Could any kind people enlighten me more on the optimum PPPoE/PPPoA and MTU settings should be for Zen ADSL? My business service connects with PPPoE, encapsulation type LLC/SNAP and 1500 MTU; however my residential service uses PPPoA, encapsulation type VC MUX and an MTU of 1498. In their setup guides, Zen mention that either PPPoE or PPPoA can be used but not which is preferential (I understand PPPoA has slightly less overheads compared to PPPoA). However, they don't mention anything about MTU. On this business connection this is set at 1500. The max that my residential connection will go to is 1498, which is odd since I thought that due to overheads on PPPoE (which my business connection is on), a PPPoA of higher than 1498 is not possible?
I have actually changed my residential MTU down to 1486, as this seem to provide slightly lower latency and packet loss. Whether this is just coincidence I'm not sure?
Zen business broadband + line rental ADSL 15/1 (ish) on Draytek 2860.
Zen residential broadband + line rental ADSL 1.8/0.7 (ish) on Draytek 2860.
3 WISP broadband 20/10 also on Draytek 2860 (via Huawei modem) operating in load-balance/fallover mode with Zen.