On 10/15/10, Sujit K M <sjt.kar@xxxxxxxxx> wrote: >> In case of ISP has single access point, it has one source MAC for all >> network, right? If such AP is buggy and give two(or more) equal >> session_id's to several clients, this cause situation I described >> above. > > I am still not clear. The session_id will have an unique value for the pppoe > connection. I think It will be a part of > 1. The handshake that goes on > 2. Crytography for the device(specific to the modem). > > Even If 2 fails, 1 Should fix it(be it single/multiple). > Once more - this is how it should be done by RFC. But due to buggy ISP hardware uniqueness of session_id violated! Client doesn't know anything about other clients connected to the ISP, so it can't fix anything. Also I don't understand you - how cryptography relates to PPPoE frame header. -- To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html