ZyXEL Communications Dimension ES-2048 User Manual page 266

Chapter 35 Product Specifications
Table 105 Firmware Specifications
FEATURE
Default Password
Number of Login Accounts
Configurable on the Switch
VLAN
MAC Address Filter
DHCP (Dynamic Host
Configuration Protocol)
Relay
IGMP Snooping
Queuing
Bandwidth Control
Broadcast Storm Control
Two Rate Three Color
Marker
Differentiated Services
(DiffServ)
Port Mirroring
Static Route
Multicast VLAN Registration
(MVR)
STP (Spanning Tree
Protocol) / RSTP (Rapid
STP)
Loop Guard
266
DESCRIPTION
1234
4 management accounts configured on the Switch.
Authentication via RADIUS and TACACS+ also available.
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.
Filter traffic based on the source and/or destination MAC address and
VLAN group (ID).
Use this feature to have the Switch forward DHCP requests to DHCP
servers on your network.
The Switch supports IGMP snooping, enabling group multicast traffic to
be only forwarded to ports that are members of that group; thus allowing
you to significantly reduce multicast traffic passing through your Switch.
Queuing is used to help solve performance degradation when there is
network congestion. The following scheduling services are supported:
Strict Priority Queuing (SPQ) 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.
Bandwidth control means defining a maximum allowable bandwidth for
incoming and/or out-going traffic flows on a port.
Broadcast storm control limits the number of broadcast, multicast and
destination lookup failure (DLF) packets the Switch receives per second
on the ports.
Two Rate Three Color Marker (trTCM, defined in RFC 2698) is a type of
traffic policing that identifies packets by comparing them to two user-
defined rates: the Committed Information Rate (CIR) and the Peak
Information Rate (PIR).
With DiffServ, the Switch marks packets so that they receive specific
per-hop treatment at DiffServ-compliant network devices along the route
based on the application types and traffic flow.
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.
Static routes allow the Switch to communicate with management
stations not reachable via the default gateway.
Multicast VLAN Registration (MVR) is designed for applications (such as
Media-on-Demand (MoD)) using multicast traffic across a network. MVR
allows one single multicast VLAN to be shared among different
subscriber VLANs on the network.
This improves bandwidth utilization by reducing multicast traffic in the
subscriber VLANs and simplifies multicast group management.
(R)STP detects and breaks network loops and provides backup links
between switches, bridges or routers. It allows a Switch to interact with
other (R)STP -compliant switches in your network to ensure that only
one path exists between any two stations on the network.
Use the loop guard feature to protect against network loops on the edge
of your network.
ES-2048 User's Guide