Hello,
I have a question about the Router Advertisement (RA) packets described in
draft-ietf-6lowpan-nd-18.
As I figure out, the RA packets are built like this :
RA header + SLLAO + ABRO + ( PIO + 6CO ) * number_of_prefixes
With one prefix, the sum of the header / options length is equal to 104 bytes.
Here is the detail :
RA : 16 bytes
SLLAO : 16 bytes
ABRO : 24 bytes
PIO : 32 bytes
6CO : 16 bytes
--------------
104 bytes
However, in 802.15.4 the maximum length of the payload is 102 bytes (127 bytes
- 25 bytes for the MAC header). Which means that every RA packet have to be
fragmented before being sent to the MAC layer.
Is my reasoning correct ?
Regards,
--
Damien ROTH - PhD student
Strasbourg University, France
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