BinTec X3200, User Manual

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330 BinTec Communications AG
Troubleshooting
9
➤
Use S
YSTEM
➧
E
XTERNAL
S
YSTEM
L
OGGING
to check if X3200 is config-
ured so that syslog messages are sent to a host outside the LAN (destina-
tion port 514).
➤
Check the MIB table biboAdmTrapHostTable to determine if X3200 is
configured so that SNMP traps (messages) are sent to a host outside the
LAN (destination ports 161, 162).
➤
Check if the second B-channel is frequently set up and cleared for connec-
tions with dynamic channel bundling due to fluctuating traffic.
➤
Use
debug all
or
trace
to check if a PC in the LAN is configured for the
WINS server with an incorrect IP address (destination ports 137-139). If
necessary, configure the PC properly or set the corresponding filters.
➤
Use
debug all
or
trace
to check if a PC in the LAN is configured for the
resolution of NetBIOS names with the help of DNS (it is accessed from a
client port to destination port 53). Do not try to resolve NetBIOS names with
DNS!
➤
Use
debug all
or
trace
to check if an application on a PC in the LAN is
trying to resolve names that the name server at the Internet provider does
not know (it is accessed from a client port to destination port 53). Configure
a local HOSTS file in the Windows directory that can carry out name reso-
lution (see
chapter 4.5, page 95 ).
➤
Use
debug all
or
trace
to check if NetBIOS over IP is configured on a
PC in the LAN (it is accessed from source port 137 to destination port 53).
An attempt is thus made to resolve NetBIOS names over DNS. Switch off
NetBIOS over IP or set filters (configuration of the corresponding filters can
be found in
chapter 5.1.7, page 124 . You can also use the simple NetBIOS
filter of the Configuration Wizard , see chapter 4.7, page 101 ).
➤
Check if you have configured callback (see chapter 7.2.4, page 279 ) and in
doing so entered an incorrect number (Number under WAN P
ARTNER
➧
E
DIT
➧
WAN N
UMBERS
➧
E
DIT
).
➤
Check if you left a trace program running over an ISDN PPP connection.
This would cause packets to be sent constantly over ISDN and the connec-
tion would remain permanently open.