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Issue upgrading 1841 router to ios 15 FCS errors

Hello, 

 

I am having what I feel is a weird issue but, this could easily be due to inexperience with upgrading cisco routers. 

 

I have five cisco 1841 routers in my home lab. 3 of which have the image c1841-advipservicesk9-mz.151-4.M4.bin installed on a 64MB compact flash.

 

Two of these routers have the image c1841-ipbase-mz.124-7a.bin installed on a 32MB compact flash.

 

I checked the DRAM of the two routers with older images and I dont remember the exact numbers I can pull them up, but I believe they had enough DRAM to support the newer image. 

 

I bought two of the same exact type of compact flash cards (64MB cisco) that are installed in the routers with the newer image. 

 

I try the configuration below using the solarwinds tftp server, and the router in rommon mode. I have noticed something weird that happens on both routers. In wireshark my tftp server is sending packets just fine, I can see !!!!!!!!!!!!!!!! in my terminal indicating data transfer, but the router is dropping the packets and sending frame check sequence errors (in wireshark). Then eventually I get a timeout error. If someone could please help I would greatly appreciate it!

 

IP_ADDRESS=192.168.123.1

IP_SUBNET_MASK=255.255.255.0

DEFAULT_GATEWAY=192.168.123.1

TFTP_SERVER=192.168.123.100

TFTP_FILE=c1841-advipservicesk9-mz.151-4.M4.bin

 

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