Running RPL with border router

[Adila]

Hi,

I was trying to run a unicast sending to the border router (RPL root) with a few nodes to check RPL tree.

I had node 1 as the border router and node 33, 31, and 6 as the unicast sender nodes. I ran it for 10 minutes to see if RPL been formed as expected.

From the connectivity map, using these nodes, it should be connected as: 

1---33---31

       |

       6

but the tree does not form like that; it only gotten to 1---33.

When I try with more nodes, some nodes will be included in the RPL tree while some didn't.

Is this suppose to happen?

I was running this using the default code in Contiki

Thanks,

Adila

[Adila]

anybody else got this problem?