Users Guide

Extended Egress IP access list ten
seq 5 permit tcp any eq 1 any
seq 10 deny ip any host 11.11.11.11 count (0 packets)
Extended IP ACL Commands
The following commands configure extended IP ACLs, which in addition to the IP address, also examine the packet’s protocol
type.
The C9000 supports both Ingress and Egress IP ACLs.
When an ACL is created without any rule and then applied to an interface, ACL behavior reflects an implicit permit.
NOTE: Also refer to the Commands Common to all ACL Types and Common IP ACL Commands sections.
deny
Configure a filter that drops IP packets meeting the filter criteria.
C9000 Series
Syntax
deny {ip | ip-protocol-number} {source mask | any | host ip-address}
{destination mask | any | host ip-address} [count [bytes]] [dscp value]
[order] [monitor] [fragments] [log [interval minutes] [threshold-in-msgs
[count]] [monitor]
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 {ip | ip-protocol-number} {source mask | any | host ip-
address} {destination mask | any | host ip-address} command.
Parameters
ip Enter the keyword ip to configure a generic IP access list. The keyword ip
specifies that the access list denies 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 noncontiguous.
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.
count (OPTIONAL) Enter the keyword count to count packets that the filter processes.
bytes (OPTIONAL) Enter the keyword byte to count bytes that the filter processes.
dscp (OPTIONAL) Enter the keyword dcsp to match to the IP DSCP values. The range
is from 0 to 63.
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 do not use the keyword
order, the ACLs have the lowest order by default (255).
fragments Enter the keyword fragments to use ACLs to control packet fragments.
log (OPTIONAL) Enter the keyword log to include ACL matches in the log.
224 Access Control Lists (ACL)