SRG

SCSIraidGURU’s World

VRF with OSPF using NAT

I took my new favorite simulation and created VRF with NAT.  The two areas in the boxes Development and Research have 192.168.48.0 subnets that are identical.   I am using NAT so they don’t cross over to the other area.   On Development I am using Dynamic NAT with a NAT range of 192.168.96.3 to 31.  On Research I did Overload only using 192.168.49.3 for NAT. 

iosv1 has VRF configurations and the connection to the real world.

Below are the sh ip route vrf files.  Look at Research and Development.  You will see the same IP address but the interfaces are different. 

iosv2 has Overload NAT configured for Research.  I removed ip vrf forwarding from the interfaces and switched back to Router OS # on all the routers for NAT to work.   The two Sh IP NAT Translation files show that overload NAT is being used.  Same IP address for pings from 3 routers to TFTP. 

iosv13 uses dynamic NAT instead of Overload NAT.  192.168.96.3 to 192.168.96.31 has been set aside for it.  I removed ip vrf forwarding from the interfaces and switched back to Router OS # on all the routers for NAT to work.  Each of the three routers PING test has a different NAT IP address from the range.

HR: 3, 5, and 6

Engineering 9, 10, 11 and 12

Research 2, 4, 7 and 8

Accounting: 14, 18 and 19

Development 13, 15, 16, and 17