QOS overhead calculations, PPPoE on leased line
Phil Whineray <[email protected]>
| Newsgroups | gmane.comp.security.firewalls.firehol.user |
|---|---|
| Message-ID | <[email protected]> |
Hi I got the following statement about a leased line: > The maximum MTU is 1500 bytes, we do not support Jumbo Framing. > > As the service is Ethernet we only use PPPoE, there is no ATM > encapsulation. Can anyone confirm the following calculation is correct? 2 bytes = PPP 6 bytes = PPPoE 14 bytes = Ethernet --------------- 22 bytes = total overhead So for FireQOS: LINKTYPE="ethernet overhead 22 mtu 1500" I've based it on info I found here: http://ace-host.stuart.id.au/russell/files/tc/tc-atm/ in the section: Overhead and MTU Calculations Cheers Phil