OK, I have the following:
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interface Ethernet0
description test inside
ip address 10.24.10.4 255.255.252.0
no ip directed-broadcast
ip nat inside
no ip route-cache
no ip mroute-cache
!
interface Ethernet1
description test outside
ip address 172.17.29.254 255.255.255.0
no ip directed-broadcast
ip nat outside
no ip route-cache
ip nat pool test 172.21.0.3 172.21.0.3 netmask 255.255.255.0
ip nat inside source list 1 pool test overload
ip nat inside source static 10.24.10.2 172.21.0.2
ip classless
!
access-list 1 permit 10.24.0.0 0.0.255.255
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And I get the following:
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test#ping 10.24.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.24.10.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/4/8 ms
iaxis-csc#ping 172.21.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.21.0.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/8 ms
test#
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With the kit as follows
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test#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-IS-L), Version 12.0(9), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Mon 24-Jan-00 21:46 by bettyl
Image text-base: 0x0303DF2C, data-base: 0x00001000
ROM: System Bootstrap, Version 5.2(5), RELEASE SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(5), RELEASE SOFTWA
RE (fc1)
test uptime is 44 weeks, 4 days, 12 hours, 29 minutes
System restarted by reload
System image file is "flash:c2500-is-l.120-9.bin"
cisco 2500 (68030) processor (revision D) with 4096K/2048K bytes of memory.
Processor board ID 02003572, with hardware revision 00000000
Bridging software.
X.25 software, Version 3.0.0.
2 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read ONLY)
Configuration register is 0x2102
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As you can see the only difference between what I have and your config is the overloaded
nat pool which shouldn't make a difference.
If you do a sh ip route for 192.0.2.3 what does the routing table contain. I have a route to my outside
nat address via the address on the outside interface.