NTK_RFC 0001

Subject: Gnode contiguity

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This text describes a change to the Npv7 about the collision of IPs. It will be included in the final documentation, so feel free to correct it. But if you want to change the system here described, please contact us first.

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A collision of IPs happens when two gnodes with the same ID are born separately, so when they meet each trough a direct link or trough other nodes many problems arise since there are some ambiguities:

• - In the first case there can be nodes which have the same IP. - In the second:

  • A <-> B <-> D <-> A

  • After a qspn_round the node B will have two routes to reach the gnode A. But in this case the gnode A isn't a contiguous gnode, so when B wants to reach a node which belongs to A, it will send the packet using only one route which may lead to the A gnode which hasn't the wanted node.

So these are the real problems. In order to solve them it is necessary that every time two gnodes meets each other for the first time, one of them will redo the hook, in fact, this was the cause of all. When a gnode meets for the first time another gnode is like when a new node joins the network: it hooks with the other nodes. The same must be done for the gnode.