Server behavior - recursive - port unreachable

[Christophe Lermytte]

Hello,

I'm trying to find out what the server behavior should be in the following situation:

client -> server1 -> server2

client asks server1 to recursively resolve a name
server1 does not know and asks server2
server2 sends an ICMP Port Unreachable to server1

Is there something server1 can send to client, instead of making client wait until it gives up?

Thanks,
CL

 		 	   		  
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