On 25/04/17 17:27, Stephen Hemminger wrote:
On Fri, 21 Apr 2017 14:39:00 +0200
Rafa Corvillo <rafael.corvi...@aoifes.com> wrote:
We are working in an ARMv7 embedded system running kernel 4.9 (LEDE build).
It is an imx6 board with 2 ethernet interfaces. One of them is connected to
a Marvell switch.
The schema of the system is the following:
+-------------------+ eth0
| +--+
| | |
| Embedded system +--+
| |
| ARMv7 |
| | Marvell 88E8057(sky2) +-------------+
| +--+ +--+ +--+ eth1
| | +---------------------+ | | +------+
| +--+ CPU port +--+ mv88e6176 +--+
+------+--+---------+ | |
emulated| | | |
GPIO +--+ +--+ +--+ eth2
MDIO +-----------------------------------+ | | +------+
MDIO +--+ +--+
+-------------+
There is a bridge (br-lan) which includes eth0/eth1/eth2
If I connect the eth1/eth2, the link is up and I can do ping through it.
But, once
I start sending a heavy traffic load the link fails and the kernel sends the
following messages:
[ 48.557140] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
[ 48.564964] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
[ 48.572110] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
[ 48.579263] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
[ 48.586417] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
[ 48.593573] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
[ 48.600718] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
[ 54.877567] net_ratelimit: 6 callbacks suppressed
[ 54.882293] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
[ 61.413552] sky2 0000:04:00.0 marvell: rx error, status 0x5f20010
length 1518
The status error bits are in sky2.h
0x5f20010 is
05f2 frame length => 1522
0010 Too long err
That means the packet was longer than the configured MTU.
You are probably getting packets with VLAN tag but have not configured
a VLAN.
Thanks for the information. I have increased the MTU value to 1550
(workaround) and it works if sends traffic (with iperf) from my computer
to the unit. But, if I send traffic outside the unit, I get a new error
message and link goes down:
[ 4901.032989] sky2 0000:04:00.0 marvell: tx timeout
[ 4904.722670] sky2 0000:04:00.0 marvell: Link is up at 1000 Mbps, full
duplex, flow control both
Rafa
