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6in4 — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/6in4
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-06T19:35:49.122Z
SHA-256 of the archived text: dcf492a055533595d89433263acd22f52145ff2a99c13a6ab19141a0575e08dc
Stable URL of this page: https://metraipolis.com/documento/dc_12cedaa02ff4

How to cite

6in4 — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/6in4 (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_12cedaa02ff4 (Metraipolis archive dc_12cedaa02ff4, sha256 dcf492a055533595d89433263acd22f52145ff2a99c13a6ab19141a0575e08dc)

BibTeX

@misc{dc12cedaa02ff4,
  title = {6in4 — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/6in4},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_12cedaa02ff4; sha256 dcf492a055533595d89433263acd22f52145ff2a99c13a6ab19141a0575e08dc},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/6in4. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

6in4, sometimes referred to as SIT, is an IPv6 transition mechanism for migrating from Internet Protocol version 4 (IPv4) to IPv6. It is a tunneling protocol that encapsulates IPv6 packets on specially configured IPv4 links according to the specifications of RFC 4213. The IP protocol number for 6in4 is 41, per IANA reservation. The 6in4 packet format consists of the IPv6 packet preceded by an IPv4 packet header. Thus, the encapsulation overhead is the size of the IPv4 header of 20 bytes. On Ethernet with a maximum transmission unit (MTU) of 1500 bytes, IPv6 packets of 1480 bytes may therefore be transmitted without fragmentation. 6in4 tunneling is also referred to as proto-41 static because the endpoints are configured statically. Although 6in4 tunnels are generally manually configured, the utility AICCU can configure tunnel parameters automatically after retrieving information from a Tunnel Information and Control Protocol (TIC) server. The similarly named methods 6to4 or 6over4 describe a different mechanism. The 6to4 method also makes use of proto-41, but the endpoint IPv4 address information is derived from the IPv6 addresses within the IPv6 packet header, instead of from static configuration of the endpoints.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «6in4» — https://en.wikipedia.org/wiki/6in4
Wikidata Q16464: «meccanismo di transizione interprotocollo su internet» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q16464
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/6in4?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1338813928, consultata il 2026-11-06T19:30:10.443Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 0e98c673bf7f84e6b8c7ff4ee284a9cd8b724efa0e9f77dfd28fb5cc60081e26