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+--- Thread: trouble with NAT and PAT (/thread-29.html)
trouble with NAT and PAT - ny167 - 04-23-2008
Hi am am trying to do the ccna skills 4 test, which includes:
frame relay
ppp
eigrp
dhcp
nat
pat
configure static routes.
Everything works fine until I get to NAT and PAT.
Here is the outline:
3 routers = ISP, Sydney, Auckland
ISP>Sydney = Frame relay
Sydney> Auckland = ppp with chap
regarding NAT the tasks are:
NAT to translate the 10.0 addresses to a 192.168.100.0/24. Use PAT to ensure that only the addresses 192.168.100.11 to .20 are translated to.
Use a static mapping of 10.10.0.1 to 192.168.0.1
my nat configs on ISP are
Interface e 0 = 10.10.0.1/16
ip nat inside
int s 0/0 = 192.168.2.1 /30
ip nat outside
access-list 1 permit 10.10.0.0 0.0.255.255
ip nat pool NAT 192.168.100.11 192.168.100.20 netmask 255.255.255.0
ip nat inside source static 10.10.0.1 192.168.100.1
ip nat inside source list 1 pool NAT overload
Sydney has a default route pointing back to ISP, which has also been redistributed to Auckkland.
Any ideas why the NAT dont work.
I cant see why
Thanks
Re: trouble with NAT and PAT - directly_connected - 04-30-2008
I can't really remember, but I don't think you can use PAT with a pool of addresses. Take the "overload" keyword off and see what happens.
Everything else is correct.
Tim
Re: trouble with NAT and PAT - directly_connected - 04-30-2008
Nevermind---your problem is that the IP address on s0/0 on ISP needs to be in the same subnet as the NAT pool.
Tim
Re: trouble with NAT and PAT - fraggle0701 - 07-05-2009
There is something not quite right about this scenario.
the original text states that isp interface serial 0/0 has an ip address of 192.168.1.5/30
but the nat'd address comes from a pool from 192.168.100.0 network, has cisco made a mistake as I can't get this to work either.
I have had difficulty with this practical for ages both in realtime on cisco kit and in packet tracer 5.1
even the frame-relay doesn't seem to work despite having all configs on router.
has anyone got a full set of configs so that I can compare them with my ones..