I have sme 5.6 Server, and this happen when i make the last upgrade
5 packets transmitted, 0 received, 100% loss, time 4010ms
[root@zeus root]# ping 
www.e-smith.orgPING 
www.e-smith.org (216.191.234.125) from 200.173.108.29 : 56(84) bytes of data.
--- 
www.e-smith.org ping statistics ---
7 packets transmitted, 0 received, 100% loss, time 6014ms
[root@zeus root]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:E0:7D:A0:62:15
          inet addr:10.10.50.1  Bcast:10.10.50.255  Mask:255.255.255.0
          EtherTalk Phase 2 addr:65280/216
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:20040393 errors:2 dropped:0 overruns:0 frame:0
          TX packets:20199634 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0
          RX bytes:1351074239 (1288.4 Mb)  TX bytes:2538001426 (2420.4 Mb)
eth1      Link encap:Ethernet  HWaddr 00:E0:7D:A0:57:A6
          inet addr: MY_ADDRESS  Bcast: MY_BCAST  Mask:255.255.255.240
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:21445071 errors:20 dropped:1 overruns:20 frame:0
          TX packets:22086237 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0
          RX bytes:2625742249 (2504.1 Mb)  TX bytes:1648678764 (1572.3 Mb)
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          EtherTalk Phase 2 addr:0/0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:168198 errors:0 dropped:0 overruns:0 frame:0
          TX packets:168198 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0
          RX bytes:20547090 (19.5 Mb)  TX bytes:20547090 (19.5 Mb)