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Questions Related to Upgrading Cisco 1720 Router

Posted on 2006-06-19
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Last Modified: 2008-02-26
rtr1720#show ver                
Cisco Internetwork Operating System Software                                            
IOS (tm) C1700 Software (C1700-Y-M), Version 12.1(3)XT2, EARLY DEPLOYMENT RELEAS                                                                                
E SOFTWARE (fc1)                
TAC:Home:SW:IOS:Specials for info                                
Copyright (c) 1986-2001 by cisco Systems, Inc.                                              
Compiled Fri 23-Feb-01 12:39 by detang                                      
Image text-base: 0x800080E0, data-base: 0x806B0B24                              

ROM: System Bootstrap, Version 12.0(3)T, RELEASE SOFTWARE (fc1)
ROM: C1700 Software (C1700-Y-M), Version 12.1(3)XT2, EARLY DEPLOYMENT RELEASE SO
FTWARE (fc1)

rtr1720 uptime is 2 days, 5 hours, 52 minutes
System returned to ROM by power-on
System image file is "flash:c1700-y-mz.121-3.XT2.bin"

cisco 1720 (MPC860) processor (revision 0x301) with 17408K/3072K bytes of memory
.
Processor board ID JAD04010Z09 (1678117116), with hardware revision 0000
M860 processor: part number 0, mask 32
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
WIC T1-DSU
32K bytes of non-volatile configuration memory.
4096K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Please affirm understanding gained from reviewing other Ex/Ex answers related to my need to upgrade our used (& discontinued) Cisco 1720 Router shown above to gain SSH remote admin capability?

TRUE/FALSE
My Cisco 1720 router has only 4Mb of FLASH & 20Mb of RAM?

My current image file c1700-y-mz.121-3.XT2.bin does not support SSH?

Upgrading to IOS Release 12.2(34a) with Feature Set IP PLUS IPSEC 3DES (image file c1700-k9sy-mz.12.2-34a.bin) would allow secure remote administration of this router via SSH ?

Upgrading to IOS Release 12.2(34a) with Feature Set IP PLUS IPSEC 3DES (image file c1700-k9sy-mz.12.2-34a.bin) would require I upgrade the Cisco 1720 router memory to a minimum of 32Mb RAM and 8Mb of FLASH?

I will have to purchase a support contract from Cisco in order to download the newer image file with the feature set I need, correct?

I will need to purchase the Cisco 1720 router memory upgrade modules (FLASH & RAM) from an authorized Cisco reseller to qualify for support on the router?

Thanx tons to any ExEx Experts who can give thumbs up or down to my above listed suppositions.  I bought the Cisco 1720 router used, added the WIC T-1 DSU card and installed it as the perimeter router between ISP & our LAN.  I'm guessing I probably should have bought a higher end router for this purpose but I thought the PIX and the Catalyst switch downstream could do the heavy lifting?
dalvis
 



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Question by:dealvis
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lrmoore earned 250 total points
ID: 16937971
>My Cisco 1720 router has only 4Mb of FLASH & 20Mb of RAM?
TRUE
---17408K/3072K bytes of memory
17m + 3m = 20M RAM
---4096K bytes of processor board System flash
= 4Mb Flash

>My current image file c1700-y-mz.121-3.XT2.bin does not support SSH?
TRUE. IP ONLY does not support encryption required by SSH

>Upgrading to IOS Release 12.2(34a) with Feature Set IP PLUS IPSEC 3DES
Cisco's Software Advisor tool does not show any 12.2 versions with SSH support.
12.3 is the oldest that will support SSH
12.3(19)  c1700-k9o3sy7-mz.12.3-19    IP/ADSL/FW/IDS PLUS IPSEC 3DES  feature set

>would require I upgrade the Cisco 1720 router memory to a minimum of 32Mb RAM and 8Mb of FLASH?
FALSE. 12.3(19) requires 48M RAM and 16Mb flash

>I will have to purchase a support contract from Cisco in order to download the newer image file with the feature set I need, correct?
TRUE and you would also have to purchase an upgrade license from your current IP ONLY feature set to get the advanced security features.

>I will need to purchase the Cisco 1720 router memory upgrade modules (FLASH & RAM) from an authorized Cisco reseller to qualify for support on the router?
This is a gray area. You can purchase memory from many 3rd party vendors, but if it is not Cisco branded and you open a TAC case with Cisco, and they determine that it is a memory issue, Cisco will not support/relace the memory. If the problem is anything else at all, you will still get support to the level that you purchased with your SmartNet contract.

If your only purpose in trying to upgrade this router is to get SSH support - my advice is that it is simply too darn expensive to upgrade this obsolete router. Stick with Telnet with an access-list to restrict access and local username/password. Let the PIX behind it do all the "heavy lifting" of security features.


 

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Author Comment

by:dealvis
ID: 16941497
Thx Irmoore for reviewing my router info and the remote admin process suggestion - I'm going to do just that.  I'll do better the next time I go router shopping thanks to your information!
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