Sunrise telecom XTT 5000, User Manual

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XTT 5000 User's Manual
Technology: Ethernet IPG Home
The gap of time between the end of one frame and the start of the preamble for the
next frame is called the inter frame gap (IFG); the delay between successive frames.
IFG.
IFG
Because most Ethernet traffic carries IP packets, the IFG is often called the IPG
(Inter Packet Gap). In fact, the terms packet and frame tend to be used
interchangeably by users even though they refer to very distinct entities.
The minimum IFG is 12 bytes, or 96 bit-times. The minimum IFG thus depends on
the interface rate, as follows:
Interface Bit Time Minimum IFG
10M 100.0 ns 9.6 s
100M 10.0 ns 0.96 s
1G 1.0 ns 96.0 ns
10G 0.1 ns 9.6 ns
Minimum IFG
To improve efficiency, some network elements support frame gaps lower than 12
bytes, but the non-standard implementation is not wide-spread and not generally
recommended.
Frame Size Efficiency
VLAN Tagging
MPLS
MAC Addresses
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Ethernet Frames
Ethernet Overview
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