deny icmp
Configure a filter to drop all or specific internet control message protocol (ICMP) messages.
E-Series, Z-Series, S4810
Syntax
deny icmp {source mask | any | host ip-address} {destination
mask | any | host ip-address} [dscp] [message-type] [count
[byte] | log] [order] [monitor] [fragments]
To remove this filter, you have two choices:
• Use the no seq sequence-number command if you know the filter’s sequence
number.
• Use the no deny icmp {source mask | any | host ip-address}
{destination mask | any | host ip-address} command.
Parameters
source
Enter the IP address of the network or host from which the packets
were sent.
mask
Enter a network mask in /prefix format (/x) or A.B.C.D. The mask,
when specified in A.B.C.D format, may be either contiguous or non-
contiguous.
any Enter the keyword any to specify that all routes are subject to the
filter.
host
ip-address
Enter the keyword host and then enter the IP address to specify a
host IP address.
destination
Enter the IP address of the network or host to which the packets are
sent.
dscp Enter this keyword dscp to deny a packet based on the DSCP value.
The range is 0 to 63.
message-type
(OPTIONAL) Enter an ICMP message type, either with the type (and
code, if necessary) numbers or with the name of the message type.
The range is 0 to 255 for ICMP type and 0 to 255 for ICMP code.
count (OPTIONAL) Enter the keyword count to count packets processed
by the filter.
byte (OPTIONAL) Enter the keyword byte to count bytes processed by
the filter.
log (OPTIONAL, E-Series only) Enter the keyword log to have the
information kept in an ACL log file.
order (OPTIONAL) Enter the keyword order to specify the QoS priority for
the ACL entry. The range is 0 to 254 (where 0 is the highest priority
and 254 is the lowest; lower order numbers have a higher priority) If
you did not use the keyword order, the ACLs have the lowest order
by default (255).
monitor (OPTIONAL) Enter the keyword monitor when the rule is describing
the traffic that you want to monitor and the ACL in which you are
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