brescia@BBN.COM (Mike Brescia) (02/14/89)
Why do the "Mail bridges" not decrement the TTL? Or, do they? (on 26.0.0.90) #./traceroute ucbarpa.berkeley.edu traceroute to ucbarpa.berkeley.edu (10.0.0.78), 30 hops max, 40 byte packets 1 UCBARPA.Berkeley.EDU (10.0.0.78) 633 ms 769 ms 595 ms # Phil, I am not sure whether you are claiming to find the "failure to decrement" bug or the "failure to discard when TTL is 1" bug. We see the gateways decrementing the TTL field in packets which they pass. They should also be careful to pass a packet only if the TTL is still non-zero when they send it on, but this may not have been rigorously tested. Think of it as a fencepost problem. Mike