Re: [Devmon] Help with new Template - Index processing

[Buchan M. <bg...@st...>]

On Tuesday, 9 August 2011 22:53:00 White, Bruce wrote:
> Hi all,
> 
> Can anyone take pity on me and give me a hand getting my oids,
> transforms, and message file to work with the below scenario?  This is
> my first new template>  I have gotten the cpu and memory tests working
> including the graphs, they reference a series of single (leaf) oids, no
> repeating data and no need to access data via an Index. I am running
> Devmon 0.3.1.-beta1.

How did you create this template? From scratch?

For Cisco-based networking equipment, it is usually easiest to copy a template 
for a similar device. The only complication is that some devices use IF-MIB v1 
(with no ifName or ifAlias, but with an ifDescr), where others use IF-MIB v2. 
On Cisco devices, ifName and ifDescr are similar, but differ in the 
abbreviations of interface names, and ifAlias typically contains the port 
'description'.

> I have been spinning my wheels for two days. Here is the setup.  I have
> a table in the MIB which is not indexed by a sequence of 1, 2, 3, etc.

This is not  a requirement. Devmon should work with any SNMP table, regardless 
of the index values and whether they are monotonic, sequential etc., as long 
as they are unique.

> but based on number which appears to drop from the sky.  This number
> however can be found in the ifIndex table by the same index number.
> 
> So the first entry in ifIndex is 151126017 and at
> 1.3.6.1.2.1.2.2.1.1.151126017 you will obtain the integer 151126017.
> Like:
> 
> ifIndex.151126017 = INTEGER: 151126017

This is standard for IF-MIB.

> If you use this number to access the ifName table you will get the name
> of the port on the switch.  Like:
> 
> ifName.151126017 = STRING: Vlan1
> 
> I can pull these individual entries via devmon from the MIB with
> hardcoded oids and using the leaf type.  That is of little use.  I can
> not figure out the proper syntax for the INDEX transforms entry to pull
> the full set of ifIndex entries nor how to format the proper transforms
> entries to use those Index entries to access the entries in the MIB for
> the ifName table.   I have tried many different entries for the INDEX
> and CHAIN transforms with no luck.  Usually I end up with an error
> message "Missing repeater data for primary OID <variable>"

You shouldn't need to use INDEX or CHAIN here.

> When using snmpwalk I can get the data just fine. Pointing snmpwalk at
> oid 1.3.6.1.2.1.2.2.1.1 for the ifIndex field I get back:
> 
> IF-MIB::ifIndex.151126017 = INTEGER: 151126017

[...]

> IF-MIB::ifIndex.436756480 = INTEGER: 436756480
> 
> When using snmpwalk I can get the data just fine. Pointing snmpwalk at
> oid 1.3.6.1.2.1.31.1.1.1.1 for the ifName field I get back:
> 
> IF-MIB::ifName.151126017 = STRING: Vlan1

[...]

> IF-MIB::ifName.436756480 = STRING: Ethernet2/7
> 
> For grins here are the ifInOctets entries which uses the same set of
> index numbers:
> 
> IF-MIB::ifInOctets.151126017 = Counter32: 11511941

[...]

> IF-MIB::ifInOctets.436756480 = Counter32: 52874384

So far, this looks like a standard network device, using standard IF-MIB v2 
conventions.

Have you tried just copying all the if_* tests from e.g. the cisco-7206 or 
cisco-6509 template? If so, and things didn't work, could you provide more 
detail?

Regards,
Buchan