Standard IP ACL Commands
When you create an ACL without any rule and then apply it to an interface, the ACL behavior reflects an implicit permit.
The C-Series and S-Series platforms (except the S4810) support Ingress IP ACLs only.
The S4810 and Z9000 support both Ingress and Egress IP ACLs.
NOTE: Also refer to the Commands Common to all ACL Types and Common IP ACL Commands sections.
deny
Configure a filter to drop packets with a certain IP address.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
deny {source [mask] | any | host ip-address} [count [byte] | 
log] [dscp 
value] [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 {source [mask] | any | host ip-address} 
command.
Parameters
source
Enter the IP address in dotted decimal format of the network from 
which the packet was sent.
mask
(OPTIONAL) 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 (discontiguous).
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 only.
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 enter ACL 
matches in the log.
dscp (OPTIONAL) Enter the keyword dcsp to match to the IP DCSCP 
values.
order (OPTIONAL) Enter the keyword order to specify the QoS order of 
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). The default is, if you do not use the keyword order, the 
ACLs have the lowest order by default (255).
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