1. My current HP Openview is running on SNMP version 1, how do I ensure that my system supports SNMP version 2 and version 3?
2. How is SNMPv2 and SNMPv3 different from SNMPv1?
3. How do I upgrade from SNMPv1 to SNMPv2 or SNMPv3?
4. What is the difference between SNMPv2 and SNMPv2c?
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OpenView is a large suite of products. I am going to assume by "OpenView" you mean OpenView Network Node Manager (NNM) as it is the primary SNMP monitoring tool in the suite.
So, to answer your questions (assuming you are using NNM):
1) NNM natively supports both SNMPv1 and SNMPv2c. To enable SNMPv3 support in all current versions of NNM, you must get the SNMP Security Pack add-on from SNMP Research (http://www.snmp.com).
2) SNMPv2 was a huge change from SNMPv1 whereby a totally new structure of management information was defined and several new communication standards and operations were introduced (standardized PDU, enhanced table functions, etc). SNMPv3 is heavily based on SNMPv2 but adds an extensible security layer around the communications that was never settled in SNMPv2.
3) 'Upgrading' between SNMPv1 and SNMPv2c is almost trivial. If you are using any other tools aside from NNM, verify that they can support SNMPv2c and then change all your devices that support SNMPv2c to use the updated protocol. To my knowledge all OpenView products should natively support SNMPv1 and SNMPv2c.
Upgrading to SNMPv3 is much more complex as it will involve much more work in defining the security parameters and installing additional software to enable the secure communications. Once all that is in place, you have to reconfigure your devices to SNMPv3 and the required security parameters.
4) SNMPv2 attempted to solve many of the issues with SNMPv1. They were very successful in addressing many of the fundamental issues, but were left with the challenge of addressing security. SNMPv1 uses community strings as sort of passwords to enable read and write operations to the SNMP agents. These community strings are passed in 'clear text' and anyone listening 'on the wire' could pick out the community strings and there were no restrictions around who could look at what.
When they were working on SNMPv2 they tried to address the security issues and a couple different proposals came forward. For a number of reasons the security model-based SNMPv2 versions (SNMPv2u, SNMPv2p, SNMPv2*) were not widely accepted. The other proposal for security was to retain the 'community' model used in SNMPv1. This is where the 'c' comes from. It is the most widely implemented version of SNMPv2.
Currently the version of NNM I am using is v5.2 and v6.3. I would like to upgrade this to version 7.5 or 8.0. 1.What version of SNMP does NNM v7.5 and 8.0 come with? 2.What version of SNMP does NNM v7.5 and 8.0 support?
NNM 6.x and 7.x all support SNMPv1 and SNMPv2c, natively. With the SNMP Security Pack, SNMPv3 support can be obtained.
As for NNM 8.x, it will definitely support all three versions (as in previous NNM releases), the only question is to whether or not it will include the SNMP Security Pack or whether it will still have to be purchased from SNMP Research. Of that I am not 100% certain.
By the way, do you know if Cisco and Alcatel equipment support SNMPv1, v2, and v3?
Other than the getBulk feature of SNMPv2, could you help to explain the benefits of SNMPv2 over SNMPv1? I am new in this, and those commands like getBulk sounds ambiguous to me.
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