Cerberus ADSL2+ Wi-Fi (P 6331-5)
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Glossary:
•
Multiplexing
- Two conventions identify what protocols a virtual circuit (VC) is carrying.
Be sure to use the multiplexing method your ISP requires:
VC-Based Multiplexing
– In VC-based multiplexing, by prior mutual agreement, each
protocol is assigned to a specific virtual circuit. For example, VC1 carries IP, etc. VC-
based multiplexing may be dominant in environments where dynamic creation of large
numbers of ATM VCs is fast and economical.
LLC-Based Multiplexing
– In LLC-based multiplexing, one VC carries multiple protocols
with protocol-identifying information contained in each packet header. While this method
requires extra bandwidth and processing overhead, this method may be advantageous if
it is not practical to have a separate VC for each carried protocol; for example, if charging
heavily depends on the number of simultaneous VCs.
•
VPI and VCI
- Be sure to use the Virtual Path Identifier (VPI) and Virtual Channel
Identifier (VCI) numbers assigned to you. The valid range for the VPI is 0 to 255. The
valid range for the VCI is 32 to 65535. 0 to 31 is reserved for local management of ATM
traffic.
•
PPPoA
– Point-to-Point Protocol over ATM Adaptation Layer 5 (AAL5) (PPPoA) provides
access control and billing functionality in a manner similar to dial-up services using PPP.
The router encapsulates the PPP session based on RFC1483 and sends it through ATM
PVC to the ISP’s DSLAM.
•
PPPoE
– Point-to-Point Protocol over Ethernet provides access control and billing
functionality in a manner similar to dial-up services using PPP. The router bridges a PPP
session over Ethernet (PPP over Ethernet, RFC 2516) from your computer to an ATM
Permanent Virtual Circuit (PVC) that connects to the ADSL Access Concentrator, where
the PPP session terminates. Single PVC can support any number of PPP sessions from
your LAN.
Summary of Contents for Cerberus ADSL2+ Lite
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