No subject


Wed Jun 18 07:36:42 PDT 2008


...
eth0: (PCI Express:2.5GB/s:Width x1) 00:0f:fe:4a:68:37
eth0: Intel(R) PRO/1000 Network Connection
eth0: MAC: 4, PHY: 6, PBA No: 1002ff-0ff

When plugged into a 10/100/1000 porting, forcing:
ethtool -s eth0 autoneg off speed 1000 duplex full

results in erratic (some pings work) or dead operation (no pings work).

Using:
ethtool -s eth0 autoneg off speed 100 duplex full

seems to work OK.

Returning it to autoneg results in erratic/dead operation:

[root at lyra ~]# ethtool -s eth0 autoneg on
[root at lyra ~]# ethtool eth0
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Full 
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Full 
        Advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pumbag
        Wake-on: g
        Current message level: 0x00000001 (1)
        Link detected: yes
[root at lyra ~]# ping server2
PING server2.domain.avtechpulse.com (192.168.0.3) 56(84) bytes of data.
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=1 ttl=64
time=0.079 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=2 ttl=64
time=0.158 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=7 ttl=64
time=0.161 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=11 ttl=64
time=0.113 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=12 ttl=64
time=0.131 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=17 ttl=64
time=0.127 ms
^C
--- server2.domain.avtechpulse.com ping statistics ---
18 packets transmitted, 6 received, 66% packet loss, time 17553ms
rtt min/avg/max/mdev = 0.079/0.128/0.161/0.028 ms
[root at lyra ~]# 

This was confirmed with multiple 10/100/1000 switches from different
manufacturers.


[root at lyra ~]# more /etc/modprobe.conf
alias eth0 e1000e  #same behaviour with "e1000"
alias scsi_hostadapter libata
alias scsi_hostadapter1 ata_piix
alias snd-card-0 snd-hda-intel
options snd-card-0 index=0
options snd-hda-intel index=0


Need any additional data?

- Mike


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