ip access-list extended
— creates an extended ACL.
deny icmp
To drop all or specific internet control message protocol (ICMP) messages, configure a filter.
Z9500
Syntax
deny icmp {
source–ip—address mask
| any | host
ip-address
}
{
destination mask
| any | host
ip-address
} [log] [dscp] [[count
[bytes]] [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–ip—address mask
| any | host
ip-
address
} {
destination mask
| any | host
ip-address
}
command.
Parameters
source-ip-
address
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
then 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.
log
(OPTIONAL) Enter the keyword
log
to include ACL matches
in the log.
dscp
Enter this keyword
dscp
to deny a packet based on the
DSCP value. The range is from 0 to 63.
count
(OPTIONAL) Enter the keyword
count
to count packets
processed by the filter.
bytes
(OPTIONAL) Enter the keyword
bytes
to count bytes
processed by the filter.
order
(OPTIONAL) Enter the keyword
order
to specify the QoS
priority for the ACL entry. The range is from 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).
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Access Control Lists (ACL)
