Hello George,

A restart is not necessary, of course. Most likely you did not properly re-add 
the necessary entries?
Why are you changing so many things just to change the security level? 

Best regards,
Frank


> On 06 Nov 2014, at 04:59, George Bachus <[email protected]> wrote:
> 
> Hello,
> 
> I am in the process of implementing an agent that will support both v2 and 
> v3. I have the basic agent running for both these versions. The problem I 
> seem to be having is in v3, when I change the security level.
> Once I change the security level, all requests to the agent from a manager 
> [with new security level settings], get an "unknown user names " error. 
> Basically the authorization fails. 
> Now if I restart the agent, then all is fine. The requests get processed and 
> the response is sent correctly.
> 
> What i would like to know is that, is it necessary to restart the agent when 
> the security level is changed or is it that I am missing a step or two?
> When the security level changes,  I am
> * removing the groups from the VACM MIB
> * removing the access using the old security level
> * adding the groups back again with the new users
> * adding the views back again with the new security level.
> 
> Any insights to this is helpful.
> 
> Thanks,
> George
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