MAC address randomly blank
Posted by Jordon Pilling (February 11, 2010 06:08)
Hi all, hope your ok!
We use netscan to audit a branch network (over a 100 vpn's) and we collect all the information and collate on the mac address.
We use the following command link in our loop:
c:\netscan.exe /range:[branch start ip]-[branch end ip] /auto:C:\BranchAudits\BranchAudit.009.csv /xml
This works great, but no matter how i tweak the xml settings, the mac address randomly is blank.
It always resolves host names etc, but the mac addresses sometimes don’t display, yet sometimes its perfect
The netscan is going through a pix firewall, yet our network admin assures me that he is passing macs on (which makes sense seen as sometimes it gets the macs).
its almost as if the mac resolve thing is on its own timeout? (the ping timeouts can vary from 30ms to 2000ms), i have set the ping and host timeouts to 5000, which works great (as i say, all the machines are returned with host names. But the macs dont :s`)
It the mac resolving on its own timeout? if so? is there something i can put in the settings xml to adjust it?
Many thanks!
Jordon
HeavenCore IT Solutions
We use netscan to audit a branch network (over a 100 vpn's) and we collect all the information and collate on the mac address.
We use the following command link in our loop:
c:\netscan.exe /range:[branch start ip]-[branch end ip] /auto:C:\BranchAudits\BranchAudit.009.csv /xml
This works great, but no matter how i tweak the xml settings, the mac address randomly is blank.
It always resolves host names etc, but the mac addresses sometimes don’t display, yet sometimes its perfect
The netscan is going through a pix firewall, yet our network admin assures me that he is passing macs on (which makes sense seen as sometimes it gets the macs).
its almost as if the mac resolve thing is on its own timeout? (the ping timeouts can vary from 30ms to 2000ms), i have set the ping and host timeouts to 5000, which works great (as i say, all the machines are returned with host names. But the macs dont :s`)
It the mac resolving on its own timeout? if so? is there something i can put in the settings xml to adjust it?
Many thanks!
Jordon
HeavenCore IT Solutions
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MAC address randomly blank
Posted by Andrew (February 12, 2010 03:44)
This might a firewall or packet loss issue, although I am not sure. The application uses a standard system call SendARP for MAC address resolution and I don't see any other obvious reasons why it might be failing. As you can see there is no timeout to be specified for this function.
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