ZyXEL Communications ZyXEL Dimension ES-4124 User Manual page 437

Table 150 Firmware Specifications
FEATURE
Multicast VLAN Registration
(MVR)
IP Multicast
RIP
OSPF
DVMRP
VRRP
STP (Spanning Tree
Protocol) / RSTP (Rapid
STP)
Loop Guard
IP Source Guard
Link Aggregation
Port Authentication and
Security
Authentication and
Accounting
Device Management
Port Cloning
Syslog
ES-4124 User's Guide
DESCRIPTION
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.
With IP multicast, the Switch delivers IP packets to a group of hosts on
the network - not everybody. In addition, the Switch can send packets to
Ethernet devices that are not VLAN-aware by untagging (removing the
VLAN tags) IP multicast packets.
RIP (Routing Information Protocol) allows a routing device to exchange
routing information with other routers.
OSPF (Open Shortest Path First) is a link-state protocol designed to
distribute routing information within an autonomous system (AS). An
autonomous system is a collection of networks using a common routing
protocol to exchange routing information. OSPF is best suited for large
networks.
DVMRP (Distance Vector Multicast Routing Protocol) is a protocol used
for routing multicast data within an autonomous system (AS). DVMRP
provides multicast forwarding capability to a layer 3 switch that runs both
the IPv4 protocol (with IP Multicast support) and the IGMP protocol.
Virtual Router Redundancy Protocol (VRRP), defined in RFC 2338,
allows you to create redundant backup gateways to ensure that the
default gateway of a host is always available.
(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.
Use IP source guard to filter unauthorized DHCP and 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.
Appendix A Product Specifications
437