Pascal Thubert (pthubert) a écrit :
Let me first describe one-interface routers as I understand are
proposed
in 6LoWPAN:
+------------------------+---------------+ |
| | 2001:db8:1::1/128 2001:db8:1::2/128
2001:db8:1::3/128 _|eth0 _|eth0 _|eth0
|R1 | |R2 | |R3 | ---
--- ---
R1 sends an IP packet to R3 but this reaches only R2. R2 picks
the packet, looks at the dst address, finds it's not for self,
consults routing table, finds a host-based route and sends it to
R3. This can work ok.
Exactly, you pictured this nicely. This is how LoWPAN Routing
works. I'll get back to the definition of that in your other
thread.
Note that over the Ethernet backbone shown here, if R1 and R3 are
edge routers then R1 will reach R3 directly.
The dashed lines are actually the wireless link(s) not the backbone
wired link...
This will happen because R1 still has a connected route
2001:db8:1::/64 over the backbone, and it will use RFC 4861 to locate
R3 there. The binding table will be consulted first but that will
fail because R3 is not a 6LoWPAN node registered to R1. Very much
like a Home Agent operation on a Home link if you wish.
Seems as a distinguishing point which should be mentioned in the Edge
Router discussion... if I udnerstand it correctly.
Alex
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