Document revision date: 30 March 2001

To boot successfully, a satellite must communicate with a MOP server over the LAN. You can use DECnet event logging to verify this communication. Proceed as follows:

Step	Action
1	Log in as system manager on the MOP server.
2	If event logging for management-layer events is not already enabled, enter the following NCP commands to enable it: NCP> SET LOGGING MONITOR EVENT 0.* NCP> SET LOGGING MONITOR STATE ON
3	Enter the following DCL command to enable the terminal to receive DECnet messages reporting downline load events: $ REPLY/ENABLE=NETWORK
4	Boot the satellite. If the satellite and the MOP server can communicate and all boot parameters are correctly set, messages like the following are displayed at the MOP server's terminal: DECnet event 0.3, automatic line service From node 2.4 (URANUS), 15-JAN-1994 09:42:15.12 Circuit QNA-0, Load, Requested, Node = 2.42 (OBERON) File = SYS$SYSDEVICE:<SYS10.>, Operating system Ethernet address = 08-00-2B-07-AC-03 DECnet event 0.3, automatic line service From node 2.4 (URANUS), 15-JAN-1994 09:42:16.76 Circuit QNA-0, Load, Successful, Node = 2.44 (ARIEL) File = SYS$SYSDEVICE:<SYS11.>, Operating system Ethernet address = 08-00-2B-07-AC-13 WHEN... THEN... The satellite cannot communicate with the MOP server (VAX or Alpha). No message for that satellite appears. There may be a problem with a LAN cable connection or adapter service. The satellite's data in the DECnet database is incorrectly specified (for example, if the hardware address is incorrect). A message like the following displays the correct address and indicates that a load was requested: DECnet event 0.7, aborted service request From node 2.4 (URANUS) 15-JAN-1994 Circuit QNA-0, Line open error Ethernet address=08-00-2B-03-29-99 Note the absence of the node name, node address, and system root.

Sections C.3.2 through C.3.5 provide more information about satellite boot troubleshooting and often recommend that you ensure that the system parameters are set correctly.

C.3.1 Displaying Connection Messages

To enable the display of connection messages during a conversational boot, perform the following steps:

Step	Action
1	Enable conversational booting by setting the satellite's NISCS_CONV_BOOT system parameter to 1. On Alpha systems, update the ALPHAVMSSYS.PAR file, and on VAX systems update the VAXVMSSYS.PAR file in the system root on the disk server.
2	Perform a conversational boot. ++On Alpha systems, enter the following command at the console: >>> b -flags 0,1
	+On VAX systems, set bit <0> in register R5. For example, on a VAXstation 3100 system, enter the following command on the console: >>> B/1
3	Observe connection messages. Display connection messages during a satellite boot to determine which system in a large cluster is serving the system disk to a cluster satellite during the boot process. If booting problems occur, you can use this display to help isolate the problem with the system that is currently serving the system disk. Then, if your server system has multiple LAN adapters, you can isolate specific LAN adapters.
4	Isolate LAN adapters. Isolate a LAN adapter by methodically rebooting with only one adapter connected. That is, disconnect all but one of the LAN adapters on the server system and reboot the satellite. If the satellite boots when it is connected to the system disk server, then follow the same procedure using a different LAN adapter. Continue these steps until you have located the bad adapter.

Reference: See also Appendix C for help with troubleshooting satellite booting problems.

C.3.2 General OpenVMS Cluster Satellite-Boot Troubleshooting

If a satellite fails to boot, use the steps outlined in this section to diagnose and correct problems in OpenVMS Cluster systems.

Step	Action
1	Verify that the boot device is available. This check is particularly important for clusters in which satellites boot from multiple system disks.
2	Verify that the DECnet network is up and running.
3	Check the cluster group code and password. The cluster group code and password are set using the CLUSTER_CONFIG.COM procedure.
4	Verify that you have installed the correct OpenVMS Alpha and OpenVMS VAX licenses.
5	Verify system parameter values on each satellite node, as follows: VAXCLUSTER = 2 NISCS_LOAD_PEA0 = 1 NISCS_LAN_OVRHD = 0 NISCS_MAX_PKTSZ = 1498 1 SCSNODE is the name of the computer. SCSSYSTEMID is a number that identifies the computer. VOTES = 0 The SCS parameter values are set differently depending on your system configuration. Reference: Appendix A describes how to set these SCS parameters. To check system parameter values on a satellite node that cannot boot, invoke the SYSGEN utility on a running system in the OpenVMS Cluster that has access to the satellite node's local root. (Note that you must invoke the SYSGEN utility from a node that is running the same type of operating system---for example, to troubleshoot an Alpha satellite node, you must run the SYSGEN utility on an Alpha system.) Check system parameters as follows: Step Action A Find the local root of the satellite node on the system disk. The following example is from an Alpha system running DECnet for OpenVMS: $ MCR NCP SHOW NODE HOME CHARACTERISTICS Node Volatile Characteristics as of 10-JAN-1994 09:32:56 Remote node = 63.333 (HOME) Hardware address = 08-00-2B-30-96-86 Load file = APB.EXE Load Assist Agent = SYS$SHARE:NISCS_LAA.EXE Load Assist Parameter = ALPHA$SYSD:[SYS17.] The local root in this example is ALPHA$SYSD:[SYS17.]. Reference: Refer to the DECnet--Plus documentation for equivalent information using NCL commands. B Enter the SHOW LOGICAL command at the system prompt to translate the logical name for ALPHA$SYSD. $ SHO LOG ALPHA$SYSD "ALPHA$SYSD" = "$69$DUA121:" (LNM$SYSTEM_TABLE) C Invoke the SYSGEN utility on the system from which you can access the satellite's local disk. (This example invokes the SYSGEN utility on an Alpha system using the Alpha parameter file ALPHAVMSSYS.PAR. The SYSGEN utility on VAX systems differs in that it uses the VAX parameter file VAXVMSSYS.PAR). The following example illustrates how to enter the SYSGEN command USE with the system parameter file on the local root for the satellite node and then enter the SHOW command to query the parameters in question. $ MCR SYSGEN SYSGEN> USE $69$DUA121:[SYS17.SYSEXE]ALPHAVMSSYS.PAR SYSGEN> SHOW VOTES Parameter Name Current Default Min. Max. Unit Dynamic --------- ------- ------- --- ----- ---- ------- VOTES 0 1 0 127 Votes SYSGEN> EXIT

C.3.3 MOP Server Troubleshooting

$ MCR NCP

NCP> SHOW CIRCUIT ISA-0 CHARACTERISTICS

Circuit Volatile Characteristics as of 12-JAN-1994 10:08:30

Circuit = ISA-0

State = on

Service = enabled

Designated router = 63.1021

Cost = 10

Maximum routers allowed = 33

Router priority = 64

Hello timer = 15

Type = Ethernet

Adjacent node = 63.1021

Listen timer = 45

NCP> SET CIRCUIT
circuit-id STATE OFF

NCP> DEFINE CIRCUIT
circuit-id SERVICE ENABLED

NCP> SET CIRCUIT
circuit-id SERVICE ENABLED STATE ON

C.3.4 Disk Server Troubleshooting

To diagnose and correct problems for satellite booting, follow the steps outlined in this section.

Step	Action
1	Perform the steps in Sections C.3.2, C.3.3, and C.3.4.
2	For each satellite node, verify that the VOTES system parameter is set to 0.
3	++On Alpha systems, verify the DECnet network database on the MOP servers by running the NCP utility and entering the following commands to display node characteristics. The following example displays information about an Alpha node named UTAH: $ MCR NCP NCP> SHOW NODE UTAH CHARACTERISTICS Node Volatile Characteristics as of 15-JAN-1994 10:28:09 Remote node = 63.227 (UTAH) Hardware address = 08-00-2B-2C-CE-E3 Load file = APB.EXE Load Assist Agent = SYS$SHARE:NISCS_LAA.EXE Load Assist Parameter = $69$DUA100:[SYS17.] The load file must be APB.EXE. In addition, when booting Alpha nodes, for each LAN adapter specified on the boot command line, the load assist parameter must point to the same system disk and root number.
4	+On VAX systems, verify the DECnet network database on the MOP servers by running the NCP utility and entering the following commands to display node characteristics. The following example displays information about a VAX node named ARIEL: $ MCR NCP NCP> SHOW CHAR NODE ARIEL Node Volatile Characteristics as of 15-JAN-1994 13:15:28 Remote node = 2.41 (ARIEL) Hardware address = 08-00-2B-03-27-95 Tertiary loader = SYS$SYSTEM:TERTIARY_VMB.EXE Load Assist Agent = SYS$SHARE:NISCS_LAA.EXE Load Assist Parameter = DISK$VAXVMSRL5:<SYS12.> Note that on VAX nodes, the tertiary loader is SYS$SYSTEM:TERTIARY_VMB.EXE.
5	On Alpha and VAX systems, verify the following information in the NCP display: Step Action A Verify the DECnet address for the node. B Verify the load assist agent is SYS$SHARE:NISCS_LAA.EXE. C Verify the load assist parameter points to the satellite system disk and correct root. D Verify that the hardware address matches the satellite's Ethernet address. At the satellite's console prompt, use the information shown in Table 8-3 to obtain the satellite's current LAN hardware address. Compare the hardware address values displayed by NCP and at the satellite's console. The values should be identical and should also match the value shown in the SYS$MANAGER:NETNODE_UPDATE.COM file. If the values do not match, you must make appropriate adjustments. For example, if you have recently replaced the satellite's LAN adapter, you must execute CLUSTER_CONFIG.COM CHANGE function to update the network database and NETNODE_UPDATE.COM on the appropriate MOP server.
6	Perform a conversational boot to determine more precisely why the satellite is having trouble booting. The conversational boot procedure displays messages that can help you solve network booting problems. The messages provide information about the state of the network and the communications process between the satellite and the system disk server. Reference: Section C.3.6 describes booting messages for Alpha systems.

On Alpha systems, the messages are displayed as shown in Table C-2.

Table C-2 Alpha Booting Messages (Alpha Only)

Message	Comments
%VMScluster-I-MOPSERVER, MOP server for downline load was node UTAH
This message displays the name of the system providing the DECnet MOP downline load. This message acknowledges that control was properly transferred from the console performing the MOP load to the image that was loaded.	If this message is not displayed, either the MOP load failed or the wrong file was MOP downline loaded.
%VMScluster-I-BUSONLINE, LAN adapter is now running 08-00-2B-2C-CE-E3
This message displays the LAN address of the Ethernet or FDDI adapter specified in the boot command. Multiple lines can be displayed if multiple LAN devices were specified in the boot command line. The booting satellite can now attempt to locate the system disk by sending a message to the cluster multicast address.	If this message is not displayed, the LAN adapter is not initialized properly. Check the physical network connection. For FDDI, the adapter must be on the ring.
%VMScluster-I-VOLUNTEER, System disk service volunteered by node EUROPA AA-00-04-00-4C-FD
This message displays the name of a system claiming to serve the satellite system disk. This system has responded to the multicast message sent by the booting satellite to locate the servers of the system disk.	If this message is not displayed, one or more of the following situations may be causing the problem: The network path between the satellite and the boot server either is broken or is filtering the local area OpenVMS Cluster multicast messages. The system disk is not being served. The CLUSTER_AUTHORIZE.DAT file on the system disk does not match the other cluster members.
%VMScluster-I-CREATECH, Creating channel to node EUROPA 08-00-2B-2C-CE-E2 08-00-2B-12-AE-A2
This message displays the LAN address of the local LAN adapter (first address) and of the remote LAN adapter (second address) that form a communications path through the network. These adapters can be used to support a NISCA virtual circuit for booting. Multiple messages can be displayed if either multiple LAN adapters were specified on the boot command line or the system serving the system disk has multiple LAN adapters.	If you do not see as many of these messages as you expect, there may be network problems related to the LAN adapters whose addresses are not displayed. Use the Local Area OpenVMS Cluster Network Failure Analysis Program for better troubleshooting (see Section D.5).
%VMScluster-I-OPENVC, Opening virtual circuit to node EUROPA
This message displays the name of a system that has established an NISCA virtual circuit to be used for communications during the boot process. Booting uses this virtual circuit to connect to the remote MSCP server.
%VMScluster-I-MSCPCONN, Connected to a MSCP server for the system disk, node EUROPA
This message displays the name of a system that is actually serving the satellite system disk.	If this message is not displayed, the system that claimed to serve the system disk could not serve the disk. Check the OpenVMS Cluster configuration.
%VMScluster-W-SHUTDOWNCH, Shutting down channel to node EUROPA 08-00-2B-2C-CE-E3 08-00-2B-12-AE-A2
This message displays the LAN address of the local LAN adapter (first address) and of the remote LAN adapter (second address) that have just lost communications. Depending on the type of failure, multiple messages may be displayed if either the booting system or the system serving the system disk has multiple LAN adapters.
%VMScluster-W-CLOSEVC, Closing virtual circuit to node EUROPA
This message indicates that NISCA communications have failed to the system whose name is displayed.
%VMScluster-I-RETRY, Attempting to reconnect to a system disk server
This message indicates that an attempt will be made to locate another system serving the system disk. The LAN adapters will be reinitialized and all communications will be restarted.
%VMScluster-W-PROTOCOL_TIMEOUT, NISCA protocol timeout
Either the booting node has lost connections to the remote system or the remote system is no longer responding to requests made by the booting system. In either case, the booting system has declared a failure and will reestablish communications to a boot server.

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