Re: kern/46961: Please support BCM57762 Ethernet arapter(Apple'sThunderbolt Ethernet Adapter)

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

The following reply was made to PR kern/46961; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: david%l8s.co.uk@localhost
Cc: gnats-bugs%NetBSD.org@localhost, tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: kern/46961: Please support BCM57762 Ethernet 
arapter(Apple'sThunderbolt
         Ethernet Adapter)
Date: Tue, 18 Sep 2012 23:24:59 +0900

 >  > >  One possibility is for supporting PPPoE.
 >  > 
 >  > I've already checked that sys/net/if_pppoe.c has:
 >  > >> #define PPPOE_MAXMTU   (ETHERMTU - PPPOE_OVERHEAD)
 >  >  :
 >  > >>        sc->sc_sppp.pp_if.if_mtu = PPPOE_MAXMTU;
 >  > so I guess pppoe packets won't be larger than ETHER_MAX_LEN.
 >  
 >  Not usually, but it would be very useful to allow the encasulation
 >  of full sized ethernet packets.
 >  Some routers (and ISP side kit) support it.
 
 If such optional encapsulation that requires hardware and
 driver support isn't defined in MI sys/net/if_ether.h,
 it means "we don't support it" and no worth to tweak
 individual drivers for it (and it isn't relevant to this PR).
 
 Please open a new PR if you really want to support new features.
 ---
 Izumi Tsutsui