Messages in this thread | | | Date | Thu, 25 Sep 2003 15:18:50 -0500 | From | Eli Carter <> | Subject | Re: dual ethernet ports problem. |
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Adarsh Daheriya wrote: > hi all, > > i have got a system which has 2 eth ports. i use one of them (eth0) to > "network boot" the system > using dhcp, tftp and then mount the nfs file system on it. > > this leaves the other port (eth1) unusable. i cannot ping to the other > system through it. > but when i ping any of the two eth ports from some other system i get > the reply back. > but to my amazement the mac entries of both the ports is that of eth0 in > arp table. (arp command) > > why and how eth0 is acting as a proxy (perhaps) for both the ports and > how can i disable it? > > could anybody please help me in this concern.
Both ports on the same subnet/switch/etc perchance?
Linux replies to an IP address out of any port it cares to.[1] I've seen this come up a number of times, but I can't seem to find references to it in google.... Ah, wait, try this: http://www.cs.helsinki.fi/linux/linux-kernel/2002-16/0676.html LWN writeup about this: http://lwn.net/Articles/45373/ (Google for 'linux-kernel ping route IP MAC wrong' w/o quotes.)
HTH,
Eli
[1] Over-simplification to the extreme, and probably wrong to boot. 8) --------------------. "If it ain't broke now, Eli Carter \ it will be soon." -- crypto-gram eli.carter(a)inet.com `-------------------------------------------------
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