Date: Wed, 18 Aug 2010 03:33:21 -0400 (EDT) From: Charles Sprickman <spork@bway.net> To: freebsd-net@freebsd.org Subject: Re: 8.1 em alias changes MAC Message-ID: <alpine.OSX.2.00.1008180330180.90200@hotlap.local> In-Reply-To: <alpine.OSX.2.00.1008160444330.90200@hotlap.local> References: <alpine.OSX.2.00.1008160444330.90200@hotlap.local>
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Following up on my own post... Well, that was dumb. I had IPMI enabled, and it had the same IP I was trying to use for the alias. Had no idea it somehow created it's own MAC though, that's odd. Sorry for the noise. Charles On Mon, 16 Aug 2010, Charles Sprickman wrote: > Hello, > > I've run into an odd problem on an 8.1 amd64 box (still running GENERIC) with > aliases on the em interface. > > Config is very simple: > > em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM> > ether 00:14:22:b1:54:18 > inet 10.3.2.233 netmask 0xffffff00 broadcast 10.3.2.255 > inet 10.3.2.234 netmask 0xffffffff broadcast 10.3.2.234 > media: Ethernet autoselect (100baseTX <full-duplex>) > status: active > > One main IP and one alias. > > The main IP is not giving me any issues, but the alias seems to fall off the > network after about 20 minutes or so. Connectivity just drops. I'd > initially thought something else had that IP, but that's not the case. > > Here's what another box sees before the problem starts: > > ? (10.3.2.233) at 00:14:22:b1:54:18 on sis0 [ethernet] > ? (10.3.2.234) at 00:14:22:b1:54:18 on sis0 [ethernet] > > And then after: > > ? (10.3.2.233) at 00:14:22:b1:54:18 on sis0 [ethernet] > ? (10.3.2.234) at 00:14:22:b1:54:1a on sis0 [ethernet] > > Note that the MAC for alias has changed... I'm seeing no "xx.xx.xx is using > my IP" and I also know I've only got one other box with an em interface in > the entire place and it's MAC is 00:30:48:28:87:16. > > All the other hosts log this: > > Aug 16 03:02:50 media kernel: arp: 10.3.2.234 moved from 00:14:22:b1:54:18 to > 00:14:22:b1:54:1a on em0 > > Deleting and re-adding the alias works for a bit, then this happens again. > > Any ideas? > > pciconf and dmesg snippet below. > > Thanks, > > Charles > > em0: <Intel(R) PRO/1000 Legacy Network Connection 1.0.1> port 0xecc0-0xecff > mem 0xfe9e0000-0xfe9fffff irq 32 at device 4.0 on pci2 > em0: [FILTER] > em0: Ethernet address: 00:14:22:b1:54:18 > > em0@pci0:2:4:0: class=0x020000 card=0x019a1028 chip=0x10768086 rev=0x05 > hdr=0x00 > vendor = 'Intel Corporation' > device = 'Gigabit Ethernet Controller (82541EI)' > class = network > subclass = ethernet > em1@pci0:4:3:0: class=0x020000 card=0x019a1028 chip=0x10768086 rev=0x05 > hdr=0x00 > vendor = 'Intel Corporation' > device = 'Gigabit Ethernet Controller (82541EI)' > class = network > subclass = ethernet >
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