We study two aspects of M5-branes in N=6 U(N)xU(N) Chern-Simons gauge theory.
We first examine multiple M2-branes ending on a M5-brane. We study Basu-Harvey
type cubic equations, fuzzy funnel configurations, and derive the M5-brane
tension from the N=6 theory. We also find a limit in which the above M2-M5
system reduces to a D2-D4 system and we recover the Nahm equation from the N=6
theory. We then examine domain wall configurations in mass-deformed N=6 theory
with a manifest SU(2)xSU(2)xU(1) global symmetry. We derive tensions of domain
walls connecting between arbitrary M5-brane vacua of the deformed theory and
observe their consistency with gravity dual expectations.Comment: 15 pages, Latex. v2: typos fixed, reference added. v3: Journal
version in JHE