Out-of-Band NAC Design Procedures

2. Determine the Number of NAC Gateways

The number of NAC Gateways to be deployed on the network is a function of the following parameters:

•The number of Security Domains configured on the network.

Each NAC Gateway appliance may be associated to only one Security Domain. Therefore, the number of NAC Gateways deployed on the network will be greater than or equal to the number of Security Domains configured in NAC Manager. To support redundancy per Security Domain, at least two NAC Gateways must be deployed per Security Domain, as discussed below.

•The number of authenticating users and devices that are connected to each Security Domain.

Each NAC Gateway appliance has the capability of supporting a maximum number of authenticating devices as shown in the following table:

Table 5-4 End-System Limits for NAC Gateways

NAC Gateway Model

Concurrent End-Systems Supported

 

 

NSTAG-FE100-TX

Up to 500

 

 

7S-NSTAG-01(-NPS)

Up to 1000

 

 

NSTAG-GE250-TX

Up to 1250

 

 

SNS-TAG-LPA

Up to 2000

 

 

SNS-TAG-HPA

Up to 3000

 

 

SNS-TAG-ITA

Up to 3000

 

 

To roughly determine the number of required NAC Gateways per Security Domain, use the following formula:

Number of authenticating end‐systems in a Security Domain / Concurrent end‐systems supported by gateway type = the number of required gateways of that type per Security Domain.

For example, if you have 9000 end‐systems connecting to a Security Domain, and you will be using SNS‐TAG‐ITA appliances, then the formula would be:

9000 / 3000 = 3 required ITA appliances

For each switch in a particular Security Domain, the maximum number of authenticating end‐ systems that may be connected to the switch at any one moment must be considered when associating a switch to a particular NAC Gateway appliance. Multiple intelligent switches residing in same Security Domain may be pointed to the same NAC Gateway, provided the maximum number of authenticating end‐systems for the particular NAC Gateway is not exceeded. (Note that two switches in different Security Domains cannot be associated to the same NAC Gateway.)

•Configuration of NAC Gateway redundancy for each switch in a Security Domain.

NAC Gateway redundancy for a particular switch is achieved by configuring two different NAC Gateways as primary and secondary RADIUS servers for that switch, as depicted in Figure 5‐5 on page 5‐21. When connectivity to the primary NAC Gateway is lost, the secondary NAC Gateway is used. Note that this configuration supports redundancy and not load‐sharing, and the second NAC Gateway will only be used in the event that the primary NAC Gateway becomes unreachable.

5-20 Design Procedures

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Enterasys Networks 9034385 manual Determine the Number of NAC Gateways
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9034385 specifications

Enterasys Networks 9034385 is a powerful networking component designed to enhance enterprise-level connectivity and ensure robust network management capabilities. This device offers a wide range of features that cater to the demanding requirements of modern businesses, focusing on performance, reliability, and security.

One of the main features of the Enterasys Networks 9034385 is its advanced Layer 2 and Layer 3 switching capabilities, which enable efficient data processing and robust network performance. With support for various VLAN configurations, the device allows organizations to segment their networks effectively, leading to improved security and better traffic management.

Another critical aspect of the 9034385 is its support for high-speed connectivity. The device features multiple gigabit Ethernet ports, providing sufficient bandwidth for data-intensive applications commonly used in enterprise environments. The high-speed connections ensure that users can access applications and data quickly and reliably, minimizing latency issues that can affect productivity.

In terms of management, Enterasys Networks has equipped the 9034385 with advanced monitoring and diagnostic tools. These capabilities allow network administrators to track performance metrics, identify potential issues proactively, and make informed decisions about network resource allocation. The inclusion of SNMP (Simple Network Management Protocol) facilitates seamless integration with network management systems, providing comprehensive oversight of network health and performance.

Security is a paramount consideration for the 9034385, which incorporates advanced security protocols to protect sensitive data. Features such as port security, DHCP snooping, and dynamic ARP inspection help safeguard the network against unauthorized access and cyber threats. Furthermore, the device supports authentication mechanisms like 802.1X, ensuring that only authorized users and devices can connect to the network.

The Enterasys Networks 9034385 also stands out due to its seamless integration with cloud-based services and support for virtualization technologies. This compatibility enables organizations to adopt flexible architectures and manage their resources more efficiently. Additionally, the device is designed with scalability in mind, allowing businesses to expand their networks without significant hardware changes or disruptions.

Overall, the Enterasys Networks 9034385 is a versatile and powerful networking solution ideal for enterprises looking to enhance their network infrastructure while ensuring performance, security, and ease of management. The combination of advanced features and technologies makes it a valuable asset for businesses of all sizes striving for efficient and reliable connectivity.
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