Visara LINCS Central Control - Manual (Page 163)

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Chapter 14. Online Testing
707024-002
Host Monitor - SNA Trace
Here is an example of an SNA Host Monitor trace screen. A greater than symbol (>) indicates
that the data is coming from the host. A less than symbol (<) indicates that LINCS is generating
the data to send to the host. The data itself is shown in hex, beginning with the SNA TH, and
followed by the RH and RU. The TH consists of the first six bytes of data, the RH consists of
the next three bytes of data, and the remaining data for the frame makes up the RU. The SNA
traces for SDLC, X.25, X.21, Token Ring, Ethernet, and local SNA are the same.
Display Monitor For Host:A LINCS C8.2 Central Control
< 2C00000800000B80008106200C06030001000000
< 2C00000800024B900004082B0000
>
280008000003038000D5C5E3E6D6D9D240E2E8E2E3C5D4E240C2E4E2C9D5C5E2E240C7D9D6
D74B40E5E2C561E5E3C1D440D3D6C7D6D540D4C5D5E440154015404040404040404040404040
4040404040404040404040C6D6D940C1D7D7D3404040404040404040C5D5E3C5D91540404040
40404040404040404040404040404040404040E5D461E2D740F14BF64040404040404040E5D4
154040404040404040404040404040404040404040404040C3C9C3E24040F14BF74040404040
404040C3C9C3E2154040404040404040404040404040404040404040
< 2C000008000387900010070000
> 240008000003404040C4D6C3E240404040404040404040404040C4D6C3E21540404040404040
40404040404040404040404040404040D5C5E3E5C9C5E640F14BF3404040404040D5C5E3E5C9
C5E6154040404040404040404040404040404040404040404040D5C5E3E5C9C5E640C4D44040
4040404040D5C4D4C9D6C61540154015401540154015C5D5E3C5D940D3D6C7D6D57A
> 2C00080000008B8000810620
< 2C00000A00000B80008106200C06010001000000
< 2C00000A00014B90000408310000
> 2C000A0000008B8000810620
PF1-Menu PF8-Forw
Note that for X.25 traces, the SNA frames are the frames which have been reassembled from
data received over the link. (Some SNA frames are divided into smaller packets before sending
over the X.25 link.) These packets, in traversing the network, may get out of order until the
receiving unit reassembles them.