Messages in this thread | | | From | Denis Vlasenko <> | Subject | Re: BUG: 2 NICs on same network | Date | Tue, 23 Apr 2002 14:05:02 -0200 |
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On 23 April 2002 07:39, Frank Louwers wrote: > Hi, > > We recently stummed across a rather annoying bug when 2 nics are on > the same network. > > Our situation is this: we have a server with 2 nics, each with a > different IP on the same network, connected to the same switch. Let's > assume eth0 has ip 1.2.3.1 and eth1 has 1.2.3.2, with a both with a > netmask of 255.255.255.0. > > Now the strange thing is that traffic for 1.2.3.2 arrives at eth0 no > matter what! > > Even if we disconnect the cable for eth1, 1.2.3.2 still replies to > pings, ssh, web, ... > > We tested this on IA32 architecture, different 2.4.x kernels and > different nics ... > > Is this a bug or a known issue? If it is not a bug, how can it be > solved?
Do you have ip forwarding enabled? If yes, kernel just forwards packets: network -> eth0 -> kernel
Try traceroute to eth1' ip. Examine arp tables. What MAC is listed there for eth1 IP? -- vda - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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