Nastaveni rychlosti ethernetove linky

[Jan Kasprzak]

	Dobry den,

kvuli nejakym pokusum jsem potreboval nastavit svoji ethernetovou kartu
misto 1Gb/s na 100Mb/s a zjistil jsem, ze to neumim nebo to nefunguje.
Zkusil jsem rychlost natvrdo:

	ethtool -s eth0 speed 100

i menit seznam nabizenych rychlosti pro automaticke vyjednavani:

	ethtool -s eth0 advertise 0xf

Neco se zrejme k ethernetove karte dostalo, protoze v obou pripadech
restartovala vyjednavani (v logu kernelu i v logu switche bylo zaznamenano
link down a pak link up), ale rychlost se vratila vzdy na 1Gb/s a seznam
nabizenych rychlosti podle ethtool se nezmenil:

Settings for eth0:
	Supported ports: [ TP MII ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Supports auto-negotiation: Yes
	Advertised link modes:  10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Advertised auto-negotiation: Yes
	Speed: 1000Mb/s
	Duplex: Full
	Port: MII
	PHYAD: 0
	Transceiver: internal
	Auto-negotiation: on
	Supports Wake-on: pumbg
	Wake-on: g
	Current message level: 0x00000033 (51)
	Link detected: yes

	Kdyz jsem na switchi nastavil rychlost portu na auto-100,
restartovalo se vyjednavani a dohodli se na 100Mb/s podle ocekavani.

	Co delam spatne? Podle lspci je sitova karta tato:

Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)

	Diky,

-Yenya

-- 
| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839      Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/    Journal: http://www.fi.muni.cz/~kas/blog/ |
Please don't top post and in particular don't attach entire digests to your
mail or we'll all soon be using bittorrent to read the list.     --Alan Cox