Subject: [Softwires] Comments on MAP-T

From: "Qi Sun" <[email-masked]>
Date: Fri, 30 Mar 2012 19:22:00 +0800

Dear authors,

After the discussion today at the softwire, I reread the draft and here are some comments. 
Please help me with understanding you well :-)

1, In section 7.4, the 4th paragraph:
Otherwise, the IPv6 destination address (IPv4-translateable address) MUST be derived from
     the received IPv4 destination address per DMR.  The destination port number MUST be unchanged.
 
Considering the IPv6 destination address is derived from the received IPv4 destination address
 per DMR, why the IPv6 destination address is an IPv4-translatable address, not IPv4-converted
 address?

2, In section 7.5
   At the CE, the IPv4 source address MUST be derived from the IPv6
   source address (IPv6-converted address) as per the DMR, or as per the
   FMR.  The source port number MUST be unchanged.

a)      As far as I can see, the “IPv6-converted address” is an IPv4 address converted from an IPv6 address.
    IMHO the expression should be IPv4-converted address, but I’m not sure whether I’m right.
b)      If the IPv6 source address is derived as per FMR, IMHO it should be “IPv4-translatable address”, 
      instead of IPv4-converted address.

   IPv4 Destination Address and Destination Port Number: At the CE, the
   IPv4 destination address MUST be derived from the IPv6 destination
   address (IPv6-translatable address) as per BMR.  The destination port
   number MUST be unchanged.

I’m wondering if the “IPv6-translatable address” is IPv4-translatable address.

3, In section 6.2.1
The IPv6 source and destination addresses MUST then be derived as per Section 6 of this draft, and…..
 
IMHO the super link “Section 6” may be “Section 7”, referring to section 6.4.1 and 6.4.2. Did I understand right?
 
There is a same super link in section 6.2.2.

Please correct me if I misunderstood anything.
 
Best Regards!

Qi Sun