ATM Option System Reference - Comtech EF Data

ATM Option
1.3.6 ATM Multiplex Connections
• PAP: Provides “one-shot” password protection, as described in RFC-1334.
- Configurable PAP parameters are: User name, Password, Authentication
Retries and Fail Delay (in minutes).
- The Fail Delay takes effect if the number of Authentication Retries has been
exceeded. It forces the PVC connection into an idle state, which reduces the
risk of a password attack.
• CHAP: Requests authentication from the remote side at random intervals, as
described in RFC-1994.
- This method reduces the chance of unauthorized access, particularly for longterm
connections.
- CHAP requires the same parameters as PAP, plus the Maximum Challenge
Interval (in minutes) and Authentication Timeout (in seconds).
On the NetPerformer, multiplexing an ATM application over PowerCell can be
accomplished through the ATM-MULTIPLEX PVC mode. This mode is ideal for
transporting traffic from any type of ATM Adaptation Layer. ATM-MULTIPLEX is also the
only PVC mode that can support AAL2 and AAL3/4 traffic.
Figure 1-9: Using the NetPerformer as an ATM Multiplexer
NOTE: A configuration example for this application is provided on “Using the Net-
Performer as an ATM Multiplexer” on page 2-36.
For the ATM-MULTIPLEX PVC mode the notion of ATM Adaptation Layer is an important
one. It can be defined as either AAL0 (a NetPerformer product-specific term) or AAL5.
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