As you can see by the map above, Israel was well on its way to cutting off and isolating the Egyptian army on the east side of the Suez Canal. This was made possible by a daring crossing of the Gulf of Suez on the south end and a rapid advance northward of the Israeli army.
Had the UN not stepped in to bring about a cease fire and effectively restore the status quo from the end of the Six Day War, it is likely the Israeli army would have controlled both side of the Suez Canal for its entire length. In such case, Israel would have likely guaranteed safe repatriation of the isolated Egyptian army on the east side of the Suez in return for territorial control over the west side of the Suez.
The UN intervened, of course, to prevent just such an outcome.