This is working machine on SuSE 9
omares-perseus1:/etc/sysconfig/network # ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0E:7F:B4:77:09
          inet addr:10.0.37.144  Bcast:10.0.37.255  Mask:255.255.255.0
          inet6 addr: fe80::20e:7fff:feb4:7709/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1678645803 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1641536741 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2450057514 (2336.5 Mb)  TX bytes:610434717 (582.1 Mb)
          Interrupt:7

eth0:1    Link encap:Ethernet  HWaddr 00:0E:7F:B4:77:09
          inet addr:10.0.37.145  Bcast:10.0.37.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:7

This is the machine I'm trying to set up:

eth0      Link encap:Ethernet  HWaddr 00:1D:09:F1:33:3A
          inet addr:10.0.37.152  Bcast:10.0.37.255  Mask:255.255.255.0
          inet6 addr: fe80::21d:9ff:fef1:333a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:700 errors:0 dropped:0 overruns:0 frame:0
          TX packets:142 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:146810 (143.3 Kb)  TX bytes:19861 (19.3 Kb)
          Interrupt:169

eth1      Link encap:Ethernet  HWaddr 00:1D:09:F1:33:3B
          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:58

I'm trying to add 10.0.37.153 as a second address.   I've edited the /etc/sysconfig/network/ifcfg file directly. It now looks like this. 

omares-perseus6:/etc/init.d # more /etc/sysconfig/network/ifcfg-eth-id-00\:1d\:09\:f1\:33\:3a
BOOTPROTO='static'
BROADCAST='10.0.37.255'
ETHTOOL_OPTIONS=''
IPADDR='10.0.37.152'
MTU=''
NAME='Dell NetXtreme BCM5721 Gigabit Ethernet PCI Express'
IPADDR='10.0.37.152'
NETMASK='255.255.255.0'
NETWORK='10.0.37.0'
REMOTE_IPADDR=''
STARTMODE='auto'
UNIQUE='rBUF.L_qlwWfIBZA'
USERCONTROL='no'
_nm_name='bus-pci-0000:03:00.0'
PREFIXLEN=''
BROADCAST_1='10.0.37.255'
IPADDR_1='10.0.37.153'
NETMASK_1='255.255.255.0'
NETWORK_1='10.0.37.0'
LABEL_=''

and strangely enough I can ping the new address but it won't show up in ifconfig.  How can I fix this?