Reference Guide

Interfaces | 333
On the C-Series and S-Series systems, the flow-control sender and receiver must be on the same port-pipe.
Flow control is not supported across different port-pipes on the C-Series or S-Series system.
Command Syntax Command Mode Purpose
flowcontrol rx [off | on] tx [off | on] [threshold
{<1-2047> <1-2013> <1-2013>}]
INTERFACE Control how the system responds to and
generates 802.3x pause frames on 1 and 10Gig
line cards.
Defaults:
C-Series:
rx off tx off
E-Series: rx on tx on
S-Series: rx off tx off
S60: rx off
Parameters:
rx on: Enter the keywords rx on to process the received flow control
frames on this port.
rx off: Enter the keywords rx off to ignore the received flow control
frames on this port.
tx on: Enter the keywords tx on to send control frames from this port
to the connected device when a higher rate of traffic is received.
tx off: Enter the keywords tx off so that flow control frames are not
sent from this port to the connected device when a higher rate of traffic
is received.
threshold (C-Series and S-Series only): When tx on is configured,
the user can set the threshold values for:
Number of flow-control packet pointers: 1-2047 (default = 75)
Flow-control buffer threshold in KB: 1-2013 (default = 49KB)
Flow-control discard threshold in KB: 1-2013 (default= 75KB)
Pause control is triggered when either the flow control buffer threshold
or flow control packet pointer threshold is reached.