[j-nsp] End host mapping tool

[Chris Kawchuk]

Intermapper does this as part of it's "Layer 2" discovery... 

- Scans a Subnet to find all IP pingable/snmp poll-able devices in a range.
- Gathers all the MAC addresses off your EX switches,
- Looks at the MAC forwarding Table on the EX to see which MAC is out which physical port
- Reads any ARP entries on any routers/switches to do the IP->MAC conversion/lookup.
- Then connects the IP devices it found to the correct physical port on the EX switch visually on the map (also in a easy-to-copy table view)

Commercial software, but pretty nifty. It at least 'gets it right' 90ish% of the time. =)

- Chris.



On 2011-11-28, at 1:15 PM, Dale Shaw wrote:

> Hi all,
> 
> Is anyone aware of open source or COTS software that provides MAC
> address to switch port to IP address (and vice versa) mapping and
> discovery? aka end user / end station tracking.
> 
> There are lots of them out there ('netdisco' being a popular open
> source choice) but I haven't stumbled across one yet that properly
> understands Juniper (JUNOS) bridging MIB(s) supported on EX-series
> such that the MAC/L2 to IP/L3 resolution works properly.
> 
> I've personally tried the cacti 'MacTrack' plugin, as well as the
> relevant module within Statseeker -- neither work as intended. In the
> latter case, there is a product enhancement request logged but I'm
> looking for something in the short term.
> 
> What are you using in your environment to do this?