Re: Problem related to OID representation

"Dave Shield" <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <[email protected]>
On 14/02/07, [email protected] <[email protected]> wrote:
>Suppose for "1.2.3.4.5.6.1.1.2.abc.1"
>
> I should be sending "1.2.3.4.5.6.1.1.2.97.98.99.1"

Close.
    1.2.3.4.5.6.1.1.2.3.97.98.99.1

You can only use IMPLIED (i.e. no length octet) with the *last*
index.  Everything else must have an explicit length.
Otherwise, consider

    1.2.3.4.5.6.1.1.2.3.97.98.99.100

Is this a full OID with indexes "abc" and 100,
or is it a partial OID with index "abcd" and no integer index?

[That all assumes a variable-length string value.
 Fixed-length strings are handled differently.
 See the RFC for details]

> what if other index is IP address .

See the RFC.

> In case of index as mac address .How  OID will be represented ?

See the RFC

> In case of IP address index what will be the OID representation .

See the RFC


> If the index is not implied then for table which need two column as index
> what will be the OID representation.

See the RFC

> For example 1.2.3.4.5.6.1.1.2.abc.xyz
>
> Will it be 1.2.3.4.5.6.1.1.2.3.97.98.99.3.120.121.122

Yes.

> Or it will be 1.2.3.4.5.6.1.1.2.6.97.98.99.120.121.122

No.
(Not unless the index values are defined as *always*
being exactly three characters long).

With this second encoding, how could an SNMP
program tell the difference between indexes of:

   "a"  and "bcxyz"
   "ab"  and "cxyz"
   "abc"  and "xyz"
   "abcx"  and "yz"
   "abcxy"  and "z"
or even
   "abcxyz"  and ""
   "" and "abcxyz"
?


Dave

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