Oops...
I forgot to say that I don't have the IP address of the attached device.
I have ALL IP addresses, but I don't know whom is attached to whom...
And yes, I can control the setup, but my ultimate goal is to manage less.
The only way I see this possible, is by broadcasting "something" to the
wire, that doesn't go beyond the next radio, and returns the MACs of the
"wired" devices.
Thanks!
ET
Tony Wasson writes:
> On Tue, Apr 14, 2009 at 10:52 AM, kitepilot@kitepilot.com
> <kitepilot@kitepilot.com> wrote:
>> So I want to map my network "on the fly".
>> This is what I already know:
>> Radios are Wiligear (embedded Linux)
>> I have a script that logs in into every radio and downloads its
>> configuration file, MAC and IP address.
>>
>> From the configuration file I can tell APs from bridges.
>>
>> I can login in every AP and grab the list of MAC addresses associated to
>> that AP.
>> I can find the corresponding IP address of a MAC with a lookup into the ARP
>> table of the firewall.
>> Now I can login to those bridges too.
>> So far so good...
>>
>> Now the challenge:
>> When I login to the bridge, I need to know the MAC address of the device
>> attached to the eth0 interface.
>> How do I find the MAC address of the device in the other side of the wire?
>> Thanks!
>> ET
>
> SNMP can help here. See if you can snmpwalk the units. (change the IP
> and community name)
>
> $ snmpwalk -v1 -c your-community-name 192.168.1.50 1.3.6.1
>
> On a typical SNMP device you can get the forwarding tables like so:
>
> $ snmpwalk -v1 -c your-community-name 192.168.1.50 1.3.6.1.2.1.17.4.3.1.2
>
> You can usually tie that information together with the interface names
> located at this OID:
> 1.3.6.1.2.1.2.2.1.2
>
> I've got a script that will dump the mappings I can share offlist if
> you're interested. I use it to dump all the MAC to port mappings into
> a database table and then generate a map. If that isn't working, you
> could also dump the arp tables of the WiFi units periodically. Doing
> that in conjuction with an nmap ping sweep will allow you to "find" a
> good chunk of devices.
>
> Hope this helps,
> Tony Wasson
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us
> To subscribe, unsubscribe, or to change your mail settings:
> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
---------------------------------------------------
PLUG-discuss mailing list -
PLUG-discuss@lists.plug.phoenix.az.us
To subscribe, unsubscribe, or to change your mail settings:
http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
(text/plain)