I--- Download C2900-universalk9-mz.spa.157-3.m8.bin -- -

| Requirement | Minimum Spec | | --- | --- | | Flash Memory | 256 MB (512 MB recommended for universalk9) | | DRAM | 512 MB (768 MB for full security features) | | Bootloader (ROMMON) | Version 15.0(1r) or higher | | Current IOS | 15.0(1)M or later (skip 12.4 if possible) |

license boot level securityk9 reload If you have a PAK file from Cisco: i--- Download C2900-universalk9-mz.spa.157-3.m8.bin --

license boot level ipbasek9 reload

no ip http-server no ip http-secure-server ip ssh version 2 ip ssh source-interface GigabitEthernet0/0 service password-encryption login block-for 120 attempts 3 within 60 If you are running 15.4(3)M or earlier on a Cisco 2901/2911/2921/2951 router, yes , you should upgrade to c2900-universalk9-mz.spa.157-3.m8.bin . It is a mature, stable release that enhances security and reliability without the "bleeding-edge" risk of newer 15.9 or 16.x releases (which the 2900 series does not support). | Requirement | Minimum Spec | | ---

copy running-config tftp://your-tftp-server/backup-config.txt Distributing these files without a valid support contract

It is important to clarify from the outset that to proprietary Cisco iOS images, including the file c2900-universalk9-mz.spa.157-3.m8.bin . Distributing these files without a valid support contract violates Cisco’s copyright and licensing terms.