Public bug reported:
I have a zVM instance with a 1Gb Network device configured:
*-network
description: Ethernet interface
physical id: 1
logical name: enc600
serial: 02:28:0b:00:00:04
size: 10Mbit/s
capacity: 1Gbit/s
capabilities: ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt
1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=qeth_l2
driverversion=1.0 duplex=full firmware=V631 ip=10.245.236.28 link=yes
multicast=yes port=twisted pair speed=10Mbit/s
When checking it under ethtool, I am told it is only 10Mb/s:
ubuntu@hwe0008:~$ ethtool enc600
Settings for enc600:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 10Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Cannot get wake-on-lan settings: Operation not permitted
Link detected: yes
And when checked with mii-tool, I'm told it's 100Mb/s:
ubuntu@hwe0008:~$ sudo mii-tool enc600
[sudo] password for ubuntu:
enc600: 100 Mbit, full duplex, link ok
When in reality, it actually IS 1Gb/s:
ubuntu@hwe0008:~$ iperf3 -c 10.245.128.3
Connecting to host 10.245.128.3, port 5201
[ 4] local 10.245.236.28 port 51412 connected to 10.245.128.3 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 111 MBytes 930 Mbits/sec 0 1.36 MBytes
[ 4] 1.00-2.00 sec 111 MBytes 935 Mbits/sec 3 1.06 MBytes
[ 4] 2.00-3.00 sec 111 MBytes 934 Mbits/sec 0 1.16 MBytes
[ 4] 3.00-4.00 sec 112 MBytes 938 Mbits/sec 0 1.23 MBytes
[ 4] 4.00-5.00 sec 112 MBytes 936 Mbits/sec 0 1.29 MBytes
[ 4] 5.00-6.00 sec 111 MBytes 934 Mbits/sec 7 1000 KBytes
[ 4] 6.00-7.00 sec 111 MBytes 934 Mbits/sec 0 1.06 MBytes
[ 4] 7.00-8.00 sec 112 MBytes 937 Mbits/sec 26 822 KBytes
[ 4] 8.00-9.00 sec 112 MBytes 936 Mbits/sec 0 921 KBytes
[ 4] 9.00-10.00 sec 112 MBytes 936 Mbits/sec 0 1004 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.09 GBytes 935 Mbits/sec 36 sender
[ 4] 0.00-10.00 sec 1.09 GBytes 935 Mbits/sec receiver
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.8.0-36-generic 4.8.0-36.36~16.04.1
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-36-generic s390x
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: s390x
Date: Tue Feb 21 15:50:14 2017
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C
SHELL=/bin/bash
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-hwe (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug s390x xenial
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https://bugs.launchpad.net/bugs/1666679
Title:
ethernet device on zVM instance running 16.04.2 shows incorrect speeds
in ethtool and mii-tool
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