From: John Conzone (jkconzone@xxxxxxxx)
Date: Tue Sep 12 2000 - 19:02:19 GMT-3
Kyle, what happens is that when I debug ospf, it won't form a
neighbor relation shipp becasue the hello's are being source by a
network that is not on the cable./
For instance, whne I put NAT on an serial frame itnerface, and NAT
the 10 network to a 64 network, the hellos come out from 64.64.64.1,
and the oruter ont he other end, which is a 10 network, rejects the
hellos because the come from an unknown network.
----- Original Message -----
From: Kyle Galusha
To: John Conzone ; ccielab
Sent: Monday, September 11, 2000 9:02 PM
Subject: Re: fun with nat
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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