help -networking

[william drescher]

On 1/20/2014 8:27 AM, JARA MELAGRANI, Mariano [wz] wrote:
> 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
>
nope, but a good thought.

bill