There used to be an old flag you could set on an ICMP_ECHO request to record the path the echo reply takes back (ping -R or -r?), but apparently its not used much anymore. Probably just as well.. it could only hold ~8 hops.. Andy ----- Original Message ----- From: Darrell Carley To: nanog@merit.edu Sent: Thursday, October 17, 2002 10:31 AM Subject: question concerning traceroute? I am trying to troubleshoot a latency issue for some of our networks, and was wondering about this.Knowing that routing isn't always symmetrical, is it possible for a traceroute to traverse a different reverse path, than the path that it took to get there? .or will it provide a trace of the path the packet took to reach the destination? According to definition, is should take the same path, but are there any other cases that I should be aware of? Darrell