From: John David Anglin <dave.anglin@bell.net>
To: Carlo Pisani <carlojpisani@gmail.com>, linux-parisc@vger.kernel.org
Subject: Re: C8000, which is the max MTU of the built-in net card?
Date: Mon, 23 Sep 2019 07:42:45 -0400 [thread overview]
Message-ID: <905e567a-3e82-969e-8062-5dd4c712929a@bell.net> (raw)
In-Reply-To: <CA+QBN9BepXXQKksDXBn3MpRdzSq3Aq=XzTwDh_F+vVjTvnFpBg@mail.gmail.com>
On 2019-09-23 6:43 a.m., Carlo Pisani wrote:
> I need 2000 MTU, 4000 MTU, 7000 MTU, or 9000 MTU
>
> can someone check the max MTU capability of the built-in lan on a C8000?
My c8000 has an intel e1000:
[ 21.140119] e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI
The driver supports jumbo packets up to 0x3F00:
dave@mx3210:~/linux/linux-stable/drivers/net/ethernet/intel/e1000$ grep MAX_JUMBO_FRAME_SIZE *
e1000_hw.h:#define MAX_JUMBO_FRAME_SIZE 0x3F00
e1000_main.c: netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
e1000_main.c: /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
Dave
--
John David Anglin dave.anglin@bell.net
next prev parent reply other threads:[~2019-09-23 11:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-16 21:50 Bug report (with fix) for DEC Tulip driver (de2104x.c) Arlie Davis
2019-09-17 21:28 ` Andrew Lunn
2019-09-17 21:36 ` Arlie Davis
2019-09-17 22:51 ` John David Anglin
2019-09-18 5:56 ` Helge Deller
2019-09-18 13:27 ` Thomas Bogendoerfer
2019-10-03 1:29 ` Maciej W. Rozycki
2019-09-19 20:31 ` Sven Schnelle
2019-09-23 10:43 ` C8000, which is the max MTU of the built-in net card? Carlo Pisani
2019-09-23 11:42 ` John David Anglin [this message]
2019-09-20 10:43 ` Bug report (with fix) for DEC Tulip driver (de2104x.c) Thomas Bogendoerfer
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