Planning for CSX400 ISDN Configuration

IPX Routes — If the CSX400 is to direct traffic to network segments and servers beyond the remote router, the routing table in the CSX400 can be “seeded” with static IPX routes. An IPX route includes a network number, hop count and ticks. The hop count is the number of routers through which traffic must pass to reach the remote network segment or server. Ticks represent how much time the packet takes to reach the destination in roughly 1/18th of a second increments.

The CSX400 routing information table must be seeded statically so that it dials out to the appropriate remote router when IPX traffic is targeted to network segments or servers beyond that remote router. After the link is established, RIP update packets dynamically add to the routing information table in the CSX400. Seeding the routing table is not necessary when a CSX400 never dials out; it will discover routes beyond the calling router as soon as RIP updates arrive (provided the remote router supports RIP).

IPX SAPs — If the CSX400 is to obtain services beyond the remote router, the CSX400 SAP services table must be seeded statically. A SAP service is identified by a server name and corresponding server type, network number, node number and socket. The socket number represents the service (application) within the server node.

The CSX400 SAP services table must be seeded statically so that the device can direct traffic to the appropriate remote router when a service is requested from a server beyond that remote router. After the link is established, SAP broadcast packets dynamically add to the target router services table. Seeding the table is not necessary when a CSX400 never dials out; it will discover remote services beyond the calling router as soon as SAP broadcasts arrive (provided the remote router supports IPX).

IPX Network Numbers — IPX network numbers are assigned to LAN network segments as well as servers. These numbers should be unique for all IPX networks on the Internetwork.

IPX external network numbers refer to the physical LAN network segments to which servers and routers are connected. The WAN link network number is an external IPX network number. This is a unique number that you choose (or are given by the network administrator) to represent the WAN link between the CSX400 and remote router. The local Ethernet IPX network number is also an external network number.

Servers are identified with internal network numbers. This is a logical network number that identifies the individual server. For a local router to access a server beyond the remote router, you specify a route using the internal network number of a server. To seed the routing table to access a network segment, you specify the external network number of the LAN segment. The network number in the SAP table is the internal network number of the server.

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Cabletron Systems CSX400-DC manual Planning for CSX400 Isdn Configuration
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CSX400-DC, CSX400 specifications

Cabletron Systems was a leading developer of networking solutions, and its CSX400 and CSX200 series of high-performance switches represent some of the key innovations in the field of enterprise networking during their time. Both models were geared towards enhancing network reliability, efficiency, and speed, particularly in environments where heavy data traffic and complex networking demands were prevalent.

The CSX400, designed for larger enterprises, boasts a robust architecture capable of handling significant throughput. One of its standout features is its stackable design, allowing multiple switches to be interconnected and managed seamlessly as a single unit. This scalability provides organizations with the flexibility to expand their networks without significant infrastructure overhauls. The CSX400 supports various Ethernet standards, including 10/100 Ethernet and Gigabit Ethernet, positioning it to effectively manage both legacy and modern networking requirements.

In addition to its scalability, the CSX400 is distinguished by its advanced Layer 2 and Layer 3 routing capabilities. This dual-layer functionality enables efficient data handling and is instrumental in managing traffic between different network segments. Moreover, the switch incorporates features like VLAN (Virtual Local Area Network) support and Quality of Service (QoS) prioritization, allowing for enhanced performance of critical applications and streamlined bandwidth allocation.

On the other hand, the CSX200 series is tailored for smaller enterprises or branch offices needing a reliable yet efficient networking solution. Despite its compact design, the CSX200 is equipped with essential features that promote effective network management and security. It offers a simplified management interface, making it user-friendly for network administrators. The switch also provides essential access control measures, employing technologies like IEEE 802.1X for network access security.

Both the CSX400 and CSX200 prioritize performance through the incorporation of advanced switching technologies. They support features such as Spanning Tree Protocol (STP), enabling loop-free topologies and enhanced network resilience. These attributes are particularly crucial in dynamic networking environments where downtime can have significant repercussions on business operations.

Overall, Cabletron Systems' CSX400 and CSX200 series represent a blend of scalability, advanced routing capabilities, and user-friendly management, making them vital assets for organizations looking to optimize their network infrastructure during a period of rapid technological evolution. With their rich feature sets and unwavering performance, these switches helped pave the way for modern networking solutions that cater to diverse enterprise needs.
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