NEC Univerge NEAX 2000 IPS Command Manual page 806

COMMAND CODE TITLE:
FA
Y
No. MEANING
20 Execution of ping
command sending
[Series 3600]
ICMP TYPE used in this feature is as follows.
ICMP
CLASSIFICATION
TYPE
0 Reply
3 Reply (error)
8 Request
11
Reply (error)
12 Reply (error)
term
D IP APPARATUS INFORMATION
1ST DATA
DATA MEANING
00001000000001 00 + Sending
destination IP
00255255255254 address
GENERAL DESCRIPTION
Reply to the echo request by executing
the ping command (echo reply)
Reply message resulting by the ping
request has not arrived at a destination.
ICMP TYPE=3 is replied if the ping
request is rejected by firewall protec-
tion.
And no reply is received if the ping
request cannot arrive at a destination or
ping request is disregarded by firewall
protection.
Request by executing the ping com-
mand (echo request)
Reply message resulting by time excess.
The message of packet discard caused
by TTL (Time To Live) becomes 0 dur-
ing transit, or the message of time
excess caused by TTL becomes 0 dur-
ing waiting for lost fragments for re-
assembly.
Reply message resulting by the IP
header being abnormal or a required
option is not effective.
DATA
001000000000: X
255255255254: X
• 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 pro-
hibited by filtering
• Host precedence violation
• Precedence cutoff in effect
• Ping request
• TTL becomes 0 during transit
• TTL becomes 0 during waiting for lost
fragments for re-assembly.
• IP header abnormal
• Required options are unknown.
– 782 –
INDICATION
MEANING
Sending destination IP address
X: ICMP TYPE (0/3/11/12)
MEANING
NOTE 2
Continued on next page
NWA-008844-001 Rev.5.0
DECEMBER/02/2005
CMFA
91ch3008.fm