RE: overwrite standard mib2/interfaces

permalink · #1 (**permalink**) 02-02-2008

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Hi and thanks for the response,
Since it is not possible to add our own rows to the ifTable right now and we
don't know when this feature can be added to the net-snmp, I think it should
be nice and helpful to know the way to disable/exclude ifTable on net-snmp
and do everything in our subagent?

Thanks,

/Masoud

-----Original Message-----

From: "Mike Ayers" <mike_ayers@tvworks.com>

To: "Masoud Fatollahy" <masoudf@t2data.se>,
<net-snmp-users@lists.sourceforge.net>,
<net-snmp-coders@lists.sourceforge.net>

Date: Fri, 1 Feb 2008 10:38:12 -0800

Subject: RE: overwrite standard mib2/interfaces

> From: net-snmp-users-bounces@lists.sourceforge.net

> [mailto:net-snmp-users-bounces@lists.sourceforge.net] On

> Behalf Of Masoud Fatollahy

> Sent: Thursday, January 31, 2008 7:24 AM

> We are planning to find the best possible way to register our

> ports as interface in mib2/interfaces(if-mib/ifTable) table

> on net-snmp-5.4.1. since these ports are not seen by the

> linux system then we should include them to the interface

> list ourselves, but the idea is to keep net-snmp as it is and

> do not modify anything(modify as little as possible). in

> order to do this we have decided to use a sub-agent and

> AgentX to talk to net-snamp agent. the question is:

> How can we do this to achieve our goal?

> A answer which we are looking at right now is that remove

> registration of MIB2/Interfaces(if-mib/ifTable) and use our

> subagent to register all interface mibs and callbacks functions.

> Since you are the experties, I want to know your idea about this?

There is no need to clobber the entire ifTable. Simply register a row
for each port. You'll need to register each object in each row
individually, which is a bit of a pain, but that's the only real problem. I
don't know if there are helpers for this. I would recommend using very
large numbers for your ifIndex to keep clear of those generated by the MIB
module.

Hopefully, the ifTable implementation has a way to cooperatively add your
own rows, but I've never examined it. Anyone?

Thanks,

Mike

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<font style="font-family: tahoma; font-size: 10pt;"><div style="font-family:
tahoma; font-size: 10pt;">Hi and thanks for the response,</div><div>Since it
is not possible to add our own rows to the ifTable right now and we don't
know when this feature can be added to the net-snmp, I think it should be
nice and helpful to know the way to disable/exclude ifTable  on
net-snmp and do everything in our subagent? </div><div> </div><div>
Thanks,</div><div> </div><div>/Masoud<br> </div></font> <br>
<blockquote style="border-left: 2px solid rgb(0, 0, 0); padding-right: 0px;
padding-left: 5px; margin-left: 5px; margin-right: 0px;"> -----Original
Message-----<br> From: "Mike Ayers" <mike_ayers@tvworks.com><br> To:
"Masoud Fatollahy" <masoudf@t2data.se>,
<net-snmp-users@lists.sourceforge.net>,
<net-snmp-coders@lists.sourceforge.net><br> Date: Fri, 1 Feb 2008
10:38:12 -0800<br> Subject: RE: overwrite standard mib2/interfaces<br> <br>
<div style="font-family: monospace,courier new,courier;"> > From:
net-snmp-users-bounces@lists.sourceforge.net <br> >
[mailto:net-snmp-users-bounces@lists.sourceforge.net] On <br> > Behalf Of
Masoud Fatollahy<br> > Sent: Thursday, January 31, 2008 7:24 AM<br> <br>
> We are planning to find the best possible way to register our <br> >
ports as interface in mib2/interfaces(if-mib/ifTable) table <br> > on
net-snmp-5.4.1. since these ports are not seen by the <br> > linux system
then we should include them to the interface <br> > list ourselves, but
the idea is to keep net-snmp as it is and <br> > do not modify
anything(modify as little as possible). in <br> > order to do this we
have decided to use a sub-agent and <br> > AgentX to talk to net-snamp
agent. the question is:<br> > How can we do this to achieve our goal? <br>
> A answer which we are looking at right now is that remove <br> >
registration of MIB2/Interfaces(if-mib/ifTable) and use our <br> >
subagent to register all interface mibs and callbacks functions. <br> >
Since you are the experties, I want to know your idea about this?<br> <br>
   There is no need to clobber the entire ifTable.  Simply
register a row for each port.  You'll need to register each object in
each row individually, which is a bit of a pain, but that's the only real
problem.  I don't know if there are helpers for this.  I would
recommend using very large numbers for your ifIndex to keep clear of those
generated by the MIB module.<br> <br>    Hopefully, the ifTable
implementation has a way to cooperatively add your own rows, but I've never
examined it.  Anyone?<br> <br> <br>    Thanks,<br> <br>
Mike<br> </div> </blockquote> </body>
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