WG ACTION: 2 weeks to discuss [LL61] Remove initial wait

Please post discussion of this issue to the mailing list over the 
next two weeks
ending May 18, 2004.  In order to accept this issued, we will need a strong WG
consensus given that this is very late in the process.

Please see http://www.drizzle.org/~aboba/ZEROCONF/issues.html for a list of
current issues and their status.

[LL61]

Description of Issue:		Remove initial wait
Submitter Name:                 Stuart Cheshire
Submitter Email Address:        [email protected]
Date first submitted:           04 May 04
Reference:			LL12
Comment Type ['t'ech|'e'dit]:	t
Prio ['S' Must|1 should|2 may]:	S
Section:			2.2.1
Rationale/Explanation:
Lengthy Description:

[Stuart]

>    When ready to begin probing, the host should then wait for a random
>    time interval selected uniformly in the range PROBE_MIN to PROBE_MAX
>    seconds, and should then send NUM_PROBES probe packets, spaced
>    randomly, PROBE_MIN to PROBE_MAX seconds apart.

Why "wait for a random time interval selected uniformly in the range
PROBE_MIN to PROBE_MAX"? What's the benefit of enforcing an initial
one-second delay? It just slows things down.

[Erik]

This delay was intended to stop a set of hosts from beginning at the
same time in a 'LAN power up' situation.  This text has passed all
reviews and numerous WG issues to revise and hone it.

[Stuart]

I was not asking about the [0,1] random interval. That's been there since
draft-05.

I was asking about why it is now 1 + [0,1]. What's the extra fixed
one-second delay for? What is achieved by making the process uniformly
take a second longer than it should?

[Erik]

     Hmm.  Reviewing all records, I can't see how this entered the doc.
     I don't have time for archeology to find out when it entered.  I
     don't see why waiting an extra second helps, except to wait for
     network infrastructure to come up (see ll12).

Requested Change:

Text was:

    When ready to begin probing, the host should then wait for a random
    time interval selected uniformly in the range PROBE_MIN to PROBE_MAX
    seconds, and should then send NUM_PROBES probe packets, spaced
    randomly, PROBE_MIN to PROBE_MAX seconds apart.

Text becomes:

    When ready to begin probing, the host should send NUM_PROBES probe
    packets, spaced randomly, PROBE_MIN to PROBE_MAX seconds apart.