Re: What's a reasonable time

Phil R. Karn at mouton.ARPA (karn@mouton.ARPA)
Fri, 28 Mar 86 14:42:51 est

I agree with Mike. TTL values tend to be hard to change, especially in large
numbers of object-only systems. This value (15) has already caused a
problem with vanilla 4.2BSD gateways, which for some strange reason decided
to decrement TTL by 5 on each hop instead of 1. Fixing the gateways was
easier than fixing all the hosts (because there are fewer of the former than
the latter) but I don't want to think about what will happen when the
Internet diameter reaches 15.

How often do routing loops occur? If they are rare events, then why not just
make TTL = 255? If loops do occur, this will provide an adequate incentive
to fix the routing algorithms. :-)


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