Exponential backoff in BGP reconnects

[danderson]

Is this a bug report or a feature request?:

Feature request

What happened:

Right now if you're connecting to a misconfigured BGP peer, metallb retries the connection every 2s.

Most BGP implementations implement error backoff, where if the session errors out, they will blindly refuse any new connection attempts for N seconds, to avoid overloading their flimsy CPUs with broken BGP sessions.

This means that if you try connecting metallb to a misconfigured peer, the logs will show the "real" error once, followed by 1-3 minutes of "reading from peer: EOF" errors as metallb keeps retrying.

What you expected to happen:

The logs should do a better job of highlighting the real error.