Collocations for perimeter - noun

inner, outer
northern, southern, etc.
entire
defensive, security
airport, base

establish, form, mark
The river marks the eastern perimeter of our land.

defend, guard, secure
patrol, walk
breach
The gunman did not breach the security perimeter around the White House.

fence, fencing, wall
security
road
defender, player, shooter (all in basketball)

along the perimeter
I lugged my suitcase along the perimeter of the square.

around the perimeter, round the perimeter (esp. BrE)
We walked around the perimeter of the prison.

inside the perimeter, outside the perimeter
They demonstrated just outside the perimeter of the embassy.

on the perimeter
Many of the offices are located on the perimeter of the site.