Re: fun with nat

From: Kyle Galusha (kgalusha@xxxxxxxxx)
Date: Mon Sep 11 2000 - 22:02:56 GMT-3


   
   As far as I can tell NAT works fine with OSPF. The trick to get
   around the fact that ospf advertises loopbacks as host/32 networks (I
   assume that is the problem you have run into). To get around that
   problem either try setting "ip ospf network p-t-p"
   or put the ip address of over global nat pool on a tunnel interface
   and have the tunnel source and destination point to the same loopback
   address. Either technique should allow ospf to advertise a real sunet
   address and not just a /32 route. NAt works with other routing
   protocols as well.
   Kyle
   At 07:07 PM 9/11/2000 -0400, John Conzone wrote:
   
         I've been playing with nat in my test lab, and have found that
     it wreaks havoc with ospf. I haven't tried any of the DV protocols
     yet.
         Has anyone tried?
         My plan was to do DLSW through NAT but I can't apply NAT, at
     least with OSPF.
         How do you guys do DLSW through NAT? I mean, how do you "route"
     to the routers running NAT?
         Static's, RIP,etc.? How about tunnels. I know from real life
     that PPTP and L2TP won't run through PAT, which is actually what
     I'm doing. OSPF won't set up adj at all because the hellos are
     sourced form a network that is not local to the net. (the NAT
     address). I imaginef EIGRP will have the same problem.
         I guess what I am asking is where and how do you place NAT in
     your nets to test how various scenarios work?
         Thanks!



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