34CHAPTER 2: CONFIGURATION

Defining a Range of IP Addresses for Authorized Access

You can define a range of IP addresses for authorized access by using the Network Mask field in the authorized access list.

The network mask that you type in this field masks the IP address for that entry to define a range of authorized IP addresses.

For example, a network mask of 255.255.255.255 prevents access from all IP addresses except the destination IP address. An entry with a destination IP address of 139.78.202.192 and a network mask of 255.255.0.0 grants access to all stations with IP addresses within the range of 139.78.0.0 and 139.78.255.255. An entry with the same IP address and a network mask of 255.0.0.0 grants access to all stations with an IP address beginning with 139.

Threshold

Threshold monitoring provides local monitoring of any MIB object’s value and

Monitoring

establishes threshold levels for which events can be generated. You can select

Configuration

which objects to monitor and designate the threshold levels. Threshold values

 

can be provisioned independently to issue events if the actual values cross the

 

thresholds. This is different from trap filtering which describes how to

 

configure the frequency of the traps. This, instead, places thresholds on

 

certain performance parameter values and issues a trap when the threshold is

 

exceeded.

To set threshold monitoring from IP Telephony Manager:

1Open a console window for the device where the threshold is going to be set. (For the Media Gateway, you need to select the edge server card.)

2From the Configuration menu, click Programmed Settings.

3Select the 3COM SNMP SubAgent from the Select Entity window (For Back-end Servers and the Gatekeeper, select 3Com SNMP Agent.) and click OK.

Figure 8 Selecting an Entity Window

4From the Parameter Group Selection window, select Threshold Monitor Configuration.

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3Com 5210 manual Defining a Range of IP Addresses for Authorized Access, Threshold, Monitoring, Exceeded
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5210 specifications

The 3Com 5210 is a robust and reliable networking switch designed to meet the demands of modern IT environments. Aimed at businesses looking for a balance of performance and manageable costs, the 5210 series provides essential features that cater to the needs of various industries.

One of the standout features of the 3Com 5210 is its support for high-performance switching. With a switching capacity of up to 104 Gbps, the device is built to handle a significant amount of data traffic, making it suitable for environments with heavy workloads. Coupled with a forwarding rate of 77.4 million packets per second, the 5210 guarantees minimal latency, ensuring that data is transmitted swiftly and efficiently across the network.

The 5210 switch supports Layer 2 and Layer 3 switching, allowing for flexibility in network design and operational efficiency. The Layer 3 functionality enables IP routing, facilitating better traffic management and segmentation across IP networks. This is particularly useful for organizations looking to optimize their network performance and ensure efficient load distribution.

In terms of security, the 3Com 5210 incorporates advanced features designed to protect enterprise networks from potential threats. The switch supports VLANs, which help in segmenting network traffic, along with port security features to minimize unauthorized access. Moreover, it provides access control lists (ACLs) that allow administrators to define rules for data transmission, enhancing overall security.

The device is also equipped with Quality of Service (QoS) capabilities, which prioritize different types of traffic to ensure that critical applications receive the bandwidth they require. This is crucial for businesses that rely on voice over IP or video conferencing, as it ensures clear and uninterrupted communication.

Management and monitoring are simplified via a user-friendly web interface, allowing network administrators to configure settings, monitor traffic, and troubleshoot issues easily. The switch supports Simple Network Management Protocol (SNMP), enabling remote management and ensuring that IT teams can respond to problems without being physically present at the location.

The 3Com 5210 is characterized by its reliability and durability. Built with robust hardware components, the switch is designed for continuous operation, suitable for both small offices and larger enterprise networks. With its combination of performance, security, and manageability, the 3Com 5210 stands out as a valuable asset for organizations aiming to enhance their networking capabilities.
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