Hello Bobby, SNMP V1 and V2 are very close. They both use community strings to authenticate the packets. The community string is sent in plain-text in every single SNMPv1 or SNMPv2 packet and the agent uses it to decide to process the packet or discard it. The main difference between V1 and V2 is that SNMPv2 added a few more packet types like the GETBULK PDU which enable you to request a large number of GET or GETNEXT in one packet. SNMPv1 was also originately defined to use SMI, SNMPv2 uses SMIv2 which is a better, with more data types like 64-bit counters, etc... But mostly the difference between V1 and V2 is internal and the end user will probably not notice any difference between the two.
SNMPv3 was designed to address the weak V1/V2 security. SNMPv3 is based on SNMPv2 (same packet types, it also uses SMIv2, etc...), but the main difference is that it is a lot more secure. It does not use community strings but users with passwords, and SNMPv3 packets can be authenticated and encrypted depending of how your users have been defined. In addition, the SNMPv3 framework defines user groups and mib-views which enable an agent to control the access to its mib objects. A mib-view is a subset of the mib. You can use mibviews to define what part of the mib a user can read (SNMP GET/GETNEXT) or write (SNMP SET), etc... The SNMPv3 framework can also be used with V1 and V2 but it was defined for SNMPv3. Hope that helps. Sebastien Windal IPSwitch, Inc. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bobby Kamma Sent: Tuesday, November 02, 2004 4:06 AM To: WUG Subject: [WhatsUp Forum] Difference beteween SNMP V1/V2/V3 ? Hi, What are differences beteween SNMP V1/V2/V3 ? Thanks, Bobby VR Kumar. -- India.com free e-mail - www.india.com. Check out our value-added Premium features, such as an extra 20MB for mail storage, POP3, e-mail forwarding, and ads-free mailboxes! Powered by Outblaze Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/whatsup_forum%40list.ipswitch.com/ Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/whatsup_forum%40list.ipswitch.com/
