Le mercredi 13 juillet 2011 à 15:15 +0100, Alexander Frolkin a écrit : > Hi, > > > Is back-reference, like (.)( \1)*$, provided by the JunOS AS-path > > matching engine? (This should match, for instance, ^6453$, ^6453_6453$, > > ^6453_6453_6453$, and so on...) > > Never tried this, but do you mean something like > > ([0-9]*)( \1)* > > ?
No, in AS-path context, ASNs are the atoms (thus (.) above). > > This works with egrep: > > $ echo 123 123 | egrep '^([0-9]*)( \1)*$' > 123 123 > $ echo 123 124 | egrep '^([0-9]*)( \1)*$' > $ > Yes. mh > > Alex >
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