Command Line Reference Guide

IPv6 Access Control Lists (IPv6 ACLs) | 667
Defaults
Not configured.
Command Modes
ACCESS-LIST
permit icmp
c e s
Configure a filter to allow all or specific ICMP messages.
Syntax
permit 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 permit icmp {source address mask | any | host ipv6-address} {destination
address | any | host ipv6-address} command.
Parameters
Defaults
Not configured
Command Modes
ACCESS-LIST
ipv6
Enter the keyword ipv6 to filter any Internet Protocol version 6.
tcp Enter the keyword tcp to filter the Transmission Control protocol.
udp Enter the keyword udp to filter the User Datagram Protocol.
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
(OPTIONAL) 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.