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BSMI Debugging
November 2009 101
BSMI Debugging
The debug output is controlled using the regular mechanisms
provided with the Bfv API. Included in the debug output are
diagnostic strings including BSMI message tracing and network
layer tracing.
BSMI Message Tracing
vtty The vtty program displays layer 2, 3, and 4 messages (depending on
user settings).
Command Syntax
vtty [-m <mod>] {-v]
Included in the debug output is a diagnostic message showing the
message identifier of all messages sent to the firmware from the
application, and all messages sent from the firmware to the
application.
Running a Layer 2 Trace
The diagnostic trace function allows you to trace Layer 2 messages
entering and leaving the framer (See Table 5 on page 111 for
command line syntax). The trace function displays link layer
protocol messages only, such as ISDN Q.931. The trace display
resembles a simple protocol analyzer, with the message type decoded
and its direction shown.
A trace shows Layer 2 messages being passed over the links, and
provides some protocol and routing information. It also displays the
received/transmitted message Information Frame in hexadecimal
format. This hexadecimal string contains Layer 2 ISDN frame
headers.
Arguments
-m <mod> Use specified module (default 2)
-v Turn on Bfv API debugging mode