pub const ESTABLISHED_ROUTE_EXTRA_HOPS: u8 = 1;Expand description
Flood-hop slack granted on top of what an established route to a peer already needs.
A route learned from inbound traffic tells the sender how far away the peer was, so a unicast that follows it does not need the wide flood budget of a first-contact packet. Sending with exactly the route’s own cost would make every stale route fail outright, so sends keep this much extra budget: a path that has grown one hop longer — a repeater moved, a link that now needs one more relay — still gets through and re-teaches the correct route.