1 Introduction

learned via GVRP, or ports can be manually assigned to a specific set of VLANs. This allows the switch to restrict traffic to the VLAN groups to which a user has been assigned. By segmenting your network into VLANs, you can:

•Eliminate broadcast storms which severely degrade performance in a flat network.

•Simplify network management for node changes/moves by remotely configuring VLAN membership for any port, rather than having to manually change the network connection.

•Provide data security by restricting all traffic to the originating VLAN.

•Use private VLANs to restrict traffic to pass only between data ports and the uplink ports, thereby isolating adjacent ports within the same VLAN, and allowing you to limit the total number of VLANs that need to be configured.

•Use protocol VLANs to restrict traffic to specified interfaces based on protocol type.

Traffic Prioritization – This switch prioritizes each packet based on the required level of service, using eight priority queues with strict or Weighted Round Robin Queuing. It uses IEEE 802.1p and 802.1Q tags to prioritize incoming traffic based on input from the end-station application. These functions can be used to provide independent priorities for delay-sensitive data and best-effort data.

This switch also supports several common methods of prioritizing layer 3/4 traffic to meet application requirements. Traffic can be prioritized based on the priority bits in the IP frame’s Type of Service (ToS) octet or the number of the TCP/UDP port.

When these services are enabled, the priorities are mapped to a Class of Service value by the switch, and the traffic then sent to the corresponding output queue.

Multicast Filtering – Specific multicast traffic can be assigned to its own VLAN to ensure that it does not interfere with normal network traffic and to guarantee real-time delivery by setting the required priority level for the designated VLAN. The switch uses IGMP Snooping and Query to manage multicast group registration.

System Defaults

The switch’s system defaults are provided in the configuration file

“Factory_Default_Config.cfg.” To reset the switch defaults, this file should be set as the startup configuration file (page 3-21).

The following table lists some of the basic system defaults.

 

Table 1-2 System Defaults

 

 

 

Function

Parameter

Default

 

 

 

Console Port

Baud Rate

auto

Connection

 

 

Data bits

8

 

 

 

 

 

Stop bits

1

 

 

 

 

Parity

none

 

 

 

 

Local Console Timeout

0 (disabled)

 

 

 

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