This is all on the OpenVPN Server....

root@virt-01:/home/carter# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:02:B3:28:AB:F6  
          inet addr:192.168.1.36  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::202:b3ff:fe28:abf6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:574219 errors:0 dropped:0 overruns:0 frame:0
          TX packets:266906 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:654221265 (623.9 MiB)  TX bytes:118726394 (113.2 MiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:41561 errors:0 dropped:0 overruns:0 frame:0
          TX packets:41561 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:360951144 (344.2 MiB)  TX bytes:360951144 (344.2 MiB)

tun0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:192.168.8.1  P-t-P:192.168.8.2  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:18 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:1407 (1.3 KiB)  TX bytes:84 (84.0 b)

root@virt-01:/home/carter# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.8.2     0.0.0.0         255.255.255.255 UH    0      0        0 tun0
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.8.0     192.168.8.2     255.255.255.0   UG    0      0        0 tun0
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
root@virt-01:/home/carter# 

root@virt-01:/home/carter# ping -I 192.168.8.1 192.168.1.1
PING 192.168.1.1 (192.168.1.1) from 192.168.8.1 : 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=255 time=3.62 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=255 time=1.70 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=255 time=1.70 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=255 time=2.11 ms

root@virt-01:/home/carter# ping -I 192.168.1.36 192.168.1.1
PING 192.168.1.1 (192.168.1.1) from 192.168.1.36 : 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=255 time=0.820 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=255 time=0.674 ms