I have 4 servers running Centos 5. All of them have two ethernet network cards.

I have configured 192.168.1.x IP addresses on their eth0 card. They are all connected to the same switch using their eth0 card and they are all working.

I have configured 10.72.11.x IP addresses on their eth1 card.They are all connected to the same switch - a different one from the switch used with eth0 card - using their eth1 card and they are NOT all working.

Their configuration files is like:

DEVICE=eth1
BOOTPROTO=static
IPADDR=10.72.11.236
BROADCAST=10.72.11.191
NETMASK=255.255.255.192
NETWORK=10.72.11.128
HWADDR=84:2B:2B:55:4B:98
IPV6INIT=yes
IPV6_AUTOCONF=yes
ONBOOT=yes


The interfase is starting and configured as I need. [root@sql1 network-scripts]# ifconfig
eth0 Link encap:Ethernet HWaddr 84:2B:2B:55:4B:97
inet addr:192.168.1.105 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::862b:2bff:fe55:4b97/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2981 errors:0 dropped:0 overruns:0 frame:0
TX packets:319 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:386809 (377.7 KiB) TX bytes:66134 (64.5 KiB)
Interrupt:36 Memory:da000000-da012800
eth1 Link encap:Ethernet HWaddr 84:2B:2B:55:4B:98
inet addr:10.72.11.236 Bcast:10.72.11.191 Mask:255.255.255.192
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:48 Memory:dc000000-dc012800


I also added a route-eth1 file that looks like:
10.0.0.0/8 via 10.72.11.254

Routing looks fine to me:

[root@sql1 network-scripts]# netstat -rn  
Kernel IP routing table  
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface  
10.72.11.192    0.0.0.0         255.255.255.192 U         0 0          0 eth1  
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0  
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth1  
10.0.0.0        10.72.11.254    255.0.0.0       UG        0 0          0 eth1  
0.0.0.0         192.168.1.1     0.0.0.0         UG        0 0          0 eth0  

But I cannot ping one server from the other.

[root@sql1 network-scripts]# ping 10.72.11.235
PING 10.72.11.235 (10.72.11.235) 56(84) bytes of data.
From 10.72.11.236 icmp_seq=1 Destination Host Unreachable
From 10.72.11.236 icmp_seq=2 Destination Host Unreachable
From 10.72.11.236 icmp_seq=3 Destination Host Unreachable
From 10.72.11.236 icmp_seq=4 Destination Host Unreachable
From 10.72.11.236 icmp_seq=5 Destination Host Unreachable
From 10.72.11.236 icmp_seq=6 Destination Host Unreachable
^C
--- 10.72.11.235 ping statistics ---
7 packets transmitted, 0 received, +6 errors, 100% packet loss, time 6033ms , pipe 3


What am I doing wrong?