AMX NXA-ENET8-2POE Operation/Reference Manual page 46

Using the Web Console
NXA-ENET8-2POE Key Features (Cont.)
IEEE 802.1Q
Tunneling (QINQ)
Traffic Prioritization
Qualify of Service
Link Layer Discovery
Protocol
Multicast Filtering
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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.
Queue mode and CoS configured by Ethernet type, VLAN ID, TCP/UDP port, DSCP,
ToS bit, VLAN tag priority, or port.
The NXA-ENET8-2POE prioritizes each packet based on the required level of ser-
vice, using four priority queues with strict or Weighted Round Robin queuing. It uses
IEEE 802.1p and 802.1Q tags to prioritize incoming traffic based on input from the
end-station application. These functions can be used to provide independent priori-
ties for delay-sensitive data and best-effort data.
The NXA-ENET8-2POE also supports several common methods of prioritizing layer
3/4 traffic to meet application requirements. Traffic can be prioritized based on the
priority bits in the IP frame's Type of Service (ToS) octet or the number of the TCP/
UDP port. When these services are enabled, the priorities are mapped to a Class of
Service value by the switch, and the traffic then sent to the corresponding output
queue.
The NXA-ENET8-2POE supports Differentiated Services (DiffServ), and DSCP
remarking.
Differentiated Services (DiffServ) provides policy-based management mechanisms
used for prioritizing network resources to meet the requirements of specific traffic
types on a per-hop basis. Each packet is classified upon entry into the network
based on access lists, DSCP values, or VLAN lists.
Using access lists allows you select traffic based on Layer 2, Layer 3, or Layer 4
information contained in each packet. Based on network policies, different kinds of
traffic can be marked for different kinds of forwarding.
Used to discover basic information about neighboring devices
Supports IGMP snooping and query, MLD snooping, and Multicast VLAN Registra-
tion.
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 and Query to manage multicast group registration
for IPv4 traffic, and MLD Snooping for IPv6 traffic. It also supports Multicast VLAN
Registration (MVR) which allows common multicast traffic, such as television chan-
nels, 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 normal traffic.
NXA-ENET8-2POE Gigabit Ethernet Layer 2 PoE Switch