Michael C. Toren on 7 Nov 2003 11:55:04 -0500


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Re: [PLUG] NIC driver installation howto? (newbieish level help needed)


On Wed, Nov 05, 2003 at 06:33:50PM -0500, kaze wrote:
> I pulled the 3COM NIC and put the LNE-100TX in, RH detected the new hardware
> [root@sa root]# ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:A0:FF:FF:9E:B6
>           inet addr:10.10.10.50  Bcast:10.10.10.255  Mask:255.255.255.0

An internal network of 10.10.10/24; okay.

> [root@sa root]# ping 10.10.10.50
> PING 10.10.10.50 (10.10.10.50) 56(84) bytes of data.
> 64 bytes from 10.10.10.50: icmp_seq=1 ttl=64 time=0.066 ms

And you're able to ping yourself, which is good -- just remember that
pinging yourself actually uses the loopback interface, not the network
interface, and has nothing to do with your network driver.

> [root@sa root]# ping 10.10.10.211
> PING 10.10.10.211 (10.10.10.211) 56(84) bytes of data.
> From 10.10.10.50 icmp_seq=1 Destination Host Unreachable

When attempting to ping a locally connected IP address and an ICMP host
unreachable message such as this one is generated, with a source address
of your local address, it generally indicates that you aren't able to arp
for the destination address.  What does "arp -an" say for the 10.10.10.50
address -- "incomplete", or does it return a valid MAC address?

On Wed, Nov 05, 2003 at 06:43:30PM -0500, Paul wrote:
> That IP address looks a little strange, doesn't it?

Nope, it's perfectly valid.  Both 10.10.10.50 and 10.10.10.211 are in the
same subnet 10.10.10/24.  The 10.10.10.211 address should be reachable
from 10.10.10.50 even with no default route.

-mct
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