NEC UNIVERGE SV8300 System Maintenance Manual page 66

(9) ICMP TYPE used in this feature is as follows.
ICMP CLASSIFI-
TYPE CATION
0 Reply
3 Reply
(error)
11 Reply
(error)
List of ICMP TYPE
GENERAL DESCRIPTION
Reply to the echo request by exe-
cuting the ping command (echo
reply)
Reply message resulting by the ping
request has not arrived at a destina-
tion.
ICMP TYPE=3 is replied if the ping
request is rejected by firewall pro-
tection. And no reply is received if
the ping request cannot arrive at a
destination or ping request is disre-
garded by firewall protection.
Reply message resulting by time
excess.
The message of packet discard
caused by TTL (Time To Live)
becomes 0 during transit, or the
message of time excess caused by
TTL becomes 0 during waiting for
lost fragments for re-assembly.
1-54
Chapter 1 MAINTENANCE SERVICES
MEANING
• Ping reply (ping OK)
• Network unreachable
• Host unreachable
• Protocol unusable
• Port unusable
• Fragmentation failed
• Source routing failed
• Destination network unknown
• Destination host unknown
• Source host isolated from network
• Rejection of destination network
• Rejection of destination host
• Network unreachable for TOS
• Communication administratively
prohibited by filtering
• Host precedence violation
• Precedence cutoff in effect
• TTL becomes 0 during transit
• TTL becomes 0 during waiting for
lost fragments for re-assembly.
Continued on next page
PING COMMAND
NOTE 2
NWA-033627-001 Rev.4.0
95ch1001.fm
JULY/17/2009