Another NAT problem

From: Hunt Lee (ciscoforme3@yahoo.com.au)
Date: Sat Nov 02 2002 - 08:25:43 GMT-3


Group,

I have run into another NAT problem. This time, what I'm trying to achieve is
that I have 3 servers with mirrored content, & I want to create a "virtual
server" with an IP of 100.20.1.1

ServerA (192.168.1.2/24)
                        \
ServerB (192.168.1.3/24)- RTA ---- RTB (207.35.14.81 /30)
                        /
ServerC (192.168.1.4/24)

But when I tried to ping the Virtual IP from RTB, no NAT translation is taking
place, and hence the ping is unsucessful.

here's RTA config...

interface FastEthernet0/0
 description Inside NAT - to the 3 servers
 ip address 192.168.1.1 255.255.255.0
 ip nat inside
 no ip route-cache
 no ip mroute-cache
 duplex auto
 speed auto
!
interface Serial0/0
 description to Outside - to RTB
 ip address 207.35.14.82 255.255.255.252
 ip nat outside
 no ip route-cache
 no ip mroute-cache
 clockrate 64000

ip nat pool PoolOne 192.168.1.2 192.168.1.4 prefix-length 24 type rotary
ip nat inside destination list 5 pool PoolOne

access-list 5 permit 100.20.1.1

****** I can ping fine to the Internal local IPs of the 3 servers *****

RTB#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/33/36 ms
RTB#ping 192.168.1.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/34/36 ms
RTB#

**** but when I try to ping the Virtual IP, nothing happens ****

RTB#ping 100.20.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 100.20.1.1, timeout is 2 seconds:
U.U.U
Success rate is 0 percent (0/5)
RTB#

RTA#sh ip nat translations

RTA#

Any help will be greatly appreciated.

Regards,
H.

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This archive was generated by hypermail 2.1.4 : Tue Dec 03 2002 - 07:22:51 GMT-3