Date: Thu, 6 Jun 2019 13:50:19 +0000 (UTC)
From: Vieri <rentorbuy@yahoo.com>
To: Alpine-user <alpine-user@lists.alpinelinux.org>
Message-ID: <258625788.881031.1559829019078@mail.yahoo.com>
Subject: [alpine-user] ethernet link not up
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Hi,

I'm having trouble with ethernet cards and cable length.

This is what I have when I connect an old 100Mbps NIC to a Gbps swith port =
with a short RJ-45 cable (all works fine):=20

# ethtool eth4
Settings for eth4:
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Supported ports: [ TP MII ]
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Supported link modes:=C2=A0=C2=
=A0 10baseT/Half 10baseT/Full
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 100baseT/Half 100baseT/Full
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Supported pause frame use: No
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Supports auto-negotiation: Yes
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Supported FEC modes: Not reporte=
d
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Advertised link modes:=C2=A0 10b=
aseT/Half 10baseT/Full
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 100baseT/Half 100baseT/Full
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Advertised pause frame use: Symm=
etric
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Advertised auto-negotiation: Yes
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Advertised FEC modes: Not report=
ed
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Link partner advertised link mod=
es:=C2=A0 10baseT/Half 10baseT/Full
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 100baseT/Half 100baseT/Full
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Link partner advertised pause fr=
ame use: No
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Link partner advertised auto-neg=
otiation: Yes
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Link partner advertised FEC mode=
s: Not reported
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Speed: 100Mb/s
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Duplex: Full
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Port: MII
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 PHYAD: 24
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Transceiver: internal
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Auto-negotiation: on
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Supports Wake-on: g
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Wake-on: d
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Current message level: 0x0000000=
1 (1)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 drv
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Link detected: yes

# ethtool --driver eth4
driver: 3c59x
version:
firmware-version:
expansion-rom-version:
bus-info: 0000:00:0d.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no

However, when using a slightly longer cable (5-10m) the link speed is not s=
uccessfully negotiated, and the switch port's LED does not light up.

[=C2=A0 105.301478] eth4:=C2=A0 setting half-duplex.
[=C2=A0 105.301736] IPv6: ADDRCONF(NETDEV_UP): eth4: link is not ready

ICMPv4 does not work.

I tried the same cable and the same NIC with another Linux distro, and the =
result was a successful 100Mbps full-duplex link.
Unfortunately, I did not check if this other distro was using the same 3c59=
x driver.

In the meantime, does anyone have any ideas? It's the first time I encounte=
r such a problem (it usually happens with 100+m cables, but not with such a=
 short one -- and I tried two of them just to be sure).

Vieri


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