Chapter 8 Basic Setting

8.4.1 Smart Isolation

To block traffic between two specific ports within the Switch, you can use port isolation or private VLAN (see Chapter 33 on page 327 for more information). However, it does not work across multiple switches. For example, broadcast traffic from isolated ports on a switch (say B) can be forwarded to all ports on other switches (A and C), including the isolated ports.

A

B

Isolated ports: 2~6

Root port: 7

Designated port: 8

C

Smart isolation allows you to prevent isolated ports on different switches from transmitting traffic to each other. After you enable RSTP/MRSTP and smart isolation on the Switch, the designated port(s) will be added to the isolated port list. In the following example, switch A is the root bridge. Switch B’s root port 7 connects to switch A and switch B’s designated port 8 connects to switch C. Traffic from isolated ports on switch B can only be sent through non-isolated port 1 or root port 7 to switch A. This prevents isolated ports on switch B sending traffic through designated port 8 to switch C. Traffic received on designated port 8 from switch C will not be forwarded to any other isolated ports on switch B.

A

B

Before Smart Isolation:

Isolated ports: 2~6

Root port: 7

Designated port: 8

After Smart Isolation:

C

Isolated ports: 2~6, 8

 

Root port: 7

 

Designated port: 8

 

You should enable RSTP or MRSTP before you can use smart isolation on the Switch. If the network topology changes, the Switch automatically updates the isolated port list with the latest designated port information.

MGS3700-12C User’s Guide

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ZyXEL Communications metrogigabit switch manual Smart Isolation, 105
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metrogigabit switch specifications

ZyXEL Communications has long been a prominent player in the networking hardware industry, providing innovative solutions that cater to both business and consumer markets. Among their notable offerings is the Metrogigabit switch, a device designed to meet the high demands of modern networks.

The ZyXEL Metrogigabit switch is primarily aimed at service providers and large enterprises, recognizing the need for seamless connectivity in an increasingly digital world. This switch is engineered for scalability, enabling users to effortlessly expand their network as their operational needs grow. With support for high bandwidth, it is particularly suited for environments requiring extensive data traffic management, such as data centers and campus networks.

One of the standout features of the Metrogigabit switch is its high-density gigabit Ethernet ports, which provide a backbone for reliable data transmission. The switch typically supports multiple 10G SFP+ uplinks, ensuring fast and efficient connections to upstream devices. This capability allows users to configure their networks to handle large volumes of data quickly and without interruption.

In terms of technology, the Metrogigabit switch leverages advanced Layer 2 and Layer 3 functionalities. This includes features such as VLAN support for traffic segmentation, Quality of Service (QoS) for prioritizing mission-critical applications, and robust multicast management. These capabilities contribute to enhanced network efficiency and performance.

Another characteristic that sets the ZyXEL Metrogigabit switch apart is its built-in security features. The device is designed to protect network integrity through mechanisms like port security, access control lists, and advanced authentication protocols. This focus on security helps prepare businesses to counteract potential threats in a landscape where cyber attacks are increasingly sophisticated.

Moreover, the switch is equipped with a user-friendly management interface, which simplifies the process of monitoring and configuring network settings. This is complemented by support for SNMP and RMON, allowing network administrators to leverage tools for effective performance monitoring.

In summary, the ZyXEL Metrogigabit switch is an essential tool for organizations seeking robust performance, reliability, and security in their networking infrastructure. With its high-density ports, flexible configuration options, and comprehensive management features, it provides a strong foundation for building efficient and scalable networks. Whether for service providers or enterprises, this switch stands out as a reliable choice in the fast-evolving technological landscape.
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