CVSROOT: /cvs
Module name: src
Changes by: st...@cvs.openbsd.org 2012/01/18 18:13:20
Modified files:
sys/net : if_pppoe.c if_spppsubr.c
Log message:
Teach pppoe(4) about RFC 4638. This allows negotiating increased MTU with
compatible equipment provided that the physical interface and other layer 2
devices involved support and are configured to use jumbo frames.
Manpage to follow; typical use is to request 1500 MTU for pppoe, this
requires 1508+ MTU on the physical interface, e.g. "ifconfig em0 mtu 1508;
ifconfig pppoe0 mtu 1500". Known to be usable in the UK with some ISPs
(e.g. aaisp) using BT FTTC backhaul.
>From Matt Dainty, originally based on support in NetBSD, changed to
decouple pppoe from physical interface MTU. Tested with UK FTTC by Matt,
no regressions on my standard UK ADSL setup or yasuoka@'s setup (in Japan,
NTT uses 1452 byte MTU for PPPoE and 1500 byte MTU for IPv6 on the same
network).
ok yasuoka@
