking with PPP in an encapsulation
scheme designed for multi-PC homes and small businesses.
PPPoE enables multiple PCs to connect to multiple destinations
through a single, shared CPE using one PVC. This is based on
the standard RFC 2516 ‘PPP over Ethernet’.
4.1.4 PPP over ATM (PPPoA)
PPPoA has a great advantage in reducing the overhead required in
PPPoE. It is based on the standard RFC 2364 ‘PPP over AAL 5’.
ATU-R
OR
ATM-VC B-RAS
ISP
LAN
IP
DSL
Router
IP
PPP
2364
AAL5
DSLAM
ATM
PPP
2364
ATM
IP Routing
802.3
WAN Media
802.3
ADSL
ADSL
OC-3
OC-3
LAN Media
Figure 56 PPP over ATM (PPPoA)
MTT-14B e_Manual D07-00-083P RevA00
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