D
ESCRIPTION
OF
S
OFTWARE
F
EATURES
1-8
Multicast Filtering – Specific multicast traffic can be assigned to its own
VLAN to ensure that it does not interfere with normal network traffic and
to guarantee real-time delivery by setting the required priority level for the
designated VLAN. The switch uses IGMP snooping or query to manage
multicast group registration; and multicast profile filtering to control
access to specific multicast services. It also supports Multicast VLAN
Registration (MVR) which allows common multicast traffic, such as
television channels, to be transmitted across a single network-wide
multicast VLAN shared by hosts residing in other standard or private
VLAN groups, while preserving security and data isolation for nor mal
traffic.
IEEE 802.1Q Tunneling (QinQ) – This feature is designed for service
providers carrying traffic for multiple customers across their networks.
QinQ tunneling is used to maintain customer-specific VLAN and Layer 2
protocol configurations even when different customers use the same
internal VLAN IDs. This is accomplished by inserting Service Provider
VLAN (SPVLAN) tags into the customer’s frames when they enter the
service provider’s network, and then stripping the tags when the frames
leave the network.