can i update IOS of 1841 router to 15 by updating Hardware

[mastanvali1]

HI,

At work place I had CISCO 1841 routers with 128 MB Memory and 30 MB flash. Can I use these routers for IPv6 by updating hardware and making existed IOS version to 15 without data loss problems

Can you please update on this

Thanks

Regards,

Vali

[karmakar]

Cisco IOS Software Release 15.0 Feature Sets and Memory Recommendations for Cisco 1800 Series Integrated Services Router…