Centos 5.5 Two Nic's Only One works at a time
First let me say thanx to this forum I have learned to use linux very well lately do to the posts and answers here.
So now I have run into a problem I can't figure out what's going on.
Dell Power Edge Server SC440
1GB ECC RAM
Aprox 400 GB in a Raid setup
One On Boad Gigabit Nic Card (will be referred to as eth0 Network 66.x.x.x Netmask 255.255.255.224 Gateway 66.x.x.98)
One PCI 3 Com TX 100MBPS NIC Card (will be referred to as eth1 Network 74.x.x.x Netmask 255.255.255.224 Gateway 74.x.x.98)
I boot machine up and on load Linux show eth0 & eth1 as starting up normal.
Now i go to ping one of the IP's on eth0 and they return a nice connection.
Now I go to ping one of the IP's on eth1 and I do not get a response.
So I run the command ifup eth1
Once this command finishes running I ping an IP on eth1 and I get a nice quick response.
Now I go to ping an IP on eth0 and eth0 gets no response now.
If I run command ifup eth0
The command finishes running and eth0 and all it's IP's are pingable again but eth1 becomes unresponsive once more.
NETSTAT -rnv READOUT:
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
66.x.x.96 0.0.0.0 255.255.255.224 U 0 0 0 eth1
74.x.x.96 0.0.0.0 255.255.255.224 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
0.0.0.0 126.96.36.199 0.0.0.0 UG 0 0 0 eth1
It appears like, the default route of one interface is getting disabled, if you try to enable the other interface. You will need to have multiple routes to solve this problem.
I look at these explanations and they kind of confuse me.
what is the:
I would be adding to the rt_tables file and am i supposed to add these specific commands to the file to or run these commands at the prompt and they will add themselves.
ip route add 10.2.0.0 dev eth0 src 10.2.0.100 table eth0
ip route add 10.1.0.0 dev eth1 src 10.1.0.10 table eth1
I just need a little more explanation to get the just of what i'm actually doing i don't want to mess this machine up the software built into it is worth 20 g's
Any help on this would be appreciated by anyone. I can't figure out why the second the route drops everytime.
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