'verify /md5' is nothing, still ..a valid magic number

I really really under preasure yesterday in lunch time. I have critical a network with one of PE from MPLS, PE really really critical, router still on but many have error undercontrol, lost of ability from the a76 series router. So my team dedicate to uprade IOS version with new disk. Old disk in disk0 with 128MB compact flash memory and new disk with new IOS version in disk 1 with 256MB compact flash memory.

Before lunch time I already 'verify /md5' new IOS version but boot failed :(

Loading image, please wait ...

device does not contain a valid magic number
loadprog: error - on file open
boot: cannot load bla bla bla

and then rommon prompt

As long as I know 'verify /md5' is guarantee to work well, but I never know tutorial or document about it from Cisco.

Finally I format from IOS command use 'format disk1:/' and then upload IOS image use FTP use 'copy ftp://user:password@host-ftp/image.bin disk1:/image.bin'. Try boot again work well :).

'IP Source Binding' for Static IP & Mac Address

A few days ago my friend ask about static IP & Mac address, want to help his customer about static IP address & mac address for LAN. I said can use 'dhcp snooping', I ever read about binding host information like IP and mac address in Cisco Switch dynamicly database using DHCP database or static but I don't know implement it.

Today I try in Cisco Switch Catalyst 3560 IOS version 12.2(35)SE1 (C3560-Advipservicesk9-M work well.
Before it I try in Cisco Router 3660 IOS version 12.2(13) (C3660-JS-M) with NM-16ESW module failed, there is no 'ip source binding' command, 'ip verify source port-security' and 'ip dhcp snooping' command.

I will show step about static IP & Mac
- ip source binding IOS command just work in several IOS version, I still confuse what type of IOS version can do it
- just work in 'switchport mode' interface
- a mac address can't multiply IP address
- a IP adress can multiply mac address

#conf t
#ip dhcp snooping --> to active snooping
#ip dhcp snooping vlan 44 --> specific work in vlan 44

#ip source binding 0123.4567.8901 vlan 44 192.168.0.1 interface Fa0/44

#interface Fa0/44
#ip verify source port-security --> to verify source IP & Mac address