Using your input this is what I come up with: any more comments appreciated :)
Advania-Traps-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
DisplayString, enterprises FROM SNMPv2-SMI;
-- Module identity
advania MODULE-IDENTITY
LAST-UPDATED "201404090000Z"
ORGANIZATION "Advania hf"
CONTACT-INFO "Aki Barkarson - a...@advania.is"
REVISION "201404090000Z"
DESCRIPTION
"This revision of this MIB module was published as
a test for custom traps."
DESCRIPTION "Intended for internal Advania use only."
::= { enterprises 1513 }
-- Structure
traps1 OBJECT IDENTIFIER ::= { advania 1 }
objects OBJECT IDENTIFIER ::= { traps1 1 }
notifications OBJECT IDENTIFIER ::= { traps1 2 }
-- sub-id zero for SNMPv1 compatibility
notificationsPrefix OBJECT IDENTIFIER ::= { notifications 0 }
-- Objects
trapState OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..31))
MAX-ACCESS notify
STATUS current
DESCRIPTION
"A brief description."
::= { objects 1 }
shortMsg OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..31))
MAX-ACCESS notify
STATUS current
DESCRIPTION
"A brief description."
::= { objects 2 }
longMsg OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..1279))
MAX-ACCESS notify
STATUS current
DESCRIPTION
"Detailed info."
::= { objects 3 }
-- Notifications
customTrap NOTIFICATION-TYPE
STATUS current
VARIABLES { trapState, shortMsg, longMsg }
DESCRIPTION "Custom trap alert."
::= { notificationsPrefix 1 }
END
Áki Hermann Barkarson
Sérfræðingur / Service Engineer
CCDP / CCIE # 27552
Skilmálar/Disclaimer
-----Original Message-----
From: Olivier Miakinen [mailto:om+net-s...@miakinen.net]
Sent: 8. apríl 2014 22:04
To: Áki Hermann Barkarson; net-snmp-users@lists.sourceforge.net
Subject: Re: creating custom mib
Hello Áki Hermann,
Le 08/04/2014 01:45, Áki Hermann Barkarson a écrit :
>
> [...]
>
> To learn more about this I want to create my own MIB and I have an
> enterprise OID (1513) that I can use.
>
> So I send traps with SNMPv2-SMI::enterprises.1513.... and passing
> along some variable and this is where I'm struggling with syntax and
> general lack of understanding. I want to format my mib in the correct
> way..
I wrote mibs a few years ago, and I think I can give you some advice, but
probably I will forget things, and maybe I will be wrong on some points. I hope
others would correct me if needed.
> maybe it should be split down into one mib defining objects and then I
> define the notifications in another mib..
I believe it is not necessary to write two separate mibs.
> and and.. so many
> questions :) I can see various examples out there but I'd love to have
> a conversation with someone who actually knows this stuff.
>
>
> This is what I have so far:
>
>
> Advania-Traps-MIB DEFINITIONS ::= BEGIN
Ok.
>
> IMPORTS
> enterprises FROM RFC1155-SMI
This is the old deprecated SMIv1 version of the SNMP syntax. You should import
enterprises from SNMPv2-SMI instead, and don't forget the ';' at the end of the
IMPORTS clause.
But also, you need to import the OBJECT-TYPE, DisplayString and
NOTIFICATION-TYPE that you use, and the MODULE-IDENTITY macro that you ought to
use. ;-)
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
DisplayString, enterprises FROM SNMPv2-SMI;
>
> advania OBJECT IDENTIFIER ::= { enterprises
> 1513 }
I think that advania could be defined to be the one and only MODULE-IDENTITY of
the mib, especially if this mib will be the only one (or the main) mib under
enterprises 1513.
Though, I prefer not taking the responsibility of this choice.
You may read the standard, and wait for other answers, before deciding what to
do.
<http://tools.ietf.org/html/rfc2578#section-5>
<http://tools.ietf.org/html/rfc2578#section-5.6>
> objects OBJECT IDENTIFIER ::= { advania 1 }
> notifications OBJECT IDENTIFIER ::= { advania 2 }
Unless you are absolutely sure that the traps will never been generated using
SNMPv1 protocol but only SNMPv2c or SNMPv3 -- and even if you are sure of that
-- it would be highly desirable that you define a prefix with a sub-id having
the value zero for the notifications :
<http://tools.ietf.org/html/rfc2578#section-8.5>
Hence :
objects OBJECT IDENTIFIER ::= { advania 1 }
notifications OBJECT IDENTIFIER ::= { advania 2 }
notificationsPrefix OBJECT IDENTIFIER ::= { notifications 0 }
>
> -- Objects
>
> trapState OBJECT-TYPE
> SYNTAX DisplayString (SIZE (0..31))
> MAX-ACCESS read-write
> STATUS current
> DESCRIPTION
> "A brief description."
> ::= { msg 1 }
{ objects 1 } I suppose
>
> shortMsg OBJECT-TYPE
> SYNTAX DisplayString (SIZE (0..31))
> MAX-ACCESS read-write
> STATUS current
> DESCRIPTION
> "A brief description."
> ::= { msg 1 }
{ objects 2 } I suppose
>
> longMsg OBJECT-TYPE
> SYNTAX DisplayString (SIZE (0..1279))
I'm not sure whether it is allowed to redefine a DisplayString with a maximum
size greater than 255. What is the opinion of other readers of this mailing
list ?
> MAX-ACCESS read-write
> STATUS current
> DESCRIPTION
> "Detailed info."
> ::= { msg 2 }
{ objects 3 } I suppose
Also, if these objects are not actual objects than can be read and written
independently of traps, the MAX-ACCESS should probably be accessible-for-notify
and not read-write.
>
>
> -- Notifications
>
> customTrap NOTIFICATION-TYPE
> STATUS current
> VARIABLES { trapState, shortMsg, longMsg }
> DESCRIPTION "Custom trap alert."
> ::= { notifications 1 }
{ notificationsPrefix 1 }
(see above, about the required zero subid)
>
> END
>
> Not sure if this is how it's meant to be formatted, any help would be
> appreciated..
I hope other answers will follow mine.
Best regards,
--
Olivier Miakinen
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