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Can I Upgrade IOS in Router With This Configuration.

Level 1
Level 1

Hi All,

We are using Cisco Voice router 3700 with 12.3 ios .So Some Commands related to SIP is not working with this Version of IOS. So please suggest which version will support all the commands related to SIP and Which is the higst version available for this model router. Can i upgrade with below hardware. Please find the Details for Hardware configuration.

oh-rt2#sh version

Cisco Internetwork Operating System Software

IOS (tm) 3700 Software (C3745-ADVIPSERVICESK9-M), Version 12.3(26), RELEASE SOFTWARE (fc2)

Technical Support:

Copyright (c) 1986-2008 by cisco Systems, Inc.

Compiled Mon 17-Mar-08 17:42 by dchih

ROM: System Bootstrap, Version 12.2(8r)T2, RELEASE SOFTWARE (fc1)

oh-rt2 uptime is 1 week, 16 hours, 16 minutes

System returned to ROM by power-on

System image file is "flash:c3745-advipservicesk9-mz.123-26.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

--More--         A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

cisco 3745 (R7000) processor (revision 2.0) with 248832K/13312K bytes of memory.

Processor board ID JPE084610D9

R7000 CPU at 350MHz, Implementation 39, Rev 3.3, 256KB L2, 2048KB L3 Cache

Channelized E1, Version 1.0.

Bridging software.

X.25 software, Version 3.0.0.

Primary Rate ISDN software, Version 1.1.

2 FastEthernet/IEEE 802.3 interface(s)

86 Serial network interface(s)

4 Serial(sync/async) network interface(s)

3 Channelized E1/PRI port(s)

8 Voice FXO interface(s)

DRAM configuration is 64 bits wide with parity disabled.

151K bytes of non-volatile configuration memory.

31360K bytes of ATA System CompactFlash (Read/Write)

Configuration register is 0x101


oh-rt2#sh flash

-#- --length-- -----date/time------ path

1     23051120 Dec 13 2008 13:06:00 +05:30 c3745-advipservicesk9-mz.123-26.bin

2       214630 Mar 1 1993 05:44:24 +05:30 crashinfo_19930301-001424

3        58241 Mar 1 1993 12:11:22 +05:30 crashinfo_19930301-064122

4        19475 Mar 1 1993 05:30:06 +05:30 crashinfo_19930301-000007

5       205921 Mar 14 1993 03:15:26 +05:30 crashinfo_19930313-214526

6       207156 Mar 1 1993 06:40:24 +05:30 crashinfo_19930301-011025

7        58245 Mar 1 1993 20:45:44 +05:30 crashinfo_19930301-151544

8        19544 Mar 1 1993 05:30:08 +05:30 crashinfo_19930301-000009

9       196289 Mar 3 1993 09:06:26 +05:30 crashinfo_19930303-033626

10      252692 Mar 2 1993 20:52:12 +05:30 crashinfo_19930302-152213

11      222225 Mar 1 1993 10:14:28 +05:30 crashinfo_19930301-044428

12      202269 Mar 22 1993 03:23:44 +05:30 crashinfo_19930321-215344

13       56620 Mar 3 1993 04:09:44 +05:30 crashinfo_19930302-223945

7147520 bytes available (24788992 bytes used)




1 Accepted Solution

Accepted Solutions

Hi Roopesh,

You can delete the crash info files from the flash. That would give you some space. Also, the size of the IOS may not exceed 66895008 bytes



Please rate useful posts :)

View solution in original post

7 Replies 7

Jaime Valencia
Cisco Employee
Cisco Employee

Use the IOS command lookup tool to find what IOS release has the commands you need

Then use the IOS advisor to find the right IOS and reqs for your HW



if this helps, please rate



if this helps, please rate

Dass Prakash R
Level 1
Level 1

Hi Roopesh,

You can positively use the latest release of IOS - 15.2 (3)



Please rate useful posts :)

HI Dass,

Thanks for the reply.

Can i Upgrade to 15.2 with Same Configuration . Ram ,flash, CPU will it support 15.2??



Yes for a 2 GB RAM you can upgrade it to 15.2(3). Ensure you have enough Flash storage for the IOS



Please rate useful posts

Hi Dass,

In flash I have

7147520 bytes available (24788992 bytes used).Is it enough ? 



Hi Roopesh,

You can delete the crash info files from the flash. That would give you some space. Also, the size of the IOS may not exceed 66895008 bytes



Please rate useful posts :)

Thanks Dass