Technical data
Troubleshooting Techniques and Tools
1.2 Isolating Problems
$ SHOW SYSTEM /NETWORK
OpenVMS V7.1-1H2 on node RUFUS 27-JUN-2000 16:45:46.84 Uptime 16 01:55:35
Pid Process Name State Pri I/O CPU Page flts Pages
2FC0021F TCPIP$NTP LEF 10 2042786 0 00:02:03.43 657 190 N
2FC00221 TCPIP$LBROKER LEF 9 3779921 0 00:06:27.51 652 271 N
2FC05046 TCPIP$POP_1 HIB 10 243688 0 00:00:48.42 955 598 N
2FC00289 TCPIP$PORTM LEF 10 13289 0 00:00:03.23 614 189 N
2FC0628F TCPIP$RE_BG1879 LEF 6 1647 0 00:00:00.96 1709 612 N
2FC0089A NFS$SERVER LEF 10 89284 0 00:00:19.28 978 580 N
2FC06C9E NOTES$00CD_2* HIB 6 208844 0 00:01:22.65 1932 152 N
2FC03EC7 TCPIP$BIND_1 LEF 10 515297 0 00:01:26.06 972 322 N
2FC01CF6 TCPIP$PCNFSD LEF 10 326 0 00:00:00.27 660 228 N
$
If the TCPIP$BIND_1 process is not running, look for errors in the
SYS$SPECIFIC:[TCPIP$BIND]TCPIP$BIND_RUN.LOG file.
To reduce the possibility of a name server being unavailable, you might configure
more than one name server on your network. This way, if the primary name
server is unreachable or unresponsive, the resolver can query the other name
server.
1.2.8 Checking the Route to a Remote Host
If you receive ‘‘network unreachable’’ messages, you may be experiencing a
routing problem. You can easily detect whether the problem is with your local
routing table by doing the following:
• Enter a
netstat -rn
or SHOW ROUTE command.
Display the routing table, then compare the output to the routing table of
a properly running system. Make sure there is a default route defined and
that the IP address listed in the gateway column for the default route and the
local host are in the same subnet. The default route specifies the gateway to
use when a route is not explicitly defined for the destination IP address.
For example, enter the following command:
TCPIP> netstat -rn
Routing tables
Destination Gateway Flags Refs Use Interface
Route Tree for Protocol Family 2
default 16.20.0.173 UG 17 1526068 WE0
10.10/16 16.20.208.154 UGS 0 204911 WE0
10.10.39/25 10.10.39.2 U 2 17942 BE0
16.20/16 16.20.208.100 U 45 6219676 WE0
16.20/16 16.20.208.208 U 0 0 WE0
127.0.0.1 127.0.0.1 UH 1 69844 LO0
Route Tree for Protocol Family 26
::1 Link#1 UH 0 0 LO0
ff01::/16 Link#1 U 0 0 LO0
• To display a default route using the TCP/IP Services management commands,
enter one of the following commands:
$ TCPIP SHOW ROUTE /PERMANENT /DEFAULT
$ TCPIP SHOW ROUTE /DEFAULT
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