  We explore the supergravity solution of D5-branes intersecting as an
I1-brane. In a suitable near-horizon limit the geometry is in qualitative
agreement with that found in the microscopic open-string analysis as well as
the NS5-brane analysis of Itzhaki, Kutasov and Seiberg. In particular, the
ISO(1,1) Lorentz symmetry of the intersection domain is enhanced to ISO(1,2).
The discussion is generalised to the T-dual configuration of a D4-brane
intersecting a D6-brane. In this case the ISO(1,1) symmetry is not enhanced.
This is true both in the supergravity approximation to the weakly coupled
string theory and to the M-theory limit.
