tech-lists wrote: > On 30/09/2016 16:49, tech-lists wrote: >> Hello misc@ >> >> If I had this arrangement: >> >> openbsd re0 --- unmanaged gigabit switch --- vdsl modem offering PPPoE >> >> can I expect pppoe0 on the openbsd box to be able to communicate with >> the modem and bring the line up? > > It seems the answer to this is YES. Not sure how it works though. Maybe > something to do with ARP? >
Hello, According RFC2516, the discovery phase is based on usual broadcast and unicast raw ethernet packets before the communication phase which is also on raw ethernet. So... you won't have problems with your modem which is configured as a bridge : everything's control is based MAC addresses including your dumb switch. You'll get your ISP's access server directly on your switch. And my last sentence is where you'll get "problems" with your ISP ! It will append if you're leaking undue ethernet packets to the PPPoE gateway : any broadcast or anything unknown to your dumb switch will be submitted to your ISP's good will. So... don't make your ISP grumpy. ;-) You better have to use a not-so-dumb switch on which you can affect/group ports all-together (without any VLAN tagging) and isolate them from any other data traffic from other ports. There's always a way to leak something by misconfiguration or by plugin-in other clients on your switch (even if you put red-tape on unused ports... someone will do that one day or another!). Regards, Eric
