Brocade Communications Systems 2.1 사용자 설명서

qos flowcontrol

2

qos flowcontrol 

Activates and configures QoS flow control. 

Synopsis

qos flowcontrol tx [on | off] rx [on | off] 

no qos flowcontrol 

Operands

tx [on | off]

Activates or deactivates the transmission portion of flow control.

rx [on | off]

Activates the receiving portion of flow control.

Defaults

None

Command

Modes

Interface configuration mode

Description

This command configures and activates QoS flow control.

When a 1Gbps local port is already online, and the qos flowcontrol command is issued, the pause 
settings take effect immediately on that local port. However, when the link is toggled, pause is 
re-negotiated. The local port will advertise the most recent qos flowcontrol settings. After auto 
completes, the local port pause settings may change, depending on the outcome of the pause 
negotiation, per 802.3 Clause 28B, as shown in 

.

Usage

Guidelines

None

Examples

None

See Also

None 

TABLE 1

Pause negotiation results

Advertised LOCAL cfg

 Advertised REMOTE cfg

 Negotiated result

Rx=off Tx=on

 Rx=on  Tx=on

 asymmetrical: LOCAL Tx=on    --> pause --> REMOTE Rx=on

Rx=on  Tx=on

 Rx=off Tx=on

 asymmetrical: LOCAL Rx=on    <-- pause <-- REMOTE Tx=on

Rx=on  Tx=n/a

 Rx=on  Tx=n/a

 symmetrical : LOCAL Tx/Rx=on <-- pause --> REMOTE Tx/Rx=on

Rx=n/a Tx=n/a

 Rx=off Tx=off

 disable pause both sides