1

Хочу ограничить скорость подключения со 100 до 10.

при вводе команды c параметром autoneg off

# ethtool -s eth0 speed 10 duplex full autoneg off
Cannot set new settings: Invalid argument
  not setting speed
  not setting duplex
  not setting autoneg

Если параметр убрать, то настройки скорости не меняются.

Если изменить на autoneg on то пропадает соединение, а ethtool eth0 выдает

Settings for eth0:
   Supported ports: [ TP ]
   Supported link modes:   10baseT/Half 10baseT/Full  
                           100baseT/Half 100baseT/Full  
   Supports auto-negotiation: Yes
   Advertised link modes:  10baseT/Full  
   Advertised auto-negotiation: Yes
   Speed: Unknown! (65535)
   Duplex: Unknown! (255)
   Port: Twisted Pair
   PHYAD: 0
   Transceiver: internal
   Auto-negotiation: on
   Supports Wake-on: g
   Wake-on: d
   Current message level: 0x00000000 (0)
   Link detected: no

То есть Speed и Duplex вообще не устанавливаются

Вот данные по карточке из lspci -v

Ethernet controller: Attansic Technology Corp. L2 100 Mbit Ethernet Adapter (rev a0)
   Subsystem: ASUSTeK Computer Inc. Device 8233
   Flags: bus master, fast devsel, latency 0, IRQ 2300
   Memory at fbfc0000 (64-bit, non-prefetchable) [size=256K]
   Expansion ROM at fbfa0000 [disabled] [size=128K]
   Capabilities: [40] Power Management version 2
   Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable+
   Capabilities: [58] Express Endpoint, MSI 00
   Capabilities: [6c] Vital Product Data <?>
   Capabilities: [100] Advanced Error Reporting <?>
   Kernel driver in use: atl2
   Kernel modules: atl2

mii-tool вообще ничего не меняет

sudo mii-tool -v
eth0: negotiated 100baseTx-FD, link ok
  product info: vendor 00:13:74, model 2 rev 2
  basic mode:   autonegotiation enabled
  basic status: autonegotiation complete, link ok
  capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  advertising:  100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control

sudo mii-tool -A 10baseT-FD eth0
restarting autonegotiation...

sudo mii-tool -v
eth0: negotiated 100baseTx-FD, link ok
  product info: vendor 00:13:74, model 2 rev 2
  basic mode:   autonegotiation enabled
  basic status: autonegotiation complete, link ok
  capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  advertising:  100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control

sudo mii-tool -F 10baseT-FD eth0

sudo mii-tool -v
eth0: negotiated 100baseTx-FD, link ok
  product info: vendor 00:13:74, model 2 rev 2
  basic mode:   autonegotiation enabled
  basic status: autonegotiation complete, link ok
  capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  advertising:  100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control

Подскажите, куда копать дальше?

2

Возможно, нет поддержки этой сетевой со стороны этих команд. Можно проверить то же  самое на другой карте, например.