Whilst configuring an OpenVMS 7.3 (VAX) 2-node Cluster using DECnet Phase IV, I was unable to use commands such as SET HOST as nodename lookup was failing. Each node could “see itself”, as it were, but that was about it.
To resolve this, I first started by using NCP and ran a couple of LOOP NODE commands. The first to my local node TOM (which silently returns - i.e. loop is verified) and the second to remote node JERRY (which fails):
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$ RUN SYS$SYSTEM:NCP NCP> LOOP NODE TOM NCP> LOOP NODE JERRY %NCP-W-MIRCTF, Mirror connect failed , Unrecognized node name Messages not looped = 1 |
OK - let’s check the NODE database:
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NCP> SHOW NODE * Known Node Volatile Summary as of 5-FEB-2013 20:51:07 Executor node = 1.151 (TOM) State = on Identification = DECnet for OpenVMS VAX V7.3 |
So, we can only see the EXECUTOR itself, TOM (with DECnet address 1.151). Using the SET NODE and DEFINE NODE commands, I added an entry for JERRY to the database on TOM:
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NCP> SET NODE 1.152 NAME JERRY NCP> DEFINE NODE 1.152 NAME JERRY |
A SHOW NODE now looks more promising:
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NCP> SHOW NODE * Known Node Volatile Summary as of 5-FEB-2013 20:52:28 Executor node = 1.151 (TOM) State = on Identification = DECnet for OpenVMS VAX V7.3 Node State Active Delay Circuit Next node Links 1.152 (JERRY) QNA-0 0 |
Next, on JERRY, run NCP and copy the known nodes database down from TOM (1.151):
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$ RUN SYS$SYSTEM:NCP NCP> COPY KNOWN NODES FROM 1.151 TO BOTH NCP> SHOW NODE * Known Node Volatile Summary as of 5-FEB-2013 20:52:51 Executor node = 1.152 (JERRY) State = on Identification = DECnet for OpenVMS VAX V7.3 Node State Active Delay Circuit Next node Links 1.151 (TOM) QNA-0 0 NCP> EXIT |
Great - we can see both nodes from both nodes. LOOP NODE will confirm this, but let’s try something cooler, a remote login with SET HOST:
From JERRY:
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$ SET HOST TOM Welcome to OpenVMS (TM) VAX Operating System, Version V7.3 Username: system Password: Welcome to OpenVMS (TM) VAX Operating System, Version V7.3 on node TOM Last interactive login on Tuesday, 5-FEB-2013 20:39 $ |
Excellent. Check the other direction with a SET HOST JERRY from TOM, and verify that all is well. The PHONE utility should now work too - bet you’re happy about that 