so, I may have some better idea why this is happening. (apologies in advace
for my lack of expertise in this area. I just know what worked before and
now doesn't).
My 802.11b router is plugged into the cable modem. The ethernet router is
plugged into the 80211b router, and the sky2 is plugged into the ethernet
router. Since sky2 dies sometimes (I need to try a newer kernel) I keep the
802.11b connection around. Having such a setup lets me use both connections
with the same internet access.
What seems to be happening (that wasn't happening before) is that sometimes
sky2's dhcp request is going through the ethernet router and is being
answered by the 802.11b router (giving it a 192.168.0.* address). How the
ipw2200's request appears sometimes to be answered by the ethernet router is
still beyond me.
At any rate, after disconnecting the ethernet router from the 802.11b router,
running ifup -a now always correctly gives the same result (like it did
before):
eth0 Link encap:Ethernet HWaddr 00:16:E6:82:E4:E0
inet addr:10.0.9.4 Bcast:255.255.255.255 Mask:255.255.255.0
eth1 Link encap:Ethernet HWaddr 00:16:6F:B0:53:E9
inet addr:192.168.0.101 Bcast:192.168.0.255 Mask:255.255.255.0
Of course this means the ethernet router is no longer connected to the
internet, so I can't use its faster speed (when sky2 isn't broken).
I can probably get away with reconnecting it and configuring static addresses
for each interface and being done with dhcp, but I remain intensely curious
how this is happening in the first place. How is the 802.11b card (ipw2200)
getting a response from the ethernet router at all (DHCPACK from 10.0.9.1)?
Less impossible seeming but still very odd is how the ethernet router gets a
dhcp response from the 802.11b router instead of the ethernet router to which
it is directly connected. Are they actually getting these responses in the
first place, or is ifup/ifconfig only mistakenly displaying that they are?
Neither router has had a firmware update, the change must be in my box's
software. Though I can work around it, if you can shed any light on the
situation, it would make my brain feel better. Thanks.
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