network address translation on a 7204vxr

[mrouch]

We just purchased a 7204vxr router with an NPE-G1 engine card to replace our old 3661. I'm trying to migrate the 3661's config over to the 7204, but the "ip nat" statements do not work. I've searched the Cisco site for 7204 nat instructions, but all I've been able to find so far are references to the fact that the 7204 is capable of nat. So far I have found no config examples. Can someone please let me know what the nat commands are, or point me to a reference that will explain it?

Thanks,

-Mat

[olorunloba]

Should be the same commands. Check your IOS version. NAT might not be supported on the IOS running on the 7204. You might need to upgrade it.

Regards

[mrouch]

The IOS version is 12.2(4)BW. The image file is c7200-kboot-mz.122-4.BW. That should support natting, shouldn't it?

[olorunloba]

I think not, the image file you gave is the boot image. This should not be the actual running image on the router. Pardon my reference to IOS version. It would have been better put as the feature set of the IOS version.

Note, you might be in RxBoot mode.

give us your show version and your show flash.

[mrouch]

Here it is:

----- Start paste of "sh ver"-----

Cisco Internetwork Operating System Software

IOS (tm) 7200 Software (C7200-KBOOT-M), Version 12.2(4)BW, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Mon 26-Aug-02 19:25 by kellythw

Image text-base: 0x60008A00, data-base: 0x60856000

ROM: System Bootstrap, Version 12.3(4r)T1, RELEASE SOFTWARE (fc1)

BOOTLDR: 7200 Software (C7200-KBOOT-M), Version 12.2(4)BW, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

Valinor uptime is 1 minute

System returned to ROM by power-on

System image file is "bootflash:c7200-kboot-mz.122-4.BW"

cisco 7204VXR (NPE-G1) processor (revision A) with 245760K/16384K bytes of memory.

Processor board ID 31414861

SB-1 CPU at 700Mhz, Implementation 1, Rev 0.2, 512KB L2 Cache

4 slot VXR midplane, Version 2.7

Last reset from power-on

Bridging software.

X.25 software, Version 3.0.0.

3 Gigabit Ethernet/IEEE 802.3 interface(s)

1 Channelized T3 port(s)

509K bytes of non-volatile configuration memory.

62592K bytes of ATA PCMCIA card at slot 2 (Sector size 512 bytes).

16384K bytes of Flash internal SIMM (Sector size 256K).

Configuration register is 0x2102

----- End paste -----

----- Start paste of "sh flash" -----

Open device slot0 failed (Bad device info block)

----- End paste -----

In addition to the "slot0 failed" above, which is obviously not right, the prompt for my console session is "Hostname(boot)>", which does not look normal to me. How do I get out of this?

[olorunloba · Accepted solution]

Your router I guess is in Boot mode, because he can not load the actual image from flash. I guess you need to reformat the flash, then copy a valid image to the flash from an TFTP or FTP server.

Check the following link

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080094c07.shtml

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration_guide_chapter09186a00800c6c63.html

[Richard Burts]

Also be aware with the G1 processor that the PCMCIA disk is disk2 not the disk0 or disk1 that you would normally think of.

Instead of the show flash that you included in your posting, try a show disk2: and see if there is a valid IOS on the card. If not, then you probably will need to format and copy IOS to it.

[mrouch]

Okay, I still have problems, but they're different problems. It turns out that there was no image on the ATA Flash card. I formatted the card (disk2) and downloaded the IP Plus image c7200-is-mz.122-24.bin. I pulled it to disk2: via tftp, added the statement "boot system disk2:c7200-is-mz.122-24.bin" to the running-config and rebooted. Now it finds the image file but cannot load it for some reason. it tries four times to load the file, throwing a different error message each time. After that fails, it comes up in boot mode again. Here are the error messages:

Pass 1:

*** Illegal Opcode Exception ***

PC = 0x87ff7820, SP = 0x87fffe10, RA = 0x80009858

Cause Reg = 0x00000028, Status Reg = 0x3040d003

monitor: command "boot" aborted due to exception

Pass 2:

*** Emulating mis-aligned load at 0x00007dd4

PC = 0x87ff7808 ... failed, opcode = 0x0

monitor: command "boot" aborted due to exception

Pass3:

*** TLB (Load/Fetch) Exception ***

Access address = 0x3040d026

PC = 0xb0020000, SP = 0x80008008, RA = 0xafbf0064

Cause Reg = 0x00000008, Status Reg = 0x3040d003

monitor: command "boot" aborted due to exception

Pass4:

*** TLB (Load/Fetch) Exception ***

Access address = 0xb84695

PC = 0x80040014, SP = 0x80007fa0, RA = 0x800080c4

Cause Reg = 0x00000008, Status Reg = 0x3040d003

monitor: command "boot" aborted due to exception

Any idea what this means?

[Richard Burts]

For sure there was some problem when the router booted. You are not running the normal IOS, you are running the bootIOS. The functionality of the router in boot mode is very limited.

In addition to the show ver info here, it would probably be helpful if you cound get the console or log messages from when the router was booting so we could see what was happening. This might give us insight into what the problem is.

[mrouch]

Okay, the problem is solved. It turns out that the NPE-G1 engine card is VERY picky about which IOS image you apply. I found documentation that said to use 12.2(4)BW, or 12.2(x)B where x>=8. I applied 12.2(15)B and that seems to work. Thanks for the help.