According to Baltimore coach John Harbaugh (via Jeff Zrebiec), the Eagles and Ravens will practice against each other during training camp in the days leading up to their preseason game on Saturday, August 22.
This is a change up from the past two offseasons. The Eagles spent the last two summers practicing against the New England Patriots. In 2013, the Patriots came to Philadelphia. Last year, the Eagles headed up north. This year, it doesn't make sense for the Eagles and Patriots to practice against each other because the two teams are scheduled to meet in Week 13 of the regular season. The Eagles don't play the Ravens this year, so this makes sense.
Harbaugh used to coach for the Eagles so perhaps that's what helped get a deal done here. He was on Philadelphia's coaching staff from 1998-2007 before being hired as Baltimore's head coach in 2008.
Joint training camp practices aren't really a huge deal but they're at least a little interesting. The Ravens have obviously been a good team in recent years so it can't hurt Philadelphia to practice against good competition.
Eagles 2015 preseason schedule - (All games on NBC10)
Week 1 - vs. Indianapolis Colts (Sunday, Aug. 16, 1:00 PM)
Week 2 - vs. Baltimore Ravens (Saturday, Aug. 22, 7:00 PM)
Week 3 - @ Green Bay Packers (Saturday, Aug. 29, 8:00 PM)
Week 4 - @ New York Jets (Thursday, Sept. 3, 7:00 PM)