Subject: mdns off-segment name conflict

From: erik guttman <[email-masked]>
Date: Wed, 04 Jul 2001 05:16:23 -0700

>   | Justification: Need additional text addressing name conflict scenarios
>   | in multihomed hosts
>
>   |      ----------  ----------
>   |       |      |    |     |
>   |      [A]    [myhost]   [A]
>   |
>   |
>   |    Figure 2. Off-segment name conflict
>   |
>   | If host myhost is configured to use mDNS on both interfaces,
>   | it will send mDNS queries on both interfaces.
>   | When host myhost sends a query for the host RR for name "A"
>   | it will receive a response from hosts on both interfaces.
>   | Host myhost will then forward a response from the first responder
>   | to the second responder,
> 
> What?   [<snip>]
> Unless and until we get some experience with this, that shows that one
> approach works best, leaving it implementation defined is best.

I agree with kre.   If myhost uses mdns on multiple interfaces, it 
should be prepared to cope with possible name resolution ambiguity 
in an implementation specific manner.  

To go further than this would require that mDNS do more than use
multicast 
to transport DNS request/reply messages, which I believe would be a
mistake.

Erik

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