end-end packet delay?

yogesh_powar · #1 (**permalink**) 12-11-2005

following is the output from traceroute

traceroute 10.1.11.6
traceroute to 10.1.11.6 (10.1.11.6), 30 hops max, 38 byte packets
1 10.129.1.250 (10.129.1.250) 20.618 ms 0.335 ms 0.271 ms
2 192.0.20.1 (192.0.20.1) 0.694 ms 4.660 ms 0.422 ms
3 192.0.40.1 (192.0.40.1) 0.972 ms 1.917 ms 0.873 ms
4 saptak.hostel1.iitb.ac.in (10.1.11.6) 1.120 ms 0.816 ms 0.824 ms

Now if i ping the same machine it gives no output. Why?

Neo · #2 (**permalink**) 12-12-2005

Traceroute using UDP, as I recall, and PING uses ICMP. The protocols are different and therefore, the network responds differently depending on the configuration of hosts, firewalls and routers.

Just Ice · #3 (**permalink**) 12-12-2005

and with the amount of ping floods the net had gone through in the last few years --- a lot of networks have disabled ping inside their perimeters

yogesh_powar · #4 (**permalink**) 12-13-2005

how dow we disable ICMP ECHO packets?

Just Ice · #5 (**permalink**) 12-13-2005

the firewall --- whether software or separate device --- takes care of that

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