Service Manual

Version Description
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.3.1.0 Add the DSCP value for ACL matching.
8.2.1.0 Allows ACL control of fragmented packets for IP (Layer 3) ACLs.
8.1.1.0 Introduced on the E-Series ExaScale.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
7.4.1.0 Added support for the non-contiguous mask and added the monitor option.
6.5.10 Expanded to include the optional QoS order priority for the ACL entry.
Usage
Information
The order option is relevant in the context of the Policy QoS feature only. The following applies:
● The seq sequence-number command is applicable only in an ACL group.
● The order option works across ACL groups that are applied on an interface via the QoS policy
framework.
● The order option takes precedence over seq sequence-number.
● If you do not configure sequence-number, the rules with the same order value are ordered
according to their configuration order.
● If you configure sequence-number, the sequence-number is used as a tie breaker for rules with the
same order.
Related
Commands
deny — configures a filter to drop packets.
permit — configures a filter to forward packets.
Extended IP ACL Commands
When an ACL is created without any rule and then applied to an interface, ACL behavior reflects an implicit permit.
The following commands configure extended IP ACLs, which in addition to the IP address, also examine the packet’s protocol
type.
The platform supports 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 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] [no-drop]
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.
198 Access Control Lists (ACL)