Reference Guide

Interfaces | 569
• 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
Figure 18-4. show running config (partial)
Note: The flow control must be off (rx off tx off) before configuring the half duplex.
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
...