Dear Hesham

Something about prefixes with L=0 are confusing to me. Kindly see
below.  

1. The prefixes with L bit off. 
- The meaning/ purpose of prefixes with L=0 is not exactly clear 
   to me. What's the use of non-on-link prefixes for a node? 

2. The prefixes assigned to more than one links.
- According to RFC 2461, it's legitimate to assign a prefix (with L=0) 
   to two separate links. But it's not clear to me on what condition 
   can we do this.   

 I wish we clarify the above. The prefixes with L=0 makes DNA work 
complicated. Though they are troublesome, I am afriad that, in wireless
environment, we can't avoid them.

Best regards

JinHyeock

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