General Configuration Using Local Management

3.Use the arrow keys to highlight the SAVE command field at the bottom of the screen and then press ENTER. The message “SAVED OK” displays.

NOTE

You can type in the UDP port number, or you can use the +REDIRECTOR- option at the bottom of the screen to scroll through a list of commonly used UDP port numbers. To use the +REDIRECTOR- option, use the arrow keys to highlight the + (to go forward), or the - (to go backward), and then press the ENTER key to scroll in the direction that you selected.

The entry for the UDP Port option reflects the UDP port number that is currently selected. The entry for UDP Type names the UDP service to which that port number corresponds.

Enabling Proxy ARP on a Port

By default, Proxy Address Resolution Protocol (ARP) is disabled on all ports, and IP Routing Services respond only to ARP requests addressed to its own IP address.

For one IP host to communicate with another IP host, knowledge of the target host’s MAC address must be known. To learn this MAC address, the IP host sends an ARP request packet as a LAN broadcast with the destination IP address of the target IP host. All hosts receive this broadcast and the one host that matches the target IP address responds with its MAC-layer address. However, because each subnet constitutes a separate broadcast domain and LAN broadcasts are not forwarded across routers, ARP does not work beyond a host’s local network or subnetwork. One of the primary purposes of a router is to confine LAN broadcast traffic to each local network or subnetwork.

A proxy ARP response is generated when the following occurs:

•Proxy ARP is enabled on a router port.

•An ARP request is received as a LAN broadcast (looking for the MAC-layer address of an IP host on another network segment).

•An entry exists in the IP Forwarding Table for the destination host’s network.

Enabling Proxy ARP on a router port allows IP hosts to dynamically obtain the MAC-layer address of other IP hosts attached to different networks or subnetworks by using broadcast ARP request packets. With Proxy ARP enabled, IP hosts are not required to maintain knowledge of specific subnetworks.

To enable Proxy ARP on a router port, complete the following steps:

1.Use the arrow keys to highlight the Proxy ARP option.

2.Use the ENTER key to toggle the entry to ENABLED.

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Cabletron Systems CSX400-DC manual Enabling Proxy ARP on a Port
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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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