Reference Guide

742 | IPv6 Access Control Lists (IPv6 ACLs)
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deny icmp
c e s
Configure a filter to drop all or specific ICMP messages.
Syntax
deny icmp {source address mask | any | host ipv6-address} {destination address | any |
host ipv6-address} [message-type] [count [byte]] | [log] [monitor]
To remove this filter, you have two choices:
• Use the
no seq sequence-number command syntax if you know the filter’s
sequence number or
• Use the
no deny icmp {source address mask | any | host ipv6-address} {destination
address
| any | host ipv6-address} command.
Parameters
Defaults
Not configured
Command Modes
ACCESS-LIST
source address
Enter the IPv6 address of the network or host from which the packets
were sent in the
x:x:x:x::x format followed by the prefix length in the /x
format.
Range: /0 to /128
The
:: notation specifies successive hexadecimal fields of zero.
mask
Enter a network mask in /prefix format (/x).
any
Enter the keyword any to specify that all routes are subject to the filter.
host ipv6-address
Enter the keyword host followed by the IPv6 address of the host in the
x:x:x:x::x format.
The
:: notation specifies successive hexadecimal fields of zero
destination address
Enter the IPv6 address of the network or host to which the packets are
sent in the
x:x:x:x::x format followed by the prefix length in the /x
format.
Range: /0 to /128
The
:: notation specifies successive hexadecimal fields of zero.
message-type On the E-Series only, enter an ICMP message type, either with the type
(and code, if necessary) numbers or with the name of the message type.
Range: 0 to 255 for ICMP type; 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) Enter the keyword log to have the information kept in an
ACL log file.
monitor
(OPTIONAL) Enter the keyword monitor to monitor traffic on the
monitoring interface specified in the flow-based monitoring session
along with the filter operation.