krauskpf@uxe.cso.uiuc.edu (01/01/88)
Trying to clear up a mistaken note about Kinetics use of zones:
I used "zones" when I should have said "networks" and I was referring only
to the problem of crossing bridges with NCSA Telnet. Kinetics supports
zones for AppleTalk services fully. Here is the story about the TCP/IP
side.
Once we get a zone,network,node address for the FastPath, NCSA Telnet can
use any interconnection to get to a FastPath. The problem comes when we
try to find a FastPath to use.
How can NCSA Telnet find the FastPath?
1. A local-zone NBP query. This can cross bridges, but not zones. NBP is
the best way to find a gateway. Currently supported for the KIP
gateway only. Kinetics "combined" gateway does not support NBP. Kinetics
has suggested that NBP may be a part of future gateway software but they
have not announced that it will be so.
If you have interbridges and the KIP gateway in the FastPath, this
should work. We have not tested this on site. Anyone want to confirm?
2. An all-zone NBP query. Do you really want this type of broadcast query
to go to all zones? We currently do not support this.
3. A DDP broadcast on the local network with an encapsulated ARP packet
(this being an ARPANET type of ARP). Currently supported for Kinetics'
gateway software. DDP broadcasts do not cross bridges, so this cannot
find a FastPath across a bridge. We would rather use NBP.
I hope this explains what does and doesn't work.
Tim Krauskopf timk@ncsa.uiuc.edu (ARPA)
National Center for Supercomputing Applications 14013@ncsavmsa (BITNET)