jfmezeiPremium
join:2007-01-03
Pointe-Claire, QC
kudos:22 Reviews:
 ·ELECTRONICBOX
| Adding information to PPPoE packets OK, I know that the Bell BAS router gets the DSLAM port number for a PPPoE session. Not sure if this is just for the PPPoE session establishement phase or if for every packet.
How/where is this information added to the packet ? Is this something added to the ethernet header ? PPPoE header ? Tagged to the end of the packet ?
And more importantly, would it be easy/possible for the BAS to forward that info to the ISP ? |
| The association of a physical port to a session with PPPoE probably doesn't come from a string received by the BRAS. That is to say that neither the client nor an intermediate device sends a port ID usually, just MACs, although he BRAS/LAC also sends its host name.
What is far more likely is that there is a 1:1 vlan:port setup. So the BRAS knows that on Eth0, VLAN 1-1 is Shelf/Slot/Port 1 of Dslam1 MezeiVille CO. There are ways to send information on the originating DSL port to the LNS, perhaps using radius attribute 87, NAS-Port-ID. It resembles DHCP option 82 in that way except the source port ID isn't inserted by the originating switch. |
