Subject: [Sipping] SIP one DNS domain much IP

From: "孙永光" <[email-masked]>
Date: Tue, 20 May 2008 19:10:35 +0800

Hi Guys:

     I have a question about DNS
it is that one DNS domain has much IP Addrs , eg: as.test.net=>(
192.168.2.1/192.168.2.2)
and "as.test.net: is B2B server
1) A INVITE B , A resolves the DNS "as.test.net" 192.168.2.1,then A sends
INVITE request to
   192.168.2.1
2) A receives 200 response with contact "as.test.net" and no record route
3)A resolves the DNS "as.test.net" again, it gets 192.16.2.2 and sends ACK
to 192.168.2.2

now the 192.16.2.1 can't recieve the ACK request , so the session can't be
created

Anyone can give me any advice, or some RFC/draft about it

Thanks in advance

Samman
2008-5-20
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