ZyXEL Communications ms-7206 User Manual page 26

Chapter 2 MM-7201 Specifications
Table 4 Feature Descriptions (continued)
FEATURE
IGMP Snooping
Differentiated Services
(DiffServ)
Classifier and Policy
Queuing
Port Mirroring
Static Route
Port Cloning
Multicast VLAN Registration
(MVR)
IP Multicast
RIP
OSPF
DVMRP
VRRP
RSTP (Rapid Spanning
Tree Protocol) / MRSTP
(Multiple RSTP)
26
DESCRIPTION
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.
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.
You can create a policy to define actions to be performed on a traffic flow
grouped by a classifier according to specific criteria such as the IP
address, port number or protocol type, etc.
Queuing is used to help solve performance degradation when there is
network congestion. Two 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.
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.
Port cloning allows you to copy attributes from one port to another port or
ports.
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.
RSTP detects and breaks network loops and provides backup links
between switches, bridges or routers. It allows a switch to interact with
other RSTP -compliant switches in your network to ensure that only one
path exists between any two stations on the network. MRSTP allows you
to configure multiple RSTP configurations and assign ports to each tree.
MS-7206 Hardware Installation Guide