Subject: [Mipshop] FMIPv6 - NAACK option with IP address

From: Subba Reddy <[email-masked]>
Date: Thu, 22 Sep 2005 16:52:59 +0530

Hi,

    From Sec 4 (page 14) of the spec,

"  If the MN receives a Router Advertisement with a NAACK option, it
   *MUST* use the IP address, if any, provided in the NAACK option."
    
    From Sec 6.4.5 (page 36) of the spec,

"The MN *SHOULD* use the NCoA if it is supplied with the NAACK 
option."

Which one is correct *MUST* or *SHOULD*?

Thanks & Regards,
Subba Reddy
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