[SNMP4J] Re: Pulling Router tables via SNMP

[Charlie Hubbard]

Rory,

Thanks for the info.  Both sites are very helpful.  What my ultimate
goal in doing this is try and map the network by using snmp to figure
out what networks a router is connecting.  I've used some products
that seem to use this same approach so I figured it would be doable.
Do you have any other insight in how I might accomplish this goal?

So SNMP4J doesn't parse MIBs and that's why I need mibble?

Thanks
Charlie

On 10/10/06, Rory Marquis <roridge at hotmail.com> wrote:
> Hi there
>
> Im not sure if what you are asking would be posssible in the way that you
> might be thinking.  (Although I am sure that someone will correct me if I am
> worg.
>
> The only way that a router that supports SNMP could tell you the routing
> tables would be if it had a MIB that would provide you with this
> information.
>
> You said that you have read the RFC, and I agree at first they are difficult
> to follow. The thing is there might be LOTS of RFCs for the MIBs of your
> routers/switches there also might be private MIBs for the routers that are
> manufacture specific (in fact i can guraentee that there are).
>
> My advice to you is to do some more research. Start small just by using an
> OID from something like the HOST-RESOURCES-MIB or the SNMPv2-MIB or
> something like that and throw it at the router to see if it A: implements
> SNMP (some don't, honest) and B: that you can talk to it.  Then what I would
> do is download the MIB from the RFC and parse it using something like Mibble
> http://www.mibble.org/. There is an excellent tool that the Mibble folks
> have created which will parse MIBs for you, and send SNMP messages... it's a
> good tool to use if you are just playing around.
>
> Then I would go searching for more MIB information regarding your specific
> Routers. If they are Cisco you are in luck, take a look in the Mib Depot
> http://www.mibdepot.com/index.shtml
>
> HTH
>
> Cheers
> Rory
>
>
>