[TriLUG] problems with multiple interfaces on a RHEL5.5 x64 machine

[Warren Myers]

Good evening, all

I am trying to use a statically-assigned address on one interface (eth1) of
a server and have a dhcp-assigned address on another interface (eth2) on
the same subnet (172.17.11.0/24).

When I setup a static IP for eth1 (following the directions found on
http://www.cyberciti.biz/faq/rhel-centos-fedoracore-linux-network-card-configuration),
I entered the following into `/etc/sysconfig/network-scripts/ifcfg-eth1`:

# ServerEngines Corp. Emulex OneConnect 10Gb NIC (be3)
DEVICE=eth1
BOOTPROTO=static
DHCPCLASS=
HWADDR=00:21:5A:9B:00:41
IPADDR=172.17.11.203
NETMASK=255.255.255.0
#TYPE=ethernet
ONBOOT=yes


If eth1 is the only adapter running, I cannot ping *ANY* external IP :(

When eth2 is also running, I can ping external addresses.

`ifconfig` returns the following:

eth1      Link encap:Ethernet  HWaddr 00:21:5A:9B:00:41
          inet addr:172.17.11.203  Bcast:172.17.11.255  Mask:255.255.255.0
          inet6 addr: fe80::221:5aff:fe9b:41/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4747 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5495 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:447100 (436.6 KiB)  TX bytes:1059019 (1.0 MiB)
          Memory:fbf60000-fbf80000

eth2      Link encap:Ethernet  HWaddr 00:21:5A:9B:00:42
          inet addr:172.17.11.245  Bcast:172.17.11.255  Mask:255.255.255.0
          inet6 addr: fe80::221:5aff:fe9b:42/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6745 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10802 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1260318 (1.2 MiB)  TX bytes:12302950 (11.7 MiB)
          Memory:fbe40000-fbe60000


# cat /etc/sysconfig/network
HOSTNAME=<redacted>
NETWORKING=yes
NETWORKING_IPV6=no
GATEWAY=172.17.11.1


Am I missing something super obvious? If so, what is it?

Regards,
Warren

-- 
Warren Myers
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