IronPort Systems ES-1528 User Manual

ES-1528 User’s Guide

This section describes the general software features of the switch.

Table 70   Firmware Features

VLAN

A VLAN (Virtual Local Area Network) allows a physical network to be 

partitioned into multiple logical networks. Devices on a logical network 

belong to one group. A device can belong to more than one group. With 

VLAN, a device cannot directly talk to or hear from devices that are not 

in the same group(s); the traffic must first go through a router.

Level 2 Management

Forward traffic based on the destination MAC address and VLAN group 

(ID).

QoS

Queuing is used to help solve performance degradation when there is 

network congestion. Two scheduling services are supported: Strict 

Priority (SP) and Weighted Round Robin (WRR). This allows the switch 

to maintain separate queues for packets from each individual source or 

flow and prevent a source from monopolizing the bandwidth. 

Rate Control

Rate control is a combination of bandwidth management and broadcast 

storm control. This feature allows you to set limits for incoming and 

outgoing traffic on the ports. The broadcast storm control feature helps 

prevent broadcast, multicast or unknown unicast traffic from flooding 

your network.

Port Mirroring

Port mirroring allows you to copy traffic going from one or all ports to 

another or all ports in order that you can examine the traffic from the 

mirror port (the port you copy the traffic to) without interference. 

Link Aggregation 

Link aggregation (trunking) is the grouping of physical ports into one 

logical higher-capacity link. You may want to trunk ports if for example, it 

is cheaper to use multiple lower-speed links than to under-utilize a high-

speed, but more costly, single-port link.

Device Management

Use the web configurator to easily configure the rich range of features on 

the switch.

Firmware Upgrade

Download new firmware (when available) from the ZyXEL web site and 

use the web configurator to put it on the switch.

Configuration Backup & 

Restoration

Make a copy of the switch’s configuration and put it back on the switch 

later if you decide you want to revert back to an earl

i

er configuration.

Auto DoS

The Automatic Denial of Service (DoS) attack detection and prevention 

feature helps protect you from hackers trying to disrupt or shut down 

your network. 

Auto VoIP

The Automatic VoIP feature grants the highest priority to VoIP traffic 

ensuring better sound quality and reliability for end users.