Re[3]: [gentoo-user] MAC addresses
Thursday, April 30, 2009, 10:48:06 PM, Sergey wrote: Thursday, April 30, 2009, 10:34:28 PM, Daniel wrote: On Thu, 2009-04-30 at 18:09 +0300, Sergey A. Kobzar wrote: Hello. I have Gentoo server Linux 2.6.27-gentoo-r8 x86_64 connected to LinkSys switch. It has 2 NICs onboard: eth0 Link encap:Ethernet HWaddr 00:15:17:1a:6e:6c eth1 Link encap:Ethernet HWaddr 00:15:17:1a:6e:6d 2nd NIC is connected to LinkSys switch, but the switch shows that device connected to the port has other MAC address: VLAN ID VLAN 3 MAC 00:15:17:1a:6e:6f Port g31 The difference in last symbol. How is it possible? I suggest, to first check which device/OS is telling the truth. Use wireshark to capture and review some traffic. Maybe this helps analyse the situation. I've started this thread because connection to the server is unstable and I see such reports from other servers: +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6f to 00:15:17:1a:6e:6d on em1 +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6d to 00:15:17:1a:6e:6f on em1 +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6f to 00:15:17:1a:6e:6d on em1 +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6d to 00:15:17:1a:6e:6f on em1 +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6f to 00:15:17:1a:6e:6d on em1 BIOS tells that NIC1 has 00:15:17:1a:6e:6c MAC and NIC2 has 00:15:17:1a:6e:6d. It's strange that 00:15:17:1a:6e:6d MAC is common for both NICs. I think this happens because Intel NIC Teaming is enabled for the NIC. Is it possible check this using Linux and disable teaming if needed? -- Sergey
[gentoo-user] MAC addresses
Hello. I have Gentoo server Linux 2.6.27-gentoo-r8 x86_64 connected to LinkSys switch. It has 2 NICs onboard: eth0 Link encap:Ethernet HWaddr 00:15:17:1a:6e:6c eth1 Link encap:Ethernet HWaddr 00:15:17:1a:6e:6d 2nd NIC is connected to LinkSys switch, but the switch shows that device connected to the port has other MAC address: VLAN ID VLAN 3 MAC 00:15:17:1a:6e:6f Port g31 The difference in last symbol. How is it possible? -- Sergey
Re: [gentoo-user] MAC addresses
On Thu, 2009-04-30 at 18:09 +0300, Sergey A. Kobzar wrote: Hello. I have Gentoo server Linux 2.6.27-gentoo-r8 x86_64 connected to LinkSys switch. It has 2 NICs onboard: eth0 Link encap:Ethernet HWaddr 00:15:17:1a:6e:6c eth1 Link encap:Ethernet HWaddr 00:15:17:1a:6e:6d 2nd NIC is connected to LinkSys switch, but the switch shows that device connected to the port has other MAC address: VLAN ID VLAN 3 MAC 00:15:17:1a:6e:6f Port g31 The difference in last symbol. How is it possible? I suggest, to first check which device/OS is telling the truth. Use wireshark to capture and review some traffic. Maybe this helps analyse the situation. Bye, Daniel -- PGP key @ http://pgpkeys.pca.dfn.de/pks/lookup?search=0xBB9D4887op=get # gpg --recv-keys --keyserver hkp://subkeys.pgp.net 0xBB9D4887 signature.asc Description: This is a digitally signed message part
Re[2]: [gentoo-user] MAC addresses
Thursday, April 30, 2009, 10:34:28 PM, Daniel wrote: On Thu, 2009-04-30 at 18:09 +0300, Sergey A. Kobzar wrote: Hello. I have Gentoo server Linux 2.6.27-gentoo-r8 x86_64 connected to LinkSys switch. It has 2 NICs onboard: eth0 Link encap:Ethernet HWaddr 00:15:17:1a:6e:6c eth1 Link encap:Ethernet HWaddr 00:15:17:1a:6e:6d 2nd NIC is connected to LinkSys switch, but the switch shows that device connected to the port has other MAC address: VLAN ID VLAN 3 MAC 00:15:17:1a:6e:6f Port g31 The difference in last symbol. How is it possible? I suggest, to first check which device/OS is telling the truth. Use wireshark to capture and review some traffic. Maybe this helps analyse the situation. I've started this thread because connection to the server is unstable and I see such reports from other servers: +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6f to 00:15:17:1a:6e:6d on em1 +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6d to 00:15:17:1a:6e:6f on em1 +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6f to 00:15:17:1a:6e:6d on em1 +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6d to 00:15:17:1a:6e:6f on em1 +arp: 10.11.1.203 moved from 00:15:17:1a:6e:6f to 00:15:17:1a:6e:6d on em1 BIOS tells that NIC1 has 00:15:17:1a:6e:6c MAC and NIC2 has 00:15:17:1a:6e:6d. It's strange that 00:15:17:1a:6e:6d MAC is common for both NICs. Bye, Daniel -- Sergey
