ZyXEL Communications ES-1552 - V1.12, Руководство пользователя

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ES-1552 User’s Guide
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P P E N D I X
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Product Specifications
This section describes the general software features of the switch.
Table 71 Firmware Features
FEATURE DESCRIPTION
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.
Layer 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.
Note: Only upload firmware for your specific model!
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.