PRELIMINARY
Technical Description
14076
Metro
Ethernet
Network
Customer
Edge
Customer
Edge
Figure 11 EPLAN
EPLAN is a port level service so there is no need for the customer and provider
to negotiate things like VLAN to be used. The mapping of C-VLAN to EVC can
be one to one or all to one. Frames that arrive at the UNI with C-VLAN ID
not recognized by the service provider are dropped at the UNI. The following
functions are supported to implement EVPL:
• Basic error checking of the Ethernet frames is performed (for example,
checking FCS, wrong Ethernet format, undersized packets or oversized
packets).
• Rate limiting is used to police the ingress Ethernet traffic from the
different subscribers to make it possible to meet the agreed Service Level
Agreements (SLA).
•
Drop non-conforming traffic or remark them with lower priority.
• Priority is used to make it possible for high priority packets to bypass low
priority packets in the buffers.
4.3.5 Ethernet Virtual Private LAN
The Ethernet Virtual Private LAN (EVPLAN) provides LAN-type connectivity
between multiple subscriber sites through multiplexed UNIs. With a multiplex
UNI, a particular customer site has access to multiple EVCs with that single
UNI. The different EVCs one can access at a particular UNI can be routed to
different parts of the network independently.
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1/22102-HRA 901 17/9 Uen PU1 | 2016-07-04
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