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Appendix A Product Specifications
Table 98 Feature Descriptions
FEATURE
VLAN
MAC Address Filter
DHCP (Dynamic Host
Configuration Protocol)
IGMP Snooping
Differentiated Services
(DiffServ)
Queuing
Port Mirroring
Static Route
Multicast VLAN Registration
(MVR)
STP (Spanning Tree
Protocol) / RSTP (Rapid
STP) / MSTP (Multiple STP)
Loop Guard
IP Source Guard
Link Aggregation
Port Authentication and
Security
Authentication and
Accounting
238
DESCRIPTION
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 relay DHCP requests to DHCP servers on
your network.
The ONU 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 ONU.
With DiffServ, the ONU 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) and Weighted Round Robin (WRR). This allows
the ONU 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 ONU 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 ONU 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. The ONU also
allows you to set up multiple STP configurations (or trees). Ports can
then be assigned to the trees.
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 ONU 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 ONU.
The ONU supports authentication and accounting services via RADIUS
and TACACS+ AAA servers.
ONU User's Guide
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