Chapter 3: Terminal Menu Operation and Structure

Radius Server/Retry Count

Write security: 1; Read security: 2

This is the number of times the Express XL/XLT should send a request packet to the RADIUS server without a response before giving up. If the number of attempts to communicate with the primary server is equal to the retry count, the secondary server (if defined) is tried. If the secondary server does not re- spond within the retry count, the PPP peer (or Telnet session) is not authenti- cated and is dropped. The default is 5.

Security/PPP

Write security: 1; Read security: 2

The PPP peer can be authenticated using three standard methods: PAP (Pass- word Authentication Protocol), CHAP (Challenge Handshake Protocol) and EAP (Extensible Authentication Protocol). The strength of the authentication is determined in the order EAP, CHAP, followed by PAP, where EAP is the strongest and PAP is the weakest. PAP is a clear-text protocol, which means it is sent over the PPP link in a readable format. Care must be taken not to al- low highly sensitive passwords to become compromised using this method. CHAP and EAP use a one-way hashing algorithm which make it virtually im- possible to determine the password. EAP has other capabilities which allow more flexibility than CHAP.

The following selections are possible:

PAP, CHAP or EAP (def) - The Express XL/XLT will ask for EAP during the first PPP LCP negotiation and allow the PPP peer to negotiate down to CHAP or PAP.

CHAP or EAP - The Express XL/XLT will ask for EAP during the first PPP LCP negotiation and allow the PPP peer to negotiate down to CHAP but not PAP.

EAP - The Express XL/XLT will only allow EAP to be negotiated. If the PPP peer is not capable of doing EAP, then the connection will not succeed.

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Express XL/XLT User Manual

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ADTRAN Express XLT user manual Radius Server/Retry Count, Security/PPP
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Express XLT, Express XL specifications

ADTRAN has established itself as a leading provider of telecommunications solutions, and among its impressive lineup, the ADTRAN Express XL and Express XLT stand out as robust offerings designed for the evolving demands of modern networks. These devices cater to service providers and enterprises looking to enhance their broadband delivery capabilities while ensuring cost-efficiency and reliability.

The ADTRAN Express XL is a high-capacity, next-generation fiber optic access platform. It is engineered to support a wide array of technologies, including Passive Optical Network (PON) standards such as GPON and XGSPON. The Express XL's architecture allows for seamless scalability, making it a perfect fit for both small-scale deployments and expansive network rollouts. What sets it apart is its ability to deliver ultra-fast broadband services to residential, business, and mobile backhaul customers with its impressive throughput capabilities.

On the other hand, the Express XLT builds upon the success of the Express XL by incorporating advanced features aimed at maximizing operational efficiency. It supports technologies including Active Ethernet and offers flexible network configurations to meet specific service requirements. Both models utilize ADTRAN’s innovative Dynamic Bandwidth Allocation technology, which dynamically allocates bandwidth to users based on real-time demand, ensuring optimal performance and user satisfaction.

A key characteristic of both ADTRAN Express XL and XLT is their energy efficiency. Designed to minimize operational costs, these units use power-saving technologies that reduce energy consumption without compromising performance. Furthermore, they include built-in support for network functions virtualization (NFV) and software-defined networking (SDN), providing operators with the agility to adapt their networks in response to changing market conditions.

In addition to their advanced technological underpinnings, the Express XL and XLT boast an intuitive management interface, simplifying network monitoring and management tasks. They also feature comprehensive telemetry and analytics capabilities that help operators gain insights into network performance, optimize configurations, and troubleshoot potential issues before they affect end users.

Ultimately, the ADTRAN Express XL and Express XLT are pivotal components for service providers aiming to deliver high-speed broadband services effectively. With their blend of flexibility, scalability, and energy efficiency, these access platforms are well-positioned to meet the current and future demands of telecommunications networks worldwide.
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