Technical data

BLADE OS 5.1 Application Guide
BMD00136, November 2009 Chapter 7: Quality of Service
 101
Summary of ACL Actions
Actions determine how the traffic is treated. The G8000 QoS actions include the following:
 Pass or Drop
 Re-mark a new DiffServ Code Point (DSCP)
 Re-mark the 802.1p field
 Set the COS queue
ACL Port Mirroring
Packets that match an ACL can be mirrored to an interface port. The port through which packets are
mirrored must be a physical port. A portchannel cannot be used as a mirror port, but the mirror port
can be a member of a portchannel. If the mirror port has an ACL applied to it, it cannot be used to
mirror packets for that ACL.
Use the following command to configure an ACL mirror port.
ACL Order of Precedence
When multiple ACLs are assigned to a port, the order in which the ACLs are applied to port traffic
(or whether they are applied at all) depends on the following factors:
 The precedence group in which the ACL resides;
 The ACL number;
 Whether a prior ACL in the precedence group is also matched;
 And whether the ACL action is compatible with preceding ACLs.
ACLs are automatically divided into precedence groups as follows:
Precedence Group 1 includes ACL 1–128.
Precedence Group 2 includes ACL 129–256.
Precedence Group 3 includes ACL 257–384.
Precedence Group 4 includes ACL 385–512.
Precedence Group 5 includes ACL 513–640.
The switch processes each precedence group in numeric sequence; Precedence group 1 is evaluated
first, followed by precedence group 2, and so on.
>> # access-control list <ACL number> mirror port <port alias or number>