{
  "draft": null,
  "doc_id": "RFC1191",
  "title": "Path MTU discovery",
  "authors": [
    "J. Mogul",
    "S. Deering"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "19",
  "pub_status": "DRAFT STANDARD",
  "status": "DRAFT STANDARD",
  "source": "Legacy",
  "abstract": "This memo describes a technique for dynamically discovering the maximum transmission unit (MTU) of an arbitrary internet path.  It specifies a small change to the way routers generate one type of ICMP message.  For a path that passes through a router that has not been so changed, this technique might not discover the correct Path MTU, but it will always choose a Path MTU as accurate as, and in many cases more accurate than, the Path MTU that would be chosen by current practice. [STANDARDS-TRACK]",
  "pub_date": "November 1990",
  "keywords": [
    "IP-MTU"
  ],
  "obsoletes": [
    "RFC1063"
  ],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC1191",
  "errata_url": null
}