12 Apr
2019
12 Apr
'19
2:39 a.m.
On Apr 11, 2019, at 8:17 PM, Johnny Billquist <bqt
at softjar.se> wrote:
On 2019-04-12 02:02, Paul Koning wrote:
Well, that is obviously not what RSX shows...
And I doubt any system do. Because a node can never have any ideas what nodes are
reachable in other areas. Which is exactly the thing about 23.1023.
But I guess you could claim that 23.1023 is not *known* to be reachable.
Correct, you don't know the topology of other areas.
Here's what the DECnet spec (netman40, the Phase IV network management spec) says.
Node group identifications are as follows:
ACTIVE NODES For a nonrouting node, all nodes that the
executor sees on the other end of a logical
link, or as adjacent, or as designated router.
For an intra-area routing node, all of the
above plus all nodes that the executor
perceives as reachable within its area. For an
inter-area router, all of the above plus all
nodes the executor sees as adjacent inter-area
routers.
ADJACENT NODES All nodes that the executor perceives Routing
can reach and that are physically adjacent
(i.e. separated from the executor by a single
circuit). Each occurrence of a node on a
different circuit appears as a separate
adjacent node. In other words, the adjacency
of a node is qualified by the circuit on which
it is adjacent.
KNOWN NODES As defined for ACTIVE NODES, plus all nodes
that have a name, including names that map to a
Network Management as Seen by the User
circuit (i.e., loop nodes).
LOOP NODES All nodes that are associated with a circuit
for loop testing purposes.
SIGNIFICANT NODES All nodes that have significant information
associated with them for display purposes.
paul
On Apr
11, 2019, at 7:45 PM, Johnny Billquist <bqt at softjar.se> wrote:
On 2019-04-12 01:28, Supratim Sanyal wrote:
It might be but it should not be. The DECnet architecture specifies precisely what
the term means.
Start with "active nodes": that means every node known to be reachable.
Given that, "known nodes" is defined as the union of active nodes and named
nodes. So a nameless node is known if it is shown as reachable by routing data (or by
having an active adjacency), but not otherwise. Johnny - if I remember right, I have seen nodes
with no names show up at http://mim.update.uu.se/hecnet without names in brackets, for my
nodes when I haven?t told you to add them yet, or others too. no?
"Known nodes" is a tricky thing. It might also be different for different OSes.