Hi,
Assuming I have AgentX tweak with all the contexts set up, can I do one
snmpwalk at the main node for the whole cluster?
snmpwalk -c public <main node ip>
Or am I only be able to walk one node at a time with the right context for each
node?
Thanks,
Phong
________________________________
From: Dave Shield <d.t.shi...@liverpool.ac.uk>
To: Alexandre James <aja...@sandvine.com>
Cc: Nguyen Dinh Phong <ndph...@yahoo.com>;
"net-snmp-coders@lists.sourceforge.net" <net-snmp-coders@lists.sourceforge.net>
Sent: Wednesday, November 2, 2011 9:43 AM
Subject: Re: snmp in cluster
On 2 November 2011 15:59, Alexandre James <aja...@sandvine.com> wrote:
> Is this arrangement actually compliant? ie Is it perfectly valid for different
> contexts/communities to return different values for the same oids?
It's certainly a valid use of contexts.
Indeed - this is the whole point of having contexts at all.
See RFC 3411, section 3.3.1 for details.
The situation wrt communities is a little less clear-cut,
but I can't spot anything that would forbid such an approach.
The Net-SNMP agent provides a mechanism for mapping
community strings to a non-default context. Particularly
when using proxy mapping to another agent.
> Also, does net-snmp provide this functionality or did you do the
> implementation yourself?
Most of the agent MIB modules are coded to register information
in the default context (only). So you'd need to tweak the code
to provide alternate registrations in a different context.
But you'd need to do this to report different data anyway.
If you're working with AgentX subagents, then these can probably
be tweaked to register and operate with a different context throughout.
But it's not something I've actually done myself (and it's pretty busy at
work, so I don't have much spare time at the moment). You'll probably
need to play about with things a bit to get it working.
Dave
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