New install of Solaris 2.6 and ethernet doesn't appear to work

1. Installed New Ethernet Card. Now Software Bridge Doesn't Work.


I have a 3-PC 10/100 Mb/s Ethernet home network, with all machines runing
Mandrake Linux 9.1.  I have two NIC's in my main computer, PC 1.  One is
installed in PCI slot 2, the other is in PCI slot 4.  In linuxconf, I set
up their IP addresses and FQDN's (respectively) as:, (alias 'bedroom') and, (alias 'bedroom2').

PC's 2 and 3 were set up with IP addresses and FQDN's (respectively) of:, (alias 'lounge') and, (alias 'kitchen2').

Because PC's 2 and 3 were on different sub-nets, it was difficult to access
one from the other (and vice versa).  So, I set up bridging on PC 1 by
issuing the following commands:

brctl addbr br0
brctl addif br0 eth0
brctl addif br0 eth1
ifconfig eth0
ifconfig eth1
ifconfig br0

and changed PC 3 to  Everything
worked beautifully, so, I added the above brctl lines to the bottom of my
/etc/rc.d/rc.local file so that the bridge comes into play at the end of OS
loading.  Works fine.

The problem started when I installed a third NIC in PC 1, in PCI slot 3.
This Ethernet card is connected to a cable modem and, in linuxconf, I set
it (eth2) to get it's IP address by selecting 'DHCP'.  I re-booted and did
an ifconfig.  It showed everyting as expected, except that eth2 did not
show an IP address, but, underneath, there was something referred to as
'eth2:9', which had an IP address I recognised as belonging to a pool of
IP's that my ISP uses.  I could ping this dynamic address.  So, everyting
was okay.  However, I could no longer ping PC 3 (
was pingable and so was PC 2 (  What's up?

Sorry about being so verbose, but I thought I'd better give as much info. as

Gary Hayward.

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