[HECnet] Johnny: Can you add some new nodes

Sampsa Laine sampsa at mac.com
Fri Aug 10 10:54:30 PDT 2012


On 10 Aug 2012, at 12:52, Johnny Billquist wrote:

Yes, you are incorrect. There is nothing that requires an area here, and it just means you need to deal with a full blown DECnet stack, instead of a simpler endnode.

It might be worth understanding that there is nothing technical added by going to multiple areas. It is just a complication which allows you to have more nodes, but at the cost of more complex routing.

Even within one area, you can have a large number of hops between nodes. Makes no difference to DECnet. The rules for the topological layout is simple:
1. End-nodes needs to be adjacent to atleast one level 1 router.
2. All level 1 routers in an area must be able to talk with all other level 1 routers. And only level 1 routers route messages within an area, which means you cannot have an endnode in the chain.

The layout can be a star, a ring, a line, a combination, hybrid, or whatever. There are absolutely no topology that you can't have.
The type of links can also be anything. Ethernet, multidrop, point-to-point, or something weird. Makes no difference.

Ok, my bad, misunderstood the UDP Mutlinet tunnels :)

Drop that node and add DEB390 with the address 52.600 when you get the chance.

Sampsa



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