Peer
Shared compile-time constants used across the peer state machine: multicast transport parameters, datagram framing limits, and beacon rate limiting.
Values are frozen: changing any of them without coordinated updates to every running Krill node in a swarm will partition the swarm (new nodes will not see old nodes and vice versa).
Properties
Minimum time between successive beacons from the same source, in milliseconds. Enforced at the emit side to prevent a misbehaving node from flooding the multicast group.
Maximum datagram size (in bytes) the beacon receivers are willing to buffer. Sized well above a typical beacon payload; packets larger than this are silently truncated by the socket.
IPv4 multicast group used by Krill beacons.
UDP port on which beacons are emitted and listened for.
IP multicast TTL for beacon packets. Set to 1 so beacons never cross a router — Krill discovery is LAN-scoped by design.