Configuration Guide User guide

1744 FastIron Configuration Guide
53-1002494-02
ACL-based rate limiting
The internal-priority-marking <0 – 7> parameter assigns traffic that matches the ACL to a specific
hardware forwarding queue (qosp0 – qosp7>.
NOTE
The internal-priority-marking parameter overrides port-based priority settings.
On the FCX platform, using either 802.1p-priority-marking or 802.1p-priority-marking with
internal-priority-marking performs both marking and internal prioritization.
In addition to changing the internal forwarding priority, if the outgoing interface is an 802.1Q
interface, this parameter maps the specified priority to its equivalent 802.1p (CoS) priority and
marks the packet with the new 802.1p priority. Table 285 lists the default mappings of hardware
forwarding queues to 802.1p priorities on the FESX and FSX.
The complete CLI syntax for 802.1p priority marking and internal priority marking is shown in
“Extended numbered ACL configuration” on page 1714 and “Extended named ACL configuration”
on page 1720. The following shows the syntax specific to these features.
Syntax: ... dscp-marking <0 – 63> 802.1p-priority-marking <0 – 7> internal-priority-marking <0 –
7>]
DSCP matching
The dscp-matching option matches on the packet DSCP value. This option does not change the
packet forwarding priority through the device or mark the packet.
To configure an ACL that matches on a packet with DSCP value 29, enter a command such as the
following.
Brocade(config)#access-list 112 permit ip 1.1.1.0 0.0.0.255 2.2.2.x 0.0.0.255
dscp-matching 29
The complete CLI syntax for this feature is shown in “Extended numbered ACL configuration” on
page 1714 and “Extended named ACL configuration” on page 1720. The following shows the
syntax specific to this feature.
Syntax: ...dscp-matching <0 – 63>
NOTE
For complete syntax information, refer to “Extended numbered ACL syntax” on page 1714.
ACL-based rate limiting
ACL-based rate limiting provides the facility to limit the rate for IP traffic that matches the permit
conditions in extended IP ACLs. This feature is available in the Layer 2 and Layer 3 code.
TABLE 285 Default mapping of forwarding queues to 802.1p priorities
Forwarding queue
qosp0 qosp1 qosp2 qosp3 qosp4 qosp5 qosp6 qosp7
802.1p 0 1 2 3 4 5 6 7