[unisog] Getting ARP tables from Cisco switches via snmp -- slightly OT

Ben Curran bdc1 at humboldt.edu
Wed Jan 7 21:53:19 GMT 2004


Russell,
Alternately you may run an snmp query tool such as Getif (free) which allows you to 
grab ARP tables, interface information and device MIBS. right clicking on the getif "if" 
tab will allow a copy for cut and paste operations. The tool is also useful for snmp 
"walking" or browsing MIB tables to discover the location of enterprise or vendor 
specific entries. A Google search will produce the tool.

Ben Curran
 

On 8 Jan 2004 at 8:47, Russell Fulton wrote:

> Seasons Greetings to All,
> 
> 
> Does anyone know the  OID to retrieve ARP tables from Cisco switches?
> 
> Background:
> 
> We are working on a project to maintain a map of MAC, IP addrs and
> switch ports in a database that we can easily interrogate (even if the
> machine we are looking for is not on line).  We discovered the need for
> this during the frenzy of patching in the latter part of last year when
> we had frequent problems with tracking down vulnerable machines.
> 
> WE have long maintained a data base built from the ARP tables of the
> routers that allows us to keep track of the mapping on MAC to IP and we
> want to extend this out to the edge switches.
> 
> We can get the data by logging in and using command line functions to
> dump the tables but would much prefer to get the information via snmp. 
> The problem is that we cannot find the OID to access the tables on our
> cisco switches.  We have used snmp_walk to go though the mib but have
> not found anything.  Cisco must be using different naming conventions
> within the min between the routers and switches.  Sigh....
> 
> Cheers and thanks, Russell
> 
> -- 
> Russell Fulton                                    /~\  The ASCII
> Network Security Officer                          \ /  Ribbon Campaign
> The University of Auckland                         X   Against HTML
> New Zealand                                       / \  Email!
> 
> 


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