RFC 104 UNKNOWN ARPANET · LINKS · MEASUREMENT

Link 191

A one-paragraph note that sets aside link 191 on the early network for measurement work.

RFC EDITOR

Postel, J. and C. Crocker, "Link 191", RFC 104, DOI 10.17487/RFC0104, February 1971, <https://www.rfc-editor.org/info/rfc104>.

BIBTEX

@misc{rfc104,
  series = {Request for Comments},
  number = 104,
  howpublished = {RFC 104},
  publisher = {RFC Editor},
  doi = {10.17487/RFC0104},
  url = {https://www.rfc-editor.org/info/rfc104},
  author = {J. Postel and C. Crocker},
  title = {{Link 191}},
  pagetotal = 1,
  year = 1971,
  month = feb,
}

PUBLISHED: February 1971
AUTHORS: J. Postel, C. Crocker
STREAM: Legacy
RESERVED LINK: 191
INCORRECT EARLIER FIGURE: 223
PURPOSE: Measurement use
DOI: 10.17487/RFC0104

RFC text

Original text · RFC Editor View on rfc-editor.org ↗

NIC # 5768                                             J. Postel
                                                       C. Crocker
Network Working Group                                  UCLA
Request for Comments: #104                             Computer Science
                                                       25 February 71

                                Link 191

At the Network meeting at the University of Illinois, it was agreed to
reserve a link for use in measurements. The link chosen was the highest
unassigned link which was incorrectly calculated to be number 223. The
correct number is 191. Therefore, Link 191 will be assigned for
measurement use. Use of this link should be cleared with the Liasion
Officer at the Network Measurement Center (NMC).

       [ This RFC was put into machine readable form for entry ]
        [ into the online RFC archives by Thomas Nielsen 4/97 ]

AI ELI5

On this page

PROBLEMThe Network meeting at the University of Illinois agreed to reserve one link for measurements, and the number first worked out for it was wrong.

MECHANISMThe RFC corrects the number: the highest unassigned link is 191, not the 223 that was miscalculated, and link 191 is assigned for measurement use.

WHAT TO DOAnyone wanting to use the link has to clear it with the Liaison Officer at the Network Measurement Center (NMC).

§1A Link Set Aside for Measurement

At the Network meeting at the University of Illinois, it was agreed to reserve a link for use in measurements. The link chosen was the highest unassigned link.

The note is dated 25 February 1971 and comes from J. Postel and C. Crocker at UCLA Computer Science. It is a single paragraph with no protocol detail.

The grown-ups at a meeting agreed to save one numbered slot for measuring things. This note says which number.

§2Correcting the Number

The link chosen was the highest unassigned link, which was incorrectly calculated to be number 223. The RFC states that the correct number is 191.

Therefore link 191 is assigned for measurement use. The RFC does not explain how the 223 figure was reached, only that it was wrong.

Someone did the counting wrong and said 223. The right answer is 191, so that is the locker that is saved.

§3Getting Permission to Use It

Use of this link should be cleared with the Liaison Officer at the Network Measurement Center (NMC). The note gives no other rules about what may be sent on the link or how.

If you want to use locker 191, you have to ask the person in charge of measuring first.