RE: snmpset on objects failing !!!!

> From: [email protected] [mailto:[email protected]] 
> Sent: Sunday, July 05, 2009 9:24 AM

> papa@nani:~$ snmpset -v 2c -c public localhost ip.ipForwarding.0 i  2
> Error in packet.
> Reason: notWritable (That object does not support modification)
> 
> If this not allowed how should i get the information about 
> thee objects which
> supports read and write.
> I am very much confused by this behavior ( R/W objects not 
> allowing SET
> operations ).

	The definition in the MIB says that this object may be written, but the implementation you have available does not support writes of that object.  Note the definition:

[SNIP]
ipForwarding OBJECT-TYPE
    SYNTAX     INTEGER {
                    forwarding(1),    -- acting as a router
                    notForwarding(2)  -- NOT acting as a router
               }
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "The indication of whether this entity is acting as an IPv4
            router in respect to the forwarding of datagrams received
            by, but not addressed to, this entity.  IPv4 routers forward
            datagrams.  IPv4 hosts do not (except those source-routed
            via the host).

            When this object is written, the entity should save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system.
            Note: a stronger requirement is not used because this object
            was previously defined."
    ::= { ip 1 }
[/SNIP]

	The key is the MAX-ACCESS definition.  This implies that there may be less access available, either due to security restrictions, the MIB not being available on a given host, or, as in your case, the MIB implementation not supporting writes.  If you wish to manage the host forwarding ability via SNMP, you will first need  to either find or write an implementation that can do so.


	HTH,

Mike

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