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Re: [netmod] Last Call: draft-ietf-netmod-snmp-cfg-03 (20131220)

"Randy Presuhn" <randy_presuhn@mindspring.com> Mon, 06 January 2014 23:13 UTC

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From: Randy Presuhn <randy_presuhn@mindspring.com>
To: netmod@ietf.org
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Subject: Re: [netmod] Last Call: draft-ietf-netmod-snmp-cfg-03 (20131220)
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Hi -

> From: "Martin Bjorklund" <mbj@tail-f.com>
> To: <randy_presuhn@mindspring.com>
> Cc: <netmod@ietf.org>
> Sent: Monday, January 06, 2014 1:53 PM
> Subject: Re: [netmod] Last Call: draft-ietf-netmod-snmp-cfg-03 (20131220)
...
> What do you mean by a "group which does not exist"?  
> 
> Maybe you can provide an example (MIB) configuration that is not
> possible to express in the YANG model?  (assuming also that we remove
> the min-elements constraint from the "member" list).

Sure.  An instance of  vacmGroupName with value "TBD",
when no entry exists in vacmAccessTable with such a value.
Note that this is explicitly permitted by the definitions of
vacmGroupName.

> > If VACM has been configured with one or more users referring
> > to groups that don't happen to exist at the moment, a fairly
> > reasonable thing to do, the Yang/Netconf interface cannot
> > represent that configuration.
> 
> If you mean an entry in vacmSecurityToGroupTable with a vacmGroupName
> that does not exist in vacmAccessTable, this is possible to express
> with the YANG model.

Cool.  I couldn't see how the Yang model would allow it, since the list "member"
is contained by the list "group".  Could you explain how one could create
a "member" without creating the containing "group"?

Randy

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