Command Line Reference Guide

Access Control Lists (ACL) | 213
• permit ether-type
• permit icmp
• permit tcp
• permit udp
• resequence access-list
• resequence prefix-list ipv4
• seq arp
• seq ether-type
• seq
deny
c e s
Configure a filter that drops IP packets meeting the filter criteria.
Syntax
deny {ip | ip-protocol-number} {source mask | any | host ip-address} {destination 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 syntax if you know the filter’s sequence number or
• Use the no deny {ip | ip-protocol-number} {source mask | any | host ip-address}
{destination mask | any | host ip-address} command.
Parameters
Note: See also Commands Common to all ACL Types and Common IP ACL Commands.
ip Enter the keyword ip to configure a generic IP access list. The keyword ip
specifies that the access list will deny all IP protocols.
ip-protocol-number
Enter a number from 0 to 255 to deny based on the protocol identified in the IP
protocol header.
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 followed by 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.
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 priority for the
ACL entry.
Range: 0-254 (where 0 is the highest priority and 254 is the lowest; lower order
numbers have a higher priority)
Default: If the order keyword is not used, the ACLs have the lowest order by
default (255).