Domain names for ISP infrastructure links
Dorian R. Kim
dorian at cic.net
Tue Jan 7 21:45:55 UTC 1997
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 in
> 2. Using an fixed width format as proposed keeps the maximum length (not
> including the domain suffix) short. Assuming 2 digit router/interface
> numbers and a four digit DLCI, the max length is 24 characters. (Even if
> we allow 3 digits to router numbers we max at 29). I would propose to add
> 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 above
> 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 number
> is supposed to mean?
As long as we are going to code router specific things in the DNS, they are
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|pos]
is the 1st sub interface of fastethernet in slot 3, card slot 0, port 0 of um1
router at our Ann Arbor POP.
> 3. How do people feel about putting the speed of the link in the DNS name,
> I have seen one yea and one nay. I am ambivilant, but leaning towards no,
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 willing
That depends on what's agreed on. Beauty is in the eye of the beholder, and so
> 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 done?
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