Reboosting the International Space Station after shuttles go?

Shuttles and Soyuzes both boost the ISS a few miles higher to overcome
the drag of the wisps of atmosphere. But after 2010, or maybe a bit of
2011, the shuttles will be no more.
How much of a boost can a Soyuz give the station as opposed to the
Shuttle?

Oneandonly1 wrote:
Shuttles and Soyuzes both boost the ISS a few miles higher to overcome
the drag of the wisps of atmosphere. But after 2010, or maybe a bit of
2011, the shuttles will be no more.
How much of a boost can a Soyuz give the station as opposed to the
Shuttle?

No Soyuz has ever boosted ISS.

Progress and ATV currently provide reboost and will continue to do so
after shuttle retirement, along with the SM main engines as required
(though the Russians want to minimize start cycles on those engines, and
they have been troublesome in the past).