ZyXEL Communications ES-2108 User Manual page 252

Appendix A Product Specifications
Table 104 Firmware Specifications
FEATURE
Differentiated Services
(DiffServ)
Queuing
Port Mirroring
Static Route
Multicast VLAN Registration
(MVR)
STP (Spanning Tree
Protocol) / RSTP (Rapid
STP)
MSTP (Multiple Spanning
Tree Protocol)
Loop Guard
IP Source Guard
Link Aggregation
Port Authentication and
Security
Authentication and
Accounting
Device Management
Port Cloning
Syslog
252
DESCRIPTION
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.
Queuing is used to help solve performance degradation when there is
network congestion. Three scheduling services are supported: Strict
Priority Queuing (SPQ), Weighted Round Robin (WRR) and Weighted
Fair Queuing (WFQ). This allows the Switch to maintain separate
queues for packets from each individual source or flow and prevent a
source from monopolizing the bandwidth.
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 tell the Switch how to forward IP traffic when you configure
the TCP/IP parameters manually.
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.
Multiple Spanning Tree Protocol (IEEE 802.1s) is backward-compatible
with STP/RSTP. In MSTP, switching devices are grouped into a region
which appears as a single network to the outside world. With MSTP, a
switch can set up more than one spanning tree. In addition, more than
one VLAN can exist in a spanning tree.
Use the loop guard feature to protect against network loops on the edge
of your network.
Use IP source guard to filter unauthorized ARP packets in your network.
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.
For security, the Switch allows authentication using IEEE 802.1x with an
external RADIUS server and port security that allows only packets with
dynamically learned MAC addresses and/or configured static MAC
addresses to pass through a port on the Switch.
The Switch supports authentication and accounting services via RADIUS
and TACACS+ AAA servers.
Use the web configurator or commands to easily configure the rich range
of features on the Switch.
Use the port cloning feature to copy the settings you configure on one
port to another port or ports.
The Switch can generate syslog messages and send it to a syslog
server.
ES-2108 Series User's Guide