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Re: Domain names for ISP infrastructure links
From: "John W. Stewart III" <jstewart () metro isi edu>
Date: Tue, 07 Jan 1997 17:25:12 EST


conventions are fine

and it's helpful to users and operators alike for names to
contain a fair amount of information

but "standardizing" with fixed-width fields, pop codes,
next-hop router, etc. doesn't seem that productive when
providers are gonna do what they want anyway.  better to
encourage them to include certain information in their
names than specify how to spell DC

my US$0.02

/jws

p.s.  as for recording the next-hop router, what happens
on a lan? and what about an atm interface over which many
vcs run?

Dorian R. Kim supposedly said:

On Tue, 7 Jan 1997, Philip J. Nesser II wrote:

1.  I really like the addition of the final pop-router combo so its easy
 to
follow connections.  This has been missing in other suggestions so I am
curious as to what others think.

I'm puzzled. Connections go from router to router. How does it help to say
routerb-x-y-z-routerc.blah.net when routerc will show up as the next hop i
n

the traceroute?

True, but as was pointed out at the last NANOG, sometimes routes change in
the middle of traceroute, and seeing where the next hop should be and where
it actually goes is more apparent if its encoded on the DNS name.  I
certainly can live without it if people don't like it, but for me it seems
like the right thing to do.


2.  Using an fixed width format as proposed keeps the maximum length (no
t
including the domain suffix) short. Assuming 2 digit router/interface
numbers and a four digit DLCI, the max length is 24 characters.  (Even i
f
we allow 3 digits to router numbers we max at 29).  I would propose to a
dd
a little more information in the form of 1 letter types in from of the
numbers (like a 'd' before the DLCI number).  Looking at the example abo
ve
is marginally okay because all field are present but what if there was
either no subinterface or no DLCI, how would you tell what the last numb
er
is supposed to mean?

As long as we are going to code router specific things in the DNS, they ar
e
going to be a wide variety of thing to indicate.

We use the following scheme.

<routername> - <interface  designation> <slot number> - <card slot number>
 
[<port number> [s <sub-interface number>].<pop>.cic.net.

where interface designation is [fddi|hssi|ser|ether|fastether|atm|token|po
s]
i.e.

um1-fastether3-0-0s1.ann-arbor.cic.net


Could we agree on a fixed width interface designation?  fe instead of
fastether?  tk instead of token?  etc..

3.  How do people feel about putting the speed of the link in the DNS na
me,
I have seen one yea and one nay.  I am ambivilant, but leaning towards n
o,

Speed of the link is not important IMO.

4. Are people actually interested in pursuing this formally?  If a spec 
was
written would you change your DNS names to conform?  Would you be willin
g

That depends on what's agreed on. Beauty is in the eye of the beholder, an
d so
are names.

to set up a formal registration process with the IANA for 2(or 3) letter
pop codes to be consistant?

If you wanted that, why not take the airport codes as many have already do
ne?



Agreed, which is why I wanted to increase to 3 letter codes, but we need to
make allowances for special places like the NAPS and the MAE's, which
deserve their own pop codes.

-dorian


--->  Phil

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