MTU for PPPoE connection into ADSL modem?

[Christmas themed thank]

Dear all,

I have put our TalkTalk-provided Huawei HG523a into bridge mode so we can use our router, the TP-LINK-WDR3600, to connect via PPPoE to the modem so we can access the internet.

What I would like to know is: what MTU should I be setting for the connection in the router? TalkTalk uses an MTU of 1432 for PPPoA connections. Is this the same when connecting via PPPoE like we are here?

 

[#Chri5#]

Not tried that combo but I always go for 1492 when using a Vigor 120 and a SonicWall with PPPoE.

 

[Westyfield2]

1492 is the norm for PPPOE (1500 subtract 6 octets of PPPoE header is and 2 octets of PPP protocol ID).