Choosing your LAN Settings

The LAN settings screen, shown in Figure 23 below, displays the Gateway’s current IP address and subnet mask. If this is the first time the Wizard has been run it will display the default address and subnet mask.

Figure 23 LAN IP Address Screen

1Enter your chosen IP address for the Gateway in the IP Address field. This should be a private network so that it does not conflict with IP addresses on the Internet. See “Private IP Addresses” on page 75.

3Com recommends that you use the default IP address and subnet mask unless you already have a network that uses different values.

2Enter your chosen subnet mask in the Subnet Mask field. This should be large enough to contain all your computers and other network devices. The default (255.255.255.0) allows for 254 devices including the Gateway.

If you are going to set up an IPSec VPN with another Gateway you must set your subnet mask to 255.255.255.0. See “Configuring VPNs” on page 53.

Activating DHCP

The Gateway contains a Dynamic Host Configuration (DHCP) server that can automatically configure the TCP/IP settings of every computer on your network. The DHCP Server Setup screen is shown below.

If you intend to use the Gateway to control the permissions of individual machines on your network then you must use the Gateway’s DHCP server to allocate addresses or use static addressing. If you use another DHCP server you may get unexpected results. See “PC Privileges” on page 47.

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3Com 3CR856-95 manual Choosing your LAN Settings, Activating Dhcp

3CR856-95 specifications

The 3Com 3CR856-95 is a versatile networking device designed to meet the demands of small to medium-sized businesses. As a part of the 3Com OfficeConnect series, the 3CR856-95 combines switching, routing, and security features into a compact, integrated solution that enhances network performance and reliability.

One of the main features of the 3CR856-95 is its ability to support multiple network configurations. It operates as a router and switch simultaneously, offering six Ethernet ports for wired connections, while also integrating wireless capabilities. This allows businesses to connect various devices seamlessly, including computers, printers, and smartphones, providing flexibility and convenience in a modern office environment.

The device incorporates advanced technologies such as Quality of Service (QoS) which prioritizes network traffic to ensure that bandwidth-intensive applications like video conferencing and VoIP run smoothly. This feature is essential for maintaining productivity and communication efficiency in busy office settings. Additionally, the 3CR856-95 supports both IPv4 and IPv6 protocols, making it a future-proof solution as businesses transition to the newer Internet Protocol standard.

Security is a critical consideration for any networking equipment, and the 3CR856-95 addresses this with robust measures. It includes a built-in firewall that protects the network from external threats, along with support for Virtual Private Networks (VPN), allowing secure remote access for employees working from off-site locations. Furthermore, the device supports WPA2 encryption for wireless connections, safeguarding sensitive data transmitted over the network.

Another important characteristic of the 3CR856-95 is its user-friendly interface, which simplifies the setup and management of the network. The device features a web-based management console that allows network administrators to easily configure settings, monitor traffic, and troubleshoot issues from any internet-connected device. This accessibility saves time and reduces the complexity often associated with network management.

In summary, the 3Com 3CR856-95 is a robust and feature-rich networking solution tailored for small to medium-sized businesses. With its combination of switching, routing, and security features, it provides a reliable platform for facilitating seamless communication and connectivity. Its support for advanced technologies and user-friendly management interface makes it a smart choice for organizations looking to enhance their network infrastructure.