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ADTRAN Express XLT user manual IP Routing

Models: Express XLT Express XL

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Chapter 1: Understanding ISDN and the Express XL/XLT

IP Routing

The Express XL/XLT operates as a dial-up IP router when the Configuration/ IP/IP Router/Mode option is configured to On. The Express XL/XLT uses an IP unnumbered WAN interface; the IP address and mask assigned to the unit’s LAN interface apply to all routing and IP operations for the unit. If a default gateway is specified on the network of the Ethernet interface, the unit attempts to reach the gateway through that interface. If the gateway is specified on an unknown network, the unknown network is assigned to the router table and remains unused until that gateway becomes the peer on a WAN connection. If no default gateway is specified, the first connected peer on the WAN inter- face becomes the default gateway (recommended for remote applications when there are no other routers on the remote LAN).

For each profile in the Connection List that includes an IP address and has the Configuration/Connection List/IP/Route/Static Route option set to Yes, the Network Address of the specified IP address is added to the router table with the Host Address as the gateway. If the Configuration/Connection List/IP/ Route/Private option is set to No, the route is advertised at the specified metric through the unit’s interfaces as if a connection is active to that network. These routes are referred to as spoofed routes.

Attempts by any computer connected to the LAN interface to access a host on a spoofed network causes a connection to be attempted using the information from that Connection List profile. Once connected, routes advertised by the peer router are learned and advertised to the local LAN. If Bandwidth-On-De- mand is enabled and an Idle Time-out value is specified, expiration of the Idle Timer causes the link to be disconnected; the routes learned from the peer router are retained if the Configuration/Connection List/IP/RIP/Retain op- tion is set to Yes and advertised as if the connection is still active. These routes are referred to as retained routes. Attempts by any connected computer to ac- cess a host on any of the retained routes causes the link to be redialed. If Hang Up is activated from the Dial menu when the link is down, the retained routes are removed.

The Express XL/XLT can be connected to two WAN destinations at the same time. Each B-channel is dialed to a different location. Routes learned from one WAN destination are advertised to the other using RIP.

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Express XL/XLT User Manual

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ADTRAN Express XLT user manual IP Routing
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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.