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6.1
Ethernet Functional Flow in MINI-LINK PT 2010
6.1.1
Supported Frame Sizes
In a real network there will often be Ethernet frames of different sizes. The
size of a frame is often related to the application. A real time application (for
example, voice, video) that requires minimum latency typically uses small
Ethernet frames, while a data application with non real-time characteristics
uses the maximum frame size. MINI-LINK PT 2010 is well equipped to handle
both small and large Ethernet frames as well as a mix.
An Ethernet over Packet Link WAN port supports frames with a size up to
9,216 byte (Jumbo Frames).
6.1.2
Supported Frame Types
MINI-LINK PT 2010 supports multicast, unicast, and broadcast frames.
6.1.3
Priority Classification
The main objective of the priority classification/tagging process is to establish
a frames relative priority to offer appropriate propagation in the network and
internally in MINI-LINK PT 2010.
Definitions
To set the stage for the coming discussions in this chapter some terms must
be clarified.
Trusted Port
In MINI-LINK PT 2010 there are different criteria that come into play when a
frame is prioritized. First of all the operator must decide whether the connected
user domain is trusted or not. For a trusted domain the operator can reuse the
priority information in the frame, set by the client. For an untrusted port the
default network priority value is used.
User/customer and Network Domains
A frame's actual priority in an end to end Ethernet connection can be different
based on where in the network you look. A network can be logically split up in a
network domain and one or more user/customer domains. All nodes in an area
has a similar congestion behavior. In the user/customer domain, an Ethernet
frame's priority settings are based on the individual user/customer definitions
and referred to as user/customer priority. In the network domain the network
priority settings, defined by the operator, are used.
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MINI-LINK PT 2010 Functions – Ethernet
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