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I have come to understand how TTL works partially. Quoting Wikipedia
The TTL field is set by the sender of the datagram, and reduced by every router > on the route to its destination.
and
The maximum TTL value is 255, the maximum value of a single octet
Basing on these statement, I would assume all requests will be dropped if I am more than 255 hopes away in any configuration. Is there an exception I am missing? Or is there a rule that says you can not be farther than 225 away?
EDIT
And what is the advantage of limiting the TTL to 64 or lower. I see some OSs do that.
Is there a particular advantage to limiting the number ? – Amanuel Nega – 2016-03-04T08:31:03.510
1The advantage would be to recover from paralysis due to a routing loop faster. You can really reach anywhere in around 20 hops. By having a TTL of 64, a large transfer which hit a routing loop would be over in a quarter of the time that a TTL of 255 would take to recover. It's difficult to diagnose and correct such a problem when the routers are swamped by traffic in the loop. Switches use frames, which don't have anything like TTL in the frames, and you can completely kill a network indefinitely with an unchecked broadcast storm. – Ron Maupin – 2016-03-04T08:40:15.790