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07-11-2005 04:09 AM
07-11-2005 04:09 AM
DECServers Rebooting
The DecServers appear to reboot successfully and are functional. No errors are being reported anywhere that I can find.
Details: VAX V7.1 is doing the downloads.
New ES47s are VMS v7.3-2 . Decnet IV on
all systems.
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07-11-2005 04:28 AM
07-11-2005 04:28 AM
Re: DECServers Rebooting
Obviously running a monitor on the network to capture the simulateous failure would be a good idea.
Another possible cause of the problem would be a power glitch of some kind. Any other symptoms on any other equipment in the area.
I cannot think of a reason why the presence of an ES47 would cause a problem with terminal servers. If anything caused a problem, I would suspect 7.3-2, but any such problem should have been noted a long time ago.
I hope that the above is helpful.
- Bob Gezelter, http://www.rlgsc.com
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07-11-2005 04:43 AM
07-11-2005 04:43 AM
Re: DECServers Rebooting
I was wondering if there were limits to the LAT services or whether the ES47 would broadcast more frequently. In setting up the LAT services we took the defaults. If a ES47 does not do anything more than any other VMS host servicing LAT, then I do not see how these hosts added to the network caused the problem we are experiencing. The ES47s replaced AlphaServers that were at the same VMS version.
I am focusing on DECNET in that we have IP traffic but I thought that should be transparent to the DECServers. That may be a wrong assumption. The DECServers are model 200. They have been in service for many many years.
Thanks for your response.
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07-11-2005 04:55 AM
07-11-2005 04:55 AM
Re: DECServers Rebooting
I had ages ago on issue with non-DEC terminal servers after VMS upgrade. The said upgrade changed LAT from the very old "slave only LAT" to the LATmaster (master,slave capabilities) and somehow the thirdparty terminal server disliked the new LAT on VMS.
You have here though VAX/VMS V7.1 so there is not that much difference in LAT protocol on VAX V7.1 and Alpha V7.3-2 probably.
One could of course attach a terminal to the port 1 of terminal server and see what kind of messages the server issues on the "console" when dying?
_veli
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07-11-2005 04:59 AM
07-11-2005 04:59 AM
Re: DECServers Rebooting
did you look at the SHOW SERVER STATUS display ? Escpecially the Software Status line on the bottom of the screen ? As far as I remember - and it's a long time ago - if the DECserver would crash with a bugcheck, it would record information about the bugcheck in that line.
You could compare, if all DECservers would be crashing with the same bugcheck information.
Make sure you are running the most recent available software version for the DECservers.
Do the DECserver write dumps to their load host when crashing ? If so, watch out for the disk space !
There could be a timing problem in the LAT protocol implementation on the DECserver that does not get triggered with older/slower OpenVMS systems.
Volker.
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07-11-2005 05:12 AM
07-11-2005 05:12 AM
Re: DECServers Rebooting
If I recall correctly, this means that the DECserver has received ethernet frames with protocoll types it does not understand, e.g. TCP/IP.
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07-11-2005 05:22 AM
07-11-2005 05:22 AM
Re: DECServers Rebooting
Show Status line appears to give current status and not status of crash. Did give useful info though. CPU is 6% used and memory is 12% used. It also confirmed that we are well below max number of services, nodes, and the like.
Digging up a Terminal and a Printer for Port 1 on one of the terminal servers is a good idea. The software is so old , the dumps are unreadable .
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07-11-2005 06:01 AM
07-11-2005 06:01 AM
Re: DECServers Rebooting
_veli
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07-11-2005 06:36 AM
07-11-2005 06:36 AM
Re: DECServers Rebooting
If the DECservers are very far behind the last version of the software issues, I would certainly upgrade at least ONE of them before going too far down the debugging path.
As I noted, the ES47 should not be doing anything special or different.
- Bob Gezelter, http://www.rlgsc.com
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07-11-2005 08:01 AM
07-11-2005 08:01 AM
Re: DECServers Rebooting
There was an Alpha VMS 7.1x bug in LAT. On a "busy" network LAT packets that generated a collision and required a retransmission were padded with random values. The DECservers request retransmission of the mangled packet, the packet padded once again. . . repeat until the DecServer reboots. Depending on your network the value of "busy" may have been reached.
Check for LAT ECOs or consider an upgrade to VAX 7.3 if possible.
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07-11-2005 09:18 AM
07-11-2005 09:18 AM
Re: DECServers Rebooting
1. If it were one server, I would suspect a susceptibilty to heat or a problem with the power to the terminal server. Since the reboots are simultaneous (I assume in various locations), I would update at least one of the DecServer 200's to V3.3 and see if that server stays up when the others go down. If it stays up, there is a good chance your problem is solved. The latter versions fixed crash problems. In any case, the first thing HP would say is upgrade your DecServer 200's to V3.3.
2. A bug check message would be reported on console port (port 1; 9600 baud).
" 3.3 SEVERE ERRORS
Severe errors may cause your DECserver 200 to hang or bugcheck.
Server hangs are usually recovered after 20 seconds by a automatic power fail, followed by a downline load. If this should occur, please describe as best you can the operating conditions on the server at the time of the hang.
If a FATAL BUGCHECK occurs, a bugcheck message will be printed out on the console terminal, showing the vital registers at the time of the bugcheck. Normally, an upline crash dump will automatically be created upon a fatal bugcheck error.
3. The second thing HP would say would be to upgrade to VAX VMS 7.3.
Lawrence
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07-11-2005 03:57 PM
07-11-2005 03:57 PM
Re: DECServers Rebooting
re: Unrecognized destinations...
Ethernet packets counted as 'unrecognized destinations' will most probably be broadcast packets. The packets are being received by the DECserver (due to them being addressed to it's MAC address or an enabled multicast address or are broadcast packets). The DECserver would only expect LAT unicast or multicast packets and would not be able to handle other protocols.
Do you also see high multicast frames received ? Do you have a high percentage of broadcast messages on your LAN, maybe something like a 'broadcast storm' from time to time ?
If the DECserver would bugcheck, the bugcheck message should be indicated on the SHOW SERVER STATUS screen after the reboot (just checked the docu).
Volker.
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07-11-2005 11:03 PM
07-11-2005 11:03 PM
Re: DECServers Rebooting
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07-12-2005 06:22 AM
07-12-2005 06:22 AM
Re: DECServers Rebooting
Local -913- Fatal Bugcheck PC=184EC8, SP=05D8A8, SR=2710, MEM=000000, CODE=100
Local -905- Waiting for image dump
Local -906- Dumping to host "xx-xx-xx-xx-xx-xx"
Local -907- Image dump complete
Local -908- Resetting console terminali
Local -901- Initializing DECserver "xx-xx-xx-xx-xx-xx" -- ROM BL20, H/W Rev D.A
Local -902- Waiting for image load
Local -903- Loading from host "xx-xx-xx-xx-xx-xx"
Local -904- Image load complete
I changed the real addresses to xx and the terminali was not a typo, that is how it printed out. I have the distribution for the upgrade to V3.3, but have not been able to move it to the VAX system because of other problems (not with the VAX, but the other systems I have to use to transfer it to the VAX).
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07-12-2005 03:38 PM
07-12-2005 03:38 PM
Re: DECServers Rebooting
However,
MEM = The illegal memory address of an addressing error or the address of the instruction that caused the error.
nd this was 0... I would not spend time upgrading to VMS V7.3. I would much rather upgrade to latest DECserver software, i.e. install DS2033 kit to the load host(s) and reboot the terminal server.
v1.0 must be quite old since I can see V3.0 on CONDIST from Nov 1989 to March 1991, V3.1 from May 1991 to Jan 1994 and V3.3 from May 1994 to 1997 March.
_veli
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07-13-2005 01:35 AM
07-13-2005 01:35 AM
Re: DECServers Rebooting
I appreciate all the information that has be posted . It has been very helpful.
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07-13-2005 10:59 PM
07-13-2005 10:59 PM