Date: Tue, 21 Jul 2015 14:51:48 -0500 From: Karl Denninger <karl@denninger.net> To: freebsd-embedded@freebsd.org Subject: RPI ue[x] problems Message-ID: <55AEA2D4.8090507@denninger.net>
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Raspberry Pi (not the "2"); configuration:
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2015 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.=
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 10.2-PRERELEASE #0 r285132: Sun Jul 5 05:23:06 UTC 2015
root@releng1.nyi.freebsd.org:/usr/obj/arm.armv6/usr/src/sys/RPI-B arm=
FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
VT: init without driver.
CPU: ARM1176JZ-S rev 7 (ARM11J core)
Supported features: ARM_ISA THUMB2 JAZELLE ARMv4 Security_Ext
WB enabled LABT branch prediction enabled
16KB/32B 4-way instruction cache
16KB/32B 4-way write-back-locking-C data cache
real memory =3D 503312384 (479 MB)
avail memory =3D 483221504 (460 MB)
=2E...
ue0: <USB Ethernet> on smsc0
ue0: Ethernet address: b8:27:eb:59:d3:3d
Starting Network: lo0 ue0.
ue0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15=
00
ue1: <USB Ethernet> on axe0
ue1: Ethernet address: 8c:ae:4c:f9:c1:8a
Starting Network: ue1.
ue1: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15=
00
Here's the (set of) problems:
root@IPGw:/home/karl # ifconfig ue0
ue0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15=
00
options=3D80001<RXCSUM,LINKSTATE>
ether b8:27:eb:59:d3:3d
inet 192.168.1.200 netmask 0xffffff00 broadcast 192.168.1.255
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
root@IPGw:/home/karl #
Ok, so we auto-detected 100BaseTX. So far so good. Now set it explicitl=
y:
root@IPGw:/home/karl # ifconfig ue0 media 100BaseTX mediaopt full-duplex
root@IPGw:/home/karl # ifconfig ue0
ue0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15=
00
options=3D80001<RXCSUM,LINKSTATE>
ether b8:27:eb:59:d3:3d
inet 192.168.1.200 netmask 0xffffff00 broadcast 192.168.1.255
media: Ethernet 100baseTX <full-duplex>
status: no carrier
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
root@IPGw:/home/karl #
Heh, where'd it go? Hmmmm.... that's not so good; probably a good thing
I have a second interface and I'm on it eh? Let's turn that back to
"auto"...
root@IPGw:/home/karl # ifconfig ue0
ue0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15=
00
options=3D80001<RXCSUM,LINKSTATE>
ether b8:27:eb:59:d3:3d
inet 192.168.1.200 netmask 0xffffff00 broadcast 192.168.1.255
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
And it's ok again.
Well, sort of ok. It flaps up and down occasionally, which isn't so
good and what got my attention with an attempt to pin it in the first
place. Maybe once an hour it will flip down and back up, which drives
my SNMP monitor NUTS.
It's worse if you have a second adapter on one of the USB ports (and I do=
=2E)
If you DON'T set that one explicitly it will flap incessantly -- every
few minutes. And...
ue1: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15=
00
options=3D80008<VLAN_MTU,LINKSTATE>
ether 8c:ae:4c:f9:c1:8a
inet 70.169.168.97 netmask 0xffffff80 broadcast 70.169.168.127
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
root@IPGw:/home/karl #
OK, so it's full duplex, right? Yes, if you set it auto. But if you
set it to 100baseTX and full-duplex on the options, the switch says no,
you got half-duplex.
root@IPGw:/home/karl # ifconfig ue1 media 100baseTX mediaopt full-duplex
root@IPGw:/home/karl #
root@IPGw:/home/karl # ifconfig ue1
ue1: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15=
00
options=3D80008<VLAN_MTU,LINKSTATE>
ether 8c:ae:4c:f9:c1:8a
inet 70.169.168.97 netmask 0xffffff80 broadcast 70.169.168.127
media: Ethernet 100baseTX <full-duplex>
status: active
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
We think it's full duplex but...
The switch says no, you got half-duplex.....
But at least it's stable and doesn't flap on an every-few-minutes basis
if you set the media type manually.... too bad I can't do that with the
ue0 interface without it failing to connect at all (to the same make and
model switch but on a different network, incidentally.)
Other than that this little $35 computer is remarkably stable running
FreeBSD-PRE and for what it is the performance isn't all that bad. I/O
is slow as molasses but that's what you expect on an SD card. (Lack of a
supported packages repo makes for very long ways in building ports form
source, but thus far what I've built - including SVN so I can track
things -- has worked.)
Build is:
FreeBSD 10.2-PRERELEASE #0 r285132: Sun Jul 5 05:23:06 UTC 2015 =20
root@releng1.nyi.freebsd.org:/usr/obj/arm.armv6/usr/src/sys/RPI-B
Any ideas?
--=20
Karl Denninger
karl@denninger.net <mailto:karl@denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/
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