[netlmm] Review of LMA Discovery document

[Christian Vogt <[e-mail]>]

Folks,

Jouni asked me to review the LMA Discovery document.  I did this, and
found that the document is mature and well written, and should be
progressed further as soon as possible.  I have just one comment on
section 4:

Section 4 gives two classes of reasons not to use the DNS for LMA
discovery.  The first class is related to update propagation latencies
caused by caching.  The second class is related to update latencies
caused by primary-to-secondary server synchronization.  My comment
relates to the first class of reasons:

Can't the issues described be well avoided?  In deployments where the
DNS is to be used for LMA discovery, make sure you have DNS
implementations that accept low TTLs, and set your TTLs low -- that
seems to be it.  I agree that the issues you are describing do need to
be considered, and hence it is very important to document them.  But I
personally don't see them as show-stoppers.

This said, your second class of reasons may be more intractable.

Hope this helps.  Best regards,

- Christian