beach@DDNUVAX.AF.MIL (darrel beach) (07/11/90)
Now that implementation of GOSIP are appearing, or at are claimed, on certain vendor's shelves, I have a question or two maybe someone can answer. We've finally reached a point in tcp/ip where most (not all by any means) can support DNS and host tables are fading away. Now comes GOSIP (with its 3 versions thus far). It looks like at least for the near future, the mapping between OR (originator/recipient) addresses to some particular NSAP address is table driven, at least until directory services is fully implemented by all. Is this true, or have I missed something?? There also seems to be the beginning of a plethora of so called gateways to get from smtp based mail systems to X.400 based systems, and might add full suite GOSIP x.400. Now just how the heck you map some particular X.400 address to some particular user@host internet address seems a little dicey. From what I've seen, it looks like another big table to do the mapping. Has anybody implemented one of these beasts and knows the definitive answer?? ciao, Darrel Beach
poole@chx400.switch.ch (Simon Poole) (07/11/90)
In article <CMM.0.88.647647249.beach@ddnuvax.af.mil> beach@DDNUVAX.AF.MIL (darrel beach) writes: ..... > >There also seems to be the beginning of a plethora of so called >gateways to get from smtp based mail systems to X.400 based systems, >and might add full suite GOSIP x.400. Now just how the heck you map >some particular X.400 address to some particular user@host internet >address seems a little dicey. From what I've seen, it looks like >another big table to do the mapping. Has anybody implemented one >of these beasts and knows the definitive answer?? There are quite a few RFC987/1148 gateways out there (RFC987/1148 describe the mapping of X.400(84)/(88) to RFC822 and vice versa). Currently the tables which control the address mapping have around 600 entries. The main problem with them is not so much the size*, but the fact that changes to the tables and installation of them has to be globally coordinated. For example: in the RARE MHS project, installation of new tables happens every two months. *if you have a reasonable mapping strategy you can keep the number of entries per country to a sensible number, we have five (plus mappings for RFC822 top level domains: edu etc.), Germany ~180. -- ------------------------------------------------------------------------ Simon Poole poole@verw.switch.ch / poole@chx400.switch.ch / mcsun!chx400!poole ------------------------------------------------------------------------
hung@ENIAC.SEAS.UPENN.EDU (Han Hung) (07/11/90)
t~?
sharon@asylum.SF.CA.US (Sharon Fisher) (07/11/90)
In article <CMM.0.88.647647249.beach@ddnuvax.af.mil> beach@DDNUVAX.AF.MIL (darrel beach) writes: >Now that implementation of GOSIP are appearing, or at are claimed, on >certain vendor's shelves, I have a question or two maybe someone can >answer. Really? Who?