Hi Pan,

> Greetings,
> 
> Color me perplexed.
> 
> We just purchased a new compute node for our computing cluster. All the
> compute nodes are currently running SL4.4 x86_64 and are interconnected
> on the 192.168.1.0 private network.
> 
> I have a clean install of SL5 x86_64 (from CDs) on the new box. The only
> software selection I checked was [X] GUI Server (I may have the word
> order or capitalization wrong).
> 
> The box has two NICs. eth0 is configured for the private network, and
> eth1 is set to DHCP, not active on boot (and it's not connected to
> anything).
> 
> Of the "first boot" selections, the only thing I changed was to disable
> the firewall.
> 
> When I found I couldn't ping the gateway, I immediately rebooted ('cause
> I'm lazy and I wasn't sure disabling the firewall "took"). No change.
> 
> Here's some hopefully relevant information:
> 
> [root@kappa ~]# /sbin/ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:A0:D1:E5:E9:EC
>           inet addr:192.168.1.10  Bcast:192.168.1.255  Mask:255.255.255.0
>           inet6 addr: fe80::2a0:d1ff:fee5:e9ec/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:65 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:0 (0.0 b)  TX bytes:8742 (8.5 KiB)
>           Interrupt:58 Base address:0x8000

Do an:

# ethtool eth0

and show us the output.

Michael.