Qos map cos-dscp, Table 99 – Brocade Communications Systems Brocate Ethernet Access Switch 6910 User Manual

Page 474

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424

Brocade 6910 Ethernet Access Switch Configuration Guide

53-1002581-01

Priority Commands (Layer 3 and 4)

21

qos map cos-dscp

This command maps CoS/CFI values in incoming packets to per-hop behavior and drop precedence
values for priority processing. Use the no form to restore the default settings.

Syntax

qos map cos-dscp phb drop-precedence from cos0 cfi0...cos7 cfi7

no qos map cos-dscp cos0 cfi0...cos7 cfi7

phb - Per-hop behavior, or the priority used for this router hop. (Range: 0-7)

drop-precedence - Drop precedence used for Random Early Detection in controlling traffic
congestion. (Range: 0 - Green, 3 - Yellow, 1 - Red)

cos - CoS value in ingress packets. (Range: 0-7)

cfi - Canonical Format Indicator. Set to this parameter to “0” to indicate that the MAC
address information carried in the frame is in canonical format. (Range: 0-1)

D

EFAULT

S

ETTING

Command Mode

Interface Configuration (Port)

Command Usage

The default mapping of CoS to PHB values shown in

Table 99

is based on the recommended

settings in IEEE 802.1p for mapping CoS values to output queues.

show qos map phb-queue

Shows internal per-hop behavior to hardware queue map

PE

show qos map trust-mode

Shows the QoS mapping mode

PE

The default settings used for mapping priority values to internal DSCP values and back to the hardware queues are
designed to optimize priority services for the majority of network applications. It should not be necessary to modify any of
the default settings unless a queuing problem occurs with a particular application.

TABLE 98

Priority Commands (Layer 3 and 4)

Command

Function

Mode

TABLE 99

Default Mapping of CoS/CFI to Internal PHB/Drop Precedence

CFI

CoS

0

1

0

(0,0)

(0,0)

1

(1,0)

(1,0)

2

(2,0)

(2,0)

3

(3,0)

(3,0)

4

(4,0)

(4,0)

5

(5,0)

(5,0)

6

(6,0)

(6,0)

7

(7,0)

(7,0)

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