It seems your SNMP v3 settings are not saved properly... What are the exact changes you're trying to make? Did you try a different browser? A screenshot of the error might be helpful...
Firstly thanks for your reply.
I am attempting to change the "User Access" field to readwrite and add an authentication passphrase. Note if I change the authentication protocol say from SHA to MD5 and get the "Error: invalid authentication protocol encountered" the changed state appears to be saved. That is if I log off and log back on the protocol is still changed to MD5.
I Note the user account snmpv3user appears to be fixed and not managed in the User Configuration.
I have attached screenshots of the settings and the error message.
I also forgot to mention that I have tried several browser versions with no luck:
Linux: firefox 3.0.19
Mac OS X: firefox 3.6.3 and safari 4.0.5
Windows XP: firefox 3.5.3 and internet explorer 6.0
I tried it on my system but didn't encounter your issue... Did you try to go to "Reset v3 Users" and delete all users, and then make your changes again?
Yes I've tried "Reset V3 Users" a few times.