ZyXEL VMG4325-B10A modem cfgmaker error "Error decoding response PDU"

[david_s...@hotmail.com]

This modem is provided by gtt.net for DSL customers. I have a /29 subnet coming across it and want to get the aggregate traffic from the LAN side of it. Cfgmaker fails to get a response from it while SnmpWalk v1.02 from snmpsoft.com seems to walk the modem just fine.

Any insight into this problems solution is greatly appreciated. Here are some symptoms...


This is an example error, I get 5 of these from cfgmaker.

Use of uninitialized value $response_community in string ne at C:/mrtg-2.17.7/bi
n\..\lib\mrtg2/SNMP_Session.pm line 870.
SNMP Error:
Error decoding response PDU:
Expected length 61, got 1496
%{%i%s%*{%i%i%i%{%@


Cfgmaker completes its query with these lines.

Use of uninitialized value $comment_sysdescr in substitution (s///) at cfgmaker
line 379.
Use of uninitialized value $sysname in concatenation (.) or string at cfgmaker l
ine 412.
Use of uninitialized value $comment_sysdescr in concatenation (.) or string at c
fgmaker line 412.
Use of uninitialized value $syscontact in concatenation (.) or string at cfgmake
r line 412.
Use of uninitialized value $syslocation in concatenation (.) or string at cfgmak
er line 412.