Ok, reading the foundry doc's again very carefully, I understad at least
one of the problems - it relates to "overlapping networks":
My two IP transfernets between the NI and RTR1/2 ...
+----SW1----+------+
| | |
UPLINK----NI400 RTR1 RTR2
| | |
+----SW2----+------+
...are subnets of the mysterious /18, so the /18 is a supernet of
directly connected networks from the NI view, e.g.:
- directly connected: 212.79.x/24 (via SW1)
- directly connected: 212.79.y/24 (via SW2)
- supernet route: 212.79/18 -> RTR1/2
The document
http://www.foundrynet.com/services/documentation/diag/CAM-partitioning.html
describes now what will happen in this situation: per default the router
will create /32 CAM entries to every needed destination within the
supernet. But the solution the document suggest makes me not happy
because it seems that the only way to get rid of the bunch of /32s is
the way via software/cpu forwarding for some prefixes.
--
Gerald
