help -networking

[JARA MELAGRANI, Mariano [wz]]

On 20/01/2014 09:00 a.m., ubuntu-users-request at lists.ubuntu.com wrote:>> Am 19.01.2014 um 21:37 schrieb william drescher
>> > <william at TechServSys.com <mailto:william at TechServSys.com>>:
>> >
>>> >> The server I use for development blew its motherboard.  I
>>> >> switched the (only) hard disk to another system and it boots
>>> >> fine.  But, when I try to ping to or from the new system it
>>> >> reports "Destination unreachable"
>>> >>
>>> >> /etc/network/interfaces has one eth entry for eth2.
>>> >> It is the same as it was before the motherboard switch.
>>> >>
>>> >> I sure could use some help in getting this system back on line.
>>> >>
>>> >> bill
>>> >>
>>> >>On 1/19/2014 3:42 PM, Kevin Olbrich wrote:> Is it the same network card?
>> >
>> > Otherwise ubuntu creates new interfaces for each mac.
>> >
<snip>
> No the original system had a NIC on the motherboard, this has a 
> separate card.
> 
> how do I find out what interface I have ?

Is there a firewall or ACL (access control list) set on your router or switch that is filtering based on MAC addresses? If there is, you need to first add the new system´s MAC address to the allowed interface list.

Mariano