There is a known and somewhat documented restriction where an administrative ID which connects to a New (7.1.8 or 8.1.2+) server from a New dsmadmc client, cannot connect from an Old administrative client anymore, because SESSIONSECURITY has been switched to STRICT.
I have now discovered that this affects Command Routing among servers. It makes sense, if you think about it, but it bit me. My test setup has two servers, one running 6.3.5 and the other 7.1.8. They both have Admin ID roger with the same password. Command routing initially worked fine between the two servers using Admin ID roger. But then Admin ID roger used a 7.1.8 client dsmadmc to connect to the 7.1.8 server, and all that SSL magic happened and SESSIONSECURITY got changed to STRICT. As documented, now Admin ID roger cannot use an older client dsmadmc to reach the 7.1.8 server. Although roger can still connect to the 6.3.5 server using any version client dsmadmc, now command routing no longer works. It fails with "ANR0454E Session rejected by server ADSM-3, reason: 7 - Down level." It does work when Admin ID roger connects to the 7.1.8 server. UPD ADMIN ROGER SESSIONSECURITY=TRANSITIONAL is a bypass, and I'm keeping the (ugly) suggestion in mind to issue it every 5 minutes from a schedule if this becomes an issue. I have noticed that, if SESSIONSECURITY=TRANSITIONAL is in effect, and you use an Old client to connect to an Old server, and you use command routing to route a command to a New server, it does NOT change SESSIONSECURITY to STRICT for that Admin ID on the New server. That is good. This feature of automatically setting SESSIONSECURITY to STRICT on Admin IDs is turning into one of our worst stumbling blocks in this major update. I'm the administrator; don't mess with my own ID! This looks like another reason to upgrade ALL servers to 7.1.8/8.1.2+ before upgrading ANY clients. We have several admin IDs that are used by a variety of cron processes to monitor and control the backup systems. Some of these processes use command routing. I am now inventorying them, because the clients they connect from must all be upgraded together at the same time to avoid failures of these monitoring and control processes. Roger Deschner University of Illinois at Chicago "I have not lost my mind; it is backed up on tape somewhere."