Subject: [mobile-ip] "Traceroute" in MIPv4

From: Sridhar Gurivireddy <[email-masked]>
Date: Thu, 12 Jul 2001 10:32:47 -0500

"Traceroute" program works by incrementing TTL value from 1 to 255 and
by sending ICMP echo_request packet in the payload....The source lists
all the routers which send "ICMP_TTL_exceeded" to trace the route to IP
host....I guess "Traceroute" does not work in MIPv4

Let CN run "traceroute" program to find the route to MN...

Case 1: Alternate CoA used
After the FA decapsulates the packet and finds that  TTL=0 , it sends
"TTL exceeded" message back to HA. HA manupulates this packet and
changes the packet to ICMP_HOST_UNREACHABLE..{As per Mobile Ipv4
specification)  When the CN gets this packet, it is going to stop the
"traceroute" program..So, I guess "traceroute" does not work...

Case 2: Co-located CoA used:
Even in this case it does not work for the same reason....

--
Sridhar Guriviredddy,
Ph:  972.996.2048