Falcon R-Class | User Guide
56
Modification
Buttons
You can modify each VLAN Translation mapping in the table using the
following buttons:
: Edits the mapping row.
: Deletes the mapping.
: Adds a new mapping.
Provider Bridges (QinQ)
The use of an extra VLAN header (service provider tag) as part of the Ethernet frame header to
provide differentiation between traffic flows (whether a separate service, or a separate customer) is
common in service provider networks. It extends the notion of bridging from that of bridging
between LAN segments or virtual LANs (defined by traditional VLAN tags), to bridging between
customers or services.
Providers can use the service provider VLAN tag to identify Ethernet traffic that belongs to a specific
Service, and give it the correct treatment (e.g., if the service is more important or time sensitive than
others it can get the right QoS handling).
Falcon RX is designed to serve as an NTU for Metro-Ethernet access applications. Such applications
use the Provider Bridges (802.1ad) standard to enable Ethernet services implementation.
The Provider Edge Bridge inserts a Service Tag (S-Tag) on all frames received from the Customer
network.
This enables implementation of transparent L2 service for high numbers of customers.
Determination of which service to assign a frame to can be based on:
•
Ingress port
–
All frames received on a specific ingress port will be assigned to a single service
(encapsulated with the same
S-Tag
). Such functionality when used for point-to-point service is
defined as EPL (Ethernet Private Line) in MEF specs.
•
Ingress port + C-Tag
–
A frame received on a specific ingress port will be assigned to a service
based on the port and a table that maps the VLAN tag, on the incoming frame (C-Tag) to the
service tag (S-Tag). Such functionality, when used for point-to-point service, is defined as EVPL
(Ethernet Virtual Private Line) in MEF specs.
Private VLANs (PVLANs)
Private VLAN is not actually a VLAN (as per IEEE802.1q) feature, but are based on the source port
mask, which facilitates switch port segmentation. It segregates a selected groups of ports from other
ports on the switch that are not part of the Private VLAN group.
4.6.5.1
Private VLAN Membership Configuration
The Private VLAN membership configurations for the switch can be monitored and modified here.
Private VLANs can be added or deleted. Port members of each Private VLAN can be added or
removed.
Private VLANs are based on the source port mask, and there are no connections to VLANs. This means
that VLAN IDs and Private VLAN IDs can be identical.
Содержание Falcon-RX/812/G/A
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