Peering is a relationship. A one-sided relationship is called stalking. All jokes aside, here is an excerpt from the docs:
Peering can be asymmetric or symmetric:
- When symmetric, the connection will be protected by both nodes and will likely
be vary stable. - When asymmetric, only one node (the node that configured peering) will protect
the connection and attempt to re-connect to the peered node on disconnect. If
the peered node is under heavy load and/or has a low connection limit, the
connection may flap repeatedly. Be careful when asymmetrically peering to not
overload peers.