ICMP Message Type 
Keywords
ICMP Message Type Name
host-precedence-
unreachable
Host unreachable for precedence
host-redirect Host redirect
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
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