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Hi, |
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On Mon, 2 Oct 2006 10:49:34 -0500 |
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"Boyd Stephen Smith Jr." <bss03@××××××××××.net> wrote: |
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> > > > > How should eth1 and eth2 be |
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> > > > > configured in /etc/conf.d/net ? |
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> > > > They should be configured as part of a bridge device (see the |
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> > > > bridging section of /etc/conf.d/net.example) and have the address |
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> > > > assigned (and DHCPD listing on) that bridge device. |
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> > > Except that this doesn't work on WLAN (MAC layer done by the WLAN |
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> > > adapter). |
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> |
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> eth1 and eth2 are both wired, no? How does 802.11a/b/g come into this? |
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Yeah, that's just me not reading carefully. But looking at the first |
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post by the OP, I thought that ath0 was meant to join eth1 and eth2. |
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See my other mail, I've just clarified this. |
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> > > But probably "proxy_arp" can help here. And subnet |
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> > > separation, of course. Just extending the netmask a bit and enabling |
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> > > proxy_arp would do the job. OTOH, it's also easy to configure the |
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> > > routes to the other subnets via DHCP. Just a matter of taste. In any |
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> > > case, it only works on IP layer. |
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> |
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> I must admit that I've never used proxy_arp, but all ARP traffic occurs at |
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> the ethernet layer, below the IP layer, so it doesn't make sense to me for |
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> an option/program so named to only work on IP traffic. ARP is also only |
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> used intra-subnet, so this entire section doesn't make much sense to me. |
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Well, for something like a bridge, it has to work inter-(physical-) |
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subnet. Of course ARP happens on top of the link layer, just as IP. But |
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ARP is a requirement for IP traffic. And by faking ARP answers for the |
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computer in the other subnet, a router can redirect IP traffic to |
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itself. It just claims all addresses in the other subnet. That's what |
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"proxy_arp" does. So when it in fact uses forwarding, it behaves |
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similar to a bridge w/ regard to that you don't need to configure all |
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the computers with a route to the other subnet. |
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> In *any* case, it's extremely unlikely that the OP is going to be carrying |
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> any significant amount of non-IP traffic. I feel that is an extraordinary |
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> enough condition to be mentioned. |
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Agreed. |
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-hwh |
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-- |
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