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.
To my knowledge(I AM NOT 100% sure), in CCNA exams no real switches/routers will be used but just the simulator with limited command support. Probably, the solution that you attempted is not a valid solution and hence the configuration was not allowed.
Yes I was at the configuration for FA0/0 and I went to set the an address with a 240 mask. All the formatting was defiently correct (Not being funny but this is something I have done many a time) and I wasted a lot of time trying to figure out why it was not working, verifying I had not mistyped the commands.
The preset IP on the interface did indeed have a .252 mask, even so you should be able to reconfigure with an address in another subnet (like you can normally) it would not even let me remove the IP address.
I am thinking this may be a bug in the simulation and if so I will be taking this up with Pearson (From research I understand there was a bug in 2009 with a simulation) I just want reassurance I have not missed anything obvious before I do so.
The marker itself point at the 1 in the first octet, i.e. 192.
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