Reference Guide

610 | Interfaces
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Changes in the flow-control values may not be reflected automatically in the show interface
output. As a workaround, apply the new settings, execute
shut followed by no shut on the
interface, and then check the running-config of the port using the
show interface command.
Important Points to Remember
• Do not enable tx pause when buffer carving is enabled. Consult Dell Force10
TAC for information and assistance.
• Asymmetric flow control (
rx on tx off or rx off tx on) setting for the interface port
less than 100 Mb/s speed is not permitted. The following error is returned:
Can’t configure Asymmetric flowcontrol when speed <1G, config
ignored
• The only configuration applicable to half duplex ports is rx off tx off. The
following error is returned:
Can’t configure flowcontrol when half duplex is configure, config
ignored
• Half duplex cannot be configured when the flow control configuration is on
(default is
rx on tx on). The following error is returned:
Can’t configure half duplex when flowcontrol is on, config ignored
• Speeds less than 1 Gig cannot be configured when the asymmetric flow control
configuration is on. The following error is returned:
Can’t configure speed <1G when Asymmetric flowcontrol is on, config
ignored
• FTOS only supports rx on tx on and rx off tx off for speeds less than 1 Gig
(Symmetric).
• 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.
Example
FTOS(conf-if-gi-0/1)#show config
!
interface GigabitEthernet 0/1
no ip address
switchport
no negotiation auto
flowcontrol rx off tx on
no shutdown
...
Note: If rx flow control is disabled, Dell Force10 recommends rebooting the system.
Note: The flow control must be off (rx off tx off) before configuring the half duplex.