Marozsas listen to me

try to follow this rule with your mind and you will find the solution

now you are having MY SAME DOUBT which i had at the start of this post

it' s incredible but now i have solve the mistery and now you are having my same doubt for which some days ago i have started this post


follow this rule in your mind:

READ THE RULE:
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when a host ping another host, to verify if it can reach the destination host it check its personal ip, then check its personal subnet mask and defines the ranges of ip addresses which it can ping. After decided what range of ip it can ping he control the ip address of the destination machine, IGNORING, and i repeat, IGNORING what is the subnet mask of the DESTINATION MACHINE. It simply checks the ip of the other machine and ask itself: is the other machine ip in my range, yes or no??? if yes it can ping, if not it cannot ping, IT DOESN'T MATTER what is the subnet mask of THE DESTINATION MACHINE.

And again this happens also in the other machine. Other machine when receive a ping packet and has to sent it back ask itself the same question. Is the other machine ip in my range (IGNORING AGAIN OTHER MACHINE SUBNET MASKS)???
If other machine ip addess, IGNORING SUBNET MASK, is in its range, then the 2 way ping connection can be estabilished
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NO LET'S TRY TO APPLY THE RULE TO YOUR TWO EXAMPLES WRITTEN IN YOUR LAST REPLY
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EXAMPLE 1:

A 10.124.8.1/255.255.252.0 (range 10.124.8.0 to 10.124.11.255)
B 10.124.9.1/255.255.255.0 (range 10.124.9.0 to 10.124.9.255)

Host A ask itself, is the ip address of host B in my range?? YES!
Yes because the maximum value is 10.124.11.255 and so 10.124.9.1 is in the range.
Now host b ask itself the same question, is host A in my range? NO!!
No because 10.124.8.1 is not between the range 10.124.9.0 to 10.124.9.255

RESULT: As you have seen with your eyes they cannot ping each other

EXAMPLE 2:

A 10.124.9.2/255.255.252.0 (range 10.124.8.0 to 10.124.11.255)
B 10.124.9.1/255.255.255.0 (range 10.124.9.0 to 10.124.9.255)


Host A ask itself, is the ip address of host B in my range?? YES!
Yes because the maximum value is 10.124.11.255 and so 10.124.9.1 is in the range.
Now host B ask itself the same question, is host A in my range? YES AGAIN!! Yes because 10.124.9.2 is in the range of host B which is from 10.124.9.0 to 10.124.9.255

RESULT: they can successfully ping each other!!


This is the rule to keep in mind, for hosts it doesn't really matter what is the destination host subnet mask, they simply control:

1)their personal subnet mask
2)their personal address
3)the range of the subnet where they are
3)the destination host ip address

and then decide.


Keep in mind this and you will be on the right path

I know that it is a strange situation but it can be possible, i have discovered this in one day, very illogical but possible, just follow the rule

As confusing as it may sound, the question is what determines, "what is on the same network" and the answer is the netmask of the host asking that question. If you look back at my previous post, you will see where I show HostA checking HostB's address vs it's subnet mask.

To expand further, I wouldn't suggest putting into production a network setup like this but simple direct communication will work. A ping request sends a direct ICMP echo request and after determining that (it thinks) the other host is on the same network, it will do an ARP request for the MAC of the other host and send the packet on the local LAN. No router required here and FYI every system has routes to the networks it has addresses on it's route table. More complex communication would of course break since the two systems have different broadcast addresses.

(lol) It is a kind of mind virus I guess

The rest of your post make sense too.
I was resistant at begin, because I learned that way as a sort of 11th Commandment of God, you know...

Thanks for your time.

see'ya,

Hi Darin,
This is a very concise statement. Is pretty much the same Berkut83 said in his post in a more compact form. I was taking in account the netmask of both machines, what leads me to that state of mental confusion.

Thanks for time too, Darin !

see'ya,

Thanks to all of you too

Finally we all agree with the same


Thanks also to Darin to have written the rule in a short manner


Bye all and thanks again

For another time, this forum has showed me again how fantastic and helpful is this community