Re: Last Call: <draft-ietf-tcpm-undeployed-03.txt> (Moving Outdated TCP Extensions and TCP-related Documents to Historic and Informational Status) to Informational RFC

[Philip Homburg <[e-mail]>]

In your letter dated Mon, 04 Jan 2016 15:53:50 -0500 you wrote:
>The draft says in section 2.1:
>
>   o  [RFC1078] U, "TCP Port Service Multiplexer (TCPMUX)" should be
>      deprecated, because:
>....
>      *  There are no known client-side deployments.

Just for reference. I use TCPMUX for a private protocol. It is nice for
prototyping because it is easier pick a unique string for a protocol than
to pick un unused port.

(Obviously, when DNS is used, SRV can also be used for this)

The second argument is a weird. 
      *  It requires all new connections to be received on a single
          port, which limits the number of connections between two
	  machines."

There are many systems that receive essentially all of their traffic over 
one port. So those system already have this problem. It also is very rare
that a single host connects to a remote host more than 16000 times
in parallel. So I wonder if this is a practical limitation.