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To install/upgrade IOS on ASA, this is the procedure which I did. I am putting this together as it may help others.
1. Download TFTP software on PC - this act as a TFTP server.
2. Assign IP address / mask / GW to PC (y.y.y.2/255.255.255.0/y.y.y.1)
3. Console to ASA from PC
4. Connect E0/0 port on ASA to PC (straight through)
5. Reload ASA
6. Configure TFTP server
7. Use these commands on ASA as below
interface e0/0
address x.x.x.x (assigned to ASA interface)
server y.y.y.2 (assigned to tftp server)
file asa702-k8.bin
ping y.y.y.2 - Make sure you can ping the server from ASA
tftp
This will upload the file.
Copy tftp flash -- didnt work for me directly and I got a message file cannot be opened and I was not able to ping the server.
8. Make sure interface connected to PC is up/up. Name the interface (inside/outside) and assign an address. Add a default route to pointing to PC GW. Now should be able to ping the server.
int e0/0
nameif inside
ip address x.x.x.x 255.255.255.0
route inside 0 0 y.y.y.1
9. Copy tftp flash
server ip - y.y.y.y
source file name - asa702-k8.bin
dest file name - asa702-k8.bin
File will be copied.
10. boot system disk0:/asa702-k8.bin
11. wr mem
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