[CentOS] network interface question
Paras pradhan
pradhanparas at gmail.com
Wed Oct 13 22:39:30 UTC 2010
I have eight nics as below
[ppradhan at cvprd1 ~]$ ./lshw -short -class network
WARNING: you should run this program as super-user.
H/W path Device Class Description
===========================================================
/0/100/4/0/0 eth4 network NetXtreme II BCM5708
Gigabit Ethernet
/0/100/5/0/0 eth1 network NetXtreme II BCM5708
Gigabit Ethernet
/0/100/9/0/0 eth6 network NetXtreme II BCM5708
Gigabit Ethernet
/0/100/a/0/0 eth7 network NetXtreme II BCM5708
Gigabit Ethernet
/0/100/c/0/2/0 __tmp1035166962 network 82575GB Gigabit
Network Connection
/0/100/c/0/2/0.1 eth5 network 82575GB Gigabit
Network Connection
/0/100/c/0/4/0 __tmp619132850 network 82575GB Gigabit
Network Connection
/0/100/c/0/4/0.1 __tmp1445504961 network 82575GB Gigabit
Network Connection
On that only eth4, eth6 and eth7 are configured ( or have ifcfg-eth4 ,
ifcfg-eth6 and ifcfg-eth7) . Wondering why there is eth1 and eth5 and
also _tmp*
Thanks!
Paras.
On Wed, Oct 13, 2010 at 5:33 PM, Jacob Bresciani <jacob at aers.ca> wrote:
> eth1 exists because the /dev device was found on boot (you have 2 or more
> network interfaces).
> eth12 does due to you not have 13+ nic's or did not map a network device to
> be eth12.
>
> On Wed, Oct 13, 2010 at 3:26 PM, Paras pradhan <pradhanparas at gmail.com>
> wrote:
>>
>> Hi,
>>
>> I don't have ifcfg-eth1 in my /etc/sysconfig/network-scripts. But when
>> I do ifconfig eth1 I can see output as below. If I do ifconfig eth12 ,
>> I don't see anything which i am assume is normal.
>>
>>
>> eth1 Link encap:Ethernet HWaddr 00:24:E8:44:DB:CC
>> BROADCAST MULTICAST MTU:1500 Metric:1
>> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>> collisions:0 txqueuelen:1000
>> RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
>> Interrupt:17 Memory:e8000000-e8012800
>>
>>
>> Don't know why and how this is happening.
>>
>> Thanks!
>> Paras.
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>
>
>
> --
> Jacob Bresciani
> Linux Systems Administrator
> Advanced Ecommerce Research Systems / Terapeak
> Cell: 250 418-5412
>
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