sri
2012-Apr-11 10:35 UTC
[CentOS] URGENT -- pseudo network interface creating problem with dhcp-- centos 5.5
Group, My linux box, running with Centos-5.5, is showing up (??) a pseudo network interface for Eth0. On Switch where my Eth0 is connected, observed 2 MAC-Addresses. If a DHCP server present in LAN, the second pseudo interface is picking up a DHCP IP Address too. Furthermore you can ping both Eth0 ip and Psedo Eth0 IP from the switch. The intensity of the problem is more when port-security is configured on SW for that port. ?ifconfig ?a? is not showing that pseudo interface.>From dmesg output, no new things observed related while detecting theeth0 NIC during bootup. Only proof for this pseudo inerface?s mac address is SW showing it (on the SW port connected to my box eth0) in ?show mac address-table? output Is there anything that I have to check to nail down the issue. Any pointers are highly appreciated. -- -- ?Krishna Mohan B
Mihamina Rakotomandimby
2012-Apr-11 10:40 UTC
[CentOS] URGENT -- pseudo network interface creating problem with dhcp-- centos 5.5
On 04/11/2012 01:35 PM, sri wrote:> Is there anything that I have to check to nail down the issue. > Any pointers are highly appreciated.I did not understand your issue: - Do you want to get rid of the peudo interface? - Do you want the pseudo interface not to get a DHCP answer? - Do you want the switch not to see your pseudo interface? - Do you want to locate exactly where is the pseudo interface? -- RMA.
Markus Falb
2012-Apr-11 12:28 UTC
[CentOS] URGENT -- pseudo network interface creating problem with dhcp-- centos 5.5
On 11.4.2012 12:35, sri wrote: ...> My linux box, running with Centos-5.5, is showing up (??) a pseudo > network interface for Eth0. > On Switch where my Eth0 is connected, observed 2 MAC-Addresses. > If a DHCP server present in LAN, the second pseudo interface is > picking up a DHCP IP Address too. > Furthermore you can ping both Eth0 ip and Psedo Eth0 IP from the switch. > The intensity of the problem is more when port-security is configured > on SW for that port. > > ?ifconfig ?a? is not showing that pseudo interface.Show us the output of ifconfig -a -- Kind Regards, Markus Falb -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 307 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20120411/733c4c85/attachment-0003.sig>
Markus Falb
2012-Apr-11 12:43 UTC
[CentOS] URGENT -- pseudo network interface creating problem with dhcp-- centos 5.5
On 11.4.2012 12:35, sri wrote:> Group, > > My linux box, running with Centos-5.5, is showing up (??) a pseudo > network interface for Eth0. > On Switch where my Eth0 is connected, observed 2 MAC-Addresses. > If a DHCP server present in LAN, the second pseudo interface is > picking up a DHCP IP Address too. > Furthermore you can ping both Eth0 ip and Psedo Eth0 IP from the switch. > The intensity of the problem is more when port-security is configured > on SW for that port. > > ?ifconfig ?a? is not showing that pseudo interface. > From dmesg output, no new things observed related while detecting the > eth0 NIC during bootup. > Only proof for this pseudo inerface?s mac address is SW showing it (on > the SW port connected to my box eth0) in ?show mac address-table? > output > > Is there anything that I have to check to nail down the issue. > > Any pointers are highly appreciated.A running virtual machine which virtual interface is bridged to eth0 ? -- Kind Regards, Markus Falb -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 307 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20120411/8602949f/attachment-0003.sig>
yonatan pingle
2012-Apr-11 13:21 UTC
[CentOS] URGENT -- pseudo network interface creating problem with dhcp-- centos 5.5
Have you checked if your motherboard IPMI is not pulling an address during boot? On Wed, Apr 11, 2012 at 3:28 PM, Markus Falb <markus.falb at fasel.at> wrote:> On 11.4.2012 12:35, sri wrote: > ... >> My linux box, running with Centos-5.5, is showing up (??) a pseudo >> network interface for Eth0. >> On Switch where my Eth0 is connected, observed 2 MAC-Addresses. >> If a DHCP server present in LAN, the second pseudo interface is >> picking up a DHCP IP Address too. >> Furthermore you can ping both Eth0 ip and Psedo Eth0 IP from the switch. >> The intensity of the problem is more when port-security is configured >> on SW for that port. >> >> ?ifconfig ?a? is not showing that pseudo interface. > > Show us the output of ifconfig -a > -- > Kind Regards, Markus Falb > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >-- Best Regards, Yonatan Pingle RHCT | RHCSA | CCNA1
sri
2012-Apr-11 16:36 UTC
[CentOS] URGENT -- pseudo network interface creating problem with dhcp-- centos 5.5
Thanks for the responses.
Please see my answers to your questions:
1) What I want is to locate exactly where the psuedo IF and get rid of
it. Is there a way to prohibit the pseduo IF not to get DHCP answer?
2) Output of Ifconfig -a:
##########################################
eth0 Link encap:Ethernet HWaddr E4:1F:13:77:16:5F
inet addr:10.1.10.10 Bcast:10.1.10.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7818 errors:0 dropped:0 overruns:0 frame:0
TX packets:7762 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:841003 (821.2 KiB) TX bytes:1095188 (1.0 MiB)
Interrupt:169 Memory:e8100000-e8110000
eth1 Link encap:Ethernet HWaddr E4:1F:13:77:16:60
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:50 Memory:e8200000-e8210000
eth2 Link encap:Ethernet HWaddr 00:15:17:EB:AE:A4
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)
Memory:e8020000-e8040000
eth3 Link encap:Ethernet HWaddr 00:15:17:EB:AE:A5
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)
Memory:e8060000-e8080000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:11040 errors:0 dropped:0 overruns:0 frame:0
TX packets:11040 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2731896 (2.6 MiB) TX bytes:2731896 (2.6 MiB)
###########################################
Output on Switch:
######################################################
SW#sh arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.1.10.1 - 0022.0c4d.c141 ARPA Vlan10
Internet 10.1.10.3 5 e41f.1377.1661 ARPA
Vlan10>>>>Psuedo Interface off Eth0
Internet 10.1.10.10 5 e41f.1377.165f ARPA Vlan10
SW#sh ip dhcp binding
IP address Client-ID/ Lease expiration Type
Hardware address
10.1.10.3 e41f.1377.1661 Mar 06 1993 10:22 AM
Automatic >>>>Psuedo Interface acquiring DHCP IP Address
10.1.30.57 0100.2713.6521.9c Mar 06 1993 10:03 AM Automatic
SW#ping 10.1.10.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.10.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 33/37/51 ms
SW#ping 10.1.10.10
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.10.10, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/9 ms
######################################################
3) No Virtual machine is running on this box.
4) Have you checked if your motherboard IPMI is not pulling an address
during boot?
-- Frankly, not sure how to check motherboard IPMI messages. Verified
dmesg output. Following is the dmesg output.
Please share any way to check motherboard IPMI is pulling another address?
dmesg output: (showing only eth0/eth1/eth2 output)
#########################################################################
EDAC MC: Ver: 2.0.1 Apr 2 2010
EDAC MC0: Giving out device to i3200_edac i3200: DEV 0000:00:00.0
e1000e: Intel(R) PRO/1000 Network Driver - 1.0.2-k3
e1000e: Copyright (c) 1999-2008 Intel Corporation.
ACPI: PCI Interrupt 0000:04:00.0[A] -> GSI 16 (level, low) -> IRQ 169
PCI: Setting latency timer of device 0000:04:00.0 to 64
eth0: (PCI Express:2.5GB/s:Width x4) 00:15:17:eb:ae:a4
eth0: Intel(R) PRO/1000 Network Connection
eth0: MAC: 0, PHY: 4, PBA No: d56146-003
ACPI: PCI Interrupt 0000:04:00.1[B] -> GSI 17 (level, low) -> IRQ 209
PCI: Setting latency timer of device 0000:04:00.1 to 64
sd 0:0:0:0: Attached scsi generic sg0 type 0
sd 1:0:0:0: Attached scsi generic sg1 type 0
scsi 2:0:0:0: Attached scsi generic sg2 type 5
eth1: (PCI Express:2.5GB/s:Width x4) 00:15:17:eb:ae:a5
eth1: Intel(R) PRO/1000 Network Connection
eth1: MAC: 0, PHY: 4, PBA No: d56146-003
tg3.c:v3.106 (January 12, 2010)
PCI: Enabling device 0000:00:1f.3 (0141 -> 0143)
ACPI: PCI Interrupt 0000:00:1f.3[B] -> GSI 17 (level, low) -> IRQ 209
ACPI: PCI Interrupt 0000:02:00.0[A] -> GSI 16 (level, low) -> IRQ 169
PCI: Setting latency timer of device 0000:02:00.0 to 64
eth2: Tigon3 [partno(BCM95722) rev a200 PHY(5722/5756)] (PCI Express)
10/100/1000Base-T Ethernet e4:1f:13:77:16:5f
eth2: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] WireSpeed[1] TSOcap[1]
eth2: dma_rwctrl[76180000] dma_mask[64-bit]
ACPI: PCI Interrupt 0000:03:01.0[A] -> GSI 21 (level, low) -> IRQ 50
eth1: Tigon3 [partno(BCM95703A30) rev 1100 PHY(5703)]
(PCI:33MHz:32-bit) 10/100/1000Base-T Ethernet e4:1f:13:77:16:60
eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] WireSpeed[1] TSOcap[1]
eth1: dma_rwctrl[763f0000] dma_mask[64-bit]
sr0: scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray
Uniform CD-ROM driver Revision: 3.20
#########################################################################
Regards, Sri
On Wed, Apr 11, 2012 at 4:05 PM, sri <bskmohan at gmail.com>
wrote:> Group,
>
> My linux box, running with Centos-5.5, is showing up (??) a pseudo
> network interface for Eth0.
> On Switch where my Eth0 is connected, observed 2 MAC-Addresses.
> If a DHCP server present in LAN, the second pseudo interface is
> picking up a DHCP IP Address too.
> Furthermore you can ping both Eth0 ip and Psedo Eth0 IP from the switch.
> The intensity of the problem is more when port-security is configured
> on SW for that port.
>
> ?ifconfig ?a? is not showing that pseudo interface.
> From dmesg output, no new things observed related while detecting the
> eth0 NIC during bootup.
> Only proof for this pseudo inerface?s mac address is SW showing it (on
> the SW port connected to my box eth0) in ?show mac address-table?
> output
>
> Is there anything that I have to check to nail down the issue.
>
> Any pointers are highly appreciated.
>
>
> --
> --
> ?Krishna Mohan B
--
--
?Krishna Mohan B