BGP Peer Restart Backoff Susan Hares, NextHop Technologies

What’s the problem Peer auto-restart causes –Peer to go up/down rapidly –Shakes the infrastructure Cause: –Bad prefix resent by peer –Causes local peer to come up, receive back junk, and go back down Issue: Was in draft-14 of BGP draft, pulled to separate document

Types of Idle Hold Down Timers 3 types of Timers –Exponential damping (like route flap damping) –Step-wise damping –No damping

Mechanisms Mechanisms exist in FSM –Connect-Retry count –Idle Hold Timer –Perform persistent peer oscillation damping action Sub-state within Idle state to –Hold down while Idle Hold timer is running –Allow manual configuration to take out of state

Next Steps Feedback? Accept as working group draft Discussion on list

Any Questions?