NEC Univerge SV8300 - Page 764

3-708 NWA-033623-001 Rev.8.1
91ch3008.fm
COMMAND CODE
TITLE:
IP STATION APPARATUS INFORMATION
FA
NOTE 1: ICMP TYPE used in this feature is as follows.
• Receiving ICMP TYPE=0 (ping reply) from the destination terminal means that the terminal is cor-
rectly connected/set.
• Receiving ICMP TYPE=3/11/12 (reply [error]) from the destination terminal means that the terminal
is not correctly connected/set.
Continued on next page
ICMP
TYPE
CLASSI-
FICATION
GENERAL DESCRIPTION MEANING
0 Reply Reply to the echo request by executing the
ping command (echo reply).
• Ping reply (ping OK)
3Reply
(error)
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 protection.
And no reply is received if the ping request
cannot arrive at a destination or ping request
is disregarded by firewall protection.
• 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 NOTE 3
• Communication administratively prohibited
by filtering
• Host precedence violation
• Precedence cutoff in effect
11 Reply
(error)
Reply message resulting by time excess.
The message of packet discard caused by
TTL (Time To Live) becomes 0 during tran-
sit, or the message of time excess caused by
TTL becomes 0 during waiting for lost frag-
ments for re-assembly.
• TTL becomes 0 during transit
• TTL becomes 0 during waiting for lost frag-
ments for re-assembly.
12 Reply
(error)
Reply message resulting by the IP header
being abnormal or a required option is not
effective.
• IP header abnormal
• Required options are unknown.
JULY/17/2009
CMFA