Administrator Guide

ICMP
Message Type
Keywords
ICMP Message Type Name
host-tos-redirect Host redirect for TOS
host-tos-
unreachable
Host unreachable for TOS
host-unknown Host unknown
host-unreachable Host unreachable
information-reply Information replies
information-
request
Information requests
mask-reply Mask replies
mask-request Mask requests
mobile-redirect Mobile host redirect
net-redirect Network redirect
net-tos-redirect Network redirect for TOS
net-tos-
unreachable
Network unreachable for TOS
net-unreachable Network unreachable
network-
unknown
Network unknown
no-room-for-
option
Parameter required but no room
option-missing Parameter required but not present
packet-too-big Fragmentation needed and DF set
parameter-
problem
All parameter problems
port-unreachable Port unreachable
precedence-
unreachable
Precedence cutoff
protocol-
unreachable
Protocol unreachable
reassembly-
timeout
Reassembly timeout
redirect All redirects
router-
advertisement
Router discovery advertisements
router-
solicitation
Router discovery solicitations
source-quench Source quenches
source-route-
failed
Source route failed
time-exceeded All time exceeded
timestamp-reply Timestamp replies
timestamp-
request
Timestamp requests
238 Access Control Lists (ACL)