by We have 2 available Internet connections, for redundancy, but we're
having trouble getting the second feed to work.
We have two feeds coming in on one 10baseT cable into a hub, and from
the hub we are connecting to the two network cards.
Our ifconfig setup:
eth0 Link encap:Ethernet HWaddr 00:00:00:00:00:01
inet addr:1.2.3.226 Bcast:1.2.3.231 Mask:255.255.255.248
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1914722 errors:0 dropped:0 overruns:0 frame:0
TX packets:2100107 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
Interrupt:11 Base address:0xa800
eth2 Link encap:Ethernet HWaddr 00:00:00:00:00:02
inet addr:4.5.6.226 Bcast:4.5.6.231 Mask:255.255.255.248
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9570 errors:0 dropped:0 overruns:0 frame:0
TX packets:51 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
Interrupt:3 Base address:0xa000
Our routing table:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
4.5.6.224 0.0.0.0 255.255.255.248 U 0 0 0
eth2
1.2.3.224 0.0.0.0 255.255.255.248 U 0 0 0
eth0
0.0.0.0 1.2.3.225 0.0.0.0 UG 0 0 0
eth0
The default gateway route for the 4.5.6.224 network is SUPPOSED to be
.225, but when I try to add that route to the routing table after
removing the default to go through 1.2.3.225, I get this:
root /etc> route del -net 4.5.6.224 netmask 255.255.255.248
root /etc> route add -net 4.5.6.224 netmask 255.255.255.248 gw
4.5.6.225 eth2
SIOCADDRT: Network is unreachable
root /etc> _
So, I added the network back on the default gateway for the time
being:
root /etc> route add -net 12.146.197.224 netmask 255.255.255.248 eth2
I'm pretty low on the skill side of setting up redundant links like
this. Can someone provide any pointers on what I can try? I'm above
average in terms of other areas of Linux administration, just never
set up a second network feed like this.
RedHat 7.0, i386, 2.2.16-22
Any assistance or pointers would be greatly appreciated.
Ian Douglas