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Try:
awk '
$3 == "M" {
if(m) print ll, "DOWN"
ll = $0
m = 1
}
$3 == "*" {
print ll, $0
m = 0
}
END { if(m) print ll, "DOWN"
}' "IP FILE"

$ awk 'NF!=9 && NF && !/SDIP/{$0=p FS $0}NF==9{p=$1}1' file

Are you on Solaris?

Can you change awk to nawk?

EDIT: And please copy the command once more, I updated it with an extra space so the formatting is correct.

Try :

$ awk '{split($2,S,":");split($4,E,":");print $0, ((S[1]*3600+S[2]*60+S[3])-(E[1]*3600+E[2]*60+E[3]))/3600}' file
2013-11-23 15:51:23 2013-11-23 12:20:06 BRC023 CG 3.52139
2013-11-23...

Try something like:
awk 'sub("A1/EXT ",x){ p=$0 } /MO/{getline; p=p OFS $1 OFS $2} /EXTERNAL ALARM/{while(getline && NF) p=p OFS $0; print p}' file
Or
awk '/A1\/EXT/{ p=$2 OFS $3 OFS $4 OFS $5 }...