On Fri, Mar 10, 2006 I posted a item to this mailing list with subject line "msgMaxSize handling not RFC compliant".
http://sourceforge.net/mailarchive/message.php?msg_id=14997558 To followup, this "issue" was uncovered in the use of SNMP Research's Config Wizard applet, which is included with their DSSP (Distributed SNMP Security Pack -- http://www.snmp.com/products/dssp.html) which was being used to provide the SNMPv3 layer to HP Openview NNM. DSSP is typically used by the Tier 1 Enterprise Network Management Software packages (Openview NNM, Netview, etc) for SNMPv3 support. Specifically, the problem was the fact that the SNMP Research's Config Wizard was using GetBulk operations with the msgMaxSize field of the SNMPv3 protocol specified as 2048. The GetBulk was being used to extract the USM table from the agent. With the quantity of OID's being requested, the result was in excess of 3000 bytes resulting in request being dropped by the agent (see aforementioned posting). The Config Wizard then times out and aborts. I note that it appears the default msgMaxSize used as by the net-snmp command line utilities is 65535 (0xffff) and as such the problem would never be encountered using the net-snmp utilities unless an overly excessive number of oid's were being requested in the snmpbulkget command. Here is the kicker for me; I know that net-snmp is widely integrated. Has no one uncovered this issue with Net-snmp SNMPv3 with NNM/Netview/etc or simply is SNMPv3 utilized at such a minimal level using only open source (ie $0) management tools? Alternatively, if Net-snmp is being used for SNMPv3, what are people using for network management software to configure USM and VACM from a centralled network management station? For counter reference this issue was relatively "new" to the folks at SNMP Research as well. ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
