Reference Guide

214 | Access Control Lists (ACL)
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The order option is relevant in the context of the Policy QoS feature only. The following applies:
• The seq sequence-number is applicable only in an ACL group.
• The order option works across ACL groups that have been applied on an interface via QoS policy
framework.
• The order option takes precedence over the seq sequence-number.
• If sequence-number is not configured, then rules with the same order value are ordered
according to their configuration order.
• If the sequence-number is configured, then the sequence-number is used as a tie breaker for
rules with the same order.
You cannot include IP, TCP or UDP (Layer 3) filters in an ACL configured with ARP or Ether-type
(Layer 2) filters. Apply Layer 2 filters to interfaces in Layer 2 mode.
seq
c e s z
Assign a sequence number to a deny or permit filter in an extended IP access list while creating the
filter.
Syntax
seq sequence-number {deny | permit} {ip-protocol-number | icmp | ip | tcp | udp}
{source mask | any | host ip-address} {destination mask | any | host ip-address} [operator
port [port]] [count [byte] | log] [dscp value] [order] [monitor] [fragments]
To delete a filter, use the no seq sequence-number command.
Parameters
Note: When ACL logging and byte counters are configured simultaneously, byte counters
may display an incorrect value. Configure packet counters with logging instead.
sequence-number
Enter a number from 0 to 4294967290.
deny Enter the keyword deny to configure a filter to drop packets meeting this condition.
permit Enter the keyword permit to configure a filter to forward packets meeting this
criteria.
ip-protocol-number
Enter a number from 0 to 255 to filter based on the protocol identified in the IP
protocol header.
icmp Enter the keyword icmp to configure an ICMP access list filter.
ip Enter the keyword ip to configure a generic IP access list. The keyword ip specifies
that the access list will permit all IP protocols.
tcp Enter the keyword tcp to configure a TCP access list filter.
udp Enter the keyword udp to configure a UDP access list filter.
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.