On 12/12/06, Oliver Hookins <[EMAIL PROTECTED]> wrote:
Not quite right, you still have layer 2 frames which are disassembled and reassembled. However your device is operating as a simple ethernet (or ATM if your ISP supports it) bridge rather than also encapsulating the traffic in PPP which is the norm, hence less overheads.
IIRC (and I'm sure someone will correct me if I don't), the famous 1492-byte MTU on DSL connections is caused by the 8 bytes of PPPoE headers taking up part of the 1500-byte ethernet frame. Switching to L2 removes that overhead, which has a few benefits: avoids mysterious MTU issues, means that 1500-byte packets on the ethernet segment don't have to be re-packaged as 1492-byte packets to go over the DSL segment (I think this is what O was talking about), etc. /me sits back and awaits flameage -- There is nothing more worthy of contempt than a man who quotes himself - Zhasper, 2004 -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
