I think you have to add L2TP encapsulation overhead as well the PPP(oE) session is encapsulated in a L2TP tunnel from Swisscom's aggregation box to each ISP as far as I remember
--felix. At 08:19 28/03/02 +0100, [EMAIL PROTECTED] wrote: >Hi > >I have seen that MS Exchange Servers behind ADSL have problems >receiving mail from us. (No, no MS here) > >You folks definately know this better but can you tell me >if this is right: > >The MTU is 1500. The ADSL Router adds 8 bits for >encapsulation for PPPoE, this gives a total of 1508. Since >this is more than the 1500, the packet doesnt go thru. The >solution is to reduce the MTU size (on the MS Exchange Machine?) >to 1492. > >Is this about right or am I totally off here? > >Cheers, >Alain > >-----Original Message----- >From: Nicolas STRINA [mailto:[EMAIL PROTECTED]] >Sent: Mittwoch, 27. M�rz 2002 16:00 >To: [EMAIL PROTECTED] >Subject: [swinog] MTU > > >Hello, > >After some problems with aDSL modems ( MTU ), i'd like to know if >someone of you have the same problem or similar. I'd like to know too >what value you are using as MTU on your LNS's. > >Thanks > >Nicolas > > >-- >---------------------------------------- >STRINA Nicolas >VTX Services - Internet Service Provider >Av. de Lavaux 101 CH-1009 Pully >[EMAIL PROTECTED] >http://www.vtx.ch >---------------------------------------- > >---------------------------------------------- >[EMAIL PROTECTED] Maillist-Archive: >http://www.mail-archive.com/swinog%40swinog.ch/ >---------------------------------------------- >[EMAIL PROTECTED] Maillist-Archive: >http://www.mail-archive.com/swinog%40swinog.ch/ ____________________________ Felix Curinga email: [EMAIL PROTECTED] gsm: +41 (0)79.446.38.11 ---------------------------------------------- [EMAIL PROTECTED] Maillist-Archive: http://www.mail-archive.com/swinog%40swinog.ch/
