This is not ethtool's decision. Maybe the driver is taking the interface down and up.
** Package changed: ethtool (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1395269 Title: ethtool -t eth0 offline loses routing table Status in “linux” package in Ubuntu: Incomplete Bug description: ethtool -t eth0 offline does the tests, but leaves the routing table with only the entry for the local network. I had to sudo route add default gw 10.0.0.1, in my case. The online test didn't do this. Ubuntu 14.04, ethtool 1:3.13-1 Linux tesla 3.13.0-39-generic #66-Ubuntu SMP Tue Oct 28 13:30:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux ethtool -i eth0: driver: e1000e version: 2.3.2-k firmware-version: 1.1-0 bus-info: 0000:00:19.0 relevant kernel log: [637008.472410] e1000e 0000:00:19.0 eth0: offline testing starting [637009.077985] e1000e 0000:00:19.0 eth0: testing unshared interrupt [637022.468941] e1000e 0000:00:19.0: irq 45 for MSI/MSI-X [637022.572094] e1000e 0000:00:19.0: irq 45 for MSI/MSI-X [637022.572257] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [637037.432893] e1000e: eth0 NIC Link is Up 10 Mbps Full Duplex, Flow Control: Rx/Tx [637037.433003] e1000e 0000:00:19.0 eth0: Link Speed was downgraded by SmartSpeed [637037.433005] e1000e 0000:00:19.0 eth0: 10/100 speed: disabling TSO [637037.433035] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [637037.982611] net_ratelimit: 3 callbacks suppressed [637037.982623] IPv4: martian source 10.0.0.17 from 80.73.161.44, on dev eth0 [637037.982628] ll header: 00000000: 00 19 d1 11 b4 9b 00 03 6d 11 34 1b 08 00 ........m.4... (the martian packets are from TCP connections that my router is still NATing to this machine, even though without its routing table, it's not happy to see them.) And yes, my e1000e is autonegotiating to 10baseT/Full on the same cables and switch that still works at 1000baseT with another machine, hence running self-tests... I thought this machine used to run at 1000baseT, weird if I went 5 years without noticing my desktop being slow. Not what this bug report is about, though. The e1000e hardware is on a DG965WH Intel mobo (ICH8 / g965 graphics, first-gen core2) 00:19.0 Ethernet controller: Intel Corporation 82566DC Gigabit Network Connection (rev 02) Subsystem: Intel Corporation Device 0001 Flags: bus master, fast devsel, latency 0, IRQ 45 Memory at e0300000 (32-bit, non-prefetchable) [size=128K] Memory at e0324000 (32-bit, non-prefetchable) [size=4K] I/O ports at 20e0 [size=32] Capabilities: [c8] Power Management version 2 Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Kernel driver in use: e1000e $ ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Full 100baseT/Full 1000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 10Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: on (auto) Cannot get wake-on-lan settings: Operation not permitted Current message level: 0x00000007 (7) drv probe link Link detected: yes Appears to be the same problem as someone reported to Redhat a while ago, which got marked as fixed for the igb driver https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=661976 Not very useful info in their BTS, because the bug that it's a dup of is now flagged private, so nobody can even look at it. Possibly this is a per-driver thing, unless the right fix is to have ethtool save/restore the routing table entries for that iface. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: ethtool 1:3.13-1 ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8 Uname: Linux 3.13.0-39-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 Date: Sat Nov 22 03:00:35 2014 Dependencies: gcc-4.9-base 4.9.1-0ubuntu1 libc6 2.19-0ubuntu6.3 libgcc1 1:4.9.1-0ubuntu1 multiarch-support 2.19-0ubuntu6.3 SourcePackage: ethtool UpgradeStatus: Upgraded to trusty on 2014-07-14 (130 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1395269/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp