Chapter 11. Fast Connect for AIX troubleshooting 177
Figure 103. AIX TCP/IP protocol configuration
You can use other commands to help you analyze the configuration, routing,
DNS, and other TCP/IP related problems, such as hostname, ping, netstat,
route, and arp. See Section 11.3, Generic TCP/IP utilities on page 174.
You can try using the Solving basic TCP/IP problems procedure on the
following Web site:
http://support.microsoft.com/support/tshoot/nt4_tcp.asp
11.4.2 NetBIOS over TCP/IP troubleshooting
When you want to analyze NetBIOS over TCP/IP configuration, you have
different utilities to check your NetBIOS name resolution, routing, and
browsing.
11.4.2.1 tracert commands
The
tracert command is a route tracing utility similar to the trace utility in
UNIX. It determines a route to a destination by sending ICMP echo packets
with varying TTL value (time-to-live). You can use the following options:
-d IP addresses are not resolved to hostnames.
178 Fast Connect for AIX Version 3.1 Guide
-h This defines the maximum number of hops to reach the destination.
-j This specifies a loose source route along host-list.
-w This specifies wait time for each reply.
The output shows the steps to reach the destination. Every line shows the
hop number, three round-trip times for three attempts, and the hostname (or
IP address) of the system that was reached in this hop. An asterisk (
*) means
that the attempt timed out.
11.4.2.2 nbtstat tool
This tool is used for troubleshooting NetBIOS name resolution. The name
resolution on Windows NT client uses one of the following methods; local
cache lookup, WINS server, broadcast, DNS, LMHOSTS, or HOSTS lookup.
nbtstat can help you analyze name resolution problems with the following
options:
-n This lists local registered NetBIOS names.
-a, -A This lists the remote computers name table (similar to what option
-n does for a local computer).
-c This shows the content of NetBIOS name cache.
C:\>tracert lv3030c
Tracing route to lv3030c.itsc.austin.ibm.com [9.3.187.213]
over a maximum of 30 hops:
1 10 ms * <10 ms itso240.itsc.austin.ibm.com [9.3.240.1]
2 <10 ms <10 ms <10 ms lv3030c.itsc.austin.ibm.com [9.3.187.213]
Trace complete.
C:\>nbtstat -n
Node IpAddress: [9.3.240.113] Scope Id: []
NetBIOS Local Name Table
Name Type Status
-------------------------------------------
AUSRES10 <00> UNIQUE Registered
ITSOAUSNT <00> GROUP Registered
AUSRES10 <03> UNIQUE Registered
AUSRES10 <20> UNIQUE Registered
INet~Services <1C> GROUP Registered
IS~AUSRES10....<00> UNIQUE Registered
ITSOAUSNT <1E> GROUP Registered
Chapter 11. Fast Connect for AIX troubleshooting 179
-r This shows the name resolution and registration statistics as well as
names resolved by broadcast.
-R This clears the local cache and reloads it from the LMHOSTS file.
-s, -S This lists the NetBIOS sessions. The first option will show NetBIOS
names and the second one will show IP addresses.
11.4.2.3 browstat utility
The
Microsoft Windows NT Server Resource Kit 4.0
includes the browstat
utility, which can be used to analyze the SMB network.
The browstat utility can show you browsers and the domain organization of a
network. It is a command line utility. Some options of the command require a
transport
parameter. You can retrieve it with browstat status (this is part of
the output):
You can see two transports,
NetBF_Ibmtok51 and Nbf_Ibmtok51, in this example.
Browstat has the following options:
status [ -V ] [ domain ] This shows the status of the domain. The -V
switch shows us extended information. You can
see basic browsing and domain information in
the following sample output:
C:\>nbtstat -s
NetBIOS Connection Table
Local Name State In/Out Remote Host Input Output
----------------------------------------------------------------------------
LV3030B <00> Connected Out ITSONT00 <20> 105KB 105KB
LV3030B <00> Connected Out LV3030C <20> 11KB 1KB
LV3030B <03> Listening
LV3030B Connected In AUSRES10 <00> 2MB 1MB
ADMINISTRATOR <03> Listening
Status for domain ITSOAUSNT on transport \Device\NetBT_Ibmtok51
...
Status for domain ITSOAUSNT on transport \Device\Nbf_Ibmtok51
...

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