DHCP Support on L2 Switch

Ricardo Stella stella at rider.edu
Wed May 16 12:59:01 UTC 2007

Tim Peiffer wrote:
> We run an internal address tracking method that is accurate to within 2 
> minutes of traffic inception on our net.  We do this by scraping arp 
> tables on the routers, mac-address forwarding tables on switches, and 
> inferring sessions of 'time to the IP to the MAC to the port to the 
> jack/circuit'.  We do this at the scale of approximately 75,000 access 
> ports.  We have searched for years for commercial products to do what we 
> do - none were available that could scale or met our requirements.  DHCP 
> Option-82 in an enforced environment brings all of the above attributes 
> together (date/time, IP, MAC, circuit) and is accurate to within seconds 
> of when the IP traffic comes on the wire.
Is there any of these codes publicly available ?  TIA...



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