\section {Commands at a glance}\subsection{Configuration}\begin{verbatim}  : set opt(mac)     Mac/Gprs  set opt(rlc)     RLC  : $ns_ node-config -rlcType $opt(rlc)  :\end{verbatim}  \subsection {Medium Access Control (MAC)}\begin{verbatim}MacGprs set gprs_                 1MacGprs set max_num_ms_           64MacGprs set max_num_freq_         2MacGprs set slot_packet_len_      50MacGprs set gprs_slots_per_frame_ 4MacGprs set rlc_error_            1MacGprs set error_rate_           1000MacGprs set verbose_              0     \end{verbatim}                          \subsection {Radio Link Control (RLC)}\begin{verbatim}RLC set mindelay_    50usRLC set delay_       25usRLC set bandwidth_   0    ;# not usedRLC set debug_       falseRLC set macDA_       0RLC set acked_       1    ;# if 1 acked..0  non-ackedRLC set rlcfraged_   1    ;# if 1-frag.....0-nofragRLC set rlcfragsz_   45   ;# rlc frag sizeRLC set rlcverbose_  0    ;# if 1 print debug info\end{verbatim}                                          \subsection {Link Layer (LL)}\begin{verbatim}LL set mindelay_   50usLL set delay_      25usLL set bandwidth_  0      ;# not usedLL set debug_      false#new parametersLL set acked_      1      ;# 1=> acked ; 0 =>unackedLL set llfraged_   1      ;# 1=>fragmented ; 0=>no fragmentationLL set llfragsz    500    ;# Size of each LL fragmentLL set llverbose_  0      ;# if 1 write debug info into stderr    \end{verbatim}