[Xen-users] strange ethtool output in xen environment

[Fasiha Ashraf <feehapk@xxxxxxxxxxx>]

I want to check the speed like features of my Ethernet in dom0 and domUs. But in virtualized environment it gives strange output why is that so? how to check it otherwise?
Non-virtualized FC11
[root@fasiha home]# ethtool eth0
Settings for eth0:
    Supported ports: [ TP ]
    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: 100Mb/s
    Duplex: Full
    Port: Twisted Pair
    PHYAD: 1
    Transceiver: internal
    Auto-negotiation: on
    Supports Wake-on: g
    Wake-on: g
    Current message level: 0x000000ff (255)
    Link detected: yes

Xen Dom0
[root@Server1-FC11 ~]# ethtool eth0
Settings for eth0:
    Link detected: yes
[root@Server1-FC11 ~]# mii-tool eth0
SIOCGMIIPHY on 'eth0' failed: Operation not supported

Xen DomU
[root@F11-G1S1 /]# ethtool eth0
Settings for eth0:
    Link detected: yes

Regards
Fasiha Ashraf

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