Symmetrical Flow Control

In addition to asymmetric flow control, RUCKUS devices support symmetrical flow control (SFC), meaning the ports can both receive and transmit 802.3x PAUSE frames.

Symmetrical flow control is best enabled when an application has a requirement for a lossless service class in an Internet Small Computer System Interface (iSCSI) environment. Symmetrical flow control is supported on standalone units as well as on all units in a traditional stack. Once this feature is enabled, ingress buffer limits take effect, while egress buffer limits are ignored. The ingress buffer limit dictates flow control behavior.

In this section:

  1. Configuration Notes and Feature Limitations for Symmetrical Flow Control
  2. Configuring Symmetrical Flow Control
    Symmetrical flow control (SFC) is globally disabled by default. However, because flow control is enabled by default on all ports, these ports will always honor received 802.3x Pause frames, irrespective of whether symmetrical flow control is enabled or disabled.
  3. Displaying Symmetrical Flow Control Status
    You can display the SFC status by using the show symmetrical-flow-control command.
Parent topic: Basic port parameter configuration