--- tags: ["kovri"] terms: ["Router-Info", "Router-infos"] summary: "A data structure or file which contains an I2P peer's needed network information" --- {% include untranslated.html %} ### The Basics @Router-Info is a data structure (periodically written to a [binary file](https://en.wikipedia.org/wiki/Binary_file)) which contains all needed information to locate, identify, and communicate with an @I2P peer. @Router-Info includes IP address, router identity, other misc. technical details; is needed for @network-database and is published to @floodfill routers. ### In-depth information In human-readable form, Router-Info may look like this: ``` Identity: [RouterIdentity: Hash: nYZ5Qe7gQ-~QgfgJVRUG4c0JnVeVqzM~duUX1EGT1ek= Certificate: [Certificate: type: Key certificate Crypto type: 0 Sig type: 7 (EdDSA_SHA512_Ed25519)] PublicKey: [PublicKey: size: 256] SigningPublicKey: [SigningPublicKey EdDSA_SHA512_Ed25519: size: 32] Padding: 96 bytes] Signature: [Signature EdDSA_SHA512_Ed25519: size: 64] Published: Sun Oct 09 01:34:59 UTC 2016 Options (5): [caps] = [LfR] [netId] = [2] [netdb.knownLeaseSets] = [37] [netdb.knownRouters] = [2435] [router.version] = [0.9.26] Addresses (4): [RouterAddress: Type: SSU Cost: 4 Options (5): [caps] = [BC] [host] = [2a01:e35:8b5c:b240:71a2:6750:8d4:47fa] [key] = [nYZ5Qe7gQ-~QgfgJVRUG4c0JnVeVqzM~duUX1EGT1ek=] [mtu] = [1472] [port] = [22244]] [RouterAddress: Type: NTCP Cost: 9 Options (2): [host] = [2a01:e35:8b5c:b240:71a2:6750:8d4:47fa] [port] = [22244]] [RouterAddress: Type: SSU Cost: 6 Options (4): [caps] = [BC] [host] = [88.181.203.36] [key] = [nYZ5Qe7gQ-~QgfgJVRUG4c0JnVeVqzM~duUX1EGT1ek=] [port] = [22244]] [RouterAddress: Type: NTCP Cost: 11 Options (2): [host] = [88.181.203.36] [port] = [22244]]] ``` ### Notes For details and specification, visit @Java-I2P [Network Database](https://geti2p.net/en/docs/how/network-database) page.