I'm running OpManager version 8723.

Cisco settings:

User name: netsnmp

Engine ID: 800000090300001AA1426408

storage-type: nonvolatile active

Authentication Protocol: SHA

Privacy Protocol: DES

Group-name: readonly

This is the output from when OpManager tries to authenticate with the router.  I have already setup the 

SNMPv3 for the creditials in OpManager.  For some reason when the server sends a request is using

the (security level: noauth) and a (username: initial) instead of the credentials that I'm inputing.

*Mar  4 2011 17:46:11: SNMP: Packet received via UDP from 172.5.5.246 on FastEthernet0/0

*Mar  4 2011 17:46:11: 

Incoming SNMP packet

*Mar  4 2011 17:46:11: v3 packet security model: v3 security level: noauth

*Mar  4 2011 17:46:11: username: initial

*Mar  4 2011 17:46:11: snmpEngineID: 800000090300001AA1426408

*Mar  4 2011 17:46:11: snmpEngineBoots: 0 snmpEngineTime: 0

*Mar  4 2011 17:46:11: SNMP: Report, reqid 4278, errstat 0, erridx 0 

 internet.6.3.15.1.1.4.0 = 8

*Mar  4 2011 17:46:11: SNMP: Packet sent via UDP to 172.5.5.246

If I run this command from a linux server then I get authinicated with the Cisco Router and a bunch of information from the SNMP sub system.

# snmpwalk -d -v 3 -a SHA -A password -l authPriv -u netsnmp -x DES -X password 172.5.5.247:161 system

This is the output from the Cisco Router showing that it authenticates the request from the Linux system.

Mar  4 2011 17:47:04: SNMP: Packet received via UDP from 172.5.20.158 on FastEthernet0/0

*Mar  4 2011 17:47:04: 

Incoming SNMP packet

*Mar  4 2011 17:47:04: v3 packet security model: v3 security level: noauth

*Mar  4 2011 17:47:04: username: 

*Mar  4 2011 17:47:04: snmpEngineID: 800000090300001AA1426408

*Mar  4 2011 17:47:04: snmpEngineBoots: 0 snmpEngineTime: 0

*Mar  4 2011 17:47:04: SNMP: Report, reqid 1154144035, errstat 0, erridx 0 

 internet.6.3.15.1.1.4.0 = 9

*Mar  4 2011 17:47:04: SNMP: Packet sent via UDP to 172.5.20.158

*Mar  4 2011 17:47:04: SNMP: Packet received via UDP from 172.25.20.158 on FastEthernet0/0

*Mar  4 2011 17:47:04: SNMP: Get-next request, reqid 1154144034, errstat 0, erridx 0 

 system = NULL TYPE/VALUE

*Mar  4 2011 17:47:04: 

Incoming SNMP packet

*Mar  4 2011 17:47:04: v3 packet security model: v3 security level: priv

*Mar  4 2011 17:47:04: username: netsnmp

*Mar  4 2011 17:47:04: snmpEngineID: 800000090300001AA1426408

*Mar  4 2011 17:47:04: snmpEngineBoots: 2 snmpEngineTime: 2749

*Mar  4 2011 17:47:04: SNMP: Response, reqid 1154144034, errstat 0, erridx 0 

 system.1.0 = Cisco IOS Software, 2800 Software (C2800NM-IPVOICEK9-M), Version 12.4(25d), RELEASE SOFTWARE (fc1)

*Mar  4 2011 17:47:04: SNMP: Packet sent via UDP to 172.5.20.158

*Mar  4 2011 17:47:04: SNMP: Packet received via UDP from 172.5.20.158 on FastEthernet0/0

*Mar  4 2011 17:47:04: SNMP: Get-next request, reqid 1154144036, errstat 0, erridx 0 

 system.1.0 = NULL TYPE/VALUE

*Mar  4 2011 17:47:04: 

Incoming SNMP packet

*Mar  4 2011 17:47:04: v3 packet security model: v3 security level: priv

*Mar  4 2011 17:47:04: username: netsnmp

*Mar  4 2011 17:47:04: snmpEngineID: 800000090300001AA1426408

*Mar  4 2011 17:47:04: snmpEngineBoots: 2 snmpEngineTime: 2749

*Mar  4 2011 17:47:04: SNMP: Response, reqid 1154144036, errstat 0, erridx 0 

 system.2.0 = products.576

*Mar  4 2011 17:47:04: SNMP: Packet sent via UDP to 172.5.20.158

CML-TEST-2811(config)#

*Mar  4 2011 17:47:04: SNMP: Packet received via UDP from 172.5.20.158 on FastEthernet0/0

*Mar  4 2011 17:47:04: SNMP: Get-next request, reqid 1154144037, errstat 0, erridx 0 

 system.2.0 = NULL TYPE/VALUE

*Mar  4 2011 17:47:04: 

Incoming SNMP packet