PRELIMINARY
Radio Link Functions
Multi-Layer Header Compression
To further increase the frame rate over the radio link, Multi-Layer Header
Compression (MLHC) is used on the Ethernet frame. Fields in the header are
converted to a hash number, potentially resulting in a significant reduction in
the size of the frames sent over the radio link.
The MLHC algorithm inspects the header for Ethernet, IPv4, IPv6, UDP, MPLS
(up to three MPLS labels) and MPLS pseudowire information. See Table 1 for
examples of traffic throughput gain (in percent) for different frame types and
frame sizes when using MLHC:
Table 1 Traffic Throughput Gain for Different Frame Types when using MLHC
Frame Size (Bytes)
Frame Type
64 128 512
1500
Eth+S-tag+C
-tag
42% 18%
4% 1%
Eth+S-tag+C
-tag+IPv4+U
DP
143% 43%
8% 3%
Eth+S-tag+C
-tag+IPv6+U
DP
N/A
88%
13% 4%
Eth+ MPLS+I
Pv4
89% 32% 7% 2%
Eth+C-tag+S
-tag+3*MPLS
+L2 PW
278% 61% 10% 3%
Eth+C-tag+S
-tag+3*MPLS
+L3 PW
N/A
100% 14% 4%
3.4 Radio Link Compatibility
MINI-LINK 6351 is only hop compatible with another MINI-LINK 6351.
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