|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Ethernet EP - MAC Address Filtering
-----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of David McGaugh Sent: Friday, February 08, 2002 3:18 PM To: [email protected] Subject: Ethernet EP - MAC Address Filtering Just curious if anyone is performing MAC Address Filtering at any of the Ethernet Exchange Points. If so has it been found to be easy to administer or difficult where by peers may be changing Layer 3 devices or Interfaces without notice? Alternately is MAC Address Filtering considered an unneeded security measure? Thanks, Dave ---- Speaking of this, is MAC Address filtering [at an IX] really designed to eliminate the possibility of new hardware showing up on the port or is it more the idea of keeping lots of boxes from showing up directly [like hanging another switch off the port]. If its the latter, a seemingly sensible approach would be to limit the number of unique MAC addresses to like 2-4 per port. This way you can change your equipment without prior notice, but you can't (as easily) violate the integrity of the switching fabric. I know for our network ports we limit to no more than 2 unique MACs in a certain time period [~5 minutes or so] which again, allows swapping of equipment without compromising anything that MAC layer filtering is supposed to protect. Deepak Jain AiNET
|