Brocade BigIron RX Series Configuration Guide User Manual
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BigIron RX Series Configuration Guide
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Configuring numbered and named ACLs
22
•
Enter 0 – 63 for the dscp-marking <number> parameter.
•
The dscp-cos-mapping parameter takes the DSCP value you specified and compares it to
an internal QoS table, which is indexed by DSCP values. The corresponding 802.1p priority,
internal forwarding priority, and DSCP value is assigned to the packet.
For example, if you enter dscp-marking 7 and the internal QoS table is configured as
shown in
, the new QoS value for the packet is:
•
802.1p (COS) value: 7
•
DSCP value: 48
•
Internal Forwarding Priority: 0
•
Use the DSCP value in the packet’s header to alter its QoS value. Enter the following
parameter.
dscp-cos-mapping
When you enter dscp-cos-mapping, the DSCP value in the packet’s header is compared to a
column in the internal QoS table. The 802.1p priority, internal forwarding priority, and DSCP
value that are mapped to the matching column is assigned to the packet.
For example, if the DSCP value in the packet’s header is 2, using the mappings in
,
the packet’s new QoS value is:
•
802.1p (COS) value: 2
•
DSCP value: 15
•
Internal Forwarding Priority: 6
For more information on QoS and internal forwarding queues, refer to
Parameters to bind standard ACLs to an interface
Use the ip access-group command to bind the ACL to an interface and enter the ACL number for
<num>.
TABLE 113
Example internal QOS table mappings
DSCP value
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
802.1p (COS)
Value
0
1
2
3
4
5
6
7
1
2
3
4
5
6
7
DSCP Value
0
15
20
3
4
5
25
48
8
9
10
11
12
13
14
Internal
Forwarding
Priority
7
6
5
4
3
2
1
0
1
3
0
0
0
0
0