ICMP issues for standard ping?

["Mike ." <dmciscobgp () hotmail com>]

i typed this all out before. either no one cared or it got lost in the shuffle. gonna send again because i am still 
bewildered. ok--setup is simple. 1 laptop, win7, one home cisco router all connected ethernet. no firewall running and 
no filtering i did on the cisco. when i go to a prompt and do a simple ping echo type 8 i get this for the traffic. me 
sending, me receiving: (pinging my TIVO box: 192.168.0.10)


IP (tos 0x0, ttl 128, id 26085, offset 0, flags [none], proto: ICMP (1), length:
 60) 192.168.0.16 > 192.168.0.10: ICMP echo request, id 1, seq 358, length 40

IP (tos 0x0, ttl  64, id 65278, offset 0, flags [none], proto: ICMP (1), length:
 60) 192.168.0.10 > 192.168.0.16: ICMP echo reply, id 1, seq 358, length 40

same thing with NMAP now. and not the same results. my question is WHY? why am i sending that port unreachable using 
NMAP? and is this an NMAP thing or mine is the question. thank you

command used: nmap -sn -PE -vv -n 192.168.0.10 -disable-arp-ping

IP (tos 0x0, ttl  40, id 62683, offset 0, flags [none], proto: ICMP (1), length:
 28) 192.168.0.16 > 192.168.0.10: ICMP echo request, id 19712, seq 0, length 8

IP (tos 0x0, ttl  64, id 65282, offset 0, flags [none], proto: ICMP (1), length:
 28) 192.168.0.10 > 192.168.0.16: ICMP echo reply, id 19712, seq 0, length 8

IP (tos 0x0, ttl 128, id 26454, offset 0, flags [none], proto: ICMP (1), length:
 56) 192.168.0.16 > 192.168.0.10: ICMP 192.168.0.16 protocol 1 unreachable, leng
th 36

(is the sequence supposed to be 0?)


Mike








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