The hyphen character may be problematic here. It certainly is for db links and db domains. On 3 Nov 2010 16:05, "Uwe Küchler" <uwe@xxxxxxxxxxxx> wrote: Hi Dick, that idea is not too bad. Finally, my Ops folks decided to rename the servers using a simple naming scheme that constrains names to 8 characters. The nuisance is that with prefix and suffix (when clustered) only 3 to 5 characters remain to distinguish the server. BTW: Do you (or anyone here) know if this issue is solved in 11gR2? MOS documents only say that the issue pertains to all releases up to 11.1, but no document says if this got fixed in 11.2... And, last but not least, here's a small test case to show that this problem isn't strictly academic. I used utl_inaddr to resolve the server's IP address: $ uname -n xx-myserver SQL> select sys.utl_inaddr.get_host_address() from dual; select sys.utl_inaddr.get_host_address() from dual * ERROR in line 1: ORA-29257: host xx-myser unknown ORA-06512: at "SYS.UTL_INADDR", line 19 ORA-06512: at "SYS.UTL_INADDR", line 40 ORA-06512: at line 1 Have a nice day, Uwe Am Di, 2.11.2010, 20:55, schrieb Goulet, Richard: > Uwe, > > Our host names are something like 'US-BOS-DB999.na.pxl.int' which > obviously exceeds th...