In the CCNA exam there was a question regarding EIGRP, I am not going to post specific details as I do not want to infringe the rules/copyright.
Suffice to say there are three routers and one I noticed was on a different subnet.
Therefore as part of the solution I went to change the IP address of an interface, however when doing so I got ^Invalid input detected at ^ marker' this referred to the 1 in the first octet of the address I had specified.
Can anyone explain why this is, this command is of course valid and specified at the correct place, It was also not possible to remove the IP address.
I have been thinking this over and I can not possibly understand why this happened, can anyone explain?
Sorry for the story but it is really bugging me and I cannot understand as to why this happened.